nc_bloaty: support -ll and -lk. Closes 2245
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
a14f319805
commit
de6f148006
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@ -63,6 +63,12 @@
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//usage: " -e PROG Run PROG after connect (must be last)"
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//usage: IF_NC_SERVER(
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//usage: "\n -l Listen mode, for inbound connects"
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//usage: "\n -lk With -e, provides persistent server"
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/* -ll does the same as -lk, but its our extension, while -k is BSD'd,
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* presumably more widely known. Therefore we advertise it, not -ll.
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* I would like to drop -ll support, but our "small" nc supports it,
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* and Rob uses it.
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*/
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//usage: )
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//usage: "\n -p PORT Local port"
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//usage: "\n -s ADDR Local address"
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@ -166,18 +172,14 @@ enum {
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OPT_v = (1 << 4),
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OPT_w = (1 << 5),
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OPT_l = (1 << 6) * ENABLE_NC_SERVER,
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OPT_i = (1 << (6+ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA,
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OPT_o = (1 << (7+ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA,
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OPT_z = (1 << (8+ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA,
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OPT_k = (1 << 7) * ENABLE_NC_SERVER,
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OPT_i = (1 << (7+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA,
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OPT_o = (1 << (8+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA,
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OPT_z = (1 << (9+2*ENABLE_NC_SERVER)) * ENABLE_NC_EXTRA,
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};
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#define o_nflag (option_mask32 & OPT_n)
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#define o_udpmode (option_mask32 & OPT_u)
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#if ENABLE_NC_SERVER
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#define o_listen (option_mask32 & OPT_l)
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#else
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#define o_listen 0
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#endif
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#if ENABLE_NC_EXTRA
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#define o_ofile (option_mask32 & OPT_o)
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#define o_zero (option_mask32 & OPT_z)
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@ -298,7 +300,7 @@ static int connect_w_timeout(int fd)
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incoming and returns an open connection *from* someplace. If we were
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given host/port args, any connections from elsewhere are rejected. This
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in conjunction with local-address binding should limit things nicely... */
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static void dolisten(void)
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static void dolisten(int is_persistent, char **proggie)
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{
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int rr;
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@ -371,6 +373,7 @@ create new one, and bind() it. TODO */
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xconnect(netfd, &remend.u.sa, ouraddr->len);
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} else {
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/* TCP */
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another:
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arm(o_wait); /* wrap this in a timer, too; 0 = forever */
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if (setjmp(jbuf) == 0) {
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again:
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@ -405,6 +408,19 @@ create new one, and bind() it. TODO */
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unarm();
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} else
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bb_error_msg_and_die("timeout");
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if (is_persistent && proggie) {
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/* -l -k -e PROG */
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signal(SIGCHLD, SIG_IGN); /* no zombies please */
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if (xvfork() != 0) {
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/* parent: go back and accept more connections */
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close(rr);
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goto another;
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}
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/* child */
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signal(SIGCHLD, SIG_DFL);
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}
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xmove_fd(rr, netfd); /* dump the old socket, here's our new one */
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/* find out what address the connection was *to* on our end, in case we're
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doing a listen-on-any on a multihomed machine. This allows one to
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@ -454,6 +470,9 @@ create new one, and bind() it. TODO */
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if (!o_nflag)
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free(remhostname);
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}
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if (proggie)
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doexec(proggie);
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}
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/* udptest:
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@ -730,6 +749,7 @@ int nc_main(int argc UNUSED_PARAM, char **argv)
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char *themdotted = themdotted; /* for compiler */
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char **proggie;
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int x;
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unsigned cnt_l = 0;
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unsigned o_lport = 0;
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INIT_G();
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@ -760,7 +780,7 @@ int nc_main(int argc UNUSED_PARAM, char **argv)
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if (proggie[0][0] == '-') {
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char *optpos = *proggie + 1;
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/* Skip all valid opts w/o params */
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optpos = optpos + strspn(optpos, "nuv"IF_NC_SERVER("l")IF_NC_EXTRA("z"));
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optpos = optpos + strspn(optpos, "nuv"IF_NC_SERVER("lk")IF_NC_EXTRA("z"));
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if (*optpos == 'e' && !optpos[1]) {
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*optpos = '\0';
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proggie++;
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@ -774,17 +794,21 @@ int nc_main(int argc UNUSED_PARAM, char **argv)
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e_found:
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// -g -G -t -r deleted, unimplemented -a deleted too
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opt_complementary = "?2:vv:w+"; /* max 2 params; -v is a counter; -w N */
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getopt32(argv, "np:s:uvw:" IF_NC_SERVER("l")
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opt_complementary = "?2:vv:ll:w+"; /* max 2 params; -v and -l are counters; -w N */
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getopt32(argv, "np:s:uvw:" IF_NC_SERVER("lk")
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IF_NC_EXTRA("i:o:z"),
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&str_p, &str_s, &o_wait
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IF_NC_EXTRA(, &str_i, &str_o), &o_verbose);
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IF_NC_EXTRA(, &str_i, &str_o), &o_verbose IF_NC_SERVER(, &cnt_l));
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argv += optind;
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#if ENABLE_NC_EXTRA
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if (option_mask32 & OPT_i) /* line-interval time */
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o_interval = xatou_range(str_i, 1, 0xffff);
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#endif
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#if ENABLE_NC_SERVER
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//if (option_mask32 & OPT_l) /* listen mode */
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if (option_mask32 & OPT_k) /* persistent server mode */
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cnt_l = 2;
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#endif
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//if (option_mask32 & OPT_n) /* numeric-only, no DNS lookups */
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//if (option_mask32 & OPT_o) /* hexdump log */
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if (option_mask32 & OPT_p) { /* local source port */
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@ -833,7 +857,7 @@ int nc_main(int argc UNUSED_PARAM, char **argv)
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if (o_udpmode)
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socket_want_pktinfo(netfd);
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if (!ENABLE_FEATURE_UNIX_LOCAL
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|| o_listen
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|| cnt_l != 0 /* listen */
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|| ouraddr->u.sa.sa_family != AF_UNIX
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) {
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xbind(netfd, &ouraddr->u.sa, ouraddr->len);
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@ -862,11 +886,9 @@ int nc_main(int argc UNUSED_PARAM, char **argv)
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xmove_fd(xopen(str_o, O_WRONLY|O_CREAT|O_TRUNC), ofd);
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#endif
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if (o_listen) {
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dolisten();
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if (cnt_l != 0) {
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dolisten((cnt_l - 1), proggie);
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/* dolisten does its own connect reporting */
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if (proggie) /* -e given? */
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doexec(proggie);
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x = readwrite(); /* it even works with UDP! */
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} else {
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/* Outbound connects. Now we're more picky about args... */
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