u_int32_t bmp_process_packet(char *bmp_packet, u_int32_t len, struct bmp_peer *bmpp)
{
struct bgp_misc_structs *bms;
struct bgp_peer *peer;
char *bmp_packet_ptr = bmp_packet;
u_int32_t pkt_remaining_len, msg_len, msg_start_len;
struct bmp_common_hdr *bch = NULL;
if (!bmpp) return FALSE;
peer = &bmpp->self;
bms = bgp_select_misc_db(peer->type);
if (!bms) return FALSE;
if (len < sizeof(struct bmp_common_hdr)) {
Log(LOG_INFO, "INFO ( %s/%s ): [%s] packet discarded: failed bmp_get_and_check_length() BMP common hdr\n",
config.name, bms->log_str, peer->addr_str);
return FALSE;
}
for (msg_start_len = pkt_remaining_len = len; pkt_remaining_len; msg_start_len = pkt_remaining_len) {
if (!(bch = (struct bmp_common_hdr *) bmp_get_and_check_length(&bmp_packet_ptr, &pkt_remaining_len, sizeof(struct bmp_common_hdr))))
return msg_start_len;
if (bch->version != BMP_V3) {
Log(LOG_INFO, "INFO ( %s/%s ): [%s] packet discarded: BMP version != %u\n",
config.name, bms->log_str, peer->addr_str, BMP_V3);
return FALSE;
}
bmp_common_hdr_get_len(bch, &msg_len);
if (pkt_remaining_len < msg_len) return msg_start_len;
if (bch->type <= BMP_MSG_TYPE_MAX) {
Log(LOG_DEBUG, "DEBUG ( %s/%s ): [%s] [common] type: %s (%u)\n",
config.name, bms->log_str, peer->addr_str, bmp_msg_types[bch->type], bch->type);
}
switch (bch->type) {
case BMP_MSG_ROUTE_MONITOR:
bmp_process_msg_route_monitor(&bmp_packet_ptr, &pkt_remaining_len, bmpp);
break;
case BMP_MSG_STATS:
bmp_process_msg_stats(&bmp_packet_ptr, &pkt_remaining_len, bmpp);
break;
case BMP_MSG_PEER_DOWN:
bmp_process_msg_peer_down(&bmp_packet_ptr, &pkt_remaining_len, bmpp);
break;
case BMP_MSG_PEER_UP:
bmp_process_msg_peer_up(&bmp_packet_ptr, &pkt_remaining_len, bmpp);
break;
case BMP_MSG_INIT:
bmp_process_msg_init(&bmp_packet_ptr, &pkt_remaining_len, msg_len, bmpp);
break;
case BMP_MSG_TERM:
bmp_process_msg_term(&bmp_packet_ptr, &pkt_remaining_len, msg_len, bmpp);
break;
case BMP_MSG_ROUTE_MIRROR:
bmp_process_msg_route_mirror(&bmp_packet_ptr, &pkt_remaining_len, bmpp);
break;
default:
Log(LOG_INFO, "INFO ( %s/%s ): [%s] packet discarded: unknown message type (%u)\n",
config.name, bms->log_str, peer->addr_str, bch->type);
break;
}
if ((msg_start_len - pkt_remaining_len) < msg_len) {
/* let's jump forward: we may have been unable to parse some (sub-)element */
bmp_jump_offset(&bmp_packet_ptr, &pkt_remaining_len, (msg_len - (msg_start_len - pkt_remaining_len)));
}
}
return FALSE;
}
void bmp_process_packet(char *bmp_packet, u_int32_t len, struct bgp_peer *peer)
{
char *bmp_packet_ptr = bmp_packet;
u_int32_t remaining_len, bmp_len;
struct bmp_common_hdr *bch = NULL;
remaining_len = len;
if (!(bch = (struct bmp_common_hdr *) bmp_get_and_check_length(&bmp_packet_ptr, &remaining_len, sizeof(struct bmp_common_hdr)))) {
Log(LOG_INFO, "INFO ( %s/core/BMP ): [Id: %s] packet discarded: failed bmp_get_and_check_length() BMP common hdr\n", config.name, peer->addr_str);
return;
}
if (bch->version != BMP_V3) {
Log(LOG_INFO, "INFO ( %s/core/BMP ): [Id: %s] packet discarded: BMP version != %u\n", config.name, peer->addr_str, BMP_V3);
return;
}
bmp_common_hdr_get_len(bch, &bmp_len);
/*
if (bmp_len != len) {
// Option 1: log only
Log(LOG_DEBUG, "DEBUG ( %s/core/BMP ): [Id: %s] BMP common hdr len (%u) != recv() len (%u)\n",
config.name, peer->addr_str, bmp_len, len);
// Option 2: log and return
Log(LOG_INFO, "INFO ( %s/core/BMP ): [Id: %s] packet discarded: BMP len (%u) != recv() len (%u)\n",
config.name, peer->addr_str, bmp_len, len);
return;
}
*/
if (bch->type <= BMP_MSG_TYPE_MAX) {
Log(LOG_DEBUG, "DEBUG ( %s/core/BMP ): [Id: %s] [common] type: %s (%u)\n",
config.name, peer->addr_str, bmp_msg_types[bch->type], bch->type);
}
switch (bch->type) {
case BMP_MSG_ROUTE:
bmp_process_msg_route(&bmp_packet_ptr, &remaining_len, peer);
break;
case BMP_MSG_STATS:
bmp_process_msg_stats(&bmp_packet_ptr, &remaining_len, peer);
break;
case BMP_MSG_PEER_DOWN:
bmp_process_msg_peer_down(&bmp_packet_ptr, &remaining_len, peer);
break;
case BMP_MSG_PEER_UP:
bmp_process_msg_peer_up(&bmp_packet_ptr, &remaining_len, peer);
break;
case BMP_MSG_INIT:
bmp_process_msg_init(&bmp_packet_ptr, &remaining_len, peer);
break;
case BMP_MSG_TERM:
bmp_process_msg_term(&bmp_packet_ptr, &remaining_len, peer);
break;
default:
Log(LOG_INFO, "INFO ( %s/core/BMP ): [Id: %s] packet discarded: unknown message type (%u)\n", config.name, peer->addr_str, bch->type);
return;
}
}
