diff options
Diffstat (limited to 'package/network/services/igmpproxy/patches/001-Send-IGMP-packets-with-IP-Router-Alert-option-RFC-21.patch')
| -rw-r--r-- | package/network/services/igmpproxy/patches/001-Send-IGMP-packets-with-IP-Router-Alert-option-RFC-21.patch | 79 |
1 files changed, 79 insertions, 0 deletions
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 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 + |