diff options
Diffstat (limited to 'sys/netinet/in_pcb.c')
| -rw-r--r-- | sys/netinet/in_pcb.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/sys/netinet/in_pcb.c b/sys/netinet/in_pcb.c index a2b195ee83a..964e3e00e53 100644 --- a/sys/netinet/in_pcb.c +++ b/sys/netinet/in_pcb.c @@ -1,4 +1,4 @@ -/* $OpenBSD: in_pcb.c,v 1.5 1996/07/29 02:34:29 downsj Exp $ */ +/* $OpenBSD: in_pcb.c,v 1.6 1996/07/29 04:47:21 downsj Exp $ */ /* $NetBSD: in_pcb.c,v 1.25 1996/02/13 23:41:53 christos Exp $ */ /* @@ -181,8 +181,9 @@ in_pcbbind(v, nam) inp->inp_laddr = sin->sin_addr; } if (lport == 0) { - ushort first, last; + u_int16_t first, last, old; int count; + int loopcount = 0; if (inp->inp_flags & INP_HIGHPORT) { first = ipport_hifirstauto; /* sysctl */ @@ -204,15 +205,28 @@ in_pcbbind(v, nam) * We split the two cases (up and down) so that the direction * is not being tested on each round of the loop. */ + +portloop: if (first > last) { /* * counting down */ + if (loopcount == 0) { /* only do this once. */ + old = last; + last += (random() % (first - last)); + } count = first - last; do { - if (count-- <= 0) /* completely used? */ + if (count-- <= 0) { /* completely used? */ + if (loopcount == 0) { + last = old; + loopcount++; + + goto portloop; + } return (EADDRNOTAVAIL); + } --*lastport; if (*lastport > first || *lastport < last) *lastport = first; @@ -223,11 +237,23 @@ in_pcbbind(v, nam) /* * counting up */ + if (loopcount == 0) { /* only do this once. */ + old = first; + + first += (random() % (last - first)); + } count = last - first; do { - if (count-- <= 0) /* completely used? */ + if (count-- <= 0) { /* completely used? */ + if (loopcount == 0) { + first = old; + loopcount++; + + goto portloop; + } return (EADDRNOTAVAIL); + } ++*lastport; if (*lastport < first || *lastport > last) *lastport = first; |