diff options
Diffstat (limited to 'pimd/pim_tlv.c')
| -rw-r--r-- | pimd/pim_tlv.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/pimd/pim_tlv.c b/pimd/pim_tlv.c index c578a70d..fc48c888 100644 --- a/pimd/pim_tlv.c +++ b/pimd/pim_tlv.c @@ -559,6 +559,24 @@ int pim_parse_addr_source(const char *ifname, p->u.prefix4 = *(const struct in_addr *) addr; p->prefixlen = mask_len; + /* + RFC 4601: 4.9.1 Encoded Source and Group Address Formats + + Encoded-Source Address + + The mask length MUST be equal to the mask length in bits for + the given Address Family and Encoding Type (32 for IPv4 native + and 128 for IPv6 native). A router SHOULD ignore any messages + received with any other mask length. + */ + if (p->prefixlen != 32) { + char src_str[100]; + pim_inet4_dump("<src?>", p->u.prefix4, src_str, sizeof(src_str)); + zlog_warn("%s: IPv4 bad source address mask: %s/%d", + __PRETTY_FUNCTION__, src_str, p->prefixlen); + return -4; + } + addr += sizeof(struct in_addr); break; @@ -569,7 +587,7 @@ int pim_parse_addr_source(const char *ifname, zlog_warn("%s: unknown source address encoding family=%d from %s on %s", __PRETTY_FUNCTION__, family, src_str, ifname); - return -4; + return -5; } } |