uhttpd: - fix parsing of interpreter entries in the config file, fixes serving of static files as .cgi with X-Wrt - better cope with connection aborts, especially during header transfer - fix return value checking of TLS reads and writes, solves some blocking issues
SVN-Revision: 22692
This commit is contained in:
Jo-Philipp Wich
parent
af0ecdebfd
commit
cbdeb30a1b
8 changed files with 141 additions and 108 deletions
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@ -8,7 +8,7 @@
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include $(TOPDIR)/rules.mk
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PKG_NAME:=uhttpd
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PKG_RELEASE:=15
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PKG_RELEASE:=16
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PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
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PKG_BUILD_DEPENDS := libcyassl liblua
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@ -139,7 +139,7 @@ void uh_cgi_request(
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struct client *cl, struct http_request *req,
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struct path_info *pi, struct interpreter *ip
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) {
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int i, hdroff, bufoff;
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int i, hdroff, bufoff, rv;
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int hdrlen = 0;
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int buflen = 0;
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int fd_max = 0;
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@ -376,12 +376,6 @@ void uh_cgi_request(
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memset(hdr, 0, sizeof(hdr));
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timeout.tv_sec = cl->server->conf->script_timeout;
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timeout.tv_usec = 0;
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#define ensure(x) \
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do { if( x < 0 ) goto out; } while(0)
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/* I/O loop, watch our pipe ends and dispatch child reads/writes from/to socket */
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while( 1 )
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{
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@ -391,11 +385,21 @@ void uh_cgi_request(
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FD_SET(rfd[0], &reader);
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FD_SET(wfd[1], &writer);
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timeout.tv_sec = (header_sent < 1) ? cl->server->conf->script_timeout : 3;
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timeout.tv_usec = 0;
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ensure_out(rv = select_intr(fd_max, &reader,
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(content_length > -1) ? &writer : NULL, NULL, &timeout));
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/* timeout */
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if( rv == 0 )
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{
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ensure_out(kill(child, 0));
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}
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/* wait until we can read or write or both */
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if( select_intr(fd_max, &reader,
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(content_length > -1) ? &writer : NULL, NULL,
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(header_sent < 1) ? &timeout : NULL) > 0
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) {
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else if( rv > 0 )
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{
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/* ready to write to cgi program */
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if( FD_ISSET(wfd[1], &writer) )
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{
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@ -403,7 +407,10 @@ void uh_cgi_request(
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if( content_length > 0 )
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{
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/* read it from socket ... */
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if( (buflen = uh_tcp_recv(cl, buf, min(content_length, sizeof(buf)))) > 0 )
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ensure_out(buflen = uh_tcp_recv(cl, buf,
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min(content_length, sizeof(buf))));
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if( buflen > 0 )
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{
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/* ... and write it to child's stdin */
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if( write(wfd[1], buf, buflen) < 0 )
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@ -456,7 +463,7 @@ void uh_cgi_request(
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if( (res = uh_cgi_header_parse(hdr, hdrlen, &hdroff)) != NULL )
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{
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/* write status */
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ensure(uh_http_sendf(cl, NULL,
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ensure_out(uh_http_sendf(cl, NULL,
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"HTTP/%.1f %03d %s\r\n"
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"Connection: close\r\n",
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req->version, res->statuscode,
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@ -466,7 +473,7 @@ void uh_cgi_request(
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if( !uh_cgi_header_lookup(res, "Location") &&
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!uh_cgi_header_lookup(res, "Content-Type")
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) {
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ensure(uh_http_send(cl, NULL,
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ensure_out(uh_http_send(cl, NULL,
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"Content-Type: text/plain\r\n", -1));
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}
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@ -474,32 +481,32 @@ void uh_cgi_request(
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if( (req->version > 1.0) &&
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!uh_cgi_header_lookup(res, "Transfer-Encoding")
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) {
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ensure(uh_http_send(cl, NULL,
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ensure_out(uh_http_send(cl, NULL,
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"Transfer-Encoding: chunked\r\n", -1));
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}
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/* write headers from CGI program */
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foreach_header(i, res->headers)
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{
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ensure(uh_http_sendf(cl, NULL, "%s: %s\r\n",
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ensure_out(uh_http_sendf(cl, NULL, "%s: %s\r\n",
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res->headers[i], res->headers[i+1]));
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}
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/* terminate header */
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ensure(uh_http_send(cl, NULL, "\r\n", -1));
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ensure_out(uh_http_send(cl, NULL, "\r\n", -1));
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/* push out remaining head buffer */
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if( hdroff < hdrlen )
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ensure(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
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ensure_out(uh_http_send(cl, req, &hdr[hdroff], hdrlen - hdroff));
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}
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/* ... failed and head buffer exceeded */
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else if( hdrlen >= sizeof(hdr) )
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{
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ensure(uh_cgi_error_500(cl, req,
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ensure_out(uh_cgi_error_500(cl, req,
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"The CGI program generated an invalid response:\n\n"));
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ensure(uh_http_send(cl, req, hdr, hdrlen));
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ensure_out(uh_http_send(cl, req, hdr, hdrlen));
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}
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/* ... failed but free buffer space, try again */
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@ -510,7 +517,7 @@ void uh_cgi_request(
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/* push out remaining read buffer */
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if( bufoff < buflen )
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ensure(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
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ensure_out(uh_http_send(cl, req, &buf[bufoff], buflen - bufoff));
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header_sent = 1;
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continue;
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@ -518,7 +525,7 @@ void uh_cgi_request(
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/* headers complete, pass through buffer to socket */
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ensure(uh_http_send(cl, req, buf, buflen));
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ensure_out(uh_http_send(cl, req, buf, buflen));
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}
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/* looks like eof from child */
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@ -538,7 +545,7 @@ void uh_cgi_request(
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* build the required headers here.
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*/
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ensure(uh_http_sendf(cl, NULL,
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ensure_out(uh_http_sendf(cl, NULL,
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"HTTP/%.1f 200 OK\r\n"
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"Content-Type: text/plain\r\n"
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"%s\r\n",
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@ -546,11 +553,11 @@ void uh_cgi_request(
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? "Transfer-Encoding: chunked\r\n" : ""
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));
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ensure(uh_http_send(cl, req, hdr, hdrlen));
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ensure_out(uh_http_send(cl, req, hdr, hdrlen));
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}
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/* send final chunk if we're in chunked transfer mode */
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ensure(uh_http_send(cl, req, "", 0));
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ensure_out(uh_http_send(cl, req, "", 0));
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break;
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}
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}
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@ -561,13 +568,13 @@ void uh_cgi_request(
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{
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if( (errno != EINTR) && ! header_sent )
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{
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ensure(uh_http_sendhf(cl, 504, "Gateway Timeout",
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ensure_out(uh_http_sendhf(cl, 504, "Gateway Timeout",
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"The CGI script took too long to produce "
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"a response"));
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}
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/* send final chunk if we're in chunked transfer mode */
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ensure(uh_http_send(cl, req, "", 0));
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ensure_out(uh_http_send(cl, req, "", 0));
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break;
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}
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@ -97,8 +97,6 @@ static char * uh_file_header_lookup(struct http_request *req, const char *name)
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return NULL;
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}
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#define ensure_ret(x) \
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do { if( x < 0 ) return -1; } while(0)
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static int uh_file_response_ok_hdrs(struct client *cl, struct http_request *req, struct stat *s)
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{
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@ -132,7 +130,7 @@ static int uh_file_response_412(struct client *cl, struct http_request *req)
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"Connection: close\r\n", req->version);
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}
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static int uh_file_if_match(struct client *cl, struct http_request *req, struct stat *s)
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static int uh_file_if_match(struct client *cl, struct http_request *req, struct stat *s, int *ok)
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{
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const char *tag = uh_file_mktag(s);
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char *hdr = uh_file_header_lookup(req, "If-Match");
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@ -152,43 +150,44 @@ static int uh_file_if_match(struct client *cl, struct http_request *req, struct
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}
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else if( !strcmp(p, "*") || !strcmp(p, tag) )
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{
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return 1;
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*ok = 1;
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return *ok;
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}
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}
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uh_file_response_412(cl, req);
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return 0;
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*ok = 0;
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ensure_ret(uh_file_response_412(cl, req));
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return *ok;
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}
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return 1;
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*ok = 1;
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return *ok;
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}
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static int uh_file_if_modified_since(struct client *cl, struct http_request *req, struct stat *s)
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static int uh_file_if_modified_since(struct client *cl, struct http_request *req, struct stat *s, int *ok)
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{
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char *hdr = uh_file_header_lookup(req, "If-Modified-Since");
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*ok = 1;
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if( hdr )
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{
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if( uh_file_date2unix(hdr) < s->st_mtime )
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if( uh_file_date2unix(hdr) >= s->st_mtime )
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{
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return 1;
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}
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else
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{
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uh_file_response_304(cl, req, s);
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return 0;
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*ok = 0;
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ensure_ret(uh_file_response_304(cl, req, s));
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}
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}
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return 1;
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return *ok;
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}
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static int uh_file_if_none_match(struct client *cl, struct http_request *req, struct stat *s)
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static int uh_file_if_none_match(struct client *cl, struct http_request *req, struct stat *s, int *ok)
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{
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const char *tag = uh_file_mktag(s);
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char *hdr = uh_file_header_lookup(req, "If-None-Match");
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char *p;
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int i;
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*ok = 1;
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if( hdr )
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{
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@ -203,53 +202,54 @@ static int uh_file_if_none_match(struct client *cl, struct http_request *req, st
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}
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else if( !strcmp(p, "*") || !strcmp(p, tag) )
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{
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*ok = 0;
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if( (req->method == UH_HTTP_MSG_GET) ||
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(req->method == UH_HTTP_MSG_HEAD) )
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uh_file_response_304(cl, req, s);
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ensure_ret(uh_file_response_304(cl, req, s));
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else
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uh_file_response_412(cl, req);
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ensure_ret(uh_file_response_412(cl, req));
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return 0;
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break;
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}
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}
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}
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return 1;
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return *ok;
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}
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static int uh_file_if_range(struct client *cl, struct http_request *req, struct stat *s)
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static int uh_file_if_range(struct client *cl, struct http_request *req, struct stat *s, int *ok)
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{
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char *hdr = uh_file_header_lookup(req, "If-Range");
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*ok = 1;
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if( hdr )
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{
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uh_file_response_412(cl, req);
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return 0;
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*ok = 0;
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ensure_ret(uh_file_response_412(cl, req));
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}
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return 1;
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return *ok;
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}
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static int uh_file_if_unmodified_since(struct client *cl, struct http_request *req, struct stat *s)
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static int uh_file_if_unmodified_since(struct client *cl, struct http_request *req, struct stat *s, int *ok)
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{
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char *hdr = uh_file_header_lookup(req, "If-Unmodified-Since");
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*ok = 1;
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if( hdr )
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{
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if( uh_file_date2unix(hdr) <= s->st_mtime )
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{
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uh_file_response_412(cl, req);
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return 0;
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*ok = 0;
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ensure_ret(uh_file_response_412(cl, req));
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}
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}
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return 1;
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return *ok;
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}
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#define ensure_out(x) \
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do { if( x < 0 ) goto out; } while(0)
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static int uh_file_scandir_filter_dir(const struct dirent *e)
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{
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return strcmp(e->d_name, ".") ? 1 : 0;
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@ -335,6 +335,7 @@ out:
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void uh_file_request(struct client *cl, struct http_request *req, struct path_info *pi)
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{
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int rlen;
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int ok = 1;
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int fd = -1;
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char buf[UH_LIMIT_MSGHEAD];
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@ -342,13 +343,14 @@ void uh_file_request(struct client *cl, struct http_request *req, struct path_in
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if( (pi->stat.st_mode & S_IFREG) && ((fd = open(pi->phys, O_RDONLY)) > 0) )
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{
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/* test preconditions */
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if(
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uh_file_if_modified_since(cl, req, &pi->stat) &&
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uh_file_if_match(cl, req, &pi->stat) &&
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uh_file_if_range(cl, req, &pi->stat) &&
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uh_file_if_unmodified_since(cl, req, &pi->stat) &&
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uh_file_if_none_match(cl, req, &pi->stat)
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) {
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if(ok) ensure_out(uh_file_if_modified_since(cl, req, &pi->stat, &ok));
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if(ok) ensure_out(uh_file_if_match(cl, req, &pi->stat, &ok));
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if(ok) ensure_out(uh_file_if_range(cl, req, &pi->stat, &ok));
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if(ok) ensure_out(uh_file_if_unmodified_since(cl, req, &pi->stat, &ok));
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if(ok) ensure_out(uh_file_if_none_match(cl, req, &pi->stat, &ok));
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if( ok > 0 )
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{
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/* write status */
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ensure_out(uh_file_response_200(cl, req, &pi->stat));
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@ -70,12 +70,14 @@ void uh_tls_client_accept(struct client *c)
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int uh_tls_client_recv(struct client *c, void *buf, int len)
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{
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return SSL_read(c->tls, buf, len);
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int rv = SSL_read(c->tls, buf, len);
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return (rv > 0) ? rv : -1;
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}
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int uh_tls_client_send(struct client *c, void *buf, int len)
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{
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return SSL_write(c->tls, buf, len);
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int rv = SSL_write(c->tls, buf, len);
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return (rv > 0) ? rv : -1;
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}
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void uh_tls_client_close(struct client *c)
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@ -112,6 +112,7 @@ int select_intr(int n, fd_set *r, fd_set *w, fd_set *e, struct timeval *t)
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/* unblock SIGCHLD */
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sigemptyset(&ssn);
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sigaddset(&ssn, SIGCHLD);
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sigaddset(&ssn, SIGPIPE);
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sigprocmask(SIG_UNBLOCK, &ssn, &sso);
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rv = select(n, r, w, e, t);
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@ -193,8 +194,6 @@ int uh_tcp_recv(struct client *cl, char *buf, int len)
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return sz;
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}
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#define ensure(x) \
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do { if( x < 0 ) return -1; } while(0)
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int uh_http_sendhf(struct client *cl, int code, const char *summary, const char *fmt, ...)
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{
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@ -211,14 +210,14 @@ int uh_http_sendhf(struct client *cl, int code, const char *summary, const char
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code, summary
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);
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ensure(uh_tcp_send(cl, buffer, len));
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ensure_ret(uh_tcp_send(cl, buffer, len));
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va_start(ap, fmt);
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len = vsnprintf(buffer, sizeof(buffer), fmt, ap);
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va_end(ap);
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ensure(uh_http_sendc(cl, buffer, len));
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ensure(uh_http_sendc(cl, NULL, 0));
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ensure_ret(uh_http_sendc(cl, buffer, len));
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ensure_ret(uh_http_sendc(cl, NULL, 0));
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return 0;
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}
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@ -235,13 +234,13 @@ int uh_http_sendc(struct client *cl, const char *data, int len)
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if( len > 0 )
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{
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clen = snprintf(chunk, sizeof(chunk), "%X\r\n", len);
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ensure(uh_tcp_send(cl, chunk, clen));
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ensure(uh_tcp_send(cl, data, len));
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ensure(uh_tcp_send(cl, "\r\n", 2));
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ensure_ret(uh_tcp_send(cl, chunk, clen));
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ensure_ret(uh_tcp_send(cl, data, len));
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ensure_ret(uh_tcp_send(cl, "\r\n", 2));
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}
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else
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{
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ensure(uh_tcp_send(cl, "0\r\n\r\n", 5));
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ensure_ret(uh_tcp_send(cl, "0\r\n\r\n", 5));
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}
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return 0;
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@ -259,9 +258,9 @@ int uh_http_sendf(
|
|||
va_end(ap);
|
||||
|
||||
if( (req != NULL) && (req->version > 1.0) )
|
||||
ensure(uh_http_sendc(cl, buffer, len));
|
||||
ensure_ret(uh_http_sendc(cl, buffer, len));
|
||||
else if( len > 0 )
|
||||
ensure(uh_tcp_send(cl, buffer, len));
|
||||
ensure_ret(uh_tcp_send(cl, buffer, len));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -273,9 +272,9 @@ int uh_http_send(
|
|||
len = strlen(buf);
|
||||
|
||||
if( (req != NULL) && (req->version > 1.0) )
|
||||
ensure(uh_http_sendc(cl, buf, len));
|
||||
ensure_ret(uh_http_sendc(cl, buf, len));
|
||||
else if( len > 0 )
|
||||
ensure(uh_tcp_send(cl, buf, len));
|
||||
ensure_ret(uh_tcp_send(cl, buf, len));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -36,6 +36,13 @@
|
|||
#define fd_cloexec(fd) \
|
||||
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC)
|
||||
|
||||
#define ensure_out(x) \
|
||||
do { if((x) < 0) goto out; } while(0)
|
||||
|
||||
#define ensure_ret(x) \
|
||||
do { if((x) < 0) return -1; } while(0)
|
||||
|
||||
|
||||
struct path_info {
|
||||
char *root;
|
||||
char *phys;
|
||||
|
|
|
|||
|
|
@ -96,17 +96,18 @@ static void uh_config_parse(struct config *conf)
|
|||
conf->error_handler = strdup(col1);
|
||||
}
|
||||
#ifdef HAVE_CGI
|
||||
else if( (line[0] == '.') && (strchr(line, ':') != NULL) )
|
||||
else if( (line[0] == '*') && (strchr(line, ':') != NULL) )
|
||||
{
|
||||
if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
|
||||
!(eol = strchr(col1, '\n')) || (*eol++ = 0) )
|
||||
if( !(col1 = strchr(line, '*')) || (*col1++ = 0) ||
|
||||
!(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
|
||||
!(eol = strchr(col2, '\n')) || (*eol++ = 0) )
|
||||
continue;
|
||||
|
||||
if( !uh_interpreter_add(line, col1) )
|
||||
if( !uh_interpreter_add(col1, col2) )
|
||||
{
|
||||
fprintf(stderr,
|
||||
"Unable to add interpreter %s for extension %s: "
|
||||
"Out of memory\n", col1, line
|
||||
"Out of memory\n", col2, col1
|
||||
);
|
||||
}
|
||||
}
|
||||
|
|
@ -126,6 +127,10 @@ static int uh_socket_bind(
|
|||
int status;
|
||||
int bound = 0;
|
||||
|
||||
int tcp_ka_idl = 1;
|
||||
int tcp_ka_int = 1;
|
||||
int tcp_ka_cnt = 3;
|
||||
|
||||
struct listener *l = NULL;
|
||||
struct addrinfo *addrs = NULL, *p = NULL;
|
||||
|
||||
|
|
@ -145,12 +150,22 @@ static int uh_socket_bind(
|
|||
}
|
||||
|
||||
/* "address already in use" */
|
||||
if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) == -1 )
|
||||
if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) )
|
||||
{
|
||||
perror("setsockopt()");
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* TCP keep-alive */
|
||||
if( setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) ||
|
||||
setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, &tcp_ka_idl, sizeof(tcp_ka_idl)) ||
|
||||
setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &tcp_ka_int, sizeof(tcp_ka_int)) ||
|
||||
setsockopt(sock, SOL_TCP, TCP_KEEPCNT, &tcp_ka_cnt, sizeof(tcp_ka_cnt)) )
|
||||
{
|
||||
fprintf(stderr, "Notice: Unable to enable TCP keep-alive: %s\n",
|
||||
strerror(errno));
|
||||
}
|
||||
|
||||
/* required to get parallel v4 + v6 working */
|
||||
if( p->ai_family == AF_INET6 )
|
||||
{
|
||||
|
|
@ -355,7 +370,6 @@ static struct http_request * uh_http_header_recv(struct client *cl)
|
|||
ssize_t blen = sizeof(buffer)-1;
|
||||
ssize_t rlen = 0;
|
||||
|
||||
|
||||
memset(buffer, 0, sizeof(buffer));
|
||||
|
||||
while( blen > 0 )
|
||||
|
|
@ -371,41 +385,37 @@ static struct http_request * uh_http_header_recv(struct client *cl)
|
|||
if( select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0 )
|
||||
{
|
||||
/* receive data */
|
||||
rlen = uh_tcp_peek(cl, bufptr, blen);
|
||||
ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen));
|
||||
|
||||
if( rlen > 0 )
|
||||
if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
|
||||
{
|
||||
if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
|
||||
{
|
||||
blen -= uh_tcp_recv(cl, bufptr, (int)(idxptr - bufptr) + 4);
|
||||
ensure_out(rlen = uh_tcp_recv(cl, bufptr,
|
||||
(int)(idxptr - bufptr) + 4));
|
||||
|
||||
/* header read complete ... */
|
||||
return uh_http_header_parse(cl, buffer, sizeof(buffer) - blen - 1);
|
||||
}
|
||||
else
|
||||
{
|
||||
rlen = uh_tcp_recv(cl, bufptr, rlen);
|
||||
blen -= rlen;
|
||||
bufptr += rlen;
|
||||
}
|
||||
/* header read complete ... */
|
||||
blen -= rlen;
|
||||
return uh_http_header_parse(cl, buffer,
|
||||
sizeof(buffer) - blen - 1);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* invalid request (unexpected eof/timeout) */
|
||||
uh_http_response(cl, 408, "Request Timeout");
|
||||
return NULL;
|
||||
ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen));
|
||||
|
||||
blen -= rlen;
|
||||
bufptr += rlen;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* invalid request (unexpected eof/timeout) */
|
||||
uh_http_response(cl, 408, "Request Timeout");
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* request entity too large */
|
||||
uh_http_response(cl, 413, "Request Entity Too Large");
|
||||
|
||||
out:
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -28,6 +28,7 @@
|
|||
#include <sys/select.h>
|
||||
#include <sys/wait.h>
|
||||
#include <netinet/in.h>
|
||||
#include <netinet/tcp.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <linux/limits.h>
|
||||
#include <netdb.h>
|
||||
|
|
@ -44,6 +45,11 @@
|
|||
#include <openssl/ssl.h>
|
||||
#endif
|
||||
|
||||
/* uClibc... */
|
||||
#ifndef SOL_TCP
|
||||
#define SOL_TCP 6
|
||||
#endif
|
||||
|
||||
|
||||
#define UH_LIMIT_MSGHEAD 4096
|
||||
#define UH_LIMIT_HEADERS 64
|
||||
|
|
|
|||
Loading…
Reference in a new issue