igmpproxy: move to trunk, add myself as maintainer

[openwrt/openwrt.git] / package / network / services / igmpproxy / patches / 001-Send-IGMP-packets-with-IP-Router-Alert-option-RFC-21.patch

diff --git a/package/network/services/igmpproxy/patches/001-Send-IGMP-packets-with-IP-Router-Alert-option-RFC-21.patch b/package/network/services/igmpproxy/patches/001-Send-IGMP-packets-with-IP-Router-Alert-option-RFC-21.patch
new file mode 100644 (file)
index 0000000..ffe1cf1
--- /dev/null
+++ b/package/network/services/igmpproxy/patches/001-Send-IGMP-packets-with-IP-Router-Alert-option-RFC-21.patch
@@ -0,0 +1,79 @@
+From fed8c3db10bc9d3a1e799a774924c00522595d0c Mon Sep 17 00:00:00 2001
+From: Evgeny Yurchenko <evg.yurch@rogers.com>
+Date: Mon, 4 Jan 2010 05:13:59 +0500
+Subject: [PATCH] Send IGMP packets with IP Router Alert option [RFC 2113] included in IP header
+
+---
+ src/igmp.c      |   17 ++++++++++++-----
+ src/igmpproxy.h |    1 +
+ 2 files changed, 13 insertions(+), 5 deletions(-)
+
+diff --git a/src/igmp.c b/src/igmp.c
+index a0cd27d..b547688 100644
+--- a/src/igmp.c
++++ b/src/igmp.c
+@@ -67,7 +67,7 @@ void initIgmp() {
+      * - Checksum (let the kernel fill it in)
+      */
+     ip->ip_v   = IPVERSION;
+-    ip->ip_hl  = sizeof(struct ip) >> 2;
++    ip->ip_hl  = (sizeof(struct ip) + 4) >> 2; /* +4 for Router Alert option */
+     ip->ip_tos = 0xc0;      /* Internet Control */
+     ip->ip_ttl = MAXTTL;    /* applies to unicasts only */
+     ip->ip_p   = IPPROTO_IGMP;
+@@ -213,7 +213,7 @@ void buildIgmp(uint32_t src, uint32_t dst, int type, int code, uint32_t group, i
+     ip                      = (struct ip *)send_buf;
+     ip->ip_src.s_addr       = src;
+     ip->ip_dst.s_addr       = dst;
+-    ip_set_len(ip, MIN_IP_HEADER_LEN + IGMP_MINLEN + datalen);
++    ip_set_len(ip, IP_HEADER_RAOPT_LEN + IGMP_MINLEN + datalen);
+ 
+     if (IN_MULTICAST(ntohl(dst))) {
+         ip->ip_ttl = curttl;
+@@ -221,13 +221,20 @@ void buildIgmp(uint32_t src, uint32_t dst, int type, int code, uint32_t group, i
+         ip->ip_ttl = MAXTTL;
+     }
+ 
+-    igmp                    = (struct igmp *)(send_buf + MIN_IP_HEADER_LEN);
++    /* Add Router Alert option */
++    ((u_char*)send_buf+MIN_IP_HEADER_LEN)[0] = IPOPT_RA;
++    ((u_char*)send_buf+MIN_IP_HEADER_LEN)[1] = 0x04;
++    ((u_char*)send_buf+MIN_IP_HEADER_LEN)[2] = 0x00;
++    ((u_char*)send_buf+MIN_IP_HEADER_LEN)[3] = 0x00;
++
++    igmp                    = (struct igmp *)(send_buf + IP_HEADER_RAOPT_LEN);
+     igmp->igmp_type         = type;
+     igmp->igmp_code         = code;
+     igmp->igmp_group.s_addr = group;
+     igmp->igmp_cksum        = 0;
+     igmp->igmp_cksum        = inetChksum((u_short *)igmp,
+-                                         IGMP_MINLEN + datalen);
++                                         IP_HEADER_RAOPT_LEN + datalen);
++
+ }
+ 
+ /* 
+@@ -257,7 +264,7 @@ void sendIgmp(uint32_t src, uint32_t dst, int type, int code, uint32_t group, in
+ #endif
+     sdst.sin_addr.s_addr = dst;
+     if (sendto(MRouterFD, send_buf,
+-               MIN_IP_HEADER_LEN + IGMP_MINLEN + datalen, 0,
++               IP_HEADER_RAOPT_LEN + IGMP_MINLEN + datalen, 0,
+                (struct sockaddr *)&sdst, sizeof(sdst)) < 0) {
+         if (errno == ENETDOWN)
+             my_log(LOG_ERR, errno, "Sender VIF was down.");
+diff --git a/src/igmpproxy.h b/src/igmpproxy.h
+index 0de7791..4df8a79 100644
+--- a/src/igmpproxy.h
++++ b/src/igmpproxy.h
+@@ -64,6 +64,7 @@
+ #define MAX_IP_PACKET_LEN     576
+ #define MIN_IP_HEADER_LEN     20
+ #define MAX_IP_HEADER_LEN     60
++#define IP_HEADER_RAOPT_LEN   24
+ 
+ #define MAX_MC_VIFS    32     // !!! check this const in the specific includes
+ 
+-- 
+1.7.2.5
+