add FEATURE_UNIX_LOCAL. By Ingo van Lil (inguin AT gmx.de)

diff --git a/libbb/xconnect.c b/libbb/xconnect.c
index f853e95..85f93b6 100644 (file)
--- a/libbb/xconnect.c
+++ b/libbb/xconnect.c
@@ -9,6 +9,7 @@
 
 #include <netinet/in.h>
 #include <net/if.h>
+#include <sys/un.h>
 #include "libbb.h"
 
 void FAST_FUNC setsockopt_reuseaddr(int fd)
@@ -160,13 +161,26 @@ IF_FEATURE_IPV6(sa_family_t af,)
                int ai_flags)
 {
        int rc;
-       len_and_sockaddr *r = NULL;
+       len_and_sockaddr *r;
        struct addrinfo *result = NULL;
        struct addrinfo *used_res;
        const char *org_host = host; /* only for error msg */
        const char *cp;
        struct addrinfo hint;
 
+       if (ENABLE_FEATURE_UNIX_LOCAL && strncmp(host, "local:", 6) == 0) {
+               struct sockaddr_un *sun;
+
+               r = xzalloc(LSA_LEN_SIZE + sizeof(struct sockaddr_un));
+               r->len = sizeof(struct sockaddr_un);
+               r->u.sa.sa_family = AF_UNIX;
+               sun = (struct sockaddr_un *)&r->u.sa;
+               safe_strncpy(sun->sun_path, host + 6, sizeof(sun->sun_path));
+               return r;
+       }
+
+       r = NULL;
+
        /* Ugly parsing of host:addr */
        if (ENABLE_FEATURE_IPV6 && host[0] == '[') {
                /* Even uglier parsing of [xx]:nn */
@@ -188,6 +202,7 @@ IF_FEATURE_IPV6(sa_family_t af,)
        }
        if (cp) { /* points to ":" or "]:" */
                int sz = cp - host + 1;
+
                host = safe_strncpy(alloca(sz), host, sz);
                if (ENABLE_FEATURE_IPV6 && *cp != ':') {
                        cp++; /* skip ']' */
@@ -371,6 +386,13 @@ static char* FAST_FUNC sockaddr2str(const struct sockaddr *sa, int flags)
        int rc;
        socklen_t salen;
 
+       if (ENABLE_FEATURE_UNIX_LOCAL && sa->sa_family == AF_UNIX) {
+               struct sockaddr_un *sun = (struct sockaddr_un *)sa;
+               return xasprintf("local:%.*s",
+                               (int) sizeof(sun->sun_path),
+                               sun->sun_path);
+       }
+
        salen = LSA_SIZEOF_SA;
 #if ENABLE_FEATURE_IPV6
        if (sa->sa_family == AF_INET)

diff --git a/networking/Config.in b/networking/Config.in
index 392afcf..62a21f7 100644 (file)
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -12,6 +12,13 @@ config FEATURE_IPV6
          Enable IPv6 support in busybox.
          This adds IPv6 support in the networking applets.
 
+config FEATURE_UNIX_LOCAL
+       bool "Enable Unix domain socket support"
+       default n
+       help
+         Enable Unix domain socket support in all busybox networking
+         applets.
+
 config FEATURE_PREFER_IPV4_ADDRESS
        bool "Prefer IPv4 addresses from DNS queries"
        default y

diff --git a/networking/nc.c b/networking/nc.c
index e64c998..9c3f116 100644 (file)
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -34,7 +34,6 @@ int nc_main(int argc, char **argv)
        IF_NOT_NC_EXTRA (const) unsigned delay = 0;
        IF_NOT_NC_EXTRA (const int execparam = 0;)
        IF_NC_EXTRA     (char **execparam = NULL;)
-       len_and_sockaddr *lsa;
        fd_set readfds, testfds;
        int opt; /* must be signed (getopt returns -1) */
 
@@ -44,17 +43,17 @@ int nc_main(int argc, char **argv)
                while ((opt = getopt(argc, argv,
                        "" IF_NC_SERVER("lp:") IF_NC_EXTRA("w:i:f:e:") )) > 0
                ) {
-                       if (ENABLE_NC_SERVER && opt=='l')
+                       if (ENABLE_NC_SERVER && opt == 'l')
                                IF_NC_SERVER(do_listen++);
-                       else if (ENABLE_NC_SERVER && opt=='p')
+                       else if (ENABLE_NC_SERVER && opt == 'p')
                                IF_NC_SERVER(lport = bb_lookup_port(optarg, "tcp", 0));
-                       else if (ENABLE_NC_EXTRA && opt=='w')
+                       else if (ENABLE_NC_EXTRA && opt == 'w')
                                IF_NC_EXTRA( wsecs = xatou(optarg));
-                       else if (ENABLE_NC_EXTRA && opt=='i')
+                       else if (ENABLE_NC_EXTRA && opt == 'i')
                                IF_NC_EXTRA( delay = xatou(optarg));
-                       else if (ENABLE_NC_EXTRA && opt=='f')
+                       else if (ENABLE_NC_EXTRA && opt == 'f')
                                IF_NC_EXTRA( cfd = xopen(optarg, O_RDWR));
-                       else if (ENABLE_NC_EXTRA && opt=='e' && optind <= argc) {
+                       else if (ENABLE_NC_EXTRA && opt == 'e' && optind <= argc) {
                                /* We cannot just 'break'. We should let getopt finish.
                                ** Or else we won't be able to find where
                                ** 'host' and 'port' params are
@@ -80,9 +79,12 @@ int nc_main(int argc, char **argv)
                argc -= optind;
                // -l and -f don't mix
                if (do_listen && cfd) bb_show_usage();
-               // Listen or file modes need zero arguments, client mode needs 2
-               if (do_listen || cfd) {
+               // File mode needs need zero arguments, listen mode needs zero or one,
+               // client mode needs one or two
+               if (cfd) {
                        if (argc) bb_show_usage();
+               } else if (do_listen) {
+                       if (argc > 1) bb_show_usage();
                } else {
                        if (!argc || argc > 2) bb_show_usage();
                }
@@ -99,24 +101,20 @@ int nc_main(int argc, char **argv)
 
        if (!cfd) {
                if (do_listen) {
-                       /* create_and_bind_stream_or_die(NULL, lport)
-                        * would've work wonderfully, but we need
-                        * to know lsa */
-                       sfd = xsocket_stream(&lsa);
-                       if (lport)
-                               set_nport(lsa, htons(lport));
-                       setsockopt_reuseaddr(sfd);
-                       xbind(sfd, &lsa->u.sa, lsa->len);
+                       sfd = create_and_bind_stream_or_die(argv[0], lport);
                        xlisten(sfd, do_listen); /* can be > 1 */
+#if 0  /* nc-1.10 does not do this (without -v) */
                        /* If we didn't specify a port number,
                         * query and print it after listen() */
                        if (!lport) {
-                               getsockname(sfd, &lsa->u.sa, &lsa->len);
-                               lport = get_nport(&lsa->u.sa);
+                               len_and_sockaddr lsa;
+                               lsa.len = LSA_SIZEOF_SA;
+                               getsockname(sfd, &lsa.u.sa, &lsa.len);
+                               lport = get_nport(&lsa.u.sa);
                                fdprintf(2, "%d\n", ntohs(lport));
                        }
+#endif
                        close_on_exec_on(sfd);
-                       free(lsa);
  accept_again:
                        cfd = accept(sfd, NULL, 0);
                        if (cfd < 0)

diff --git a/networking/nc_bloaty.c b/networking/nc_bloaty.c
index efe831e..9aaeec1 100644 (file)
--- a/networking/nc_bloaty.c
+++ b/networking/nc_bloaty.c
@@ -377,9 +377,7 @@ create new one, and bind() it. TODO */
                socklen_t x = sizeof(optbuf);
 
                rr = getsockopt(netfd, IPPROTO_IP, IP_OPTIONS, optbuf, &x);
-               if (rr < 0)
-                       bb_perror_msg("getsockopt failed");
-               else if (x) {    /* we've got options, lessee em... */
+               if (rr >= 0 && x) {    /* we've got options, lessee em... */
                        bin2hex(bigbuf_net, optbuf, x);
                        bigbuf_net[2*x] = '\0';
                        fprintf(stderr, "IP options: %s\n", bigbuf_net);
@@ -603,7 +601,10 @@ Debug("got %d from the net, errno %d", rr, errno);
         mobygrams are kinda fun and exercise the reassembler. */
                        if (rr <= 0) {                        /* at end, or fukt, or ... */
                                FD_CLR(STDIN_FILENO, &ding1);                /* disable and close stdin */
-                               close(0);
+                               close(STDIN_FILENO);
+// Does it make sense to shutdown(net_fd, SHUT_WR)
+// to let other side know that we won't write anything anymore?
+// (and what about keeping compat if we do that?)
                        } else {
                                rzleft = rr;
                                zp = bigbuf_in;
@@ -768,7 +769,12 @@ int nc_main(int argc, char **argv)
        setsockopt_reuseaddr(netfd);
        if (o_udpmode)
                socket_want_pktinfo(netfd);
-       xbind(netfd, &ouraddr->u.sa, ouraddr->len);
+       if (!ENABLE_FEATURE_UNIX_LOCAL
+        || o_listen
+        || ouraddr->u.sa.sa_family != AF_UNIX
+       ) {
+               xbind(netfd, &ouraddr->u.sa, ouraddr->len);
+       }
 #if 0
        setsockopt(netfd, SOL_SOCKET, SO_RCVBUF, &o_rcvbuf, sizeof o_rcvbuf);
        setsockopt(netfd, SOL_SOCKET, SO_SNDBUF, &o_sndbuf, sizeof o_sndbuf);