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Diffstat (limited to 'bgpd')
-rw-r--r--bgpd/bgp_attr.c108
1 files changed, 54 insertions, 54 deletions
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
index a2d4f4ba..b013c23f 100644
--- a/bgpd/bgp_attr.c
+++ b/bgpd/bgp_attr.c
@@ -63,6 +63,17 @@ static const struct message attr_str [] =
{ BGP_ATTR_AS_PATHLIMIT, "AS_PATHLIMIT" },
};
static const int attr_str_max = sizeof(attr_str)/sizeof(attr_str[0]);
+
+static const struct message attr_flag_str[] =
+{
+ { BGP_ATTR_FLAG_OPTIONAL, "Optional" },
+ { BGP_ATTR_FLAG_TRANS, "Transitive" },
+ { BGP_ATTR_FLAG_PARTIAL, "Partial" },
+ /* bgp_attr_flags_diagnose() relies on this bit being last in this list */
+ { BGP_ATTR_FLAG_EXTLEN, "Extended Length" },
+};
+static const size_t attr_flag_str_max =
+ sizeof (attr_flag_str) / sizeof (attr_flag_str[0]);
static struct hash *cluster_hash;
@@ -754,6 +765,40 @@ bgp_attr_malformed (struct peer *peer, u_char type, u_char flag,
return BGP_ATTR_PARSE_ERROR;
}
+/* Find out what is wrong with the path attribute flag bits and log the error.
+ "Flag bits" here stand for Optional, Transitive and Partial, but not for
+ Extended Length. Checking O/T/P bits at once implies, that the attribute
+ being diagnosed is defined by RFC as either a "well-known" or an "optional,
+ non-transitive" attribute. */
+static void
+bgp_attr_flags_diagnose
+(
+ struct peer * peer,
+ const u_int8_t attr_code,
+ u_int8_t desired_flags, /* how RFC says it must be */
+ u_int8_t real_flags /* on wire */
+)
+{
+ u_char seen = 0, i;
+
+ desired_flags &= ~BGP_ATTR_FLAG_EXTLEN;
+ real_flags &= ~BGP_ATTR_FLAG_EXTLEN;
+ for (i = 0; i <= 2; i++) /* O,T,P, but not E */
+ if
+ (
+ CHECK_FLAG (desired_flags, attr_flag_str[i].key) !=
+ CHECK_FLAG (real_flags, attr_flag_str[i].key)
+ )
+ {
+ zlog (peer->log, LOG_ERR, "%s attribute must%s be flagged as \"%s\"",
+ LOOKUP (attr_str, attr_code),
+ CHECK_FLAG (desired_flags, attr_flag_str[i].key) ? "" : " not",
+ attr_flag_str[i].str);
+ seen = 1;
+ }
+ assert (seen);
+}
+
/* Get origin attribute of the update message. */
static bgp_attr_parse_ret_t
bgp_attr_origin (struct peer *peer, bgp_size_t length,
@@ -771,12 +816,7 @@ bgp_attr_origin (struct peer *peer, bgp_size_t length,
attribute (type, length and value). */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_TRANS)
{
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "ORIGIN attribute must not be flagged as \"optional\" (%u)", flag);
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "ORIGIN attribute must be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "ORIGIN attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_ORIGIN, BGP_ATTR_FLAG_TRANS, flag);
return bgp_attr_malformed (peer, BGP_ATTR_ORIGIN, flag, BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR, startp, total);
}
@@ -978,12 +1018,7 @@ bgp_attr_nexthop (struct peer *peer, bgp_size_t length,
/* Flags check. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_TRANS)
{
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "NEXT_HOP attribute must not be flagged as \"optional\" (%u)", flag);
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "NEXT_HOP attribute must be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "NEXT_HOP attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_NEXT_HOP, BGP_ATTR_FLAG_TRANS, flag);
return bgp_attr_malformed (peer, BGP_ATTR_NEXT_HOP, flag, BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR, startp, total);
}
@@ -1033,12 +1068,7 @@ bgp_attr_med (struct peer *peer, bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_OPTIONAL)
{
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "MULTI_EXIT_DISC attribute must be flagged as \"optional\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "MULTI_EXIT_DISC attribute must not be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "MULTI_EXIT_DISC attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_MULTI_EXIT_DISC, BGP_ATTR_FLAG_OPTIONAL, flag);
return bgp_attr_malformed (peer, BGP_ATTR_MULTI_EXIT_DISC, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
@@ -1073,12 +1103,7 @@ bgp_attr_local_pref (struct peer *peer, bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_TRANS)
{
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "LOCAL_PREF attribute must not be flagged as \"optional\" (%u)", flag);
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "LOCAL_PREF attribute must be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "LOCAL_PREF attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_LOCAL_PREF, BGP_ATTR_FLAG_TRANS, flag);
return bgp_attr_malformed (peer, BGP_ATTR_LOCAL_PREF, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
@@ -1120,12 +1145,7 @@ bgp_attr_atomic (struct peer *peer, bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_TRANS)
{
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "ATOMIC_AGGREGATE attribute must not be flagged as \"optional\" (%u)", flag);
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "ATOMIC_AGGREGATE attribute must be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "ATOMIC_AGGREGATE attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_ATOMIC_AGGREGATE, BGP_ATTR_FLAG_TRANS, flag);
return bgp_attr_malformed (peer, BGP_ATTR_ATOMIC_AGGREGATE, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
@@ -1375,12 +1395,7 @@ bgp_attr_originator_id (struct peer *peer, bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_OPTIONAL)
{
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "ORIGINATOR_ID attribute must be flagged as \"optional\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "ORIGINATOR_ID attribute must not be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "ORIGINATOR_ID attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_ORIGINATOR_ID, BGP_ATTR_FLAG_OPTIONAL, flag);
return bgp_attr_malformed (peer, BGP_ATTR_ORIGINATOR_ID, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
@@ -1414,12 +1429,7 @@ bgp_attr_cluster_list (struct peer *peer, bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_OPTIONAL)
{
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "CLUSTER_LIST attribute must be flagged as \"optional\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "CLUSTER_LIST attribute must not be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "CLUSTER_LIST attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_CLUSTER_LIST, BGP_ATTR_FLAG_OPTIONAL, flag);
return bgp_attr_malformed (peer, BGP_ATTR_CLUSTER_LIST, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
@@ -1463,12 +1473,7 @@ bgp_mp_reach_parse (struct peer *peer, const bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_OPTIONAL)
{
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "MP_REACH_NLRI attribute must be flagged as \"optional\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "MP_REACH_NLRI attribute must not be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "MP_REACH_NLRI attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_MP_REACH_NLRI, BGP_ATTR_FLAG_OPTIONAL, flag);
return bgp_attr_malformed (peer, BGP_ATTR_MP_REACH_NLRI, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
@@ -1606,12 +1611,7 @@ bgp_mp_unreach_parse (struct peer *peer, const bgp_size_t length,
/* Flag checks. */
if ((flag & ~BGP_ATTR_FLAG_EXTLEN) != BGP_ATTR_FLAG_OPTIONAL)
{
- if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
- zlog (peer->log, LOG_ERR, "MP_UNREACH_NLRI attribute must be flagged as \"optional\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
- zlog (peer->log, LOG_ERR, "MP_UNREACH_NLRI attribute must not be flagged as \"transitive\" (%u)", flag);
- if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
- zlog (peer->log, LOG_ERR, "MP_UNREACH_NLRI attribute must not be flagged as \"partial\" (%u)", flag);
+ bgp_attr_flags_diagnose (peer, BGP_ATTR_MP_UNREACH_NLRI, BGP_ATTR_FLAG_OPTIONAL, flag);
return bgp_attr_malformed (peer, BGP_ATTR_MP_UNREACH_NLRI, flag,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-25 17:40:44 +0000