diff options
Diffstat (limited to 'sunrpc/bindrsvprt.c')
| -rw-r--r-- | sunrpc/bindrsvprt.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/sunrpc/bindrsvprt.c b/sunrpc/bindrsvprt.c index 374518716e..023ae1723b 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; |