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Diffstat (limited to 'sunrpc/bindrsvprt.c')
-rw-r--r--sunrpc/bindrsvprt.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/sunrpc/bindrsvprt.c b/sunrpc/bindrsvprt.c
index 3745187..023ae17 100644
--- a/sunrpc/bindrsvprt.c
+++ b/sunrpc/bindrsvprt.c
@@ -43,14 +43,15 @@
int
bindresvport (int sd, struct sockaddr_in *sin)
{
- int res;
static short port;
struct sockaddr_in myaddr;
int i;
#define STARTPORT 600
+#define LOWPORT 512
#define ENDPORT (IPPORT_RESERVED - 1)
#define NPORTS (ENDPORT - STARTPORT + 1)
+ static short startport = STARTPORT;
if (sin == (struct sockaddr_in *) 0)
{
@@ -68,17 +69,30 @@ bindresvport (int sd, struct sockaddr_in *sin)
{
port = (__getpid () % NPORTS) + STARTPORT;
}
- res = -1;
- __set_errno (EADDRINUSE);
- for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; ++i)
+ /* Initialize to make gcc happy. */
+ int res = -1;
+
+ int nports = ENDPORT - startport + 1;
+ int endport = ENDPORT;
+ again:
+ for (i = 0; i < nports; ++i)
{
sin->sin_port = htons (port++);
- if (port > ENDPORT)
- {
- port = STARTPORT;
- }
+ if (port > endport)
+ port = startport;
res = __bind (sd, sin, sizeof (struct sockaddr_in));
+ if (res >= 0 || errno != EADDRINUSE)
+ break;
+ }
+
+ if (i == nports && startport != LOWPORT)
+ {
+ startport = LOWPORT;
+ endport = STARTPORT - 1;
+ nports = STARTPORT - LOWPORT;
+ port = LOWPORT + port % (STARTPORT - LOWPORT);
+ goto again;
}
return res;