diff options
Diffstat (limited to 'bgpd/bgp_packet.c')
| -rw-r--r-- | bgpd/bgp_packet.c | 82 |
1 files changed, 39 insertions, 43 deletions
diff --git a/bgpd/bgp_packet.c b/bgpd/bgp_packet.c index 8de78c75..1d9fcc97 100644 --- a/bgpd/bgp_packet.c +++ b/bgpd/bgp_packet.c @@ -598,7 +598,6 @@ bgp_write (struct thread *thread) struct stream *s; int num; unsigned int count = 0; - int write_errno; /* Yes first of all get peer pointer. */ peer = THREAD_ARG (thread); @@ -611,46 +610,37 @@ bgp_write (struct thread *thread) return 0; } - /* Nonblocking write until TCP output buffer is full. */ - while (1) + s = bgp_write_packet (peer); + if (!s) + return 0; /* nothing to send */ + + sockopt_cork (peer->fd, 1); + + /* Nonblocking write until TCP output buffer is full. */ + do { int writenum; - int val; - - s = bgp_write_packet (peer); - if (! s) - return 0; - - /* XXX: FIXME, the socket should be NONBLOCK from the start - * status shouldnt need to be toggled on each write - */ - val = fcntl (peer->fd, F_GETFL, 0); - fcntl (peer->fd, F_SETFL, val|O_NONBLOCK); /* Number of bytes to be sent. */ writenum = stream_get_endp (s) - stream_get_getp (s); /* Call write() system call. */ num = write (peer->fd, STREAM_PNT (s), writenum); - write_errno = errno; - fcntl (peer->fd, F_SETFL, val); - if (num <= 0) + if (num < 0) { - /* Partial write. */ - if (write_errno == EWOULDBLOCK || write_errno == EAGAIN) - break; + /* write failed either retry needed or error */ + if (ERRNO_IO_RETRY(errno)) + break; - BGP_EVENT_ADD (peer, TCP_fatal_error); + BGP_EVENT_ADD (peer, TCP_fatal_error); return 0; } + if (num != writenum) { + /* Partial write */ stream_forward_getp (s, num); - - if (write_errno == EAGAIN) - break; - - continue; + break; } /* Retrieve BGP packet type. */ @@ -691,13 +681,14 @@ bgp_write (struct thread *thread) /* OK we send packet so delete it. */ bgp_packet_delete (peer); - - if (++count >= BGP_WRITE_PACKET_MAX) - break; } + while (++count < BGP_WRITE_PACKET_MAX && + (s = bgp_write_packet (peer)) != NULL); if (bgp_write_proceed (peer)) BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); + else + sockopt_cork (peer->fd, 0); return 0; } @@ -706,7 +697,7 @@ bgp_write (struct thread *thread) static int bgp_write_notify (struct peer *peer) { - int ret; + int ret, val; u_char type; struct stream *s; @@ -716,7 +707,10 @@ bgp_write_notify (struct peer *peer) return 0; assert (stream_get_endp (s) >= BGP_HEADER_SIZE); - /* I'm not sure fd is writable. */ + /* Put socket in blocking mode. */ + val = fcntl (peer->fd, F_GETFL, 0); + fcntl (peer->fd, F_SETFL, val & ~O_NONBLOCK); + ret = writen (peer->fd, STREAM_DATA (s), stream_get_endp (s)); if (ret <= 0) { @@ -2035,7 +2029,7 @@ bgp_route_refresh_receive (struct peer *peer, bgp_size_t size) * as possible without going beyond the bounds of the entry, * to maximise debug information. */ - int ok ; + int ok; memset (&orfp, 0, sizeof (struct orf_prefix)); common = *p_pnt++; /* after ++: p_pnt <= p_end */ @@ -2047,11 +2041,11 @@ bgp_route_refresh_receive (struct peer *peer, bgp_size_t size) break; } ok = ((p_end - p_pnt) >= sizeof(u_int32_t)) ; - if (ok) + if (!ok) { - memcpy (&seq, p_pnt, sizeof (u_int32_t)); - p_pnt += sizeof (u_int32_t); - orfp.seq = ntohl (seq); + memcpy (&seq, p_pnt, sizeof (u_int32_t)); + p_pnt += sizeof (u_int32_t); + orfp.seq = ntohl (seq); } else p_pnt = p_end ; @@ -2089,16 +2083,17 @@ bgp_route_refresh_receive (struct peer *peer, bgp_size_t size) inet_ntop (orfp.p.family, &orfp.p.u.prefix, buf, BUFSIZ), orfp.p.prefixlen, orfp.ge, orfp.le, ok ? "" : " MALFORMED"); - + if (ok) - ret = prefix_bgp_orf_set (name, afi, &orfp, - (common & ORF_COMMON_PART_DENY ? 0 : 1 ), - (common & ORF_COMMON_PART_REMOVE ? 0 : 1)); + ret = prefix_bgp_orf_set (name, afi, &orfp, + (common & ORF_COMMON_PART_DENY ? 0 : 1 ), + (common & ORF_COMMON_PART_REMOVE ? 0 : 1)); if (!ok || (ret != CMD_SUCCESS)) { if (BGP_DEBUG (normal, NORMAL)) - zlog_debug ("%s Received misformatted prefixlist ORF. Remove All pfxlist", peer->host); + zlog_debug ("%s Received misformatted prefixlist ORF." + " Remove All pfxlist", peer->host); prefix_bgp_orf_remove_all (name); break; } @@ -2283,12 +2278,13 @@ bgp_read_packet (struct peer *peer) return 0; /* Read packet from fd. */ - nbytes = stream_read_unblock (peer->ibuf, peer->fd, readsize); + nbytes = stream_read_try (peer->ibuf, peer->fd, readsize); /* If read byte is smaller than zero then error occured. */ if (nbytes < 0) { - if (errno == EAGAIN) + /* Transient error should retry */ + if (nbytes == -2) return -1; plog_err (peer->log, "%s [Error] bgp_read_packet error: %s", |