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basic support for extended communtities

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This commit is contained in:
hannes 2002-07-22 02:55:20 +00:00
parent fd1ef53ef6
commit fa5d6d1083
1 changed files with 68 additions and 5 deletions
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73
print-bgp.c
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@ -33,7 +33,7 @@
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.37 2002-07-18 00:39:12 hannes Exp $";
"@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.38 2002-07-22 02:55:20 hannes Exp $";
#endif
#include <sys/param.h>
@ -63,12 +63,14 @@ struct bgp {
#define BGP_UPDATE 2
#define BGP_NOTIFICATION 3
#define BGP_KEEPALIVE 4
#define BGP_ROUTE_REFRESH 5
static struct tok bgp_msg_values[] = {
{ BGP_OPEN, "Open"},
{ BGP_UPDATE, "Update"},
{ BGP_NOTIFICATION, "Notification"},
{ BGP_KEEPALIVE, "Keepalive"},
{ BGP_ROUTE_REFRESH, "Route Refresh"},
{ 0, NULL}
};
@ -300,6 +302,13 @@ static struct tok bgp_afi_values[] = {
{ 0, NULL},
};
static struct tok bgp_extd_comm_subtype_values[] = {
{ 2, "target"},
{ 3, "origin"},
{ 4, "link-BW"},
{ 0, NULL},
};
static int
decode_prefix4(const u_char *pd, char *buf, u_int buflen)
{
@ -646,8 +655,6 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
safi);
p += 3;
printf("\n\t Withdrawn routes");
while (len - (p - dat) > 0) {
switch (af) {
@ -691,7 +698,7 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
break;
#endif
default:
printf("\n\t no AFI %u decoder",af);
printf("\n\t no AFI %u decoder",af);
print_unknown_data(p-3,"\n\t ",tlen);
advance = 0;
p = dat + len;
@ -701,10 +708,66 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
p += advance;
}
break;
case BGPTYPE_EXTD_COMMUNITIES:
if (len % 8) {
printf("invalid len");
break;
}
while (tlen>0) {
u_int8_t extd_comm,extd_comm_type,extd_comm_subtype;
extd_comm=*p;
extd_comm_type=extd_comm&0x3f;
extd_comm_subtype=*(p+1);
switch(extd_comm_type) {
case 0:
printf("%s%s%s:%u:%s%s",
(extd_comm&0x80) ? "vendor-specific: " : "",
(extd_comm&0x40) ? "non-transitive:" : "",
tok2str(bgp_extd_comm_subtype_values,
"unknown",
extd_comm_subtype&0x3f),
EXTRACT_16BITS(p+2),
getname(p+4),
(tlen>8) ? ", " : "");
break;
case 1:
printf("%s%s%s:%s:%u%s",
(extd_comm&0x80) ? "vendor-specific: " : "",
(extd_comm&0x40) ? "non-transitive:" : "",
tok2str(bgp_extd_comm_subtype_values,
"unknown",
extd_comm_subtype&0x3f),
getname(p+2),
EXTRACT_16BITS(p+6),
(tlen>8) ? ", " : "");
break;
case 2:
printf("%s%s%s:%u:%u%s",
(extd_comm&0x80) ? "vendor-specific: " : "",
(extd_comm&0x40) ? "non-transitive:" : "",
tok2str(bgp_extd_comm_subtype_values,
"unknown",
extd_comm_subtype&0x3f),
EXTRACT_32BITS(p+2),
EXTRACT_16BITS(p+6),
(tlen>8) ? ", " : "");
break;
default:
printf("\n\t no typecode %u decoder",
extd_comm_type);
print_unknown_data(p,"\n\t ",8);
break;
}
tlen -=8;
p +=8;
}
break;
default:
printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
print_unknown_data(p,"\n\t ",tlen);
break;
break;
}
}