diff options
Diffstat (limited to 'ospfd/ospf_packet.c')
| -rw-r--r-- | ospfd/ospf_packet.c | 94 |
1 files changed, 48 insertions, 46 deletions
diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c index 80641b49..8b7c63a9 100644 --- a/ospfd/ospf_packet.c +++ b/ospfd/ospf_packet.c @@ -125,6 +125,20 @@ ospf_fifo_push (struct ospf_fifo *fifo, struct ospf_packet *op) fifo->count++; } +/* Add new packet to head of fifo. */ +static void +ospf_fifo_push_head (struct ospf_fifo *fifo, struct ospf_packet *op) +{ + op->next = fifo->head; + + if (fifo->tail == NULL) + fifo->tail = op; + + fifo->head = op; + + fifo->count++; +} + /* Delete first packet from fifo. */ struct ospf_packet * ospf_fifo_pop (struct ospf_fifo *fifo) @@ -199,6 +213,27 @@ ospf_packet_add (struct ospf_interface *oi, struct ospf_packet *op) /* ospf_fifo_debug (oi->obuf); */ } +static void +ospf_packet_add_top (struct ospf_interface *oi, struct ospf_packet *op) +{ + if (!oi->obuf) + { + zlog_err("ospf_packet_add(interface %s in state %d [%s], packet type %s, " + "destination %s) called with NULL obuf, ignoring " + "(please report this bug)!\n", + IF_NAME(oi), oi->state, LOOKUP (ospf_ism_state_msg, oi->state), + ospf_packet_type_str[stream_getc_from(op->s, 1)], + inet_ntoa (op->dst)); + return; + } + + /* Add packet to head of queue. */ + ospf_fifo_push_head (oi->obuf, op); + + /* Debug of packet fifo*/ + /* ospf_fifo_debug (oi->obuf); */ +} + void ospf_packet_delete (struct ospf_interface *oi) { @@ -2967,8 +3002,8 @@ ospf_make_ls_ack (struct ospf_interface *oi, struct list *ack, struct stream *s) return length; } -void -ospf_hello_send_sub (struct ospf_interface *oi, struct in_addr *addr) +static void +ospf_hello_send_sub (struct ospf_interface *oi, in_addr_t addr) { struct ospf_packet *op; u_int16_t length = OSPF_HEADER_SIZE; @@ -2987,10 +3022,12 @@ ospf_hello_send_sub (struct ospf_interface *oi, struct in_addr *addr) /* Set packet length. */ op->length = length; - op->dst.s_addr = addr->s_addr; + op->dst.s_addr = addr; - /* Add packet to the interface output queue. */ - ospf_packet_add (oi, op); + /* Add packet to the top of the interface output queue, so that they + * can't get delayed by things like long queues of LS Update packets + */ + ospf_packet_add_top (oi, op); /* Hook thread to write packet. */ OSPF_ISM_WRITE_ON (oi->ospf); @@ -3021,7 +3058,7 @@ ospf_poll_send (struct ospf_nbr_nbma *nbr_nbma) && oi->state != ISM_DR && oi->state != ISM_Backup) return; - ospf_hello_send_sub (oi, &nbr_nbma->addr); + ospf_hello_send_sub (oi, nbr_nbma->addr.s_addr); } int @@ -3060,7 +3097,7 @@ ospf_hello_reply_timer (struct thread *thread) zlog (NULL, LOG_DEBUG, "NSM[%s:%s]: Timer (hello-reply timer expire)", IF_NAME (nbr->oi), inet_ntoa (nbr->router_id)); - ospf_hello_send_sub (nbr->oi, &nbr->address.u.prefix4); + ospf_hello_send_sub (nbr->oi, nbr->address.u.prefix4.s_addr); return 0; } @@ -3069,27 +3106,10 @@ ospf_hello_reply_timer (struct thread *thread) void ospf_hello_send (struct ospf_interface *oi) { - struct ospf_packet *op; - u_int16_t length = OSPF_HEADER_SIZE; - /* If this is passive interface, do not send OSPF Hello. */ if (OSPF_IF_PASSIVE_STATUS (oi) == OSPF_IF_PASSIVE) return; - op = ospf_packet_new (oi->ifp->mtu); - - /* Prepare OSPF common header. */ - ospf_make_header (OSPF_MSG_HELLO, oi, op->s); - - /* Prepare OSPF Hello body. */ - length += ospf_make_hello (oi, op->s); - - /* Fill OSPF header. */ - ospf_fill_header (oi, op->s, length); - - /* Set packet length. */ - op->length = length; - if (oi->type == OSPF_IFTYPE_NBMA) { struct ospf_neighbor *nbr; @@ -3119,34 +3139,16 @@ ospf_hello_send (struct ospf_interface *oi) if (nbr->priority == 0 && oi->state == ISM_DROther) continue; /* if oi->state == Waiting, send hello to all neighbors */ - { - struct ospf_packet *op_dup; - - op_dup = ospf_packet_dup(op); - op_dup->dst = nbr->address.u.prefix4; - - /* Add packet to the interface output queue. */ - ospf_packet_add (oi, op_dup); - - OSPF_ISM_WRITE_ON (oi->ospf); - } - + ospf_hello_send_sub (oi, nbr->address.u.prefix4.s_addr); } - ospf_packet_free (op); } else { /* Decide destination address. */ if (oi->type == OSPF_IFTYPE_VIRTUALLINK) - op->dst.s_addr = oi->vl_data->peer_addr.s_addr; - else - op->dst.s_addr = htonl (OSPF_ALLSPFROUTERS); - - /* Add packet to the interface output queue. */ - ospf_packet_add (oi, op); - - /* Hook thread to write packet. */ - OSPF_ISM_WRITE_ON (oi->ospf); + ospf_hello_send_sub (oi, oi->vl_data->peer_addr.s_addr); + else + ospf_hello_send_sub (oi, htonl (OSPF_ALLSPFROUTERS)); } } |