* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#include <sys/types.h>
-#include <arpa/inet.h>
-#include <string.h>
+#include <zebra.h>
#include "ldpd.h"
#include "ldp.h"
#include "log.h"
#include "ldpe.h"
+#include "ldp_debug.h"
+
+static int gen_returned_tlvs(struct ibuf *, uint16_t, uint16_t, char *);
+static void log_msg_notification(int, struct nbr *, struct notify_msg *);
void
send_notification_full(struct tcp_conn *tcp, struct notify_msg *nm)
size = LDP_HDR_SIZE + LDP_MSG_SIZE + STATUS_SIZE;
if (nm->flags & F_NOTIF_PW_STATUS)
size += PW_STATUS_TLV_SIZE;
- if (nm->flags & F_NOTIF_FEC) {
- size += TLV_HDR_SIZE;
- switch (nm->fec.type) {
- case MAP_TYPE_PWID:
- size += FEC_PWID_ELM_MIN_LEN;
- if (nm->fec.flags & F_MAP_PW_ID)
- size += sizeof(uint32_t);
- break;
- }
- }
+ if (nm->flags & F_NOTIF_FEC)
+ size += len_fec_tlv(&nm->fec);
+ if (nm->flags & F_NOTIF_RETURNED_TLVS)
+ size += TLV_HDR_SIZE * 2 + nm->rtlvs.length;
if ((buf = ibuf_open(size)) == NULL)
fatal(__func__);
err |= gen_pw_status_tlv(buf, nm->pw_status);
if (nm->flags & F_NOTIF_FEC)
err |= gen_fec_tlv(buf, &nm->fec);
+ if (nm->flags & F_NOTIF_RETURNED_TLVS)
+ err |= gen_returned_tlvs(buf, nm->rtlvs.type, nm->rtlvs.length,
+ nm->rtlvs.data);
if (err) {
ibuf_free(buf);
return;
}
- if (tcp->nbr)
- log_debug("msg-out: notification: lsr-id %s, status %s%s",
- inet_ntoa(tcp->nbr->id), status_code_name(nm->status_code),
- (nm->status_code & STATUS_FATAL) ? " (fatal)" : "");
+ if (tcp->nbr) {
+ log_msg_notification(1, tcp->nbr, nm);
+ nbr_fsm(tcp->nbr, NBR_EVT_PDU_SENT);
+ tcp->nbr->stats.notif_sent++;
+ }
evbuf_enqueue(&tcp->wbuf, buf);
}
/* send a notification without optional tlvs */
void
-send_notification(uint32_t status_code, struct tcp_conn *tcp, uint32_t msg_id,
+send_notification(struct tcp_conn *tcp, uint32_t status_code, uint32_t msg_id,
uint16_t msg_type)
{
struct notify_msg nm;
}
void
-send_notification_nbr(struct nbr *nbr, uint32_t status_code, uint32_t msg_id,
- uint16_t msg_type)
+send_notification_rtlvs(struct nbr *nbr, uint32_t status_code, uint32_t msg_id,
+ uint16_t msg_type, uint16_t tlv_type, uint16_t tlv_len, char *tlv_data)
{
- send_notification(status_code, nbr->tcp, msg_id, msg_type);
- nbr_fsm(nbr, NBR_EVT_PDU_SENT);
+ struct notify_msg nm;
+
+ memset(&nm, 0, sizeof(nm));
+ nm.status_code = status_code;
+ nm.msg_id = msg_id;
+ nm.msg_type = msg_type;
+ /* do not append the given TLV if it's too big (shouldn't happen) */
+ if (tlv_len < 1024) {
+ nm.rtlvs.type = tlv_type;
+ nm.rtlvs.length = tlv_len;
+ nm.rtlvs.data = tlv_data;
+ nm.flags |= F_NOTIF_RETURNED_TLVS;
+ }
+
+ send_notification_full(nbr->tcp, &nm);
}
int
/* Optional Parameters */
while (len > 0) {
struct tlv tlv;
+ uint16_t tlv_type;
uint16_t tlv_len;
if (len < sizeof(tlv)) {
}
memcpy(&tlv, buf, TLV_HDR_SIZE);
+ tlv_type = ntohs(tlv.type);
tlv_len = ntohs(tlv.length);
if (tlv_len + TLV_HDR_SIZE > len) {
session_shutdown(nbr, S_BAD_TLV_LEN, msg.id, msg.type);
buf += TLV_HDR_SIZE;
len -= TLV_HDR_SIZE;
- switch (ntohs(tlv.type)) {
+ switch (tlv_type) {
case TLV_TYPE_EXTSTATUS:
case TLV_TYPE_RETURNEDPDU:
case TLV_TYPE_RETURNEDMSG:
break;
default:
if (!(ntohs(tlv.type) & UNKNOWN_FLAG))
- send_notification_nbr(nbr, S_UNKNOWN_TLV,
- msg.id, msg.type);
+ send_notification_rtlvs(nbr, S_UNKNOWN_TLV,
+ msg.id, msg.type, tlv_type, tlv_len, buf);
/* ignore unknown tlv */
break;
}
len -= tlv_len;
}
- if (nm.status_code == S_PW_STATUS) {
+ /* sanity checks */
+ switch (nm.status_code) {
+ case S_PW_STATUS:
if (!(nm.flags & (F_NOTIF_PW_STATUS|F_NOTIF_FEC))) {
- send_notification_nbr(nbr, S_MISS_MSG,
+ send_notification(nbr->tcp, S_MISS_MSG,
msg.id, msg.type);
return (-1);
}
case MAP_TYPE_PWID:
break;
default:
- send_notification_nbr(nbr, S_BAD_TLV_VAL,
+ send_notification(nbr->tcp, S_BAD_TLV_VAL,
msg.id, msg.type);
return (-1);
}
+ break;
+ case S_ENDOFLIB:
+ if (!(nm.flags & F_NOTIF_FEC)) {
+ send_notification(nbr->tcp, S_MISS_MSG,
+ msg.id, msg.type);
+ return (-1);
+ }
+ if (nm.fec.type != MAP_TYPE_TYPED_WCARD) {
+ send_notification(nbr->tcp, S_BAD_TLV_VAL,
+ msg.id, msg.type);
+ return (-1);
+ }
+ break;
+ default:
+ break;
}
- log_warnx("msg-in: notification: lsr-id %s, status %s%s",
- inet_ntoa(nbr->id), status_code_name(ntohl(st.status_code)),
- (st.status_code & htonl(STATUS_FATAL)) ? " (fatal)" : "");
+ log_msg_notification(0, nbr, &nm);
if (st.status_code & htonl(STATUS_FATAL)) {
if (nbr->state == NBR_STA_OPENSENT)
nbr_start_idtimer(nbr);
+ /*
+ * RFC 5036 - Section 3.5.1.1:
+ * "When an LSR receives a Shutdown message during session
+ * initialization, it SHOULD transmit a Shutdown message and
+ * then close the transport connection".
+ */
+ if (nbr->state != NBR_STA_OPER && nm.status_code == S_SHUTDOWN)
+ send_notification(nbr->tcp, S_SHUTDOWN,
+ msg.id, msg.type);
+
nbr_fsm(nbr, NBR_EVT_CLOSE_SESSION);
return (-1);
}
- if (nm.status_code == S_PW_STATUS)
+ /* lde needs to know about a few notification messages */
+ switch (nm.status_code) {
+ case S_PW_STATUS:
+ case S_ENDOFLIB:
ldpe_imsg_compose_lde(IMSG_NOTIFICATION, nbr->peerid, 0,
&nm, sizeof(nm));
+ break;
+ default:
+ break;
+ }
return (0);
}
return (ibuf_add(buf, &st, STATUS_SIZE));
}
+
+static int
+gen_returned_tlvs(struct ibuf *buf, uint16_t type, uint16_t length,
+ char *tlv_data)
+{
+ struct tlv rtlvs;
+ struct tlv tlv;
+ int err;
+
+ rtlvs.type = htons(TLV_TYPE_RETURNED_TLVS);
+ rtlvs.length = htons(length + TLV_HDR_SIZE);
+ tlv.type = htons(type);
+ tlv.length = htons(length);
+
+ err = ibuf_add(buf, &rtlvs, sizeof(rtlvs));
+ err |= ibuf_add(buf, &tlv, sizeof(tlv));
+ err |= ibuf_add(buf, tlv_data, length);
+
+ return (err);
+}
+
+void
+log_msg_notification(int out, struct nbr *nbr, struct notify_msg *nm)
+{
+ if (nm->status_code & STATUS_FATAL) {
+ debug_msg(out, "notification: lsr-id %s, status %s "
+ "(fatal error)", inet_ntoa(nbr->id),
+ status_code_name(nm->status_code));
+ return;
+ }
+
+ debug_msg(out, "notification: lsr-id %s, status %s",
+ inet_ntoa(nbr->id), status_code_name(nm->status_code));
+ if (nm->flags & F_NOTIF_FEC)
+ debug_msg(out, "notification: fec %s", log_map(&nm->fec));
+ if (nm->flags & F_NOTIF_PW_STATUS)
+ debug_msg(out, "notification: pw-status %s",
+ (nm->pw_status) ? "not forwarding" : "forwarding");
+}
projects / mirror_frr.git / blobdiff