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uhttpd: - rewrite large parts of the server, use uloop event driven structure - support concurrent requests and make the upper limit configurable - implement initial version of HTTP-to-ubus JSON proxy and session.* namespace - add compile time support for debug information - code style changes - bump package revision

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SVN-Revision: 31931
This commit is contained in:
Jo-Philipp Wich 2012-05-28 00:52:24 +00:00
parent 8039a1bbb2
commit 022fa36b40
18 changed files with 2637 additions and 1393 deletions
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55
package/uhttpd/Makefile
View file

@ -8,14 +8,16 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=uhttpd
PKG_RELEASE:=32
PKG_RELEASE:=33
PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
PKG_CONFIG_DEPENDS := \
CONFIG_PACKAGE_uhttpd_debug \
CONFIG_PACKAGE_uhttpd-mod-lua \
CONFIG_PACKAGE_uhttpd-mod-tls \
CONFIG_PACKAGE_uhttpd-mod-tls_cyassl \
CONFIG_PACKAGE_uhttpd-mod-tls_openssl
CONFIG_PACKAGE_uhttpd-mod-tls_openssl \
CONFIG_PACKAGE_uhttpd-mod-ubus
include $(INCLUDE_DIR)/package.mk
@ -29,7 +31,7 @@ endef
define Package/uhttpd
$(Package/uhttpd/default)
MENU:=1
DEPENDS:=+libubox
endef
define Package/uhttpd/description
@ -38,6 +40,12 @@ define Package/uhttpd/description
HTTP daemon.
endef
define Package/uhttpd/config
config PACKAGE_uhttpd_debug
bool "Build with debug messages"
default n
endef
define Package/uhttpd-mod-tls
$(Package/uhttpd/default)
@ -50,17 +58,17 @@ define Package/uhttpd-mod-tls/description
endef
define Package/uhttpd-mod-tls/config
choice
depends on PACKAGE_uhttpd-mod-tls
prompt "TLS Provider"
default PACKAGE_uhttpd-mod-tls_cyassl
choice
depends on PACKAGE_uhttpd-mod-tls
prompt "TLS Provider"
default PACKAGE_uhttpd-mod-tls_cyassl
config PACKAGE_uhttpd-mod-tls_cyassl
bool "CyaSSL"
config PACKAGE_uhttpd-mod-tls_cyassl
bool "CyaSSL"
config PACKAGE_uhttpd-mod-tls_openssl
bool "OpenSSL"
endchoice
config PACKAGE_uhttpd-mod-tls_openssl
bool "OpenSSL"
endchoice
endef
UHTTPD_TLS:=
@ -91,12 +99,25 @@ define Package/uhttpd-mod-lua/description
endef
TARGET_CFLAGS += $(TLS_CFLAGS)
TARGET_LDFLAGS += -Wl,-rpath-link=$(STAGING_DIR)/usr/lib
define Package/uhttpd-mod-ubus
$(Package/uhttpd/default)
TITLE+= (ubus plugin)
DEPENDS:=uhttpd +libubus +libblobmsg-json
endef
define Package/uhttpd-mod-ubus/description
The ubus plugin adds a HTTP/JSON RPC proxy for ubus and publishes the
session.* namespace and procedures.
endef
TARGET_CFLAGS += $(TLS_CFLAGS) $(if $(CONFIG_PACKAGE_uhttpd_debug),-DDEBUG) -ggdb3
TARGET_LDFLAGS += -lubox -Wl,-rpath-link=$(STAGING_DIR)/usr/lib
MAKE_VARS += \
FPIC="$(FPIC)" \
LUA_SUPPORT="$(if $(CONFIG_PACKAGE_uhttpd-mod-lua),1)" \
TLS_SUPPORT="$(if $(CONFIG_PACKAGE_uhttpd-mod-tls),1)" \
UBUS_SUPPORT="$(if $(CONFIG_PACKAGE_uhttpd-mod-ubus),1)" \
UHTTPD_TLS="$(UHTTPD_TLS)" \
TLS_CFLAGS="$(TLS_CFLAGS)" \
TLS_LDFLAGS="$(TLS_LDFLAGS)"
@ -131,7 +152,13 @@ define Package/uhttpd-mod-lua/install
$(INSTALL_BIN) $(PKG_BUILD_DIR)/uhttpd_lua.so $(1)/usr/lib/
endef
define Package/uhttpd-mod-ubus/install
$(INSTALL_DIR) $(1)/usr/lib
$(INSTALL_BIN) $(PKG_BUILD_DIR)/uhttpd_ubus.so $(1)/usr/lib/
endef
$(eval $(call BuildPackage,uhttpd))
$(eval $(call BuildPackage,uhttpd-mod-tls))
$(eval $(call BuildPackage,uhttpd-mod-lua))
$(eval $(call BuildPackage,uhttpd-mod-ubus))

7
package/uhttpd/files/uhttpd.config
View file

@ -17,6 +17,12 @@ config uhttpd main
# This is a DNS rebinding countermeasure.
option rfc1918_filter 1
# Maximum number of concurrent requests.
# If this number is exceeded, further requests are
# queued until the number of running requests drops
# below the limit again.
option max_requests 3
# Certificate and private key for HTTPS.
# If no listen_https addresses are given,
# the key options are ignored.
@ -81,4 +87,3 @@ config cert px5g
# Common name
option commonname OpenWrt

1
package/uhttpd/files/uhttpd.init
View file

@ -72,6 +72,7 @@ start_instance()
append_arg "$cfg" tcp_keepalive "-A"
append_arg "$cfg" error_page "-E"
append_arg "$cfg" index_page "-I"
append_arg "$cfg" max_requests "-n" 3
append_bool "$cfg" no_symlinks "-S" 0
append_bool "$cfg" no_dirlists "-D" 0

15
package/uhttpd/src/Makefile
View file

@ -41,6 +41,10 @@ ifeq ($(LUA_SUPPORT),1)
CFLAGS += -DHAVE_LUA
endif
ifeq ($(UBUS_SUPPORT),1)
CFLAGS += -DHAVE_UBUS
endif
world: compile
@ -66,10 +70,19 @@ ifeq ($(TLS_SUPPORT),1)
-o $(TLSLIB) uhttpd-tls.c
endif
ifeq ($(UBUS_SUPPORT),1)
UBUSLIB := uhttpd_ubus.so
$(UBUSLIB): uhttpd-ubus.c
$(CC) $(CFLAGS) $(LDFLAGS) $(FPIC) \
-shared -lubus -ljson -lblobmsg_json \
-o $(UBUSLIB) uhttpd-ubus.c
endif
%.o: %.c
$(CC) $(CFLAGS) -c -o $@ $<
compile: $(OBJ) $(TLSLIB) $(LUALIB)
compile: $(OBJ) $(TLSLIB) $(LUALIB) $(UBUSLIB)
$(CC) -o uhttpd $(LDFLAGS) $(OBJ) $(LIB)
clean:

838
package/uhttpd/src/uhttpd-cgi.c
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - CGI handler
*
* Copyright (C) 2010-2011 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -20,25 +20,24 @@
#include "uhttpd-utils.h"
#include "uhttpd-cgi.h"
static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off)
static bool
uh_cgi_header_parse(struct http_response *res, char *buf, int len, int *off)
{
char *bufptr = NULL;
char *hdrname = NULL;
int hdrcount = 0;
int pos = 0;
static struct http_response res;
if (((bufptr = strfind(buf, len, "\r\n\r\n", 4)) != NULL) ||
((bufptr = strfind(buf, len, "\n\n", 2)) != NULL))
{
*off = (int)(bufptr - buf) + ((bufptr[0] == '\r') ? 4 : 2);
memset(&res, 0, sizeof(res));
memset(res, 0, sizeof(*res));
res.statuscode = 200;
res.statusmsg = "OK";
res->statuscode = 200;
res->statusmsg = "OK";
bufptr = &buf[0];
@ -70,25 +69,30 @@ static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off)
if (pos <= len)
{
if ((hdrcount + 1) < array_size(res.headers))
if ((hdrcount+1) < array_size(res->headers))
{
if (!strcasecmp(hdrname, "Status"))
{
res.statuscode = atoi(bufptr);
res->statuscode = atoi(bufptr);
if (res.statuscode < 100)
res.statuscode = 200;
if (res->statuscode < 100)
res->statuscode = 200;
if (((bufptr = strchr(bufptr, ' ')) != NULL) &&
(&bufptr[1] != 0))
{
res.statusmsg = &bufptr[1];
res->statusmsg = &bufptr[1];
}
D("CGI: HTTP/1.x %03d %s\n",
res->statuscode, res->statusmsg);
}
else
{
res.headers[hdrcount++] = hdrname;
res.headers[hdrcount++] = bufptr;
D("CGI: HTTP: %s: %s\n", hdrname, bufptr);
res->headers[hdrcount++] = hdrname;
res->headers[hdrcount++] = bufptr;
}
bufptr = &buf[pos];
@ -96,16 +100,16 @@ static struct http_response * uh_cgi_header_parse(char *buf, int len, int *off)
}
else
{
return NULL;
return false;
}
}
}
}
return &res;
return true;
}
return NULL;
return false;
}
static char * uh_cgi_header_lookup(struct http_response *res,
@ -122,485 +126,443 @@ static char * uh_cgi_header_lookup(struct http_response *res,
return NULL;
}
static int uh_cgi_error_500(struct client *cl, struct http_request *req,
const char *message)
static void uh_cgi_shutdown(struct uh_cgi_state *state)
{
if (uh_http_sendf(cl, NULL,
"HTTP/%.1f 500 Internal Server Error\r\n"
"Content-Type: text/plain\r\n%s\r\n",
req->version,
(req->version > 1.0)
? "Transfer-Encoding: chunked\r\n" : "") >= 0)
{
return uh_http_send(cl, req, message, -1);
}
return -1;
close(state->rfd);
close(state->wfd);
free(state);
}
void uh_cgi_request(struct client *cl, struct http_request *req,
struct path_info *pi, struct interpreter *ip)
static bool uh_cgi_socket_cb(struct client *cl)
{
int i, hdroff, bufoff, rv;
int hdrlen = 0;
int buflen = 0;
int fd_max = 0;
int content_length = 0;
int header_sent = 0;
int i, len, hdroff;
char buf[UH_LIMIT_MSGHEAD];
struct uh_cgi_state *state = (struct uh_cgi_state *)cl->priv;
struct http_response *res = &state->cl->response;
struct http_request *req = &state->cl->request;
/* there is unread post data waiting */
while (state->content_length > 0)
{
/* remaining data in http head buffer ... */
if (state->cl->httpbuf.len > 0)
{
len = min(state->content_length, state->cl->httpbuf.len);
D("CGI: Child(%d) feed %d HTTP buffer bytes\n",
state->cl->proc.pid, len);
memcpy(buf, state->cl->httpbuf.ptr, len);
state->cl->httpbuf.len -= len;
state->cl->httpbuf.ptr +=len;
}
/* read it from socket ... */
else
{
len = uh_tcp_recv(state->cl, buf,
min(state->content_length, sizeof(buf)));
if ((len < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
break;
D("CGI: Child(%d) feed %d/%d TCP socket bytes\n",
state->cl->proc.pid, len,
min(state->content_length, sizeof(buf)));
}
if (len)
state->content_length -= len;
else
state->content_length = 0;
/* ... write to CGI process */
len = uh_raw_send(state->wfd, buf, len,
cl->server->conf->script_timeout);
}
/* try to read data from child */
while ((len = uh_raw_recv(state->rfd, buf, sizeof(buf), -1)) > 0)
{
/* we have not pushed out headers yet, parse input */
if (!state->header_sent)
{
/* try to parse header ... */
memcpy(state->httpbuf, buf, len);
if (uh_cgi_header_parse(res, state->httpbuf, len, &hdroff))
{
/* write status */
ensure_out(uh_http_sendf(state->cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode, res->statusmsg));
/* add Content-Type if no Location or Content-Type */
if (!uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type"))
{
ensure_out(uh_http_send(state->cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
/* if request was HTTP 1.1 we'll respond chunked */
if ((req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding"))
{
ensure_out(uh_http_send(state->cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
ensure_out(uh_http_sendf(state->cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
ensure_out(uh_http_send(state->cl, NULL, "\r\n", -1));
state->header_sent = true;
/* push out remaining head buffer */
if (hdroff < len)
{
D("CGI: Child(%d) relaying %d rest bytes\n",
state->cl->proc.pid, len - hdroff);
ensure_out(uh_http_send(state->cl, req,
&buf[hdroff], len - hdroff));
}
}
/* ... failed and head buffer exceeded */
else
{
/* I would do this ...
*
* uh_cgi_error_500(cl, req,
* "The CGI program generated an "
* "invalid response:\n\n");
*
* ... but in order to stay as compatible as possible,
* treat whatever we got as text/plain response and
* build the required headers here.
*/
ensure_out(uh_http_sendf(state->cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
req->version, (req->version > 1.0)
? "Transfer-Encoding: chunked\r\n" : ""
));
state->header_sent = true;
D("CGI: Child(%d) relaying %d invalid bytes\n",
state->cl->proc.pid, len);
ensure_out(uh_http_send(state->cl, req, buf, len));
}
}
else
{
/* headers complete, pass through buffer to socket */
D("CGI: Child(%d) relaying %d normal bytes\n",
state->cl->proc.pid, len);
ensure_out(uh_http_send(state->cl, req, buf, len));
}
}
/* child has been marked dead by timeout or child handler, bail out */
if (false && cl->dead)
{
D("CGI: Child(%d) is marked dead, returning\n", state->cl->proc.pid);
goto out;
}
if ((len == 0) ||
((errno != EAGAIN) && (errno != EWOULDBLOCK) && (len == -1)))
{
D("CGI: Child(%d) presumed dead [%s]\n",
state->cl->proc.pid, strerror(errno));
goto out;
}
return true;
out:
if (!state->header_sent)
{
if (state->cl->timeout.pending)
uh_http_sendhf(state->cl, 502, "Bad Gateway",
"The CGI process did not produce any response\n");
else
uh_http_sendhf(state->cl, 504, "Gateway Timeout",
"The CGI process took too long to produce a "
"response\n");
}
else
{
uh_http_send(state->cl, req, "", 0);
}
uh_cgi_shutdown(state);
return false;
}
bool uh_cgi_request(struct client *cl, struct path_info *pi,
struct interpreter *ip)
{
int i;
int rfd[2] = { 0, 0 };
int wfd[2] = { 0, 0 };
char buf[UH_LIMIT_MSGHEAD];
char hdr[UH_LIMIT_MSGHEAD];
pid_t child;
fd_set reader;
fd_set writer;
sigset_t ss;
struct sigaction sa;
struct timeval timeout;
struct http_response *res;
struct uh_cgi_state *state;
struct http_request *req = &cl->request;
/* allocate state */
if (!(state = malloc(sizeof(*state))))
{
uh_http_sendhf(cl, 500, "Internal Server Error", "Out of memory");
return false;
}
/* spawn pipes for me->child, child->me */
if ((pipe(rfd) < 0) || (pipe(wfd) < 0))
{
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to create pipe: %s", strerror(errno));
if (rfd[0] > 0) close(rfd[0]);
if (rfd[1] > 0) close(rfd[1]);
if (wfd[0] > 0) close(wfd[0]);
if (wfd[1] > 0) close(wfd[1]);
return;
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to create pipe: %s\n", strerror(errno));
return false;
}
/* fork off child process */
switch ((child = fork()))
{
/* oops */
case -1:
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to fork child: %s", strerror(errno));
return;
/* oops */
case -1:
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to fork child: %s\n", strerror(errno));
/* exec child */
case 0:
/* unblock signals */
sigemptyset(&ss);
sigprocmask(SIG_SETMASK, &ss, NULL);
return false;
/* restore SIGTERM */
sa.sa_flags = 0;
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
sigaction(SIGTERM, &sa, NULL);
/* close loose pipe ends */
close(rfd[0]);
close(wfd[1]);
/* patch stdout and stdin to pipes */
dup2(rfd[1], 1);
dup2(wfd[0], 0);
/* avoid leaking our pipe into child-child processes */
fd_cloexec(rfd[1]);
fd_cloexec(wfd[0]);
/* check for regular, world-executable file _or_ interpreter */
if (((pi->stat.st_mode & S_IFREG) &&
(pi->stat.st_mode & S_IXOTH)) || (ip != NULL))
{
/* build environment */
clearenv();
/* common information */
setenv("GATEWAY_INTERFACE", "CGI/1.1", 1);
setenv("SERVER_SOFTWARE", "uHTTPd", 1);
setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1);
#ifdef HAVE_TLS
/* https? */
if (cl->tls)
setenv("HTTPS", "on", 1);
/* exec child */
case 0:
#ifdef DEBUG
sleep(atoi(getenv("UHTTPD_SLEEP_ON_FORK") ?: "0"));
#endif
/* addresses */
setenv("SERVER_NAME", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_ADDR", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_PORT", sa_strport(&cl->servaddr), 1);
setenv("REMOTE_HOST", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_ADDR", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_PORT", sa_strport(&cl->peeraddr), 1);
/* close loose pipe ends */
close(rfd[0]);
close(wfd[1]);
/* path information */
setenv("SCRIPT_NAME", pi->name, 1);
setenv("SCRIPT_FILENAME", pi->phys, 1);
setenv("DOCUMENT_ROOT", pi->root, 1);
setenv("QUERY_STRING", pi->query ? pi->query : "", 1);
/* patch stdout and stdin to pipes */
dup2(rfd[1], 1);
dup2(wfd[0], 0);
if (pi->info)
setenv("PATH_INFO", pi->info, 1);
/* avoid leaking our pipe into child-child processes */
fd_cloexec(rfd[1]);
fd_cloexec(wfd[0]);
/* REDIRECT_STATUS, php-cgi wants it */
switch (req->redirect_status)
{
case 404:
setenv("REDIRECT_STATUS", "404", 1);
break;
/* check for regular, world-executable file _or_ interpreter */
if (((pi->stat.st_mode & S_IFREG) &&
(pi->stat.st_mode & S_IXOTH)) || (ip != NULL))
{
/* build environment */
clearenv();
default:
setenv("REDIRECT_STATUS", "200", 1);
break;
}
/* common information */
setenv("GATEWAY_INTERFACE", "CGI/1.1", 1);
setenv("SERVER_SOFTWARE", "uHTTPd", 1);
setenv("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1);
/* http version */
if (req->version > 1.0)
setenv("SERVER_PROTOCOL", "HTTP/1.1", 1);
else
setenv("SERVER_PROTOCOL", "HTTP/1.0", 1);
#ifdef HAVE_TLS
/* https? */
if (cl->tls)
setenv("HTTPS", "on", 1);
#endif
/* request method */
switch (req->method)
{
case UH_HTTP_MSG_GET:
setenv("REQUEST_METHOD", "GET", 1);
break;
/* addresses */
setenv("SERVER_NAME", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_ADDR", sa_straddr(&cl->servaddr), 1);
setenv("SERVER_PORT", sa_strport(&cl->servaddr), 1);
setenv("REMOTE_HOST", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_ADDR", sa_straddr(&cl->peeraddr), 1);
setenv("REMOTE_PORT", sa_strport(&cl->peeraddr), 1);
case UH_HTTP_MSG_HEAD:
setenv("REQUEST_METHOD", "HEAD", 1);
break;
/* path information */
setenv("SCRIPT_NAME", pi->name, 1);
setenv("SCRIPT_FILENAME", pi->phys, 1);
setenv("DOCUMENT_ROOT", pi->root, 1);
setenv("QUERY_STRING", pi->query ? pi->query : "", 1);
case UH_HTTP_MSG_POST:
setenv("REQUEST_METHOD", "POST", 1);
break;
}
if (pi->info)
setenv("PATH_INFO", pi->info, 1);
/* request url */
setenv("REQUEST_URI", req->url, 1);
/* REDIRECT_STATUS, php-cgi wants it */
switch (req->redirect_status)
{
case 404:
setenv("REDIRECT_STATUS", "404", 1);
break;
/* remote user */
if (req->realm)
setenv("REMOTE_USER", req->realm->user, 1);
/* request message headers */
foreach_header(i, req->headers)
{
if (!strcasecmp(req->headers[i], "Accept"))
setenv("HTTP_ACCEPT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Charset"))
setenv("HTTP_ACCEPT_CHARSET", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Encoding"))
setenv("HTTP_ACCEPT_ENCODING", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Language"))
setenv("HTTP_ACCEPT_LANGUAGE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Authorization"))
setenv("HTTP_AUTHORIZATION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Connection"))
setenv("HTTP_CONNECTION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Cookie"))
setenv("HTTP_COOKIE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Host"))
setenv("HTTP_HOST", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Referer"))
setenv("HTTP_REFERER", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "User-Agent"))
setenv("HTTP_USER_AGENT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Type"))
setenv("CONTENT_TYPE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Length"))
setenv("CONTENT_LENGTH", req->headers[i+1], 1);
}
/* execute child code ... */
if (chdir(pi->root))
perror("chdir()");
if (ip != NULL)
execl(ip->path, ip->path, pi->phys, NULL);
else
execl(pi->phys, pi->phys, NULL);
/* in case it fails ... */
printf("Status: 500 Internal Server Error\r\n\r\n"
"Unable to launch the requested CGI program:\n"
" %s: %s\n",
ip ? ip->path : pi->phys, strerror(errno));
default:
setenv("REDIRECT_STATUS", "200", 1);
break;
}
/* 403 */
/* http version */
if (req->version > 1.0)
setenv("SERVER_PROTOCOL", "HTTP/1.1", 1);
else
setenv("SERVER_PROTOCOL", "HTTP/1.0", 1);
/* request method */
switch (req->method)
{
printf("Status: 403 Forbidden\r\n\r\n"
"Access to this resource is forbidden\n");
case UH_HTTP_MSG_GET:
setenv("REQUEST_METHOD", "GET", 1);
break;
case UH_HTTP_MSG_HEAD:
setenv("REQUEST_METHOD", "HEAD", 1);
break;
case UH_HTTP_MSG_POST:
setenv("REQUEST_METHOD", "POST", 1);
break;
}
close(wfd[0]);
close(rfd[1]);
exit(0);
/* request url */
setenv("REQUEST_URI", req->url, 1);
break;
/* remote user */
if (req->realm)
setenv("REMOTE_USER", req->realm->user, 1);
/* parent; handle I/O relaying */
default:
/* close unneeded pipe ends */
close(rfd[1]);
close(wfd[0]);
/* max watch fd */
fd_max = max(rfd[0], wfd[1]) + 1;
/* find content length */
if (req->method == UH_HTTP_MSG_POST)
/* request message headers */
foreach_header(i, req->headers)
{
foreach_header(i, req->headers)
{
if (!strcasecmp(req->headers[i], "Content-Length"))
{
content_length = atoi(req->headers[i+1]);
break;
}
}
if (!strcasecmp(req->headers[i], "Accept"))
setenv("HTTP_ACCEPT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Charset"))
setenv("HTTP_ACCEPT_CHARSET", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Encoding"))
setenv("HTTP_ACCEPT_ENCODING", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Accept-Language"))
setenv("HTTP_ACCEPT_LANGUAGE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Authorization"))
setenv("HTTP_AUTHORIZATION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Connection"))
setenv("HTTP_CONNECTION", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Cookie"))
setenv("HTTP_COOKIE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Host"))
setenv("HTTP_HOST", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Referer"))
setenv("HTTP_REFERER", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "User-Agent"))
setenv("HTTP_USER_AGENT", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Type"))
setenv("CONTENT_TYPE", req->headers[i+1], 1);
else if (!strcasecmp(req->headers[i], "Content-Length"))
setenv("CONTENT_LENGTH", req->headers[i+1], 1);
}
memset(hdr, 0, sizeof(hdr));
/* execute child code ... */
if (chdir(pi->root))
perror("chdir()");
/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
while (1)
if (ip != NULL)
execl(ip->path, ip->path, pi->phys, NULL);
else
execl(pi->phys, pi->phys, NULL);
/* in case it fails ... */
printf("Status: 500 Internal Server Error\r\n\r\n"
"Unable to launch the requested CGI program:\n"
" %s: %s\n", ip ? ip->path : pi->phys, strerror(errno));
}
/* 403 */
else
{
printf("Status: 403 Forbidden\r\n\r\n"
"Access to this resource is forbidden\n");
}
close(wfd[0]);
close(rfd[1]);
exit(0);
break;
/* parent; handle I/O relaying */
default:
memset(state, 0, sizeof(*state));
state->cl = cl;
state->cl->proc.pid = child;
/* close unneeded pipe ends */
close(rfd[1]);
close(wfd[0]);
D("CGI: Child(%d) created: rfd(%d) wfd(%d)\n", child, rfd[0], wfd[1]);
state->content_length = cl->httpbuf.len;
/* find content length */
if (req->method == UH_HTTP_MSG_POST)
{
foreach_header(i, req->headers)
{
FD_ZERO(&reader);
FD_ZERO(&writer);
FD_SET(rfd[0], &reader);
FD_SET(wfd[1], &writer);
timeout.tv_sec = (header_sent < 1) ? cl->server->conf->script_timeout : 3;
timeout.tv_usec = 0;
ensure_out(rv = select_intr(fd_max, &reader,
(content_length > -1)
? &writer : NULL,
NULL, &timeout));
/* timeout */
if (rv == 0)
if (!strcasecmp(req->headers[i], "Content-Length"))
{
ensure_out(kill(child, 0));
}
/* wait until we can read or write or both */
else if (rv > 0)
{
/* ready to write to cgi program */
if (FD_ISSET(wfd[1], &writer))
{
/* there is unread post data waiting */
if (content_length > 0)
{
/* read it from socket ... */
ensure_out(buflen = uh_tcp_recv(cl, buf,
min(content_length, sizeof(buf))));
if (buflen > 0)
{
/* ... and write it to child's stdin */
if (write(wfd[1], buf, buflen) < 0)
perror("write()");
content_length -= buflen;
}
/* unexpected eof! */
else
{
if (write(wfd[1], "", 0) < 0)
perror("write()");
content_length = 0;
}
}
/* there is no more post data, close pipe to child's stdin */
else if (content_length > -1)
{
close(wfd[1]);
content_length = -1;
}
}
/* ready to read from cgi program */
if (FD_ISSET(rfd[0], &reader))
{
/* read data from child ... */
if ((buflen = read(rfd[0], buf, sizeof(buf))) > 0)
{
/* we have not pushed out headers yet, parse input */
if (!header_sent)
{
/* head buffer not full and no end yet */
if (hdrlen < sizeof(hdr))
{
bufoff = min(buflen, sizeof(hdr) - hdrlen);
memcpy(&hdr[hdrlen], buf, bufoff);
hdrlen += bufoff;
}
else
{
bufoff = 0;
}
/* try to parse header ... */
if ((res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL)
{
/* write status */
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f %03d %s\r\n"
"Connection: close\r\n",
req->version, res->statuscode,
res->statusmsg));
/* add Content-Type if no Location or Content-Type */
if( !uh_cgi_header_lookup(res, "Location") &&
!uh_cgi_header_lookup(res, "Content-Type")
) {
ensure_out(uh_http_send(cl, NULL,
"Content-Type: text/plain\r\n", -1));
}
/* if request was HTTP 1.1 we'll respond chunked */
if( (req->version > 1.0) &&
!uh_cgi_header_lookup(res, "Transfer-Encoding")
) {
ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* write headers from CGI program */
foreach_header(i, res->headers)
{
ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n",
res->headers[i], res->headers[i+1]));
}
/* terminate header */
ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
/* push out remaining head buffer */
if (hdroff < hdrlen)
ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
}
/* ... failed and head buffer exceeded */
else if (hdrlen >= sizeof(hdr))
{
ensure_out(uh_cgi_error_500(cl, req,
"The CGI program generated an invalid response:\n\n"));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* ... failed but free buffer space, try again */
else
{
continue;
}
/* push out remaining read buffer */
if (bufoff < buflen)
ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
header_sent = 1;
continue;
}
/* headers complete, pass through buffer to socket */
ensure_out(uh_http_send(cl, req, buf, buflen));
}
/* looks like eof from child */
else
{
/* cgi script did not output useful stuff at all */
if (!header_sent)
{
/* I would do this ...
*
* uh_cgi_error_500(cl, req,
* "The CGI program generated an "
* "invalid response:\n\n");
*
* ... but in order to stay as compatible as possible,
* treat whatever we got as text/plain response and
* build the required headers here.
*/
ensure_out(uh_http_sendf(cl, NULL,
"HTTP/%.1f 200 OK\r\n"
"Content-Type: text/plain\r\n"
"%s\r\n",
req->version, (req->version > 1.0)
? "Transfer-Encoding: chunked\r\n" : ""
));
ensure_out(uh_http_send(cl, req, hdr, hdrlen));
}
/* send final chunk if we're in chunked transfer mode */
ensure_out(uh_http_send(cl, req, "", 0));
break;
}
}
}
/* timeout exceeded or interrupted by SIGCHLD */
else
{
if ((errno != EINTR) && ! header_sent)
{
ensure_out(uh_http_sendhf(cl, 504, "Gateway Timeout",
"The CGI script took too long to produce "
"a response"));
}
/* send final chunk if we're in chunked transfer mode */
ensure_out(uh_http_send(cl, req, "", 0));
state->content_length = atoi(req->headers[i+1]);
break;
}
}
}
out:
close(rfd[0]);
close(wfd[1]);
state->rfd = rfd[0];
fd_nonblock(state->rfd);
if (!kill(child, 0))
{
kill(child, SIGTERM);
waitpid(child, NULL, 0);
}
state->wfd = wfd[1];
fd_nonblock(state->wfd);
break;
cl->cb = uh_cgi_socket_cb;
cl->priv = state;
break;
}
return true;
}

20
package/uhttpd/src/uhttpd-cgi.h
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - CGI header
*
* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -24,9 +24,19 @@
#include <sys/types.h>
#include <linux/limits.h>
void uh_cgi_request(
struct client *cl, struct http_request *req,
struct path_info *pi, struct interpreter *ip
);
#include <time.h>
struct uh_cgi_state {
int rfd;
int wfd;
struct client *cl;
char httpbuf[UH_LIMIT_MSGHEAD];
int content_length;
bool header_sent;
};
bool uh_cgi_request(struct client *cl, struct path_info *pi,
struct interpreter *ip);
#endif

143
package/uhttpd/src/uhttpd-file.c
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - Static file handler
*
* Copyright (C) 2010-2011 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -83,22 +83,21 @@ static char * uh_file_unix2date(time_t ts)
return str;
}
static char * uh_file_header_lookup(struct http_request *req, const char *name)
static char * uh_file_header_lookup(struct client *cl, const char *name)
{
int i;
foreach_header(i, req->headers)
foreach_header(i, cl->request.headers)
{
if (!strcasecmp(req->headers[i], name))
return req->headers[i+1];
if (!strcasecmp(cl->request.headers[i], name))
return cl->request.headers[i+1];
}
return NULL;
}
static int uh_file_response_ok_hdrs(struct client *cl, struct http_request *req,
struct stat *s)
static int uh_file_response_ok_hdrs(struct client *cl, struct stat *s)
{
ensure_ret(uh_http_sendf(cl, NULL, "Connection: close\r\n"));
@ -112,32 +111,33 @@ static int uh_file_response_ok_hdrs(struct client *cl, struct http_request *req,
return uh_http_sendf(cl, NULL, "Date: %s\r\n", uh_file_unix2date(time(NULL)));
}
static int uh_file_response_200(struct client *cl, struct http_request *req,
struct stat *s)
static int uh_file_response_200(struct client *cl, struct stat *s)
{
ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 200 OK\r\n", req->version));
return uh_file_response_ok_hdrs(cl, req, s);
ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 200 OK\r\n",
cl->request.version));
return uh_file_response_ok_hdrs(cl, s);
}
static int uh_file_response_304(struct client *cl, struct http_request *req,
struct stat *s)
static int uh_file_response_304(struct client *cl, struct stat *s)
{
ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 304 Not Modified\r\n", req->version));
return uh_file_response_ok_hdrs(cl, req, s);
ensure_ret(uh_http_sendf(cl, NULL, "HTTP/%.1f 304 Not Modified\r\n",
cl->request.version));
return uh_file_response_ok_hdrs(cl, s);
}
static int uh_file_response_412(struct client *cl, struct http_request *req)
static int uh_file_response_412(struct client *cl)
{
return uh_http_sendf(cl, NULL,
"HTTP/%.1f 412 Precondition Failed\r\n"
"Connection: close\r\n", req->version);
"HTTP/%.1f 412 Precondition Failed\r\n"
"Connection: close\r\n", cl->request.version);
}
static int uh_file_if_match(struct client *cl, struct http_request *req,
struct stat *s, int *ok)
static int uh_file_if_match(struct client *cl, struct stat *s, int *ok)
{
const char *tag = uh_file_mktag(s);
char *hdr = uh_file_header_lookup(req, "If-Match");
char *hdr = uh_file_header_lookup(cl, "If-Match");
char *p;
int i;
@ -160,7 +160,7 @@ static int uh_file_if_match(struct client *cl, struct http_request *req,
}
*ok = 0;
ensure_ret(uh_file_response_412(cl, req));
ensure_ret(uh_file_response_412(cl));
return *ok;
}
@ -168,11 +168,9 @@ static int uh_file_if_match(struct client *cl, struct http_request *req,
return *ok;
}
static int uh_file_if_modified_since(struct client *cl,
struct http_request *req, struct stat *s,
int *ok)
static int uh_file_if_modified_since(struct client *cl, struct stat *s, int *ok)
{
char *hdr = uh_file_header_lookup(req, "If-Modified-Since");
char *hdr = uh_file_header_lookup(cl, "If-Modified-Since");
*ok = 1;
if (hdr)
@ -180,18 +178,17 @@ static int uh_file_if_modified_since(struct client *cl,
if (uh_file_date2unix(hdr) >= s->st_mtime)
{
*ok = 0;
ensure_ret(uh_file_response_304(cl, req, s));
ensure_ret(uh_file_response_304(cl, s));
}
}
return *ok;
}
static int uh_file_if_none_match(struct client *cl, struct http_request *req,
struct stat *s, int *ok)
static int uh_file_if_none_match(struct client *cl, struct stat *s, int *ok)
{
const char *tag = uh_file_mktag(s);
char *hdr = uh_file_header_lookup(req, "If-None-Match");
char *hdr = uh_file_header_lookup(cl, "If-None-Match");
char *p;
int i;
*ok = 1;
@ -211,14 +208,14 @@ static int uh_file_if_none_match(struct client *cl, struct http_request *req,
{
*ok = 0;
if ((req->method == UH_HTTP_MSG_GET) ||
(req->method == UH_HTTP_MSG_HEAD))
if ((cl->request.method == UH_HTTP_MSG_GET) ||
(cl->request.method == UH_HTTP_MSG_HEAD))
{
ensure_ret(uh_file_response_304(cl, req, s));
ensure_ret(uh_file_response_304(cl, s));
}
else
{
ensure_ret(uh_file_response_412(cl, req));
ensure_ret(uh_file_response_412(cl));
}
break;
@ -229,26 +226,24 @@ static int uh_file_if_none_match(struct client *cl, struct http_request *req,
return *ok;
}
static int uh_file_if_range(struct client *cl, struct http_request *req,
struct stat *s, int *ok)
static int uh_file_if_range(struct client *cl, struct stat *s, int *ok)
{
char *hdr = uh_file_header_lookup(req, "If-Range");
char *hdr = uh_file_header_lookup(cl, "If-Range");
*ok = 1;
if (hdr)
{
*ok = 0;
ensure_ret(uh_file_response_412(cl, req));
ensure_ret(uh_file_response_412(cl));
}
return *ok;
}
static int uh_file_if_unmodified_since(struct client *cl,
struct http_request *req, struct stat *s,
static int uh_file_if_unmodified_since(struct client *cl, struct stat *s,
int *ok)
{
char *hdr = uh_file_header_lookup(req, "If-Unmodified-Since");
char *hdr = uh_file_header_lookup(cl, "If-Unmodified-Since");
*ok = 1;
if (hdr)
@ -256,7 +251,7 @@ static int uh_file_if_unmodified_since(struct client *cl,
if (uh_file_date2unix(hdr) <= s->st_mtime)
{
*ok = 0;
ensure_ret(uh_file_response_412(cl, req));
ensure_ret(uh_file_response_412(cl));
}
}
@ -269,8 +264,7 @@ static int uh_file_scandir_filter_dir(const struct dirent *e)
return strcmp(e->d_name, ".") ? 1 : 0;
}
static void uh_file_dirlist(struct client *cl, struct http_request *req,
struct path_info *pi)
static void uh_file_dirlist(struct client *cl, struct path_info *pi)
{
int i;
int count = 0;
@ -279,7 +273,7 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req,
struct dirent **files = NULL;
struct stat s;
ensure_out(uh_http_sendf(cl, req,
ensure_out(uh_http_sendf(cl, &cl->request,
"<html><head><title>Index of %s</title></head>"
"<body><h1>Index of %s</h1><hr /><ol>",
pi->name, pi->name));
@ -300,7 +294,7 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req,
if (!stat(filename, &s) &&
(s.st_mode & S_IFDIR) && (s.st_mode & S_IXOTH))
{
ensure_out(uh_http_sendf(cl, req,
ensure_out(uh_http_sendf(cl, &cl->request,
"<li><strong><a href='%s%s'>%s</a>/"
"</strong><br /><small>modified: %s"
"<br />directory - %.02f kbyte<br />"
@ -323,7 +317,7 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req,
if (!stat(filename, &s) &&
!(s.st_mode & S_IFDIR) && (s.st_mode & S_IROTH))
{
ensure_out(uh_http_sendf(cl, req,
ensure_out(uh_http_sendf(cl, &cl->request,
"<li><strong><a href='%s%s'>%s</a>"
"</strong><br /><small>modified: %s"
"<br />%s - %.02f kbyte<br />"
@ -339,8 +333,8 @@ static void uh_file_dirlist(struct client *cl, struct http_request *req,
}
}
ensure_out(uh_http_sendf(cl, req, "</ol><hr /></body></html>"));
ensure_out(uh_http_sendf(cl, req, ""));
ensure_out(uh_http_sendf(cl, &cl->request, "</ol><hr /></body></html>"));
ensure_out(uh_http_sendf(cl, &cl->request, ""));
out:
if (files)
@ -353,7 +347,7 @@ out:
}
void uh_file_request(struct client *cl, struct http_request *req, struct path_info *pi)
bool uh_file_request(struct client *cl, struct path_info *pi)
{
int rlen;
int ok = 1;
@ -364,36 +358,43 @@ void uh_file_request(struct client *cl, struct http_request *req, struct path_in
if ((pi->stat.st_mode & S_IFREG) && ((fd = open(pi->phys, O_RDONLY)) > 0))
{
/* test preconditions */
if (ok) ensure_out(uh_file_if_modified_since(cl, req, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_match(cl, req, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_range(cl, req, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_unmodified_since(cl, req, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_none_match(cl, req, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_modified_since(cl, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_match(cl, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_range(cl, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_unmodified_since(cl, &pi->stat, &ok));
if (ok) ensure_out(uh_file_if_none_match(cl, &pi->stat, &ok));
if (ok > 0)
{
/* write status */
ensure_out(uh_file_response_200(cl, req, &pi->stat));
ensure_out(uh_file_response_200(cl, &pi->stat));
ensure_out(uh_http_sendf(cl, NULL, "Content-Type: %s\r\n", uh_file_mime_lookup(pi->name)));
ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n", pi->stat.st_size));
ensure_out(uh_http_sendf(cl, NULL, "Content-Type: %s\r\n",
uh_file_mime_lookup(pi->name)));
ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n",
pi->stat.st_size));
/* if request was HTTP 1.1 we'll respond chunked */
if ((req->version > 1.0) && (req->method != UH_HTTP_MSG_HEAD))
ensure_out(uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1));
if ((cl->request.version > 1.0) &&
(cl->request.method != UH_HTTP_MSG_HEAD))
{
ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
}
/* close header */
ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
/* send body */
if (req->method != UH_HTTP_MSG_HEAD)
if (cl->request.method != UH_HTTP_MSG_HEAD)
{
/* pump file data */
while ((rlen = read(fd, buf, sizeof(buf))) > 0)
ensure_out(uh_http_send(cl, req, buf, rlen));
ensure_out(uh_http_send(cl, &cl->request, buf, rlen));
/* send trailer in chunked mode */
ensure_out(uh_http_send(cl, req, "", 0));
ensure_out(uh_http_send(cl, &cl->request, "", 0));
}
}
@ -408,25 +409,29 @@ void uh_file_request(struct client *cl, struct http_request *req, struct path_in
else if ((pi->stat.st_mode & S_IFDIR) && !cl->server->conf->no_dirlists)
{
/* write status */
ensure_out(uh_file_response_200(cl, req, NULL));
ensure_out(uh_file_response_200(cl, NULL));
if (req->version > 1.0)
ensure_out(uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1));
if (cl->request.version > 1.0)
ensure_out(uh_http_send(cl, NULL,
"Transfer-Encoding: chunked\r\n", -1));
ensure_out(uh_http_send(cl, NULL, "Content-Type: text/html\r\n\r\n", -1));
ensure_out(uh_http_send(cl, NULL,
"Content-Type: text/html\r\n\r\n", -1));
/* content */
uh_file_dirlist(cl, req, pi);
uh_file_dirlist(cl, pi);
}
/* 403 */
else
{
ensure_out(uh_http_sendhf(cl, 403, "Forbidden",
"Access to this resource is forbidden"));
"Access to this resource is forbidden"));
}
out:
if (fd > -1)
close(fd);
return false;
}

4
package/uhttpd/src/uhttpd-file.h
View file

@ -31,8 +31,6 @@ struct mimetype {
const char *mime;
};
void uh_file_request(
struct client *cl, struct http_request *req, struct path_info *pi
);
bool uh_file_request(struct client *cl, struct path_info *pi);
#endif

662
package/uhttpd/src/uhttpd-lua.c
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - Lua handler
*
* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -24,54 +24,59 @@
static int uh_lua_recv(lua_State *L)
{
size_t length;
char buffer[UH_LIMIT_MSGHEAD];
ssize_t rlen = 0;
fd_set reader;
struct timeval timeout;
int to = 1;
int fd = fileno(stdin);
int rlen = 0;
length = luaL_checknumber(L, 1);
if ((length > 0) && (length <= sizeof(buffer)))
{
FD_ZERO(&reader);
FD_SET(fileno(stdin), &reader);
/* receive data */
rlen = uh_raw_recv(fd, buffer, length, to);
/* fail after 0.1s */
timeout.tv_sec = 0;
timeout.tv_usec = 100000;
/* check whether fd is readable */
if (select(fileno(stdin) + 1, &reader, NULL, NULL, &timeout) > 0)
/* data read */
if (rlen > 0)
{
/* receive data */
rlen = read(fileno(stdin), buffer, length);
lua_pushnumber(L, rlen);
lua_pushlstring(L, buffer, rlen);
return 2;
}
if (rlen > 0)
{
lua_pushlstring(L, buffer, rlen);
return 2;
}
/* eof */
else if (rlen == 0)
{
lua_pushnumber(L, 0);
return 1;
}
/* no, timeout and actually no data */
lua_pushnumber(L, -2);
return 1;
else
{
lua_pushnumber(L, -1);
return 1;
}
}
/* parameter error */
lua_pushnumber(L, -3);
lua_pushnumber(L, -2);
return 1;
}
static int uh_lua_send_common(lua_State *L, int chunked)
{
size_t length;
const char *buffer;
char chunk[16];
ssize_t slen = 0;
const char *buffer;
int rv;
int to = 1;
int fd = fileno(stdout);
int slen = 0;
buffer = luaL_checklstring(L, 1, &length);
@ -80,20 +85,27 @@ static int uh_lua_send_common(lua_State *L, int chunked)
if (length > 0)
{
snprintf(chunk, sizeof(chunk), "%X\r\n", length);
slen = write(fileno(stdout), chunk, strlen(chunk));
slen += write(fileno(stdout), buffer, length);
slen += write(fileno(stdout), "\r\n", 2);
ensure_out(rv = uh_raw_send(fd, chunk, strlen(chunk), to));
slen += rv;
ensure_out(rv = uh_raw_send(fd, buffer, length, to));
slen += rv;
ensure_out(rv = uh_raw_send(fd, "\r\n", 2, to));
slen += rv;
}
else
{
slen = write(fileno(stdout), "0\r\n\r\n", 5);
slen = uh_raw_send(fd, "0\r\n\r\n", 5, to);
}
}
else
{
slen = write(fileno(stdout), buffer, length);
slen = uh_raw_send(fd, buffer, length, to);
}
out:
lua_pushnumber(L, slen);
return 1;
}
@ -118,8 +130,8 @@ static int uh_lua_str2str(lua_State *L, int (*xlate_func) (char *, int, const ch
inbuf = luaL_checklstring(L, 1, &inlen);
outlen = (* xlate_func)(outbuf, sizeof(outbuf), inbuf, inlen);
if (outlen < 0)
luaL_error( L, "%s on URL-encode codec",
(outlen==-1) ? "buffer overflow" : "malformed string" );
luaL_error(L, "%s on URL-encode codec",
(outlen==-1) ? "buffer overflow" : "malformed string");
lua_pushlstring(L, outbuf, outlen);
return 1;
@ -181,17 +193,17 @@ lua_State * uh_lua_init(const struct config *conf)
{
case LUA_ERRSYNTAX:
fprintf(stderr,
"Lua handler contains syntax errors, unable to continue\n");
"Lua handler contains syntax errors, unable to continue\n");
exit(1);
case LUA_ERRMEM:
fprintf(stderr,
"Lua handler ran out of memory, unable to continue\n");
"Lua handler ran out of memory, unable to continue\n");
exit(1);
case LUA_ERRFILE:
fprintf(stderr,
"Lua cannot open the handler script, unable to continue\n");
"Lua cannot open the handler script, unable to continue\n");
exit(1);
default:
@ -201,17 +213,17 @@ lua_State * uh_lua_init(const struct config *conf)
case LUA_ERRRUN:
err_str = luaL_checkstring(L, -1);
fprintf(stderr,
"Lua handler had runtime error, unable to continue\n"
"Error: %s\n", err_str
);
"Lua handler had runtime error, "
"unable to continue\n"
"Error: %s\n", err_str);
exit(1);
case LUA_ERRMEM:
err_str = luaL_checkstring(L, -1);
fprintf(stderr,
"Lua handler ran out of memory, unable to continue\n"
"Error: %s\n", err_str
);
"Lua handler ran out of memory, "
"unable to continue\n"
"Error: %s\n", err_str);
exit(1);
default:
@ -221,7 +233,8 @@ lua_State * uh_lua_init(const struct config *conf)
if (! lua_isfunction(L, -1))
{
fprintf(stderr,
"Lua handler provides no " UH_LUA_CALLBACK "(), unable to continue\n");
"Lua handler provides no "UH_LUA_CALLBACK"(), "
"unable to continue\n");
exit(1);
}
@ -235,12 +248,107 @@ lua_State * uh_lua_init(const struct config *conf)
return L;
}
void uh_lua_request(struct client *cl, struct http_request *req, lua_State *L)
static void uh_lua_shutdown(struct uh_lua_state *state)
{
int i, data_sent;
int content_length = 0;
int buflen = 0;
int fd_max = 0;
close(state->rfd);
close(state->wfd);
free(state);
}
static bool uh_lua_socket_cb(struct client *cl)
{
int len;
char buf[UH_LIMIT_MSGHEAD];
struct uh_lua_state *state = (struct uh_lua_state *)cl->priv;
/* there is unread post data waiting */
while (state->content_length > 0)
{
/* remaining data in http head buffer ... */
if (state->cl->httpbuf.len > 0)
{
len = min(state->content_length, state->cl->httpbuf.len);
D("Lua: Child(%d) feed %d HTTP buffer bytes\n",
state->cl->proc.pid, len);
memcpy(buf, state->cl->httpbuf.ptr, len);
state->cl->httpbuf.len -= len;
state->cl->httpbuf.ptr += len;
}
/* read it from socket ... */
else
{
len = uh_tcp_recv(state->cl, buf,
min(state->content_length, sizeof(buf)));
if ((len < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
break;
D("Lua: Child(%d) feed %d/%d TCP socket bytes\n",
state->cl->proc.pid, len,
min(state->content_length, sizeof(buf)));
}
if (len)
state->content_length -= len;
else
state->content_length = 0;
/* ... write to CGI process */
len = uh_raw_send(state->wfd, buf, len,
cl->server->conf->script_timeout);
}
/* try to read data from child */
while ((len = uh_raw_recv(state->rfd, buf, sizeof(buf), -1)) > 0)
{
/* pass through buffer to socket */
D("Lua: Child(%d) relaying %d normal bytes\n", state->cl->proc.pid, len);
ensure_out(uh_tcp_send(state->cl, buf, len));
state->data_sent = true;
}
/* child has been marked dead by timeout or child handler, bail out */
if (false && cl->dead)
{
D("Lua: Child(%d) is marked dead, returning\n", state->cl->proc.pid);
goto out;
}
if ((len == 0) ||
((errno != EAGAIN) && (errno != EWOULDBLOCK) && (len == -1)))
{
D("Lua: Child(%d) presumed dead [%s]\n",
state->cl->proc.pid, strerror(errno));
goto out;
}
return true;
out:
if (!state->data_sent)
{
if (state->cl->timeout.pending)
uh_http_sendhf(state->cl, 502, "Bad Gateway",
"The Lua process did not produce any response\n");
else
uh_http_sendhf(state->cl, 504, "Gateway Timeout",
"The Lua process took too long to produce a "
"response\n");
}
uh_lua_shutdown(state);
return false;
}
bool uh_lua_request(struct client *cl, lua_State *L)
{
int i;
char *query_string;
const char *prefix = cl->server->conf->lua_prefix;
const char *err_str = NULL;
@ -248,325 +356,243 @@ void uh_lua_request(struct client *cl, struct http_request *req, lua_State *L)
int rfd[2] = { 0, 0 };
int wfd[2] = { 0, 0 };
char buf[UH_LIMIT_MSGHEAD];
pid_t child;
fd_set reader;
fd_set writer;
struct uh_lua_state *state;
struct http_request *req = &cl->request;
struct sigaction sa;
struct timeval timeout;
int content_length = cl->httpbuf.len;
/* allocate state */
if (!(state = malloc(sizeof(*state))))
{
uh_client_error(cl, 500, "Internal Server Error", "Out of memory");
return false;
}
/* spawn pipes for me->child, child->me */
if ((pipe(rfd) < 0) || (pipe(wfd) < 0))
{
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to create pipe: %s", strerror(errno));
if (rfd[0] > 0) close(rfd[0]);
if (rfd[1] > 0) close(rfd[1]);
if (wfd[0] > 0) close(wfd[0]);
if (wfd[1] > 0) close(wfd[1]);
return;
uh_client_error(cl, 500, "Internal Server Error",
"Failed to create pipe: %s", strerror(errno));
return false;
}
switch ((child = fork()))
{
case -1:
uh_http_sendhf(cl, 500, "Internal Server Error",
"Failed to fork child: %s", strerror(errno));
break;
case -1:
uh_client_error(cl, 500, "Internal Server Error",
"Failed to fork child: %s", strerror(errno));
case 0:
/* restore SIGTERM */
sa.sa_flags = 0;
sa.sa_handler = SIG_DFL;
sigemptyset(&sa.sa_mask);
sigaction(SIGTERM, &sa, NULL);
return false;
/* close loose pipe ends */
close(rfd[0]);
close(wfd[1]);
case 0:
#ifdef DEBUG
sleep(atoi(getenv("UHTTPD_SLEEP_ON_FORK") ?: "0"));
#endif
/* patch stdout and stdin to pipes */
dup2(rfd[1], 1);
dup2(wfd[0], 0);
/* close loose pipe ends */
close(rfd[0]);
close(wfd[1]);
/* put handler callback on stack */
lua_getglobal(L, UH_LUA_CALLBACK);
/* patch stdout and stdin to pipes */
dup2(rfd[1], 1);
dup2(wfd[0], 0);
/* build env table */
lua_newtable(L);
/* avoid leaking our pipe into child-child processes */
fd_cloexec(rfd[1]);
fd_cloexec(wfd[0]);
/* request method */
switch(req->method)
/* put handler callback on stack */
lua_getglobal(L, UH_LUA_CALLBACK);
/* build env table */
lua_newtable(L);
/* request method */
switch(req->method)
{
case UH_HTTP_MSG_GET:
lua_pushstring(L, "GET");
break;
case UH_HTTP_MSG_HEAD:
lua_pushstring(L, "HEAD");
break;
case UH_HTTP_MSG_POST:
lua_pushstring(L, "POST");
break;
}
lua_setfield(L, -2, "REQUEST_METHOD");
/* request url */
lua_pushstring(L, req->url);
lua_setfield(L, -2, "REQUEST_URI");
/* script name */
lua_pushstring(L, cl->server->conf->lua_prefix);
lua_setfield(L, -2, "SCRIPT_NAME");
/* query string, path info */
if ((query_string = strchr(req->url, '?')) != NULL)
{
lua_pushstring(L, query_string + 1);
lua_setfield(L, -2, "QUERY_STRING");
if ((int)(query_string - req->url) > strlen(prefix))
{
case UH_HTTP_MSG_GET:
lua_pushstring(L, "GET");
break;
lua_pushlstring(L,
&req->url[strlen(prefix)],
(int)(query_string - req->url) - strlen(prefix)
);
case UH_HTTP_MSG_HEAD:
lua_pushstring(L, "HEAD");
break;
case UH_HTTP_MSG_POST:
lua_pushstring(L, "POST");
break;
}
lua_setfield(L, -2, "REQUEST_METHOD");
/* request url */
lua_pushstring(L, req->url);
lua_setfield(L, -2, "REQUEST_URI");
/* script name */
lua_pushstring(L, cl->server->conf->lua_prefix);
lua_setfield(L, -2, "SCRIPT_NAME");
/* query string, path info */
if ((query_string = strchr(req->url, '?')) != NULL)
{
lua_pushstring(L, query_string + 1);
lua_setfield(L, -2, "QUERY_STRING");
if ((int)(query_string - req->url) > strlen(prefix))
{
lua_pushlstring(L,
&req->url[strlen(prefix)],
(int)(query_string - req->url) - strlen(prefix)
);
lua_setfield(L, -2, "PATH_INFO");
}
}
else if (strlen(req->url) > strlen(prefix))
{
lua_pushstring(L, &req->url[strlen(prefix)]);
lua_setfield(L, -2, "PATH_INFO");
}
}
else if (strlen(req->url) > strlen(prefix))
{
lua_pushstring(L, &req->url[strlen(prefix)]);
lua_setfield(L, -2, "PATH_INFO");
}
/* http protcol version */
lua_pushnumber(L, floor(req->version * 10) / 10);
lua_setfield(L, -2, "HTTP_VERSION");
/* http protcol version */
lua_pushnumber(L, floor(req->version * 10) / 10);
lua_setfield(L, -2, "HTTP_VERSION");
if (req->version > 1.0)
lua_pushstring(L, "HTTP/1.1");
else
lua_pushstring(L, "HTTP/1.0");
if (req->version > 1.0)
lua_pushstring(L, "HTTP/1.1");
else
lua_pushstring(L, "HTTP/1.0");
lua_setfield(L, -2, "SERVER_PROTOCOL");
lua_setfield(L, -2, "SERVER_PROTOCOL");
/* address information */
lua_pushstring(L, sa_straddr(&cl->peeraddr));
lua_setfield(L, -2, "REMOTE_ADDR");
/* address information */
lua_pushstring(L, sa_straddr(&cl->peeraddr));
lua_setfield(L, -2, "REMOTE_ADDR");
lua_pushinteger(L, sa_port(&cl->peeraddr));
lua_setfield(L, -2, "REMOTE_PORT");
lua_pushinteger(L, sa_port(&cl->peeraddr));
lua_setfield(L, -2, "REMOTE_PORT");
lua_pushstring(L, sa_straddr(&cl->servaddr));
lua_setfield(L, -2, "SERVER_ADDR");
lua_pushstring(L, sa_straddr(&cl->servaddr));
lua_setfield(L, -2, "SERVER_ADDR");
lua_pushinteger(L, sa_port(&cl->servaddr));
lua_setfield(L, -2, "SERVER_PORT");
lua_pushinteger(L, sa_port(&cl->servaddr));
lua_setfield(L, -2, "SERVER_PORT");
/* essential env vars */
/* essential env vars */
foreach_header(i, req->headers)
{
if (!strcasecmp(req->headers[i], "Content-Length"))
{
content_length = atoi(req->headers[i+1]);
}
else if (!strcasecmp(req->headers[i], "Content-Type"))
{
lua_pushstring(L, req->headers[i+1]);
lua_setfield(L, -2, "CONTENT_TYPE");
}
}
lua_pushnumber(L, content_length);
lua_setfield(L, -2, "CONTENT_LENGTH");
/* misc. headers */
lua_newtable(L);
foreach_header(i, req->headers)
{
if( strcasecmp(req->headers[i], "Content-Length") &&
strcasecmp(req->headers[i], "Content-Type"))
{
lua_pushstring(L, req->headers[i+1]);
lua_setfield(L, -2, req->headers[i]);
}
}
lua_setfield(L, -2, "headers");
/* call */
switch (lua_pcall(L, 1, 0, 0))
{
case LUA_ERRMEM:
case LUA_ERRRUN:
err_str = luaL_checkstring(L, -1);
if (! err_str)
err_str = "Unknown error";
printf("HTTP/%.1f 500 Internal Server Error\r\n"
"Connection: close\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: %i\r\n\r\n"
"Lua raised a runtime error:\n %s\n",
req->version, 31 + strlen(err_str), err_str);
break;
default:
break;
}
close(wfd[0]);
close(rfd[1]);
exit(0);
break;
/* parent; handle I/O relaying */
default:
memset(state, 0, sizeof(*state));
state->cl = cl;
state->cl->proc.pid = child;
/* close unneeded pipe ends */
close(rfd[1]);
close(wfd[0]);
D("Lua: Child(%d) created: rfd(%d) wfd(%d)\n", child, rfd[0], wfd[1]);
state->content_length = cl->httpbuf.len;
/* find content length */
if (req->method == UH_HTTP_MSG_POST)
{
foreach_header(i, req->headers)
{
if (!strcasecmp(req->headers[i], "Content-Length"))
{
lua_pushnumber(L, atoi(req->headers[i+1]));
lua_setfield(L, -2, "CONTENT_LENGTH");
}
else if (!strcasecmp(req->headers[i], "Content-Type"))
{
lua_pushstring(L, req->headers[i+1]);
lua_setfield(L, -2, "CONTENT_TYPE");
}
}
/* misc. headers */
lua_newtable(L);
foreach_header(i, req->headers)
{
if( strcasecmp(req->headers[i], "Content-Length") &&
strcasecmp(req->headers[i], "Content-Type")
) {
lua_pushstring(L, req->headers[i+1]);
lua_setfield(L, -2, req->headers[i]);
}
}
lua_setfield(L, -2, "headers");
/* call */
switch (lua_pcall(L, 1, 0, 0))
{
case LUA_ERRMEM:
case LUA_ERRRUN:
err_str = luaL_checkstring(L, -1);
if (! err_str)
err_str = "Unknown error";
printf(
"HTTP/%.1f 500 Internal Server Error\r\n"
"Connection: close\r\n"
"Content-Type: text/plain\r\n"
"Content-Length: %i\r\n\r\n"
"Lua raised a runtime error:\n %s\n",
req->version, 31 + strlen(err_str), err_str
);
break;
default:
break;
}
close(wfd[0]);
close(rfd[1]);
exit(0);
break;
/* parent; handle I/O relaying */
default:
/* close unneeded pipe ends */
close(rfd[1]);
close(wfd[0]);
/* max watch fd */
fd_max = max(rfd[0], wfd[1]) + 1;
/* find content length */
if (req->method == UH_HTTP_MSG_POST)
{
foreach_header(i, req->headers)
{
if (! strcasecmp(req->headers[i], "Content-Length"))
{
content_length = atoi(req->headers[i+1]);
break;
}
}
}
#define ensure(x) \
do { if (x < 0) goto out; } while(0)
data_sent = 0;
timeout.tv_sec = cl->server->conf->script_timeout;
timeout.tv_usec = 0;
/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
while (1)
{
FD_ZERO(&reader);
FD_ZERO(&writer);
FD_SET(rfd[0], &reader);
FD_SET(wfd[1], &writer);
/* wait until we can read or write or both */
if (select_intr(fd_max, &reader,
(content_length > -1) ? &writer : NULL,
NULL,
(data_sent < 1) ? &timeout : NULL) > 0)
{
/* ready to write to Lua child */
if (FD_ISSET(wfd[1], &writer))
{
/* there is unread post data waiting */
if (content_length > 0)
{
/* read it from socket ... */
if ((buflen = uh_tcp_recv(cl, buf, min(content_length, sizeof(buf)))) > 0)
{
/* ... and write it to child's stdin */
if (write(wfd[1], buf, buflen) < 0)
perror("write()");
content_length -= buflen;
}
/* unexpected eof! */
else
{
if (write(wfd[1], "", 0) < 0)
perror("write()");
content_length = 0;
}
}
/* there is no more post data, close pipe to child's stdin */
else if (content_length > -1)
{
close(wfd[1]);
content_length = -1;
}
}
/* ready to read from Lua child */
if (FD_ISSET(rfd[0], &reader))
{
/* read data from child ... */
if ((buflen = read(rfd[0], buf, sizeof(buf))) > 0)
{
/* pass through buffer to socket */
ensure(uh_tcp_send(cl, buf, buflen));
data_sent = 1;
}
/* looks like eof from child */
else
{
/* error? */
if (!data_sent)
uh_http_sendhf(cl, 500, "Internal Server Error",
"The Lua child did not produce any response");
break;
}
}
}
/* timeout exceeded or interrupted by SIGCHLD */
else
{
if ((errno != EINTR) && ! data_sent)
{
ensure(uh_http_sendhf(cl, 504, "Gateway Timeout",
"The Lua script took too long to produce "
"a response"));
}
state->content_length = atoi(req->headers[i+1]);
break;
}
}
}
out:
close(rfd[0]);
close(wfd[1]);
state->rfd = rfd[0];
fd_nonblock(state->rfd);
if (!kill(child, 0))
{
kill(child, SIGTERM);
waitpid(child, NULL, 0);
}
state->wfd = wfd[1];
fd_nonblock(state->wfd);
break;
cl->cb = uh_lua_socket_cb;
cl->priv = state;
break;
}
return true;
}
void uh_lua_close(lua_State *L)

17
package/uhttpd/src/uhttpd-lua.h
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - Lua header
*
* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -32,12 +32,17 @@
#define UH_LUA_ERR_PARAM -3
struct uh_lua_state {
int rfd;
int wfd;
struct client *cl;
char httpbuf[UH_LIMIT_MSGHEAD];
int content_length;
bool data_sent;
};
lua_State * uh_lua_init(const struct config *conf);
void uh_lua_request(
struct client *cl, struct http_request *req, lua_State *L
);
bool uh_lua_request(struct client *cl, lua_State *L);
void uh_lua_close(lua_State *L);
#endif

246
package/uhttpd/src/uhttpd-tls.c
View file

@ -23,150 +23,19 @@
#include <syslog.h>
#define dbg(...) syslog(LOG_INFO, __VA_ARGS__)
#ifdef TLS_IS_CYASSL
static int uh_cyassl_recv_cb(char *buf, int sz, void *ctx)
{
int rv;
int socket = *(int *)ctx;
struct client *cl;
if (!(cl = uh_client_lookup(socket)))
return -1; /* unexpected error */
rv = uh_tcp_recv_lowlevel(cl, buf, sz);
if (rv < 0)
return -4; /* interrupted */
if (rv == 0)
return -5; /* connection closed */
return rv;
}
static int uh_cyassl_send_cb(char *buf, int sz, void *ctx)
{
int rv;
int socket = *(int *)ctx;
struct client *cl;
if (!(cl = uh_client_lookup(socket)))
return -1; /* unexpected error */
rv = uh_tcp_send_lowlevel(cl, buf, sz);
if (rv <= 0)
return -5; /* connection dead */
return rv;
}
void SetCallbackIORecv_Ctx(SSL_CTX*, int (*)(char *, int, void *));
void SetCallbackIOSend_Ctx(SSL_CTX*, int (*)(char *, int, void *));
static void uh_tls_ctx_setup(SSL_CTX *ctx)
{
SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL);
SetCallbackIORecv_Ctx(ctx, uh_cyassl_recv_cb);
SetCallbackIOSend_Ctx(ctx, uh_cyassl_send_cb);
return;
}
static int uh_tls_client_ctx_setup(SSL *ssl, int socket)
{
return SSL_set_fd(ssl, socket);
}
#endif /* TLS_IS_CYASSL */
#ifdef TLS_IS_OPENSSL
static long uh_openssl_bio_ctrl_cb(BIO *b, int cmd, long num, void *ptr)
{
long rv = 1;
switch (cmd)
{
case BIO_C_SET_FD:
b->num = *((int *)ptr);
b->shutdown = (int)num;
b->init = 1;
break;
case BIO_C_GET_FD:
if (!b->init)
return -1;
if (ptr)
*((int *)ptr) = b->num;
rv = b->num;
break;
}
return rv;
}
static int uh_openssl_bio_read_cb(BIO *b, char *out, int outl)
{
int rv = 0;
struct client *cl;
if (!(cl = uh_client_lookup(b->num)))
return -1;
if (out != NULL)
rv = uh_tcp_recv_lowlevel(cl, out, outl);
return rv;
}
static int uh_openssl_bio_write_cb(BIO *b, const char *in, int inl)
{
struct client *cl;
if (!(cl = uh_client_lookup(b->num)))
return -1;
return uh_tcp_send_lowlevel(cl, in, inl);
}
static BIO_METHOD uh_openssl_bio_methods = {
.type = BIO_TYPE_SOCKET,
.name = "uhsocket",
.ctrl = uh_openssl_bio_ctrl_cb,
.bwrite = uh_openssl_bio_write_cb,
.bread = uh_openssl_bio_read_cb
};
static void uh_tls_ctx_setup(SSL_CTX *ctx)
{
SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL);
return;
}
static int uh_tls_client_ctx_setup(SSL *ssl, int socket)
{
BIO *b;
if (!(b = BIO_new(&uh_openssl_bio_methods)))
return 0;
BIO_set_fd(b, socket, BIO_NOCLOSE);
SSL_set_bio(ssl, b, b);
return 1;
}
#endif /* TLS_IS_OPENSSL */
SSL_CTX * uh_tls_ctx_init()
SSL_CTX * uh_tls_ctx_init(void)
{
SSL_CTX *c;
SSL_load_error_strings();
SSL_library_init();
#if TLS_IS_OPENSSL
if ((c = SSL_CTX_new(SSLv23_server_method())) != NULL)
#else
if ((c = SSL_CTX_new(TLSv1_server_method())) != NULL)
uh_tls_ctx_setup(c);
#endif
SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
return c;
}
@ -199,53 +68,100 @@ void uh_tls_ctx_free(struct listener *l)
int uh_tls_client_accept(struct client *c)
{
int rv;
int rv, err;
int fd = c->fd.fd;
if( c->server && c->server->tls )
{
c->tls = SSL_new(c->server->tls);
if( c->tls )
{
if( (rv = uh_tls_client_ctx_setup(c->tls, c->socket)) < 1 )
goto cleanup;
if( (rv = SSL_accept(c->tls)) < 1 )
goto cleanup;
}
else
rv = 0;
}
else
if (!c->server || !c->server->tls)
{
c->tls = NULL;
rv = 1;
return 1;
}
done:
return rv;
if ((c->tls = SSL_new(c->server->tls)))
{
if ((rv = SSL_set_fd(c->tls, fd)) < 1)
{
SSL_free(c->tls);
c->tls = NULL;
}
else
{
while (true)
{
rv = SSL_accept(c->tls);
err = SSL_get_error(c->tls, rv);
cleanup:
SSL_free(c->tls);
c->tls = NULL;
goto done;
if ((rv != 1) &&
(err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE))
{
if (uh_socket_wait(fd, c->server->conf->network_timeout,
(err == SSL_ERROR_WANT_WRITE)))
{
D("TLS: accept(%d) = retry\n", fd);
continue;
}
D("TLS: accept(%d) = timeout\n", fd);
}
else if (rv == 1)
{
D("TLS: accept(%d) = %p\n", fd, c->tls);
return 1;
}
#ifdef TLS_IS_OPENSSL
D("TLS: accept(%d) = failed: %s\n",
fd, ERR_error_string(ERR_get_error(), NULL));
#endif
SSL_free(c->tls);
c->tls = NULL;
break;
}
}
}
return 0;
}
int uh_tls_client_recv(struct client *c, void *buf, int len)
int uh_tls_client_recv(struct client *c, char *buf, int len)
{
int rv = SSL_read(c->tls, buf, len);
return (rv > 0) ? rv : -1;
int err = SSL_get_error(c->tls, 0);
if ((rv == -1) && (err == SSL_ERROR_WANT_READ))
{
D("TLS: recv(%d, %d) = retry\n", c->fd.fd, len);
errno = EAGAIN;
return -1;
}
D("TLS: recv(%d, %d) = %d\n", c->fd.fd, len, rv);
return rv;
}
int uh_tls_client_send(struct client *c, void *buf, int len)
int uh_tls_client_send(struct client *c, const char *buf, int len)
{
int rv = SSL_write(c->tls, buf, len);
return (rv > 0) ? rv : -1;
int err = SSL_get_error(c->tls, 0);
if ((rv == -1) && (err == SSL_ERROR_WANT_WRITE))
{
D("TLS: send(%d, %d) = retry\n", c->fd.fd, len);
errno = EAGAIN;
return -1;
}
D("TLS: send(%d, %d) = %d\n", c->fd.fd, len, rv);
return rv;
}
void uh_tls_client_close(struct client *c)
{
if( c->tls )
if (c->tls)
{
D("TLS: close(%d)\n", c->fd.fd);
SSL_shutdown(c->tls);
SSL_free(c->tls);

8
package/uhttpd/src/uhttpd-tls.h
View file

@ -19,7 +19,9 @@
#ifndef _UHTTPD_TLS_
#include <openssl/ssl.h>
#ifdef TLS_IS_OPENSSL
#include <openssl/err.h>
#endif
SSL_CTX * uh_tls_ctx_init();
int uh_tls_ctx_cert(SSL_CTX *c, const char *file);
@ -27,8 +29,8 @@ int uh_tls_ctx_key(SSL_CTX *c, const char *file);
void uh_tls_ctx_free(struct listener *l);
int uh_tls_client_accept(struct client *c);
int uh_tls_client_recv(struct client *c, void *buf, int len);
int uh_tls_client_send(struct client *c, void *buf, int len);
int uh_tls_client_recv(struct client *c, char *buf, int len);
int uh_tls_client_send(struct client *c, const char *buf, int len);
void uh_tls_client_close(struct client *c);
#endif

957
package/uhttpd/src/uhttpd-ubus.c Normal file
View file

@ -0,0 +1,957 @@
/*
* uhttpd - Tiny single-threaded httpd - ubus handler
*
* Copyright (C) 2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "uhttpd.h"
#include "uhttpd-utils.h"
#include "uhttpd-ubus.h"
enum {
UH_UBUS_SN_TIMEOUT,
__UH_UBUS_SN_MAX,
};
static const struct blobmsg_policy new_policy[__UH_UBUS_SN_MAX] = {
[UH_UBUS_SN_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
};
enum {
UH_UBUS_SI_SID,
__UH_UBUS_SI_MAX,
};
static const struct blobmsg_policy sid_policy[__UH_UBUS_SI_MAX] = {
[UH_UBUS_SI_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
};
enum {
UH_UBUS_SS_SID,
UH_UBUS_SS_VALUES,
__UH_UBUS_SS_MAX,
};
static const struct blobmsg_policy set_policy[__UH_UBUS_SS_MAX] = {
[UH_UBUS_SS_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
[UH_UBUS_SS_VALUES] = { .name = "values", .type = BLOBMSG_TYPE_TABLE },
};
enum {
UH_UBUS_SG_SID,
UH_UBUS_SG_KEYS,
__UH_UBUS_SG_MAX,
};
static const struct blobmsg_policy get_policy[__UH_UBUS_SG_MAX] = {
[UH_UBUS_SG_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
[UH_UBUS_SG_KEYS] = { .name = "keys", .type = BLOBMSG_TYPE_ARRAY },
};
enum {
UH_UBUS_SA_SID,
UH_UBUS_SA_OBJECTS,
__UH_UBUS_SA_MAX,
};
static const struct blobmsg_policy acl_policy[__UH_UBUS_SA_MAX] = {
[UH_UBUS_SA_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
[UH_UBUS_SA_OBJECTS] = { .name = "objects", .type = BLOBMSG_TYPE_ARRAY },
};
static bool
uh_ubus_strmatch(const char *str, const char *pat)
{
while (*pat)
{
if (*pat == '?')
{
if (!*str)
return false;
str++;
pat++;
}
else if (*pat == '*')
{
if (uh_ubus_strmatch(str, pat+1))
return true;
if (*str && uh_ubus_strmatch(str+1, pat))
return true;
return false;
}
else if (*str++ != *pat++)
{
return false;
}
}
return (!*str && !*pat);
}
static int
uh_ubus_avlcmp(const void *k1, const void *k2, void *ptr)
{
return strcmp((char *)k1, (char *)k2);
}
static void
uh_ubus_random(char *dest)
{
int i;
unsigned char buf[16] = { 0 };
FILE *f;
if ((f = fopen("/dev/urandom", "r")) != NULL)
{
fread(buf, 1, sizeof(buf), f);
fclose(f);
}
for (i = 0; i < sizeof(buf); i++)
sprintf(dest + (i<<1), "%02x", buf[i]);
}
static void
uh_ubus_session_dump_data(struct uh_ubus_session *ses, struct blob_buf *b)
{
struct uh_ubus_session_data *d;
avl_for_each_element(&ses->data, d, avl)
{
blobmsg_add_field(b, blobmsg_type(d->attr), blobmsg_name(d->attr),
blobmsg_data(d->attr), blobmsg_data_len(d->attr));
}
}
static void
uh_ubus_session_dump_acls(struct uh_ubus_session *ses, struct blob_buf *b)
{
struct uh_ubus_session_acl *acl;
const char *lastobj = NULL;
void *c = NULL;
avl_for_each_element(&ses->acls, acl, avl)
{
if (!lastobj || strcmp(acl->object, lastobj))
{
if (c) blobmsg_close_array(b, c);
c = blobmsg_open_array(b, acl->object);
}
blobmsg_add_string(b, NULL, acl->function);
lastobj = acl->object;
}
if (c) blobmsg_close_array(b, c);
}
static void
uh_ubus_session_dump(struct uh_ubus_session *ses,
struct ubus_context *ctx,
struct ubus_request_data *req)
{
void *c;
struct blob_buf b;
memset(&b, 0, sizeof(b));
blob_buf_init(&b, 0);
blobmsg_add_string(&b, "sid", ses->id);
blobmsg_add_u32(&b, "timeout", ses->timeout);
blobmsg_add_u32(&b, "touched", ses->touched.tv_sec);
c = blobmsg_open_table(&b, "acls");
uh_ubus_session_dump_acls(ses, &b);
blobmsg_close_table(&b, c);
c = blobmsg_open_table(&b, "data");
uh_ubus_session_dump_data(ses, &b);
blobmsg_close_table(&b, c);
ubus_send_reply(ctx, req, b.head);
blob_buf_free(&b);
}
static struct uh_ubus_session *
uh_ubus_session_create(struct uh_ubus_state *state, int timeout)
{
struct uh_ubus_session *ses;
ses = malloc(sizeof(*ses));
/* failed to allocate memory... */
if (!ses)
return NULL;
memset(ses, 0, sizeof(*ses));
uh_ubus_random(ses->id);
ses->timeout = timeout;
ses->avl.key = ses->id;
avl_insert(&state->sessions, &ses->avl);
avl_init(&ses->acls, uh_ubus_avlcmp, true, NULL);
avl_init(&ses->data, uh_ubus_avlcmp, false, NULL);
clock_gettime(CLOCK_MONOTONIC, &ses->touched);
return ses;
}
static struct uh_ubus_session *
uh_ubus_session_get(struct uh_ubus_state *state, const char *id)
{
struct uh_ubus_session *ses;
ses = avl_find_element(&state->sessions, id, ses, avl);
if (ses)
clock_gettime(CLOCK_MONOTONIC, &ses->touched);
return ses;
}
static void
uh_ubus_session_destroy(struct uh_ubus_state *state,
struct uh_ubus_session *ses)
{
struct uh_ubus_session_acl *acl, *nacl;
struct uh_ubus_session_data *data, *ndata;
avl_remove_all_elements(&ses->acls, acl, avl, nacl)
free(acl);
avl_remove_all_elements(&ses->data, data, avl, ndata)
free(data);
avl_delete(&state->sessions, &ses->avl);
free(ses);
}
static void
uh_ubus_session_cleanup(struct uh_ubus_state *state)
{
struct timespec now;
struct uh_ubus_session *ses, *nses;
clock_gettime(CLOCK_MONOTONIC, &now);
avl_for_each_element_safe(&state->sessions, ses, avl, nses)
{
if ((now.tv_sec - ses->touched.tv_sec) >= ses->timeout)
uh_ubus_session_destroy(state, ses);
}
}
static int
uh_ubus_handle_create(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct blob_attr *tb[__UH_UBUS_SN_MAX];
int timeout = state->timeout;
blobmsg_parse(new_policy, __UH_UBUS_SN_MAX, tb, blob_data(msg), blob_len(msg));
/* TODO: make this a uloop timeout */
uh_ubus_session_cleanup(state);
if (tb[UH_UBUS_SN_TIMEOUT])
timeout = *(uint32_t *)blobmsg_data(tb[UH_UBUS_SN_TIMEOUT]);
ses = uh_ubus_session_create(state, timeout);
if (ses)
uh_ubus_session_dump(ses, ctx, req);
return 0;
}
static int
uh_ubus_handle_list(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct blob_attr *tb[__UH_UBUS_SI_MAX];
blobmsg_parse(sid_policy, __UH_UBUS_SI_MAX, tb, blob_data(msg), blob_len(msg));
/* TODO: make this a uloop timeout */
uh_ubus_session_cleanup(state);
if (!tb[UH_UBUS_SI_SID])
{
avl_for_each_element(&state->sessions, ses, avl)
uh_ubus_session_dump(ses, ctx, req);
}
else
{
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SI_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
uh_ubus_session_dump(ses, ctx, req);
}
return 0;
}
static int
uh_ubus_session_grant(struct uh_ubus_session *ses, struct ubus_context *ctx,
const char *object, const char *function)
{
struct uh_ubus_session_acl *acl, *nacl;
acl = avl_find_element(&ses->acls, object, acl, avl);
if (acl)
{
avl_for_element_to_last(&ses->acls, acl, acl, avl)
{
if (!strcmp(acl->function, function))
return 1;
}
}
nacl = malloc(sizeof(*nacl) + strlen(object) + strlen(function) + 2);
if (nacl)
{
memset(nacl, 0, sizeof(*nacl));
nacl->function = nacl->object + 1;
nacl->function += sprintf(nacl->object, "%s", object);
sprintf(nacl->function, "%s", function);
nacl->avl.key = nacl->object;
avl_insert(&ses->acls, &nacl->avl);
}
return 0;
}
static int
uh_ubus_session_revoke(struct uh_ubus_session *ses, struct ubus_context *ctx,
const char *object, const char *function)
{
struct uh_ubus_session_acl *acl, *nacl;
if (!object && !function)
{
avl_remove_all_elements(&ses->acls, acl, avl, nacl)
free(acl);
}
else
{
avl_for_each_element_safe(&ses->acls, acl, avl, nacl)
{
if (uh_ubus_strmatch(acl->object, object) &&
uh_ubus_strmatch(acl->function, function))
{
avl_delete(&ses->acls, &acl->avl);
free(acl);
}
}
}
return 0;
}
static int
uh_ubus_handle_grant(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct blob_attr *tb[__UH_UBUS_SA_MAX];
struct blob_attr *attr, *sattr;
const char *object, *function;
int rem1, rem2;
blobmsg_parse(acl_policy, __UH_UBUS_SA_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[UH_UBUS_SA_SID] || !tb[UH_UBUS_SA_OBJECTS])
return UBUS_STATUS_INVALID_ARGUMENT;
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SA_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
blobmsg_for_each_attr(attr, tb[UH_UBUS_SA_OBJECTS], rem1)
{
if (blob_id(attr) != BLOBMSG_TYPE_ARRAY)
continue;
object = NULL;
function = NULL;
blobmsg_for_each_attr(sattr, attr, rem2)
{
if (blob_id(sattr) != BLOBMSG_TYPE_STRING)
continue;
if (!object)
object = blobmsg_data(sattr);
else if (!function)
function = blobmsg_data(sattr);
else
break;
}
if (object && function)
uh_ubus_session_grant(ses, ctx, object, function);
}
return 0;
}
static int
uh_ubus_handle_revoke(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct blob_attr *tb[__UH_UBUS_SA_MAX];
struct blob_attr *attr, *sattr;
const char *object, *function;
int rem1, rem2;
blobmsg_parse(acl_policy, __UH_UBUS_SA_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[UH_UBUS_SA_SID])
return UBUS_STATUS_INVALID_ARGUMENT;
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SA_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
if (!tb[UH_UBUS_SA_OBJECTS])
{
uh_ubus_session_revoke(ses, ctx, NULL, NULL);
}
else
{
blobmsg_for_each_attr(attr, tb[UH_UBUS_SA_OBJECTS], rem1)
{
if (blob_id(attr) != BLOBMSG_TYPE_ARRAY)
continue;
object = NULL;
function = NULL;
blobmsg_for_each_attr(sattr, attr, rem2)
{
if (blob_id(sattr) != BLOBMSG_TYPE_STRING)
continue;
if (!object)
object = blobmsg_data(sattr);
else if (!function)
function = blobmsg_data(sattr);
else
break;
}
if (object && function)
uh_ubus_session_revoke(ses, ctx, object, function);
}
}
return 0;
}
static int
uh_ubus_handle_set(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct uh_ubus_session_data *data;
struct blob_attr *tb[__UH_UBUS_SA_MAX];
struct blob_attr *attr;
int rem;
blobmsg_parse(set_policy, __UH_UBUS_SS_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[UH_UBUS_SS_SID] || !tb[UH_UBUS_SS_VALUES])
return UBUS_STATUS_INVALID_ARGUMENT;
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SS_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
blobmsg_for_each_attr(attr, tb[UH_UBUS_SS_VALUES], rem)
{
if (!blobmsg_name(attr)[0])
continue;
data = avl_find_element(&ses->data, blobmsg_name(attr), data, avl);
if (data)
{
avl_delete(&ses->data, &data->avl);
free(data);
}
data = malloc(sizeof(*data) + blob_pad_len(attr));
if (!data)
break;
memset(data, 0, sizeof(*data) + blob_pad_len(attr));
memcpy(data->attr, attr, blob_pad_len(attr));
data->avl.key = blobmsg_name(data->attr);
avl_insert(&ses->data, &data->avl);
}
return 0;
}
static int
uh_ubus_handle_get(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct uh_ubus_session_data *data;
struct blob_attr *tb[__UH_UBUS_SA_MAX];
struct blob_attr *attr;
struct blob_buf b;
void *c;
int rem;
blobmsg_parse(get_policy, __UH_UBUS_SG_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[UH_UBUS_SG_SID])
return UBUS_STATUS_INVALID_ARGUMENT;
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SG_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
memset(&b, 0, sizeof(b));
blob_buf_init(&b, 0);
c = blobmsg_open_table(&b, "values");
if (!tb[UH_UBUS_SG_KEYS])
{
uh_ubus_session_dump_data(ses, &b);
}
else
{
blobmsg_for_each_attr(attr, tb[UH_UBUS_SG_KEYS], rem)
{
if (blob_id(attr) != BLOBMSG_TYPE_STRING)
continue;
data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl);
if (!data)
continue;
blobmsg_add_field(&b, blobmsg_type(data->attr),
blobmsg_name(data->attr),
blobmsg_data(data->attr),
blobmsg_data_len(data->attr));
}
}
blobmsg_close_table(&b, c);
ubus_send_reply(ctx, req, b.head);
blob_buf_free(&b);
return 0;
}
static int
uh_ubus_handle_unset(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct uh_ubus_session_data *data, *ndata;
struct blob_attr *tb[__UH_UBUS_SA_MAX];
struct blob_attr *attr;
int rem;
blobmsg_parse(get_policy, __UH_UBUS_SG_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[UH_UBUS_SG_SID])
return UBUS_STATUS_INVALID_ARGUMENT;
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SG_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
if (!tb[UH_UBUS_SG_KEYS])
{
avl_remove_all_elements(&ses->data, data, avl, ndata)
free(data);
}
else
{
blobmsg_for_each_attr(attr, tb[UH_UBUS_SG_KEYS], rem)
{
if (blob_id(attr) != BLOBMSG_TYPE_STRING)
continue;
data = avl_find_element(&ses->data, blobmsg_data(attr), data, avl);
if (!data)
continue;
avl_delete(&ses->data, &data->avl);
free(data);
}
}
return 0;
}
static int
uh_ubus_handle_destroy(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct uh_ubus_state *state = container_of(obj, struct uh_ubus_state, ubus);
struct uh_ubus_session *ses;
struct blob_attr *tb[__UH_UBUS_SA_MAX];
blobmsg_parse(sid_policy, __UH_UBUS_SI_MAX, tb, blob_data(msg), blob_len(msg));
if (!tb[UH_UBUS_SI_SID])
return UBUS_STATUS_INVALID_ARGUMENT;
ses = uh_ubus_session_get(state, blobmsg_data(tb[UH_UBUS_SI_SID]));
if (!ses)
return UBUS_STATUS_NOT_FOUND;
uh_ubus_session_destroy(state, ses);
return 0;
}
struct uh_ubus_state *
uh_ubus_init(const struct config *conf)
{
int rv;
struct uh_ubus_state *state;
struct ubus_object *session_object;
static struct ubus_method session_methods[] = {
UBUS_METHOD("create", uh_ubus_handle_create, new_policy),
UBUS_METHOD("list", uh_ubus_handle_list, sid_policy),
UBUS_METHOD("grant", uh_ubus_handle_grant, acl_policy),
UBUS_METHOD("revoke", uh_ubus_handle_revoke, acl_policy),
UBUS_METHOD("set", uh_ubus_handle_set, set_policy),
UBUS_METHOD("get", uh_ubus_handle_get, get_policy),
UBUS_METHOD("unset", uh_ubus_handle_unset, get_policy),
UBUS_METHOD("destroy", uh_ubus_handle_destroy, sid_policy),
};
static struct ubus_object_type session_type =
UBUS_OBJECT_TYPE("uhttpd", session_methods);
state = malloc(sizeof(*state));
if (!state)
{
fprintf(stderr, "Unable to allocate memory for ubus state\n");
exit(1);
}
memset(state, 0, sizeof(*state));
state->ctx = ubus_connect(conf->ubus_socket);
state->timeout = conf->script_timeout;
if (!state->ctx)
{
fprintf(stderr, "Unable to connect to ubus socket\n");
exit(1);
}
ubus_add_uloop(state->ctx);
session_object = &state->ubus;
session_object->name = "session";
session_object->type = &session_type;
session_object->methods = session_methods;
session_object->n_methods = ARRAY_SIZE(session_methods);
rv = ubus_add_object(state->ctx, &state->ubus);
if (rv)
{
fprintf(stderr, "Unable to publish ubus object: %s\n",
ubus_strerror(rv));
exit(1);
}
blob_buf_init(&state->buf, 0);
avl_init(&state->sessions, uh_ubus_avlcmp, false, NULL);
return state;
}
static bool
uh_ubus_request_parse_url(struct client *cl, char **sid, char **obj, char **fun)
{
char *url = cl->request.url + strlen(cl->server->conf->ubus_prefix);
for (; url && *url == '/'; *url++ = 0);
*sid = url;
for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0);
*obj = url;
for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0);
*fun = url;
for (url = url ? strchr(url, '/') : NULL; url && *url == '/'; *url++ = 0);
return (*sid && *obj && *fun);
}
static bool
uh_ubus_request_parse_post(struct client *cl, int len, struct blob_buf *b)
{
int rlen;
bool rv = false;
char buf[UH_LIMIT_MSGHEAD];
struct json_object *obj = NULL;
struct json_tokener *tok = NULL;
if (!len)
return NULL;
memset(b, 0, sizeof(*b));
blob_buf_init(b, 0);
tok = json_tokener_new();
while (len > 0)
{
/* remaining data in http head buffer ... */
if (cl->httpbuf.len > 0)
{
rlen = min(len, cl->httpbuf.len);
D("ubus: feed %d HTTP buffer bytes\n", rlen);
memcpy(buf, cl->httpbuf.ptr, rlen);
cl->httpbuf.len -= rlen;
cl->httpbuf.ptr += rlen;
}
/* read it from socket ... */
else
{
ensure_out(rlen = uh_tcp_recv(cl, buf, min(len, sizeof(buf))));
if ((rlen < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
break;
D("ubus: feed %d/%d TCP socket bytes\n",
rlen, min(len, sizeof(buf)));
}
obj = json_tokener_parse_ex(tok, buf, rlen);
len -= rlen;
if (tok->err != json_tokener_continue && !is_error(obj))
break;
}
out:
if (!is_error(obj))
{
if (json_object_get_type(obj) == json_type_object)
{
rv = true;
json_object_object_foreach(obj, key, val)
{
if (!blobmsg_add_json_element(b, key, val))
{
rv = false;
break;
}
}
}
json_object_put(obj);
}
json_tokener_free(tok);
if (!rv)
blob_buf_free(b);
return rv;
}
static void
uh_ubus_request_cb(struct ubus_request *req, int type, struct blob_attr *msg)
{
int len;
char *str;
struct client *cl = (struct client *)req->priv;
if (!msg)
{
uh_http_sendhf(cl, 204, "No content", "Function did not return data\n");
return;
}
str = blobmsg_format_json_indent(msg, true, 0);
len = strlen(str);
ensure_out(uh_http_sendf(cl, NULL, "HTTP/1.0 200 OK\r\n"));
ensure_out(uh_http_sendf(cl, NULL, "Content-Type: application/json\r\n"));
ensure_out(uh_http_sendf(cl, NULL, "Content-Length: %i\r\n\r\n", len));
ensure_out(uh_http_send(cl, NULL, str, len));
out:
free(str);
}
bool
uh_ubus_request(struct client *cl, struct uh_ubus_state *state)
{
int i, len = 0;
bool access = false;
char *sid, *obj, *fun;
struct blob_buf buf;
struct uh_ubus_session *ses;
struct uh_ubus_session_acl *acl;
uint32_t obj_id;
memset(&buf, 0, sizeof(buf));
blob_buf_init(&buf, 0);
if (!uh_ubus_request_parse_url(cl, &sid, &obj, &fun))
{
uh_http_sendhf(cl, 400, "Bad Request", "Invalid Request\n");
goto out;
}
if (!(ses = uh_ubus_session_get(state, sid)))
{
uh_http_sendhf(cl, 404, "Not Found", "No such session\n");
goto out;
}
avl_for_each_element(&ses->acls, acl, avl)
{
if (uh_ubus_strmatch(obj, acl->object) &&
uh_ubus_strmatch(fun, acl->function))
{
access = true;
break;
}
}
if (!access)
{
uh_http_sendhf(cl, 403, "Denied", "Access to object denied\n");
goto out;
}
/* find content length */
if (cl->request.method == UH_HTTP_MSG_POST)
{
foreach_header(i, cl->request.headers)
{
if (!strcasecmp(cl->request.headers[i], "Content-Length"))
{
len = atoi(cl->request.headers[i+1]);
break;
}
}
}
if (len > UH_UBUS_MAX_POST_SIZE)
{
uh_http_sendhf(cl, 413, "Too Large", "Message too big\n");
goto out;
}
if (len && !uh_ubus_request_parse_post(cl, len, &buf))
{
uh_http_sendhf(cl, 400, "Bad Request", "Invalid JSON data\n");
goto out;
}
if (ubus_lookup_id(state->ctx, obj, &obj_id))
{
uh_http_sendhf(cl, 500, "Internal Error", "Unable to lookup object\n");
goto out;
}
if (ubus_invoke(state->ctx, obj_id, fun, buf.head,
uh_ubus_request_cb, cl, state->timeout * 1000))
{
uh_http_sendhf(cl, 500, "Internal Error", "Unable to invoke function\n");
goto out;
}
out:
blob_buf_free(&buf);
return false;
}
void
uh_ubus_close(struct uh_ubus_state *state)
{
if (state->ctx)
ubus_free(state->ctx);
free(state);
}

70
package/uhttpd/src/uhttpd-ubus.h Normal file
View file

@ -0,0 +1,70 @@
/*
* uhttpd - Tiny single-threaded httpd - ubus header
*
* Copyright (C) 2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _UHTTPD_UBUS_
#include <time.h>
#include <libubus.h>
#include <libubox/avl.h>
#include <libubox/blobmsg_json.h>
#include <json/json.h>
#define UH_UBUS_MAX_POST_SIZE 4096
struct uh_ubus_state {
struct ubus_context *ctx;
struct ubus_object ubus;
struct blob_buf buf;
struct avl_tree sessions;
int timeout;
};
struct uh_ubus_request_data {
const char *sid;
const char *object;
const char *function;
};
struct uh_ubus_session {
char id[33];
int timeout;
struct avl_node avl;
struct avl_tree data;
struct avl_tree acls;
struct timespec touched;
};
struct uh_ubus_session_data {
struct avl_node avl;
struct blob_attr attr[];
};
struct uh_ubus_session_acl {
struct avl_node avl;
char *function;
char object[];
};
struct uh_ubus_state * uh_ubus_init(const struct config *conf);
bool uh_ubus_request(struct client *cl, struct uh_ubus_state *state);
void uh_ubus_close(struct uh_ubus_state *state);
#endif

250
package/uhttpd/src/uhttpd-utils.c
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - Utility functions
*
* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -103,120 +103,171 @@ char *strfind(char *haystack, int hslen, const char *needle, int ndlen)
return NULL;
}
/* interruptable select() */
int select_intr(int n, fd_set *r, fd_set *w, fd_set *e, struct timeval *t)
bool uh_socket_wait(int fd, int sec, bool write)
{
int rv;
sigset_t ssn, sso;
struct timeval timeout;
/* unblock SIGCHLD */
sigemptyset(&ssn);
sigaddset(&ssn, SIGCHLD);
sigaddset(&ssn, SIGPIPE);
sigprocmask(SIG_UNBLOCK, &ssn, &sso);
fd_set fds;
rv = select(n, r, w, e, t);
FD_ZERO(&fds);
FD_SET(fd, &fds);
/* restore signal mask */
sigprocmask(SIG_SETMASK, &sso, NULL);
timeout.tv_sec = sec;
timeout.tv_usec = 0;
return rv;
while (((rv = select(fd+1, write ? NULL : &fds, write ? &fds : NULL,
NULL, &timeout)) < 0) && (errno == EINTR))
{
D("IO: Socket(%d) select interrupted: %s\n",
fd, strerror(errno));
continue;
}
if (rv <= 0)
{
D("IO: Socket(%d) appears dead (rv=%d)\n", fd, rv);
return false;
}
return true;
}
static int __uh_raw_send(struct client *cl, const char *buf, int len, int sec,
int (*wfn) (struct client *, const char *, int))
{
ssize_t rv;
int fd = cl->fd.fd;
while (true)
{
if ((rv = wfn(cl, buf, len)) < 0)
{
if (errno == EINTR)
{
D("IO: Socket(%d) interrupted\n", cl->fd.fd);
continue;
}
else if ((sec > 0) && (errno == EAGAIN || errno == EWOULDBLOCK))
{
if (!uh_socket_wait(fd, sec, true))
return -1;
}
else
{
D("IO: Socket(%d) write error: %s\n", fd, strerror(errno));
return -1;
}
}
/*
* It is not entirely clear whether rv = 0 on nonblocking sockets
* is an error. In real world fuzzing tests, not handling it as close
* led to tight infinite loops in this send procedure, so treat it as
* closed and break out.
*/
else if (rv == 0)
{
D("IO: Socket(%d) closed\n", fd);
return 0;
}
else if (rv < len)
{
D("IO: Socket(%d) short write %d/%d bytes\n", fd, rv, len);
len -= rv;
buf += rv;
continue;
}
else
{
D("IO: Socket(%d) sent %d/%d bytes\n", fd, rv, len);
return rv;
}
}
}
int uh_tcp_send_lowlevel(struct client *cl, const char *buf, int len)
{
fd_set writer;
struct timeval timeout;
return write(cl->fd.fd, buf, len);
}
FD_ZERO(&writer);
FD_SET(cl->socket, &writer);
timeout.tv_sec = cl->server->conf->network_timeout;
timeout.tv_usec = 0;
if (select(cl->socket + 1, NULL, &writer, NULL, &timeout) > 0)
return send(cl->socket, buf, len, 0);
return -1;
int uh_raw_send(int fd, const char *buf, int len, int sec)
{
struct client_light cl = { .fd = { .fd = fd } };
return __uh_raw_send((struct client *)&cl, buf, len, sec,
uh_tcp_send_lowlevel);
}
int uh_tcp_send(struct client *cl, const char *buf, int len)
{
int seconds = cl->server->conf->network_timeout;
#ifdef HAVE_TLS
if (cl->tls)
return cl->server->conf->tls_send(cl, (void *)buf, len);
else
return __uh_raw_send(cl, buf, len, seconds,
cl->server->conf->tls_send);
#endif
return uh_tcp_send_lowlevel(cl, buf, len);
return __uh_raw_send(cl, buf, len, seconds, uh_tcp_send_lowlevel);
}
int uh_tcp_peek(struct client *cl, char *buf, int len)
static int __uh_raw_recv(struct client *cl, char *buf, int len, int sec,
int (*rfn) (struct client *, char *, int))
{
/* sanity check, prevent overflowing peek buffer */
if (len > sizeof(cl->peekbuf))
return -1;
ssize_t rv;
int fd = cl->fd.fd;
int sz = uh_tcp_recv(cl, buf, len);
/* store received data in peek buffer */
if (sz > 0)
while (true)
{
cl->peeklen = sz;
memcpy(cl->peekbuf, buf, sz);
if ((rv = rfn(cl, buf, len)) < 0)
{
if (errno == EINTR)
{
continue;
}
else if ((sec > 0) && (errno == EAGAIN || errno == EWOULDBLOCK))
{
if (!uh_socket_wait(fd, sec, false))
return -1;
}
else
{
D("IO: Socket(%d) read error: %s\n", fd, strerror(errno));
return -1;
}
}
else if (rv == 0)
{
D("IO: Socket(%d) closed\n", fd);
return 0;
}
else
{
D("IO: Socket(%d) read %d bytes\n", fd, rv);
return rv;
}
}
return sz;
}
int uh_tcp_recv_lowlevel(struct client *cl, char *buf, int len)
{
fd_set reader;
struct timeval timeout;
return read(cl->fd.fd, buf, len);
}
FD_ZERO(&reader);
FD_SET(cl->socket, &reader);
timeout.tv_sec = cl->server->conf->network_timeout;
timeout.tv_usec = 0;
if (select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0)
return recv(cl->socket, buf, len, 0);
return -1;
int uh_raw_recv(int fd, char *buf, int len, int sec)
{
struct client_light cl = { .fd = { .fd = fd } };
return __uh_raw_recv((struct client *)&cl, buf, len, sec,
uh_tcp_recv_lowlevel);
}
int uh_tcp_recv(struct client *cl, char *buf, int len)
{
int sz = 0;
int rsz = 0;
/* first serve data from peek buffer */
if (cl->peeklen > 0)
{
sz = min(cl->peeklen, len);
len -= sz; cl->peeklen -= sz;
memcpy(buf, cl->peekbuf, sz);
memmove(cl->peekbuf, &cl->peekbuf[sz], cl->peeklen);
}
/* caller wants more */
if (len > 0)
{
int seconds = cl->server->conf->network_timeout;
#ifdef HAVE_TLS
if (cl->tls)
rsz = cl->server->conf->tls_recv(cl, (void *)&buf[sz], len);
else
if (cl->tls)
return __uh_raw_recv(cl, buf, len, seconds,
cl->server->conf->tls_recv);
#endif
rsz = uh_tcp_recv_lowlevel(cl, (void *)&buf[sz], len);
if (rsz < 0)
return rsz;
sz += rsz;
}
return sz;
return __uh_raw_recv(cl, buf, len, seconds, uh_tcp_recv_lowlevel);
}
@ -841,8 +892,9 @@ struct listener * uh_listener_add(int sock, struct config *conf)
{
memset(new, 0, sizeof(struct listener));
new->socket = sock;
new->conf = conf;
new->fd.fd = sock;
new->conf = conf;
/* get local endpoint addr */
sl = sizeof(struct sockaddr_in6);
@ -863,7 +915,7 @@ struct listener * uh_listener_lookup(int sock)
struct listener *cur = NULL;
for (cur = uh_listeners; cur; cur = cur->next)
if (cur->socket == sock)
if (cur->fd.fd == sock)
return cur;
return NULL;
@ -879,7 +931,7 @@ struct client * uh_client_add(int sock, struct listener *serv)
{
memset(new, 0, sizeof(struct client));
new->socket = sock;
new->fd.fd = sock;
new->server = serv;
/* get remote endpoint addr */
@ -894,6 +946,8 @@ struct client * uh_client_add(int sock, struct listener *serv)
new->next = uh_clients;
uh_clients = new;
serv->n_clients++;
}
return new;
@ -904,26 +958,50 @@ struct client * uh_client_lookup(int sock)
struct client *cur = NULL;
for (cur = uh_clients; cur; cur = cur->next)
if (cur->socket == sock)
if (cur->fd.fd == sock)
return cur;
return NULL;
}
void uh_client_remove(int sock)
void uh_client_shutdown(struct client *cl)
{
#ifdef HAVE_TLS
/* free client tls context */
if (cl->server && cl->server->conf->tls)
cl->server->conf->tls_close(cl);
#endif
/* remove from global client list */
uh_client_remove(cl);
}
void uh_client_remove(struct client *cl)
{
struct client *cur = NULL;
struct client *prv = NULL;
for (cur = uh_clients; cur; prv = cur, cur = cur->next)
{
if (cur->socket == sock)
if ((cur == cl) || (!cl && cur->dead))
{
if (prv)
prv->next = cur->next;
else
uh_clients = cur->next;
if (cur->timeout.pending)
uloop_timeout_cancel(&cur->timeout);
if (cur->proc.pid)
uloop_process_delete(&cur->proc);
uloop_fd_delete(&cur->fd);
close(cur->fd.fd);
D("IO: Socket(%d) closing\n", cur->fd.fd);
cur->server->n_clients--;
free(cur);
break;
}

28
package/uhttpd/src/uhttpd-utils.h
View file

@ -1,7 +1,7 @@
/*
* uhttpd - Tiny single-threaded httpd - Utility header
*
* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -39,6 +39,9 @@
#define fd_cloexec(fd) \
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC)
#define fd_nonblock(fd) \
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK)
#define ensure_out(x) \
do { if((x) < 0) goto out; } while(0)
@ -64,18 +67,17 @@ int sa_rfc1918(void *sa);
char *strfind(char *haystack, int hslen, const char *needle, int ndlen);
int select_intr(int n, fd_set *r, fd_set *w, fd_set *e, struct timeval *t);
bool uh_socket_wait(int fd, int sec, bool write);
int uh_raw_send(int fd, const char *buf, int len, int seconds);
int uh_raw_recv(int fd, char *buf, int len, int seconds);
int uh_tcp_send(struct client *cl, const char *buf, int len);
int uh_tcp_send_lowlevel(struct client *cl, const char *buf, int len);
int uh_tcp_peek(struct client *cl, char *buf, int len);
int uh_tcp_recv(struct client *cl, char *buf, int len);
int uh_tcp_recv_lowlevel(struct client *cl, char *buf, int len);
int uh_http_sendhf(
struct client *cl, int code, const char *summary,
const char *fmt, ...
);
int uh_http_sendhf(struct client *cl, int code, const char *summary,
const char *fmt, ...);
#define uh_http_response(cl, code, message) \
uh_http_sendhf(cl, code, message, message)
@ -112,7 +114,17 @@ struct listener * uh_listener_lookup(int sock);
struct client * uh_client_add(int sock, struct listener *serv);
struct client * uh_client_lookup(int sock);
void uh_client_remove(int sock);
#define uh_client_error(cl, code, status, ...) do { \
uh_http_sendhf(cl, code, status, __VA_ARGS__); \
uh_client_shutdown(cl); \
} while(0)
void uh_client_shutdown(struct client *cl);
void uh_client_remove(struct client *cl);
#define uh_client_gc() uh_client_remove(NULL)
#ifdef HAVE_CGI
struct interpreter * uh_interpreter_add(const char *extn, const char *path);

598
package/uhttpd/src/uhttpd.c
View file

@ -42,11 +42,6 @@ static void uh_sigterm(int sig)
run = 0;
}
static void uh_sigchld(int sig)
{
while (waitpid(-1, NULL, WNOHANG) > 0) { }
}
static void uh_config_parse(struct config *conf)
{
FILE *c;
@ -126,6 +121,8 @@ static void uh_config_parse(struct config *conf)
}
}
static void uh_listener_cb(struct uloop_fd *u, unsigned int events);
static int uh_socket_bind(fd_set *serv_fds, int *max_fd,
const char *host, const char *port,
struct addrinfo *hints, int do_tls,
@ -221,6 +218,9 @@ static int uh_socket_bind(fd_set *serv_fds, int *max_fd,
fd_cloexec(sock);
*max_fd = max(*max_fd, sock);
l->fd.cb = uh_listener_cb;
uloop_fd_add(&l->fd, ULOOP_READ | ULOOP_WRITE);
bound++;
continue;
@ -237,7 +237,7 @@ static int uh_socket_bind(fd_set *serv_fds, int *max_fd,
static struct http_request * uh_http_header_parse(struct client *cl,
char *buffer, int buflen)
{
char *method = &buffer[0];
char *method = buffer;
char *path = NULL;
char *version = NULL;
@ -248,9 +248,7 @@ static struct http_request * uh_http_header_parse(struct client *cl,
int i;
int hdrcount = 0;
static struct http_request req;
memset(&req, 0, sizeof(req));
struct http_request *req = &cl->request;
/* terminate initial header line */
@ -282,15 +280,15 @@ static struct http_request * uh_http_header_parse(struct client *cl,
switch(method[0])
{
case 'G':
req.method = UH_HTTP_MSG_GET;
req->method = UH_HTTP_MSG_GET;
break;
case 'H':
req.method = UH_HTTP_MSG_HEAD;
req->method = UH_HTTP_MSG_HEAD;
break;
case 'P':
req.method = UH_HTTP_MSG_POST;
req->method = UH_HTTP_MSG_POST;
break;
}
}
@ -304,7 +302,7 @@ static struct http_request * uh_http_header_parse(struct client *cl,
}
else
{
req.url = path;
req->url = path;
}
/* check version */
@ -317,9 +315,13 @@ static struct http_request * uh_http_header_parse(struct client *cl,
}
else
{
req.version = strtof(&version[5], NULL);
req->version = strtof(&version[5], NULL);
}
D("SRV: %s %s HTTP/%.1f\n",
(req->method == UH_HTTP_MSG_POST) ? "POST" :
(req->method == UH_HTTP_MSG_GET) ? "GET" : "HEAD",
req->url, req->version);
/* process header fields */
for (i = (int)(headers - buffer); i < buflen; i++)
@ -330,10 +332,12 @@ static struct http_request * uh_http_header_parse(struct client *cl,
buffer[i] = 0;
/* store */
if ((hdrcount + 1) < array_size(req.headers))
if ((hdrcount + 1) < array_size(req->headers))
{
req.headers[hdrcount++] = hdrname;
req.headers[hdrcount++] = hdrdata;
D("SRV: HTTP: %s: %s\n", hdrname, hdrdata);
req->headers[hdrcount++] = hdrname;
req->headers[hdrcount++] = hdrdata;
hdrname = hdrdata = NULL;
}
@ -341,6 +345,7 @@ static struct http_request * uh_http_header_parse(struct client *cl,
/* too large */
else
{
D("SRV: HTTP: header too big (too many headers)\n");
uh_http_response(cl, 413, "Request Entity Too Large");
return NULL;
}
@ -365,8 +370,8 @@ static struct http_request * uh_http_header_parse(struct client *cl,
}
/* valid enough */
req.redirect_status = 200;
return &req;
req->redirect_status = 200;
return req;
}
/* Malformed request */
@ -377,64 +382,43 @@ static struct http_request * uh_http_header_parse(struct client *cl,
static struct http_request * uh_http_header_recv(struct client *cl)
{
static char buffer[UH_LIMIT_MSGHEAD];
char *bufptr = &buffer[0];
char *bufptr = cl->httpbuf.buf;
char *idxptr = NULL;
struct timeval timeout;
fd_set reader;
ssize_t blen = sizeof(buffer)-1;
ssize_t blen = sizeof(cl->httpbuf)-1;
ssize_t rlen = 0;
memset(buffer, 0, sizeof(buffer));
memset(bufptr, 0, sizeof(cl->httpbuf));
while (blen > 0)
{
FD_ZERO(&reader);
FD_SET(cl->socket, &reader);
/* receive data */
ensure_out(rlen = uh_tcp_recv(cl, bufptr, blen));
D("SRV: Client(%d) peek(%d) = %d\n", cl->fd.fd, blen, rlen);
/* fail after 0.1s */
timeout.tv_sec = 0;
timeout.tv_usec = 100000;
/* check whether fd is readable */
if (select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0)
if (rlen <= 0)
{
/* receive data */
ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen));
if ((idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)))
{
ensure_out(rlen = uh_tcp_recv(cl, bufptr,
(int)(idxptr - bufptr) + 4));
/* header read complete ... */
blen -= rlen;
return uh_http_header_parse(cl, buffer,
sizeof(buffer) - blen - 1);
}
else
{
ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen));
/* unexpected eof - #7904 */
if (rlen == 0)
return NULL;
blen -= rlen;
bufptr += rlen;
}
}
else
{
/* invalid request (unexpected eof/timeout) */
D("SRV: Client(%d) dead [%s]\n", cl->fd.fd, strerror(errno));
return NULL;
}
blen -= rlen;
bufptr += rlen;
if ((idxptr = strfind(cl->httpbuf.buf, sizeof(cl->httpbuf.buf),
"\r\n\r\n", 4)))
{
/* header read complete ... */
cl->httpbuf.ptr = idxptr + 4;
cl->httpbuf.len = bufptr - cl->httpbuf.ptr;
return uh_http_header_parse(cl, cl->httpbuf.buf,
(cl->httpbuf.ptr - cl->httpbuf.buf));
}
}
/* request entity too large */
D("SRV: HTTP: header too big (buffer exceeded)\n");
uh_http_response(cl, 413, "Request Entity Too Large");
out:
@ -456,197 +440,276 @@ static int uh_path_match(const char *prefix, const char *url)
}
#endif
static void uh_dispatch_request(struct client *cl, struct http_request *req,
struct path_info *pin)
static bool uh_dispatch_request(struct client *cl, struct http_request *req)
{
#ifdef HAVE_CGI
struct path_info *pin;
struct interpreter *ipr = NULL;
struct config *conf = cl->server->conf;
if (uh_path_match(cl->server->conf->cgi_prefix, pin->name) ||
(ipr = uh_interpreter_lookup(pin->phys)))
#ifdef HAVE_LUA
/* Lua request? */
if (conf->lua_state &&
uh_path_match(conf->lua_prefix, req->url))
{
uh_cgi_request(cl, req, pin, ipr);
return conf->lua_request(cl, conf->lua_state);
}
else
#endif
#ifdef HAVE_UBUS
/* ubus request? */
if (conf->ubus_state &&
uh_path_match(conf->ubus_prefix, req->url))
{
uh_file_request(cl, req, pin);
return conf->ubus_request(cl, conf->ubus_state);
}
else
#endif
/* dispatch request */
if ((pin = uh_path_lookup(cl, req->url)) != NULL)
{
/* auth ok? */
if (!pin->redirected && uh_auth_check(cl, req, pin))
{
#ifdef HAVE_CGI
if (uh_path_match(conf->cgi_prefix, pin->name) ||
(ipr = uh_interpreter_lookup(pin->phys)) != NULL)
{
return uh_cgi_request(cl, pin, ipr);
}
#endif
return uh_file_request(cl, pin);
}
}
/* 404 - pass 1 */
else
{
/* Try to invoke an error handler */
if ((pin = uh_path_lookup(cl, conf->error_handler)) != NULL)
{
/* auth ok? */
if (uh_auth_check(cl, req, pin))
{
req->redirect_status = 404;
#ifdef HAVE_CGI
if (uh_path_match(conf->cgi_prefix, pin->name) ||
(ipr = uh_interpreter_lookup(pin->phys)) != NULL)
{
return uh_cgi_request(cl, pin, ipr);
}
#endif
return uh_file_request(cl, pin);
}
}
/* 404 - pass 2 */
else
{
uh_http_sendhf(cl, 404, "Not Found", "No such file or directory");
}
}
return false;
}
static void uh_client_cb(struct uloop_fd *u, unsigned int events);
static void uh_listener_cb(struct uloop_fd *u, unsigned int events)
{
int new_fd;
struct listener *serv;
struct client *cl;
struct config *conf;
serv = container_of(u, struct listener, fd);
conf = serv->conf;
/* defer client if maximum number of requests is exceeded */
if (serv->n_clients >= conf->max_requests)
return;
/* handle new connections */
if ((new_fd = accept(u->fd, NULL, 0)) != -1)
{
D("SRV: Server(%d) accept => Client(%d)\n", u->fd, new_fd);
/* add to global client list */
if ((cl = uh_client_add(new_fd, serv)) != NULL)
{
/* add client socket to global fdset */
uloop_fd_add(&cl->fd, ULOOP_READ | ULOOP_WRITE);
#ifdef HAVE_TLS
/* setup client tls context */
if (conf->tls)
{
if (conf->tls_accept(cl) < 1)
{
D("SRV: Client(%d) SSL handshake failed, drop\n", new_fd);
/* remove from global client list */
uh_client_remove(cl);
return;
}
}
#endif
cl->fd.cb = uh_client_cb;
fd_cloexec(new_fd);
}
/* insufficient resources */
else
{
fprintf(stderr, "uh_client_add(): Cannot allocate memory\n");
close(new_fd);
}
}
}
static void uh_mainloop(struct config *conf, fd_set serv_fds, int max_fd)
static void uh_child_cb(struct uloop_process *p, int rv)
{
/* master file descriptor list */
fd_set used_fds, read_fds;
struct client *cl = container_of(p, struct client, proc);
/* working structs */
struct http_request *req;
struct path_info *pin;
struct client *cl;
D("SRV: Client(%d) child(%d) is dead\n", cl->fd.fd, cl->proc.pid);
/* maximum file descriptor number */
int new_fd, cur_fd = 0;
cl->dead = true;
cl->fd.eof = true;
uh_client_cb(&cl->fd, ULOOP_READ | ULOOP_WRITE);
}
/* clear the master and temp sets */
FD_ZERO(&used_fds);
FD_ZERO(&read_fds);
static void uh_kill9_cb(struct uloop_timeout *t)
{
struct client *cl = container_of(t, struct client, timeout);
/* backup server descriptor set */
used_fds = serv_fds;
/* loop */
while (run)
if (!kill(cl->proc.pid, 0))
{
/* create a working copy of the used fd set */
read_fds = used_fds;
D("SRV: Client(%d) child(%d) kill(SIGKILL)...\n",
cl->fd.fd, cl->proc.pid);
/* sleep until socket activity */
if (select(max_fd + 1, &read_fds, NULL, NULL, NULL) == -1)
kill(cl->proc.pid, SIGKILL);
}
}
static void uh_timeout_cb(struct uloop_timeout *t)
{
struct client *cl = container_of(t, struct client, timeout);
D("SRV: Client(%d) child(%d) timed out\n", cl->fd.fd, cl->proc.pid);
if (!kill(cl->proc.pid, 0))
{
D("SRV: Client(%d) child(%d) kill(SIGTERM)...\n",
cl->fd.fd, cl->proc.pid);
kill(cl->proc.pid, SIGTERM);
cl->timeout.cb = uh_kill9_cb;
uloop_timeout_set(&cl->timeout, 1000);
}
}
static void uh_client_cb(struct uloop_fd *u, unsigned int events)
{
int i;
struct client *cl;
struct config *conf;
struct http_request *req;
cl = container_of(u, struct client, fd);
conf = cl->server->conf;
D("SRV: Client(%d) enter callback\n", u->fd);
/* undispatched yet */
if (!cl->dispatched)
{
/* we have no headers yet and this was a write event, ignore... */
if (!(events & ULOOP_READ))
{
perror("select()");
exit(1);
D("SRV: Client(%d) ignoring write event before headers\n", u->fd);
return;
}
/* run through the existing connections looking for data to be read */
for (cur_fd = 0; cur_fd <= max_fd; cur_fd++)
/* attempt to receive and parse headers */
if (!(req = uh_http_header_recv(cl)))
{
/* is a socket managed by us */
if (FD_ISSET(cur_fd, &read_fds))
D("SRV: Client(%d) failed to receive header\n", u->fd);
uh_client_shutdown(cl);
return;
}
/* process expect headers */
foreach_header(i, req->headers)
{
if (strcasecmp(req->headers[i], "Expect"))
continue;
if (strcasecmp(req->headers[i+1], "100-continue"))
{
/* is one of our listen sockets */
if (FD_ISSET(cur_fd, &serv_fds))
{
/* handle new connections */
if ((new_fd = accept(cur_fd, NULL, 0)) != -1)
{
/* add to global client list */
if ((cl = uh_client_add(new_fd, uh_listener_lookup(cur_fd))) != NULL)
{
#ifdef HAVE_TLS
/* setup client tls context */
if (conf->tls)
{
if (conf->tls_accept(cl) < 1)
{
fprintf(stderr,
"tls_accept failed, "
"connection dropped\n");
D("SRV: Client(%d) unknown expect header (%s)\n",
u->fd, req->headers[i+1]);
/* close client socket */
close(new_fd);
uh_http_response(cl, 417, "Precondition Failed");
uh_client_shutdown(cl);
return;
}
else
{
D("SRV: Client(%d) sending HTTP/1.1 100 Continue\n", u->fd);
/* remove from global client list */
uh_client_remove(new_fd);
continue;
}
}
#endif
/* add client socket to global fdset */
FD_SET(new_fd, &used_fds);
fd_cloexec(new_fd);
max_fd = max(max_fd, new_fd);
}
/* insufficient resources */
else
{
fprintf(stderr,
"uh_client_add(): "
"Cannot allocate memory\n");
close(new_fd);
}
}
}
/* is a client socket */
else
{
if (!(cl = uh_client_lookup(cur_fd)))
{
/* this should not happen! */
fprintf(stderr,
"uh_client_lookup(): No entry for fd %i!\n",
cur_fd);
goto cleanup;
}
/* parse message header */
if ((req = uh_http_header_recv(cl)) != NULL)
{
/* RFC1918 filtering required? */
if (conf->rfc1918_filter &&
sa_rfc1918(&cl->peeraddr) &&
!sa_rfc1918(&cl->servaddr))
{
uh_http_sendhf(cl, 403, "Forbidden",
"Rejected request from RFC1918 IP "
"to public server address");
}
else
#ifdef HAVE_LUA
/* Lua request? */
if (conf->lua_state &&
uh_path_match(conf->lua_prefix, req->url))
{
conf->lua_request(cl, req, conf->lua_state);
}
else
#endif
/* dispatch request */
if ((pin = uh_path_lookup(cl, req->url)) != NULL)
{
/* auth ok? */
if (!pin->redirected && uh_auth_check(cl, req, pin))
uh_dispatch_request(cl, req, pin);
}
/* 404 */
else
{
/* Try to invoke an error handler */
pin = uh_path_lookup(cl, conf->error_handler);
if (pin && uh_auth_check(cl, req, pin))
{
req->redirect_status = 404;
uh_dispatch_request(cl, req, pin);
}
else
{
uh_http_sendhf(cl, 404, "Not Found",
"No such file or directory");
}
}
}
#ifdef HAVE_TLS
/* free client tls context */
if (conf->tls)
conf->tls_close(cl);
#endif
cleanup:
/* close client socket */
close(cur_fd);
FD_CLR(cur_fd, &used_fds);
/* remove from global client list */
uh_client_remove(cur_fd);
}
uh_http_sendf(cl, NULL, "HTTP/1.1 100 Continue\r\n\r\n");
cl->httpbuf.len = 0; /* client will re-send the body */
break;
}
}
/* RFC1918 filtering */
if (conf->rfc1918_filter &&
sa_rfc1918(&cl->peeraddr) && !sa_rfc1918(&cl->servaddr))
{
uh_http_sendhf(cl, 403, "Forbidden",
"Rejected request from RFC1918 IP "
"to public server address");
uh_client_shutdown(cl);
return;
}
/* dispatch request */
if (!uh_dispatch_request(cl, req))
{
D("SRV: Client(%d) failed to dispach request\n", u->fd);
uh_client_shutdown(cl);
return;
}
/* request handler spawned a child, register handler */
if (cl->proc.pid)
{
D("SRV: Client(%d) child(%d) spawned\n", u->fd, cl->proc.pid);
cl->proc.cb = uh_child_cb;
uloop_process_add(&cl->proc);
cl->timeout.cb = uh_timeout_cb;
uloop_timeout_set(&cl->timeout, conf->script_timeout * 1000);
}
/* header processing complete */
D("SRV: Client(%d) dispatched\n", u->fd);
cl->dispatched = true;
return;
}
#ifdef HAVE_LUA
/* destroy the Lua state */
if (conf->lua_state != NULL)
conf->lua_close(conf->lua_state);
#endif
if (!cl->cb(cl))
{
D("SRV: Client(%d) response callback signalized EOF\n", u->fd);
uh_client_shutdown(cl);
return;
}
}
#ifdef HAVE_TLS
@ -710,9 +773,6 @@ int main (int argc, char **argv)
struct sigaction sa;
struct config conf;
/* signal mask */
sigset_t ss;
/* maximum file descriptor number */
int cur_fd, max_fd = 0;
@ -736,25 +796,17 @@ int main (int argc, char **argv)
FD_ZERO(&serv_fds);
/* handle SIGPIPE, SIGINT, SIGTERM, SIGCHLD */
/* handle SIGPIPE, SIGINT, SIGTERM */
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sa.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &sa, NULL);
sa.sa_handler = uh_sigchld;
sigaction(SIGCHLD, &sa, NULL);
sa.sa_handler = uh_sigterm;
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
/* defer SIGCHLD */
sigemptyset(&ss);
sigaddset(&ss, SIGCHLD);
sigprocmask(SIG_BLOCK, &ss, NULL);
/* prepare addrinfo hints */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
@ -765,9 +817,10 @@ int main (int argc, char **argv)
memset(&conf, 0, sizeof(conf));
memset(bind, 0, sizeof(bind));
uloop_init();
while ((opt = getopt(argc, argv,
"fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:x:i:t:T:A:")) > 0)
"fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:n:x:i:t:T:A:u:U:")) > 0)
{
switch(opt)
{
@ -894,6 +947,10 @@ int main (int argc, char **argv)
conf.rfc1918_filter = 1;
break;
case 'n':
conf.max_requests = atoi(optarg);
break;
#ifdef HAVE_CGI
/* cgi prefix */
case 'x':
@ -928,6 +985,18 @@ int main (int argc, char **argv)
break;
#endif
#ifdef HAVE_UBUS
/* ubus prefix */
case 'u':
conf.ubus_prefix = optarg;
break;
/* ubus socket */
case 'U':
conf.ubus_socket = optarg;
break;
#endif
#if defined(HAVE_CGI) || defined(HAVE_LUA)
/* script timeout */
case 't':
@ -1002,16 +1071,21 @@ int main (int argc, char **argv)
" -S Do not follow symbolic links outside of the docroot\n"
" -D Do not allow directory listings, send 403 instead\n"
" -R Enable RFC1918 filter\n"
" -n count Maximum allowed number of concurrent requests\n"
#ifdef HAVE_LUA
" -l string URL prefix for Lua handler, default is '/lua'\n"
" -L file Lua handler script, omit to disable Lua\n"
#endif
#ifdef HAVE_UBUS
" -u string URL prefix for HTTP/JSON handler, default is '/ubus'\n"
" -U file Override ubus socket path\n"
#endif
#ifdef HAVE_CGI
" -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
" -i .ext=path Use interpreter at path for files with the given extension\n"
#endif
#if defined(HAVE_CGI) || defined(HAVE_LUA)
" -t seconds CGI and Lua script timeout in seconds, default is 60\n"
#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
" -t seconds CGI, Lua and UBUS script timeout in seconds, default is 60\n"
#endif
" -T seconds Network timeout in seconds, default is 30\n"
" -d string URL decode given string\n"
@ -1053,11 +1127,15 @@ int main (int argc, char **argv)
/* config file */
uh_config_parse(&conf);
/* default max requests */
if (conf.max_requests <= 0)
conf.max_requests = 3;
/* default network timeout */
if (conf.network_timeout <= 0)
conf.network_timeout = 30;
#if defined(HAVE_CGI) || defined(HAVE_LUA)
#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
/* default script timeout */
if (conf.script_timeout <= 0)
conf.script_timeout = 60;
@ -1103,6 +1181,36 @@ int main (int argc, char **argv)
}
#endif
#ifdef HAVE_UBUS
/* load ubus plugin */
if (!(lib = dlopen("uhttpd_ubus.so", RTLD_LAZY | RTLD_GLOBAL)))
{
fprintf(stderr,
"Notice: Unable to load ubus plugin - disabling ubus support! "
"(Reason: %s)\n", dlerror());
}
else
{
/* resolve functions */
if (!(conf.ubus_init = dlsym(lib, "uh_ubus_init")) ||
!(conf.ubus_close = dlsym(lib, "uh_ubus_close")) ||
!(conf.ubus_request = dlsym(lib, "uh_ubus_request")))
{
fprintf(stderr,
"Error: Failed to lookup required symbols "
"in ubus plugin: %s\n", dlerror()
);
exit(1);
}
/* default ubus prefix */
if (!conf.ubus_prefix)
conf.ubus_prefix = "/ubus";
conf.ubus_state = conf.ubus_init(&conf);
}
#endif
/* fork (if not disabled) */
if (!nofork)
{
@ -1134,7 +1242,7 @@ int main (int argc, char **argv)
}
/* server main loop */
uh_mainloop(&conf, serv_fds, max_fd);
uloop_run();
#ifdef HAVE_LUA
/* destroy the Lua state */
@ -1142,5 +1250,11 @@ int main (int argc, char **argv)
conf.lua_close(conf.lua_state);
#endif
#ifdef HAVE_UBUS
/* destroy the ubus state */
if (conf.ubus_state != NULL)
conf.ubus_close(conf.ubus_state);
#endif
return 0;
}

111
package/uhttpd/src/uhttpd.h
View file

@ -20,6 +20,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
@ -36,6 +37,9 @@
#include <errno.h>
#include <dlfcn.h>
#include <libubox/list.h>
#include <libubox/uloop.h>
#ifdef HAVE_LUA
#include <lua.h>
@ -50,6 +54,12 @@
#define SOL_TCP 6
#endif
#ifdef DEBUG
#define D(...) fprintf(stderr, __VA_ARGS__)
#else
#define D(...)
#endif
#define UH_LIMIT_MSGHEAD 4096
#define UH_LIMIT_HEADERS 64
@ -60,10 +70,14 @@
#define UH_HTTP_MSG_HEAD 1
#define UH_HTTP_MSG_POST 2
#define UH_SOCK_CLIENT 0
#define UH_SOCK_SERVER 1
struct listener;
struct client;
struct interpreter;
struct http_request;
struct uh_ubus_state;
struct config {
char docroot[PATH_MAX];
@ -76,6 +90,7 @@ struct config {
int network_timeout;
int rfc1918_filter;
int tcp_keepalive;
int max_requests;
#ifdef HAVE_CGI
char *cgi_prefix;
#endif
@ -85,9 +100,17 @@ struct config {
lua_State *lua_state;
lua_State * (*lua_init) (const struct config *conf);
void (*lua_close) (lua_State *L);
void (*lua_request) (struct client *cl, struct http_request *req, lua_State *L);
bool (*lua_request) (struct client *cl, lua_State *L);
#endif
#if defined(HAVE_CGI) || defined(HAVE_LUA)
#ifdef HAVE_UBUS
char *ubus_prefix;
char *ubus_socket;
void *ubus_state;
struct uh_ubus_state * (*ubus_init) (const struct config *conf);
void (*ubus_close) (struct uh_ubus_state *state);
bool (*ubus_request) (struct client *cl, struct uh_ubus_state *state);
#endif
#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
int script_timeout;
#endif
#ifdef HAVE_TLS
@ -100,41 +123,11 @@ struct config {
void (*tls_free) (struct listener *l);
int (*tls_accept) (struct client *c);
void (*tls_close) (struct client *c);
int (*tls_recv) (struct client *c, void *buf, int len);
int (*tls_send) (struct client *c, void *buf, int len);
int (*tls_recv) (struct client *c, char *buf, int len);
int (*tls_send) (struct client *c, const char *buf, int len);
#endif
};
struct listener {
int socket;
struct sockaddr_in6 addr;
struct config *conf;
#ifdef HAVE_TLS
SSL_CTX *tls;
#endif
struct listener *next;
};
struct client {
int socket;
int peeklen;
char peekbuf[UH_LIMIT_MSGHEAD];
struct listener *server;
struct sockaddr_in6 servaddr;
struct sockaddr_in6 peeraddr;
#ifdef HAVE_TLS
SSL *tls;
#endif
struct client *next;
};
struct auth_realm {
char path[PATH_MAX];
char user[32];
char pass[128];
struct auth_realm *next;
};
struct http_request {
int method;
float version;
@ -150,6 +143,56 @@ struct http_response {
char *headers[UH_LIMIT_HEADERS];
};
struct listener {
struct uloop_fd fd;
int socket;
int n_clients;
struct sockaddr_in6 addr;
struct config *conf;
#ifdef HAVE_TLS
SSL_CTX *tls;
#endif
struct listener *next;
};
struct client {
#ifdef HAVE_TLS
SSL *tls;
#endif
struct uloop_fd fd;
struct uloop_process proc;
struct uloop_timeout timeout;
bool (*cb)(struct client *);
void *priv;
bool dispatched;
bool dead;
struct {
char buf[UH_LIMIT_MSGHEAD];
char *ptr;
int len;
} httpbuf;
struct listener *server;
struct http_request request;
struct http_response response;
struct sockaddr_in6 servaddr;
struct sockaddr_in6 peeraddr;
struct client *next;
};
struct client_light {
#ifdef HAVE_TLS
SSL *tls;
#endif
struct uloop_fd fd;
};
struct auth_realm {
char path[PATH_MAX];
char user[32];
char pass[128];
struct auth_realm *next;
};
#ifdef HAVE_CGI
struct interpreter {
char path[PATH_MAX];