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Add routed support to br2684

Browse source 
Signed-off-by: Juan I. Gonzalez <juan.i.gonzalez at subdown dot net>

SVN-Revision: 10710
This commit is contained in:
Florian Fainelli 2008-04-02 13:00:06 +00:00
parent af4c2c041f
commit add755735a
3 changed files with 1037 additions and 1 deletions
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7
package/br2684ctl/files/br2684ctl
View file

@ -14,11 +14,16 @@ start_daemon() {
config_get vpi "$cfg" vpi
config_get vci "$cfg" vci
config_get encaps "$cfg" encaps
config_get payload "cfg" payload
case "$encaps" in
1|vc) encaps=1;;
*) encaps=0;;
esac
br2684ctl -b -c "$unit" -e "$encaps" -a "${atmdev:+$atmdev.}${vpi:-8}.${vci:-35}"
case "$payload" in
1|bridged) payload=1;;
*) payload=0;;
esac
br2684ctl -b -c "$unit" -e "$encaps" -p "$payload" -a "${atmdev:+$atmdev.}${vpi:-8}.${vci:-35}"
}
start() {

301
package/br2684ctl/patches/101-routed_support.patch Normal file
View file

@ -0,0 +1,301 @@
diff -Nu br2684ctl-20040226.orig/br2684ctl.c br2684ctl.orig/br2684ctl.c
--- br2684ctl-20040226.orig/br2684ctl.c 2008-03-25 22:26:59.000000000 +0000
+++ br2684ctl.orig/br2684ctl.c 2008-03-31 10:11:06.000000000 +0100
@@ -10,6 +10,10 @@
#include <atm.h>
#include <linux/atmdev.h>
#include <linux/atmbr2684.h>
+#ifndef BR2684_FLAG_ROUTED
+#warning "Kernel missing routed support for br2684"
+#define BR2684_FLAG_ROUTED (1<<16) /* payload is routed, not bridged */
+#endif
/* Written by Marcell GAL <cell@sch.bme.hu> to make use of the */
/* ioctls defined in the br2684... kernel patch */
@@ -28,26 +32,35 @@
#define LOG_OPTION LOG_PERROR|LOG_PID
#define LOG_FACILITY LOG_LOCAL2
+struct br2684_params {
+ int itfnum;
+ int encap;
+ int sndbuf;
+ int payload;
+ char *astr; /* temporary */
+ struct atm_qos reqqos;
+};
+
int lastsock, lastitf;
-void fatal(const char *str, int i)
+void fatal(const char *str, int err)
{
- syslog (LOG_ERR,"Fatal: %s",str);
+ syslog (LOG_ERR,"Fatal: %s; %s", str, strerror(err));
exit(-2);
};
void exitFunc(void)
{
- syslog (LOG_NOTICE,"Daemon terminated\n");
+ syslog (LOG_NOTICE,"Daemon terminated");
}
void int_signal(int dummy)
{
- syslog (LOG_INFO,"Killed by a signal\n");
+ syslog (LOG_INFO,"Killed by a signal");
exit(0);
}
@@ -58,7 +71,7 @@
if (num < 0) return -1;
- snprintf(name, 20, "/var/run/nas%d.pid", num);
+ snprintf(name, 32, "/var/run/br2684ctl-nas%d.pid", num);
pidfile = fopen(name, "w");
if (pidfile == NULL) return -1;
fprintf(pidfile, "%d", getpid());
@@ -67,9 +80,9 @@
return 0;
}
-int create_br(char *nstr)
+int create_br(int itfnum, int payload)
{
- int num, err;
+ int err;
if(lastsock<0) {
lastsock = socket(PF_ATMPVC, SOCK_DGRAM, ATM_AAL5);
@@ -78,31 +91,36 @@
syslog(LOG_ERR, "socket creation failed: %s",strerror(errno));
} else {
/* create the device with ioctl: */
- num=atoi(nstr);
- if( num>=0 && num<1234567890){
+ if( itfnum>=0 && itfnum<1234567890){
struct atm_newif_br2684 ni;
ni.backend_num = ATM_BACKEND_BR2684;
ni.media = BR2684_MEDIA_ETHERNET;
+#ifdef BR2684_FLAG_ROUTED
+ if (payload == 0)
+ ni.media |= BR2684_FLAG_ROUTED;
+#endif
ni.mtu = 1500;
- sprintf(ni.ifname, "nas%d", num);
+ sprintf(ni.ifname, "nas%d", itfnum);
err=ioctl (lastsock, ATM_NEWBACKENDIF, &ni);
if (err == 0)
- syslog(LOG_NOTICE, "Interface \"%s\" created sucessfully\n",ni.ifname);
+ syslog(LOG_NOTICE, "Interface \"%s\" created sucessfully",ni.ifname);
else
- syslog(LOG_INFO, "Interface \"%s\" could not be created, reason: %s\n",
+ syslog(LOG_INFO, "Interface \"%s\" could not be created, reason: %s",
ni.ifname,
strerror(errno));
- lastitf=num; /* even if we didn't create, because existed, assign_vcc wil want to know it! */
+ lastitf=itfnum; /* even if we didn't create, because existed,
+ assign_vcc wil want to know it! */
} else {
- syslog(LOG_ERR,"err: strange interface number %d", num );
+ syslog(LOG_ERR,"err: strange interface number %d", itfnum );
}
}
return 0;
}
-int assign_vcc(char *astr, int encap, int bufsize, struct atm_qos qos)
+int assign_vcc(char *astr, int encap, int payload,
+ int bufsize, struct atm_qos qos)
{
int err;
struct sockaddr_atmpvc addr;
@@ -112,21 +130,17 @@
memset(&addr, 0, sizeof(addr));
err=text2atm(astr,(struct sockaddr *)(&addr), sizeof(addr), T2A_PVC);
if (err!=0)
- syslog(LOG_ERR,"Could not parse ATM parameters (error=%d)\n",err);
+ syslog(LOG_ERR,"Could not parse ATM parameters (error=%d)",err);
-#if 0
- addr.sap_family = AF_ATMPVC;
- addr.sap_addr.itf = itf;
- addr.sap_addr.vpi = 0;
- addr.sap_addr.vci = vci;
-#endif
- syslog(LOG_NOTICE,"Communicating over ATM %d.%d.%d, encapsulation: %s\n", addr.sap_addr.itf,
+ syslog(LOG_NOTICE,"Communicating over ATM %d.%d.%d, encapsulation: %s",
+ addr.sap_addr.itf,
addr.sap_addr.vpi,
addr.sap_addr.vci,
encap?"VC mux":"LLC");
if ((fd = socket(PF_ATMPVC, SOCK_DGRAM, ATM_AAL5)) < 0)
- syslog(LOG_ERR,"failed to create socket %d, reason: %s", errno,strerror(errno));
+ syslog(LOG_ERR,"failed to create socket %d, reason: %s",
+ errno,strerror(errno));
if (qos.aal == 0) {
qos.aal = ATM_AAL5;
@@ -137,7 +151,7 @@
}
if ( (err=setsockopt(fd,SOL_SOCKET,SO_SNDBUF, &bufsize ,sizeof(bufsize))) )
- syslog(LOG_ERR,"setsockopt SO_SNDBUF: (%d) %s\n",err, strerror(err));
+ syslog(LOG_ERR,"setsockopt SO_SNDBUF: (%d) %s",err, strerror(err));
if (setsockopt(fd, SOL_ATM, SO_ATMQOS, &qos, sizeof(qos)) < 0)
syslog(LOG_ERR,"setsockopt SO_ATMQOS %d", errno);
@@ -145,7 +159,7 @@
err = connect(fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_atmpvc));
if (err < 0)
- fatal("failed to connect on socket", err);
+ fatal("failed to connect on socket", errno);
/* attach the vcc to device: */
@@ -169,10 +183,30 @@
return fd ;
}
+void start_interface(struct br2684_params* params)
+{
+ if (params->astr==NULL) {
+ syslog(LOG_ERR, "Required ATM parameters not specified.");
+ exit(1);
+ }
+
+ create_br(params->itfnum, params->payload);
+ assign_vcc(params->astr, params->encap, params->payload, params->sndbuf,
+ params->reqqos);
+}
+
void usage(char *s)
{
- printf("usage: %s [-b] [[-c number] [-e 0|1] [-s sndbuf] [-q qos] [-a [itf.]vpi.vci]*]*\n", s);
+ printf("usage: %s [-b] [[-c number] [-e 0|1] [-s sndbuf] [-q qos] [-p 0|1] "
+ "[-a [itf.]vpi.vci]*]*\n"
+ " -b = run in background (daemonize)\n"
+ " -c <num> = use interface nas<num>\n"
+ " -e 0|1 = encapsulation (0=LLC, 1=VC Mux)\n"
+ " -p 0|1 = payload type (0=routed,1=bridged)\n"
+ " -s <num> = set sndbuf (send buffer) size (default 8192)\n"
+ " -a [itf.]vpi.vci = ATM interface no, VPI, VCI\n",
+ s);
exit(1);
}
@@ -180,47 +214,63 @@
int main (int argc, char **argv)
{
- int c, background=0, encap=0, sndbuf=8192;
- struct atm_qos reqqos;
- int itfnum;
+ int c, background=0;
+
+ struct br2684_params params;
+ params.itfnum=-1;
+ params.encap=0;
+ params.sndbuf=8192;
+ params.payload=1;
+ params.astr=NULL;
+ memset(&params.reqqos, 0, sizeof(params.reqqos));
+
lastsock=-1;
lastitf=0;
/* st qos to 0 */
- memset(&reqqos, 0, sizeof(reqqos));
openlog (LOG_NAME,LOG_OPTION,LOG_FACILITY);
if (argc>1)
- while ((c = getopt(argc, argv,"q:a:bc:e:s:?h")) !=EOF)
+ while ((c = getopt(argc, argv,"q:a:bc:e:s:p:?h")) !=EOF)
switch (c) {
case 'q':
printf ("optarg : %s",optarg);
- if (text2qos(optarg,&reqqos,0)) fprintf(stderr,"QOS parameter invalid\n");
+ if (text2qos(optarg,&params.reqqos,0))
+ fprintf(stderr,"QOS parameter invalid\n");
break;
case 'a':
- assign_vcc(optarg, encap, sndbuf, reqqos);
+ params.astr=optarg;
break;
case 'b':
background=1;
break;
case 'c':
- create_br(optarg);
- itfnum = atoi(optarg);
+ /* temporary, to make it work with multiple interfaces: */
+ if (params.itfnum>=0) start_interface(&params);
+ params.itfnum= atoi(optarg);
break;
case 'e':
- encap=(atoi(optarg));
- if(encap<0){
- syslog (LOG_ERR, "invalid encapsulation: %s:\n",optarg);
- encap=0;
+ params.encap=(atoi(optarg));
+ if(params.encap<0){
+ syslog (LOG_ERR, "invalid encapsulation: %s:",optarg);
+ params.encap=0;
}
break;
case 's':
- sndbuf=(atoi(optarg));
- if(sndbuf<0){
- syslog(LOG_ERR, "Invalid sndbuf: %s, using size of 8192 instead\n",optarg);
- sndbuf=8192;
+ params.sndbuf=(atoi(optarg));
+ if(params.sndbuf<0){
+ syslog(LOG_ERR, "Invalid sndbuf: %s, using size of 8192 instead",
+ optarg);
+ params.sndbuf=8192;
}
break;
+ case 'p': /* payload type: routed (0) or bridged (1) */
+#ifdef BR2684_FLAG_ROUTED
+ params.payload = atoi(optarg);
+ break;
+#else
+ syslog(LOG_ERR, "payload option not supported.");
+#endif
case '?':
case 'h':
default:
@@ -231,6 +281,8 @@
if (argc != optind) usage(argv[0]);
+ start_interface(&params);
+
if(lastsock>=0) close(lastsock);
if (background) {
@@ -268,11 +275,11 @@
}
- create_pidfile(itfnum);
+ create_pidfile(params.itfnum);
signal(SIGINT, int_signal);
signal(SIGTERM, int_signal);
- syslog (LOG_INFO, "RFC 1483/2684 bridge daemon started\n");
+ syslog (LOG_INFO, "RFC 1483/2684 bridge daemon started");
atexit (exitFunc);
while (1) pause(); /* to keep the sockets... */

730
target/linux/generic-2.6/patches-2.6.24/601-br2684-routed-support.patch Normal file
View file

@ -0,0 +1,730 @@
diff -Nur linux-2.6.24.2/include/linux/atmbr2684.h linux-2.6.24.2-copy/include/linux/atmbr2684.h
--- linux-2.6.24.2/include/linux/atmbr2684.h 2008-02-11 05:51:11.000000000 +0000
+++ linux-2.6.24.2-copy/include/linux/atmbr2684.h 2008-03-27 01:08:42.000000000 +0000
@@ -14,6 +14,9 @@
#define BR2684_MEDIA_FDDI (3)
#define BR2684_MEDIA_802_6 (4) /* 802.6 */
+ /* used only at device creation: */
+#define BR2684_FLAG_ROUTED (1<<16) /* payload is routed, not bridged */
+
/*
* Is there FCS inbound on this VC? This currently isn't supported.
*/
@@ -36,15 +39,22 @@
#define BR2684_ENCAPS_AUTODETECT (2) /* Unsuported */
/*
+ * Is this VC bridged or routed?
+ */
+
+#define BR2684_PAYLOAD_ROUTED (0)
+#define BR2684_PAYLOAD_BRIDGED (1)
+
+/*
* This is for the ATM_NEWBACKENDIF call - these are like socket families:
* the first element of the structure is the backend number and the rest
* is per-backend specific
*/
struct atm_newif_br2684 {
- atm_backend_t backend_num; /* ATM_BACKEND_BR2684 */
- int media; /* BR2684_MEDIA_* */
- char ifname[IFNAMSIZ];
- int mtu;
+ atm_backend_t backend_num; /* ATM_BACKEND_BR2684 */
+ int media; /* BR2684_MEDIA_*, flags in upper bits */
+ char ifname[IFNAMSIZ];
+ int mtu;
};
/*
@@ -55,10 +65,10 @@
#define BR2684_FIND_BYNUM (1)
#define BR2684_FIND_BYIFNAME (2)
struct br2684_if_spec {
- int method; /* BR2684_FIND_* */
+ int method; /* BR2684_FIND_* */
union {
- char ifname[IFNAMSIZ];
- int devnum;
+ char ifname[IFNAMSIZ];
+ int devnum;
} spec;
};
@@ -68,16 +78,16 @@
* is per-backend specific
*/
struct atm_backend_br2684 {
- atm_backend_t backend_num; /* ATM_BACKEND_BR2684 */
+ atm_backend_t backend_num; /* ATM_BACKEND_BR2684 */
struct br2684_if_spec ifspec;
- int fcs_in; /* BR2684_FCSIN_* */
- int fcs_out; /* BR2684_FCSOUT_* */
- int fcs_auto; /* 1: fcs_{in,out} disabled if no FCS rx'ed */
- int encaps; /* BR2684_ENCAPS_* */
- int has_vpiid; /* 1: use vpn_id - Unsupported */
- __u8 vpn_id[7];
- int send_padding; /* unsupported */
- int min_size; /* we will pad smaller packets than this */
+ int fcs_in; /* BR2684_FCSIN_* */
+ int fcs_out; /* BR2684_FCSOUT_* */
+ int fcs_auto; /* 1: fcs_{in,out} disabled if no FCS rx'ed */
+ int encaps; /* BR2684_ENCAPS_* */
+ int has_vpiid; /* 1: use vpn_id - Unsupported */
+ __u8 vpn_id[7];
+ int send_padding; /* unsupported */
+ int min_size; /* we will pad smaller packets than this */
};
/*
@@ -86,8 +96,8 @@
* efficient per-if in/out filters, this support will be removed
*/
struct br2684_filter {
- __be32 prefix; /* network byte order */
- __be32 netmask; /* 0 = disable filter */
+ __be32 prefix; /* network byte order */
+ __be32 netmask; /* 0 = disable filter */
};
struct br2684_filter_set {
@@ -95,7 +105,13 @@
struct br2684_filter filter;
};
+enum br2684_payload {
+ p_routed = BR2684_PAYLOAD_ROUTED,
+ p_bridged = BR2684_PAYLOAD_BRIDGED,
+};
+
#define BR2684_SETFILT _IOW( 'a', ATMIOC_BACKEND + 0, \
struct br2684_filter_set)
#endif /* _LINUX_ATMBR2684_H */
+
diff -Nur linux-2.6.24.2/net/atm/br2684.c linux-2.6.24.2-copy/net/atm/br2684.c
--- linux-2.6.24.2/net/atm/br2684.c 2008-02-11 05:51:11.000000000 +0000
+++ linux-2.6.24.2-copy/net/atm/br2684.c 2008-03-27 03:24:17.000000000 +0000
@@ -1,8 +1,10 @@
/*
-Experimental ethernet netdevice using ATM AAL5 as underlying carrier
-(RFC1483 obsoleted by RFC2684) for Linux 2.4
-Author: Marcell GAL, 2000, XDSL Ltd, Hungary
-*/
+ * Ethernet netdevice using ATM AAL5 as underlying carrier
+ * (RFC1483 obsoleted by RFC2684) for Linux
+ *
+ * Authors: Marcell GAL, 2000, XDSL Ltd, Hungary
+ * Eric Kinzie, 2006-2007, US Naval Research Laboratory
+ */
#include <linux/module.h>
#include <linux/init.h>
@@ -39,21 +41,35 @@
#define skb_debug(skb) do {} while (0)
#endif
+#define BR2684_ETHERTYPE_LEN 2
+#define BR2684_PAD_LEN 2
+
+#define LLC 0xaa, 0xaa, 0x03
+#define SNAP_BRIDGED 0x00, 0x80, 0xc2
+#define SNAP_ROUTED 0x00, 0x00, 0x00
+#define PID_ETHERNET 0x00, 0x07
+#define ETHERTYPE_IPV4 0x08, 0x00
+#define ETHERTYPE_IPV6 0x86, 0xdd
+#define PAD_BRIDGED 0x00, 0x00
+
+static unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
+static unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
static unsigned char llc_oui_pid_pad[] =
- { 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
-#define PADLEN (2)
+ { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
+static unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
+static unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
enum br2684_encaps {
- e_vc = BR2684_ENCAPS_VC,
+ e_vc = BR2684_ENCAPS_VC,
e_llc = BR2684_ENCAPS_LLC,
};
struct br2684_vcc {
- struct atm_vcc *atmvcc;
+ struct atm_vcc *atmvcc;
struct net_device *device;
- /* keep old push,pop functions for chaining */
- void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
- /* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */
+ /* keep old push, pop functions for chaining */
+ void (*old_push) (struct atm_vcc * vcc, struct sk_buff * skb);
+ /* void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb); */
enum br2684_encaps encaps;
struct list_head brvccs;
#ifdef CONFIG_ATM_BR2684_IPFILTER
@@ -66,9 +82,10 @@
struct net_device *net_dev;
struct list_head br2684_devs;
int number;
- struct list_head brvccs; /* one device <=> one vcc (before xmas) */
+ struct list_head brvccs; /* one device <=> one vcc (before xmas) */
struct net_device_stats stats;
int mac_was_set;
+ enum br2684_payload payload;
};
/*
@@ -84,7 +101,7 @@
static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
{
- return (struct br2684_dev *) net_dev->priv;
+ return (struct br2684_dev *)net_dev->priv;
}
static inline struct net_device *list_entry_brdev(const struct list_head *le)
@@ -94,7 +111,7 @@
static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
{
- return (struct br2684_vcc *) (atmvcc->user_back);
+ return (struct br2684_vcc *)(atmvcc->user_back);
}
static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
@@ -132,10 +149,11 @@
* otherwise false
*/
static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev,
- struct br2684_vcc *brvcc)
+ struct br2684_vcc *brvcc)
{
struct atm_vcc *atmvcc;
int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
+
if (skb_headroom(skb) < minheadroom) {
struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
brvcc->copies_needed++;
@@ -146,23 +164,48 @@
}
skb = skb2;
}
- skb_push(skb, minheadroom);
- if (brvcc->encaps == e_llc)
- skb_copy_to_linear_data(skb, llc_oui_pid_pad, 10);
- else
- memset(skb->data, 0, 2);
+
+ if (brvcc->encaps == e_llc) {
+ if (brdev->payload == p_bridged) {
+ skb_push(skb, sizeof(llc_oui_pid_pad));
+ skb_copy_to_linear_data(skb, llc_oui_pid_pad,
+ sizeof(llc_oui_pid_pad));
+ } else if (brdev->payload == p_routed) {
+ unsigned short prot = ntohs(skb->protocol);
+
+ skb_push(skb, sizeof(llc_oui_ipv4));
+ switch (prot) {
+ case ETH_P_IP:
+ skb_copy_to_linear_data(skb, llc_oui_ipv4,
+ sizeof(llc_oui_ipv4));
+ break;
+ case ETH_P_IPV6:
+ skb_copy_to_linear_data(skb, llc_oui_ipv6,
+ sizeof(llc_oui_ipv6));
+ break;
+ default:
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+ } else {
+ skb_push(skb, 2);
+ if (brdev->payload == p_bridged)
+ memset(skb->data, 0, 2);
+ }
skb_debug(skb);
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
if (!atm_may_send(atmvcc, skb->truesize)) {
- /* we free this here for now, because we cannot know in a higher
- layer whether the skb point it supplied wasn't freed yet.
- now, it always is.
- */
+ /*
+ * We free this here for now, because we cannot know in a higher
+ * layer whether the skb pointer it supplied wasn't freed yet.
+ * Now, it always is.
+ */
dev_kfree_skb(skb);
return 0;
- }
+ }
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
ATM_SKB(skb)->atm_options = atmvcc->atm_options;
brdev->stats.tx_packets++;
@@ -172,10 +215,9 @@
}
static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb,
- struct br2684_dev *brdev)
+ struct br2684_dev *brdev)
{
- return list_empty(&brdev->brvccs) ? NULL :
- list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
+ return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
}
static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
@@ -199,11 +241,10 @@
/*
* We should probably use netif_*_queue() here, but that
* involves added complication. We need to walk before
- * we can run
+ * we can run.
+ *
+ * Don't free here! this pointer might be no longer valid!
*/
- /* don't free here! this pointer might be no longer valid!
- dev_kfree_skb(skb);
- */
brdev->stats.tx_errors++;
brdev->stats.tx_fifo_errors++;
}
@@ -217,12 +258,11 @@
return &BRPRIV(dev)->stats;
}
-
/*
* We remember when the MAC gets set, so we don't override it later with
* the ESI of the ATM card of the first VC
*/
-static int (*my_eth_mac_addr)(struct net_device *, void *);
+static int (*my_eth_mac_addr) (struct net_device *, void *);
static int br2684_mac_addr(struct net_device *dev, void *p)
{
int err = my_eth_mac_addr(dev, p);
@@ -233,7 +273,7 @@
#ifdef CONFIG_ATM_BR2684_IPFILTER
/* this IOCTL is experimental. */
-static int br2684_setfilt(struct atm_vcc *atmvcc, void __user *arg)
+static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg)
{
struct br2684_vcc *brvcc;
struct br2684_filter_set fs;
@@ -243,13 +283,12 @@
if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
/*
* This is really a per-vcc thing, but we can also search
- * by device
+ * by device.
*/
struct br2684_dev *brdev;
read_lock(&devs_lock);
brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
- if (brdev == NULL || list_empty(&brdev->brvccs) ||
- brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
+ if (brdev == NULL || list_empty(&brdev->brvccs) || brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
brvcc = NULL;
else
brvcc = list_entry_brvcc(brdev->brvccs.next);
@@ -267,15 +306,16 @@
packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
{
if (brvcc->filter.netmask == 0)
- return 0; /* no filter in place */
+ return 0; /* no filter in place */
if (type == htons(ETH_P_IP) &&
- (((struct iphdr *) (skb->data))->daddr & brvcc->filter.
+ (((struct iphdr *)(skb->data))->daddr & brvcc->filter.
netmask) == brvcc->filter.prefix)
return 0;
if (type == htons(ETH_P_ARP))
return 0;
- /* TODO: we should probably filter ARPs too.. don't want to have
- * them returning values that don't make sense, or is that ok?
+ /*
+ * TODO: we should probably filter ARPs too.. don't want to have
+ * them returning values that don't make sense, or is that ok?
*/
return 1; /* drop */
}
@@ -299,7 +339,6 @@
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
struct net_device *net_dev = brvcc->device;
struct br2684_dev *brdev = BRPRIV(net_dev);
- int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN;
pr_debug("br2684_push\n");
@@ -320,35 +359,58 @@
atm_return(atmvcc, skb->truesize);
pr_debug("skb from brdev %p\n", brdev);
if (brvcc->encaps == e_llc) {
- /* let us waste some time for checking the encapsulation.
- Note, that only 7 char is checked so frames with a valid FCS
- are also accepted (but FCS is not checked of course) */
- if (memcmp(skb->data, llc_oui_pid_pad, 7)) {
+
+ if (skb->len > 7 && skb->data[7] == 0x01)
+ __skb_trim(skb, skb->len - 4);
+
+ /* accept packets that have "ipv[46]" in the snap header */
+ if ((skb->len >= (sizeof(llc_oui_ipv4)))
+ &&
+ (memcmp
+ (skb->data, llc_oui_ipv4,
+ sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) {
+ if (memcmp
+ (skb->data + 6, ethertype_ipv6,
+ sizeof(ethertype_ipv6)) == 0)
+ skb->protocol = __constant_htons(ETH_P_IPV6);
+ else if (memcmp
+ (skb->data + 6, ethertype_ipv4,
+ sizeof(ethertype_ipv4)) == 0)
+ skb->protocol = __constant_htons(ETH_P_IP);
+ else {
+ brdev->stats.rx_errors++;
+ dev_kfree_skb(skb);
+ return;
+ }
+ skb_pull(skb, sizeof(llc_oui_ipv4));
+ skb_reset_network_header(skb);
+ skb->pkt_type = PACKET_HOST;
+ /*
+ * Let us waste some time for checking the encapsulation.
+ * Note, that only 7 char is checked so frames with a valid FCS
+ * are also accepted (but FCS is not checked of course).
+ */
+ } else if ((skb->len >= sizeof(llc_oui_pid_pad)) &&
+ (memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
+ skb_pull(skb, sizeof(llc_oui_pid_pad));
+ skb->protocol = eth_type_trans(skb, net_dev);
+ } else {
brdev->stats.rx_errors++;
dev_kfree_skb(skb);
return;
}
- /* Strip FCS if present */
- if (skb->len > 7 && skb->data[7] == 0x01)
- __skb_trim(skb, skb->len - 4);
} else {
- plen = PADLEN + ETH_HLEN; /* pad, dstmac,srcmac, ethtype */
/* first 2 chars should be 0 */
if (*((u16 *) (skb->data)) != 0) {
brdev->stats.rx_errors++;
dev_kfree_skb(skb);
return;
}
- }
- if (skb->len < plen) {
- brdev->stats.rx_errors++;
- dev_kfree_skb(skb); /* dev_ not needed? */
- return;
+ skb_pull(skb, BR2684_PAD_LEN + ETH_HLEN); /* pad, dstmac, srcmac, ethtype */
+ skb->protocol = eth_type_trans(skb, net_dev);
}
- skb_pull(skb, plen - ETH_HLEN);
- skb->protocol = eth_type_trans(skb, net_dev);
#ifdef CONFIG_ATM_BR2684_IPFILTER
if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) {
brdev->stats.rx_dropped++;
@@ -372,11 +434,12 @@
netif_rx(skb);
}
-static int br2684_regvcc(struct atm_vcc *atmvcc, void __user *arg)
+/*
+ * Assign a vcc to a dev
+ * Note: we do not have explicit unassign, but look at _push()
+ */
+static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
{
-/* assign a vcc to a dev
-Note: we do not have explicit unassign, but look at _push()
-*/
int err;
struct br2684_vcc *brvcc;
struct sk_buff *skb;
@@ -395,7 +458,7 @@
net_dev = br2684_find_dev(&be.ifspec);
if (net_dev == NULL) {
printk(KERN_ERR
- "br2684: tried to attach to non-existant device\n");
+ "br2684: tried to attach to non-existant device\n");
err = -ENXIO;
goto error;
}
@@ -411,13 +474,15 @@
}
if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO ||
be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps !=
- BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) ||
- be.min_size != 0) {
+ BR2684_ENCAPS_VC
+ && be.encaps !=
+ BR2684_ENCAPS_LLC)
+ || be.min_size != 0) {
err = -EINVAL;
goto error;
}
- pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps,
- brvcc);
+ pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc,
+ be.encaps, brvcc);
if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
unsigned char *esi = atmvcc->dev->esi;
if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
@@ -430,7 +495,7 @@
brvcc->device = net_dev;
brvcc->atmvcc = atmvcc;
atmvcc->user_back = brvcc;
- brvcc->encaps = (enum br2684_encaps) be.encaps;
+ brvcc->encaps = (enum br2684_encaps)be.encaps;
brvcc->old_push = atmvcc->push;
barrier();
atmvcc->push = br2684_push;
@@ -461,7 +526,7 @@
}
__module_get(THIS_MODULE);
return 0;
- error:
+ error:
write_unlock_irq(&devs_lock);
kfree(brvcc);
return err;
@@ -482,25 +547,52 @@
INIT_LIST_HEAD(&brdev->brvccs);
}
-static int br2684_create(void __user *arg)
+static void br2684_setup_routed(struct net_device *netdev)
+{
+ struct br2684_dev *brdev = BRPRIV(netdev);
+ brdev->net_dev = netdev;
+
+ netdev->hard_header_len = 0;
+ my_eth_mac_addr = netdev->set_mac_address;
+ netdev->set_mac_address = br2684_mac_addr;
+ netdev->hard_start_xmit = br2684_start_xmit;
+ netdev->get_stats = br2684_get_stats;
+ netdev->addr_len = 0;
+ netdev->mtu = 1500;
+ netdev->type = ARPHRD_PPP;
+ netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+ netdev->tx_queue_len = 100;
+ INIT_LIST_HEAD(&brdev->brvccs);
+}
+
+static int br2684_create(void __user * arg)
{
int err;
struct net_device *netdev;
struct br2684_dev *brdev;
struct atm_newif_br2684 ni;
+ enum br2684_payload payload;
pr_debug("br2684_create\n");
if (copy_from_user(&ni, arg, sizeof ni)) {
return -EFAULT;
}
+
+ if (ni.media & BR2684_FLAG_ROUTED)
+ payload = p_routed;
+ else
+ payload = p_bridged;
+ ni.media &= 0xffff; /* strip flags */
+
if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) {
return -EINVAL;
}
netdev = alloc_netdev(sizeof(struct br2684_dev),
ni.ifname[0] ? ni.ifname : "nas%d",
- br2684_setup);
+ (payload == p_routed) ?
+ br2684_setup_routed : br2684_setup);
if (!netdev)
return -ENOMEM;
@@ -516,6 +608,7 @@
}
write_lock_irq(&devs_lock);
+ brdev->payload = payload;
brdev->number = list_empty(&br2684_devs) ? 1 :
BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
list_add_tail(&brdev->br2684_devs, &br2684_devs);
@@ -528,16 +621,16 @@
* -ENOIOCTLCMD for any unrecognized ioctl
*/
static int br2684_ioctl(struct socket *sock, unsigned int cmd,
- unsigned long arg)
+ unsigned long arg)
{
struct atm_vcc *atmvcc = ATM_SD(sock);
void __user *argp = (void __user *)arg;
+ atm_backend_t b;
int err;
- switch(cmd) {
+ switch (cmd) {
case ATM_SETBACKEND:
- case ATM_NEWBACKENDIF: {
- atm_backend_t b;
+ case ATM_NEWBACKENDIF:
err = get_user(b, (atm_backend_t __user *) argp);
if (err)
return -EFAULT;
@@ -549,7 +642,6 @@
return br2684_regvcc(atmvcc, argp);
else
return br2684_create(argp);
- }
#ifdef CONFIG_ATM_BR2684_IPFILTER
case BR2684_SETFILT:
if (atmvcc->push != br2684_push)
@@ -557,6 +649,7 @@
if (!capable(CAP_NET_ADMIN))
return -EPERM;
err = br2684_setfilt(atmvcc, argp);
+
return err;
#endif /* CONFIG_ATM_BR2684_IPFILTER */
}
@@ -564,24 +657,25 @@
}
static struct atm_ioctl br2684_ioctl_ops = {
- .owner = THIS_MODULE,
- .ioctl = br2684_ioctl,
+ .owner = THIS_MODULE,
+ .ioctl = br2684_ioctl,
};
-
#ifdef CONFIG_PROC_FS
-static void *br2684_seq_start(struct seq_file *seq, loff_t *pos)
+static void *br2684_seq_start(struct seq_file *seq, loff_t * pos)
+ __acquires(devs_lock)
{
read_lock(&devs_lock);
return seq_list_start(&br2684_devs, *pos);
}
-static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos)
{
return seq_list_next(v, &br2684_devs, pos);
}
static void br2684_seq_stop(struct seq_file *seq, void *v)
+ __releases(devs_lock)
{
read_unlock(&devs_lock);
}
@@ -589,7 +683,7 @@
static int br2684_seq_show(struct seq_file *seq, void *v)
{
const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
- br2684_devs);
+ br2684_devs);
const struct net_device *net_dev = brdev->net_dev;
const struct br2684_vcc *brvcc;
DECLARE_MAC_BUF(mac);
@@ -601,21 +695,19 @@
brdev->mac_was_set ? "set" : "auto");
list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
- seq_printf(seq, " vcc %d.%d.%d: encaps=%s"
- ", failed copies %u/%u"
- "\n", brvcc->atmvcc->dev->number,
- brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
- (brvcc->encaps == e_llc) ? "LLC" : "VC"
- , brvcc->copies_failed
- , brvcc->copies_needed
- );
+ seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s"
+ ", failed copies %u/%u"
+ "\n", brvcc->atmvcc->dev->number,
+ brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
+ (brvcc->encaps == e_llc) ? "LLC" : "VC",
+ (brdev->payload == p_bridged) ? "bridged" : "routed",
+ brvcc->copies_failed, brvcc->copies_needed);
#ifdef CONFIG_ATM_BR2684_IPFILTER
#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
- if (brvcc->filter.netmask != 0)
- seq_printf(seq, " filter=%d.%d.%d.%d/"
- "%d.%d.%d.%d\n",
- bs(prefix), bs(netmask));
+ if (brvcc->filter.netmask != 0)
+ seq_printf(seq, " filter=%d.%d.%d.%d/"
+ "%d.%d.%d.%d\n", bs(prefix), bs(netmask));
#undef bs
#undef b1
#endif /* CONFIG_ATM_BR2684_IPFILTER */
@@ -625,9 +717,9 @@
static const struct seq_operations br2684_seq_ops = {
.start = br2684_seq_start,
- .next = br2684_seq_next,
- .stop = br2684_seq_stop,
- .show = br2684_seq_show,
+ .next = br2684_seq_next,
+ .stop = br2684_seq_stop,
+ .show = br2684_seq_show,
};
static int br2684_proc_open(struct inode *inode, struct file *file)
@@ -636,26 +728,28 @@
}
static const struct file_operations br2684_proc_ops = {
- .owner = THIS_MODULE,
- .open = br2684_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
+ .owner = THIS_MODULE,
+ .open = br2684_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
.release = seq_release,
};
extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
-#endif
+#endif /* CONFIG_PROC_FS */
static int __init br2684_init(void)
{
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *p;
+
if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL)
- return -ENOMEM;
- p->proc_fops = &br2684_proc_ops;
+ return -ENOMEM;
+ p->proc_fops = &br2684_proc_ops;
#endif
- register_atm_ioctl(&br2684_ioctl_ops);
- return 0;
+ register_atm_ioctl(&br2684_ioctl_ops);
+ return 0;
+
}
static void __exit br2684_exit(void)
@@ -689,3 +783,4 @@
MODULE_AUTHOR("Marcell GAL");
MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
MODULE_LICENSE("GPL");
+