static int
attr_parse (struct stream *s, u_int16_t len)
{
u_int flag;
u_int type;
u_int16_t length;
u_int16_t lim;
lim = s->getp + len;
printf ("attr_parse s->getp %zd, len %d, lim %d\n", s->getp, len, lim);
while (s->getp < lim)
{
flag = stream_getc (s);
type = stream_getc (s);
if (flag & BGP_ATTR_FLAG_EXTLEN)
length = stream_getw (s);
else
length = stream_getc (s);
printf ("FLAG: %d\n", flag);
printf ("TYPE: %d\n", type);
printf ("Len: %d\n", length);
switch (type)
{
case BGP_ATTR_ORIGIN:
{
u_char origin;
origin = stream_getc (s);
printf ("ORIGIN: %d\n", origin);
}
break;
case BGP_ATTR_AS_PATH:
{
struct aspath *aspath;
aspath = aspath_parse (s, length, 1);
printf ("ASPATH: %s\n", aspath->str);
aspath_free(aspath);
}
break;
case BGP_ATTR_NEXT_HOP:
{
struct in_addr nexthop;
nexthop.s_addr = stream_get_ipv4 (s);
printf ("NEXTHOP: %s\n", inet_ntoa (nexthop));
}
break;
default:
stream_getw_from (s, length);
break;
}
}
return 0;
}
/* make an aspath from a data stream */
static struct aspath *
make_aspath (const u_char *data, size_t len, int use32bit)
{
struct stream *s = NULL;
struct aspath *as;
if (len)
{
s = stream_new (len);
stream_put (s, data, len);
}
as = aspath_parse (s, len, use32bit);
if (s)
stream_free (s);
return as;
}