diff options
| -rw-r--r-- | pimd/pim_igmp.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/pimd/pim_igmp.c b/pimd/pim_igmp.c index 069c515971..477cf991b4 100644 --- a/pimd/pim_igmp.c +++ b/pimd/pim_igmp.c @@ -494,6 +494,17 @@ bool pim_igmp_verify_header(struct ip *ip_hdr, size_t len, int igmp_msg_len, } } + if ((msg_type == PIM_IGMP_V3_MEMBERSHIP_REPORT) + || ((msg_type == PIM_IGMP_MEMBERSHIP_QUERY) + && (igmp_msg_len >= IGMP_V3_SOURCES_OFFSET))) { + /* All IGMPv3 messages must be received with TOS set to 0xC0*/ + if (ip_hdr->ip_tos != IPTOS_PREC_INTERNETCONTROL) { + zlog_warn("Received IGMP Packet with invalid TOS %u", + ip_hdr->ip_tos); + return -1; + } + } + return true; } |