diff options
Diffstat (limited to 'proto/bgp/attrs.c')
| -rw-r--r-- | proto/bgp/attrs.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c index d85afa8f..b8371f32 100644 --- a/proto/bgp/attrs.c +++ b/proto/bgp/attrs.c @@ -118,7 +118,7 @@ validate_path(struct bgp_proto *p, int as_path, int bs, byte *idata, uint *ileng { int res = 0; u8 *a, *dst; - int len, plen, copy; + int len, plen; dst = a = idata; len = *ilength; @@ -132,15 +132,20 @@ validate_path(struct bgp_proto *p, int as_path, int bs, byte *idata, uint *ileng if (len < plen) return -1; + if (a[1] == 0) + { + log(L_WARN "%s: %s_PATH attribute contains empty segment, skipping it", + p->p.name, as_path ? "AS" : "AS4"); + goto skip; + } + switch (a[0]) { case AS_PATH_SET: - copy = 1; res++; break; case AS_PATH_SEQUENCE: - copy = 1; res += a[1]; break; @@ -154,20 +159,17 @@ validate_path(struct bgp_proto *p, int as_path, int bs, byte *idata, uint *ileng log(L_WARN "%s: %s_PATH attribute contains AS_CONFED_* segment, skipping segment", p->p.name, as_path ? "AS" : "AS4"); - copy = 0; - break; + goto skip; default: return -1; } - if (copy) - { - if (dst != a) - memmove(dst, a, plen); - dst += plen; - } + if (dst != a) + memmove(dst, a, plen); + dst += plen; + skip: len -= plen; a += plen; } |