ifupdown: simple code shrink

[oweals/busybox.git] / networking / tcpudp.c

diff --git a/networking/tcpudp.c b/networking/tcpudp.c
index b532e43cd975c62c57bdee228b3edac75cbd4be4..3df6a98d8cd377e23979a8be8f1d8cfc0850b59f 100644 (file)
--- a/networking/tcpudp.c
+++ b/networking/tcpudp.c
@@ -29,6 +29,43 @@
  * - don't know how to retrieve ORIGDST for udp.
  */
 
+//usage:#define tcpsvd_trivial_usage
+//usage:       "[-hEv] [-c N] [-C N[:MSG]] [-b N] [-u USER] [-l NAME] IP PORT PROG"
+/* with not-implemented options: */
+/* //usage:    "[-hpEvv] [-c N] [-C N[:MSG]] [-b N] [-u USER] [-l NAME] [-i DIR|-x CDB] [-t SEC] IP PORT PROG" */
+//usage:#define tcpsvd_full_usage "\n\n"
+//usage:       "Create TCP socket, bind to IP:PORT and listen\n"
+//usage:       "for incoming connection. Run PROG for each connection.\n"
+//usage:     "\n       IP              IP to listen on, 0 = all"
+//usage:     "\n       PORT            Port to listen on"
+//usage:     "\n       PROG ARGS       Program to run"
+//usage:     "\n       -l NAME         Local hostname (else looks up local hostname in DNS)"
+//usage:     "\n       -u USER[:GRP]   Change to user/group after bind"
+//usage:     "\n       -c N            Handle up to N connections simultaneously"
+//usage:     "\n       -b N            Allow a backlog of approximately N TCP SYNs"
+//usage:     "\n       -C N[:MSG]      Allow only up to N connections from the same IP"
+//usage:     "\n                       New connections from this IP address are closed"
+//usage:     "\n                       immediately. MSG is written to the peer before close"
+//usage:     "\n       -h              Look up peer's hostname"
+//usage:     "\n       -E              Don't set up environment variables"
+//usage:     "\n       -v              Verbose"
+//usage:
+//usage:#define udpsvd_trivial_usage
+//usage:       "[-hEv] [-c N] [-u USER] [-l NAME] IP PORT PROG"
+//usage:#define udpsvd_full_usage "\n\n"
+//usage:       "Create UDP socket, bind to IP:PORT and wait\n"
+//usage:       "for incoming packets. Run PROG for each packet,\n"
+//usage:       "redirecting all further packets with same peer ip:port to it.\n"
+//usage:     "\n       IP              IP to listen on, 0 = all"
+//usage:     "\n       PORT            Port to listen on"
+//usage:     "\n       PROG ARGS       Program to run"
+//usage:     "\n       -l NAME         Local hostname (else looks up local hostname in DNS)"
+//usage:     "\n       -u USER[:GRP]   Change to user/group after bind"
+//usage:     "\n       -c N            Handle up to N connections simultaneously"
+//usage:     "\n       -h              Look up peer's hostname"
+//usage:     "\n       -E              Don't set up environment variables"
+//usage:     "\n       -v              Verbose"
+
 #include "libbb.h"
 
 /* Wants <limits.h> etc, thus included after libbb.h: */
@@ -387,7 +424,7 @@ int tcpudpsvd_main(int argc UNUSED_PARAM, char **argv)
                 * already bound in parent! This seems to work in Linux.
                 * (otherwise we can move socket to fd #0 only if bind succeeds) */
                close(0);
-               set_nport(localp, htons(local_port));
+               set_nport(&localp->u.sa, htons(local_port));
                xmove_fd(xsocket(localp->u.sa.sa_family, SOCK_DGRAM, 0), 0);
                setsockopt_reuseaddr(0); /* crucial */
                xbind(0, &localp->u.sa, localp->len);