server: Implement --listen-address for control service.

[paraslash.git] / server.c

diff --git a/server.c b/server.c
index 8c2a78f4a62ed4fd32a0a95174aa03bb88178ec7..9c11b23cbb4801f15e08ae3c1a0a559322b38578 100644 (file)
--- a/server.c
+++ b/server.c
@@ -45,6 +45,7 @@
 #include "afh.h"
 #include "string.h"
 #include "afs.h"
+#include "net.h"
 #include "server.h"
 #include "list.h"
 #include "send.h"
@@ -52,7 +53,6 @@
 #include "vss.h"
 #include "config.h"
 #include "close_on_fork.h"
-#include "net.h"
 #include "daemon.h"
 #include "ipc.h"
 #include "fd.h"
@@ -108,8 +108,9 @@ pid_t afs_pid = 0;
 
 /** The task responsible for server command handling. */
 struct server_command_task {
-       /** TCP port on which para_server listens for connections. */
-       int listen_fd;
+       unsigned num_listen_fds; /* only one by default */
+       /** TCP socket(s) on which para_server listens for connections. */
+       int *listen_fds;
        /** Copied from para_server's main function. */
        int argc;
        /** Argument vector passed to para_server's main function. */
@@ -185,7 +186,6 @@ void parse_config_or_die(bool reload)
        struct lls_parse_result *cf_lpr, *merged_lpr;
        char *home = para_homedir();
 
-       daemon_close_log();
        if (OPT_GIVEN(CONFIG_FILE))
                cf = para_strdup(OPT_STRING_VAL(CONFIG_FILE));
        else
@@ -347,20 +347,22 @@ static void init_signal_task(void)
 
 static void command_pre_select(struct sched *s, void *context)
 {
+       unsigned n;
        struct server_command_task *sct = context;
-       para_fd_set(sct->listen_fd, &s->rfds, &s->max_fileno);
+
+       for (n = 0; n < sct->num_listen_fds; n++)
+               para_fd_set(sct->listen_fds[n], &s->rfds, &s->max_fileno);
 }
 
-static int command_post_select(struct sched *s, void *context)
+static int command_task_accept(unsigned listen_idx, fd_set *rfds,
+               struct server_command_task *sct)
 {
-       struct server_command_task *sct = context;
-
        int new_fd, ret, i;
        char *peer_name;
        pid_t child_pid;
        uint32_t *chunk_table;
 
-       ret = para_accept(sct->listen_fd, &s->rfds, NULL, 0, &new_fd);
+       ret = para_accept(sct->listen_fds[listen_idx], rfds, NULL, 0, &new_fd);
        if (ret <= 0)
                goto out;
        mmd->num_connects++;
@@ -411,23 +413,61 @@ out:
        return 0;
 }
 
+static int command_post_select(struct sched *s, void *context)
+{
+       struct server_command_task *sct = context;
+       unsigned n;
+       int ret;
+
+       for (n = 0; n < sct->num_listen_fds; n++) {
+               ret = command_task_accept(n, &s->rfds, sct);
+               if (ret < 0) {
+                       free(sct->listen_fds);
+                       return ret;
+               }
+       }
+       return 0;
+}
+
 static void init_server_command_task(int argc, char **argv)
 {
        int ret;
        static struct server_command_task server_command_task_struct,
                *sct = &server_command_task_struct;
+       unsigned n;
+       uint32_t port = OPT_UINT32_VAL(PORT);
+
 
        PARA_NOTICE_LOG("initializing tcp command socket\n");
        sct->argc = argc;
        sct->argv = argv;
-       ret = para_listen_simple(IPPROTO_TCP, OPT_UINT32_VAL(PORT));
-       if (ret < 0)
-               goto err;
-       sct->listen_fd = ret;
-       ret = mark_fd_nonblocking(sct->listen_fd);
-       if (ret < 0)
-               goto err;
-       add_close_on_fork_list(sct->listen_fd); /* child doesn't need the listener */
+       if (!OPT_GIVEN(LISTEN_ADDRESS)) {
+               sct->num_listen_fds = 1;
+               sct->listen_fds = para_malloc(sizeof(int));
+               ret = para_listen_simple(IPPROTO_TCP, port);
+               if (ret < 0)
+                       goto err;
+               sct->listen_fds[0] = ret;
+       } else {
+               sct->num_listen_fds = OPT_GIVEN(LISTEN_ADDRESS);
+               sct->listen_fds = para_malloc(sct->num_listen_fds * sizeof(int));
+               for (n = 0; n < OPT_GIVEN(LISTEN_ADDRESS); n++) {
+                       const char *arg;
+                       arg = lls_string_val(n, OPT_RESULT(LISTEN_ADDRESS));
+                       ret = para_listen(IPPROTO_TCP, arg, port);
+                       if (ret < 0)
+                               goto err;
+                       sct->listen_fds[n] = ret;
+               }
+       }
+       for (n = 0; n < sct->num_listen_fds; n++) {
+               ret = mark_fd_nonblocking(sct->listen_fds[n]);
+               if (ret < 0)
+                       goto err;
+               /* child doesn't need the listener */
+               add_close_on_fork_list(sct->listen_fds[n]);
+       }
+
        sct->task = task_register(&(struct task_info) {
                .name = "server command",
                .pre_select = command_pre_select,