Rewind work, and start in another direction.

[apps/pfixtools.git] / daemon.c

diff --git a/daemon.c b/daemon.c
new file mode 100644 (file)
index 0000000..ec8be65
--- /dev/null
+++ b/daemon.c
@@ -0,0 +1,89 @@
+/******************************************************************************/
+/*          postlicyd: a postfix policy daemon with a lot of features         */
+/*          ~~~~~~~~~                                                         */
+/*  ________________________________________________________________________  */
+/*                                                                            */
+/*  Redistribution and use in source and binary forms, with or without        */
+/*  modification, are permitted provided that the following conditions        */
+/*  are met:                                                                  */
+/*                                                                            */
+/*  1. Redistributions of source code must retain the above copyright         */
+/*     notice, this list of conditions and the following disclaimer.          */
+/*  2. Redistributions in binary form must reproduce the above copyright      */
+/*     notice, this list of conditions and the following disclaimer in the    */
+/*     documentation and/or other materials provided with the distribution.   */
+/*  3. The names of its contributors may not be used to endorse or promote    */
+/*     products derived from this software without specific prior written     */
+/*     permission.                                                            */
+/*                                                                            */
+/*  THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND   */
+/*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE     */
+/*  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR        */
+/*  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS    */
+/*  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR    */
+/*  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF      */
+/*  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS  */
+/*  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN   */
+/*  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)   */
+/*  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF    */
+/*  THE POSSIBILITY OF SUCH DAMAGE.                                           */
+/******************************************************************************/
+
+/*
+ * Copyright © 2007 Pierre Habouzit
+ */
+
+#include <sys/un.h>
+
+#include "postlicyd.h"
+#include "daemon.h"
+
+int tcp_listen(const struct sockaddr *addr, socklen_t len)
+{
+    int sock;
+
+    switch (addr->sa_family) {
+      case AF_UNIX:
+        unlink(((struct sockaddr_un *)addr)->sun_path);
+        sock = socket(PF_UNIX, SOCK_STREAM, 0);
+        break;
+      case AF_INET:
+        sock = socket(PF_INET, SOCK_STREAM, 0);
+        break;
+      case AF_INET6:
+        sock = socket(PF_INET6, SOCK_STREAM, 0);
+        break;
+      default:
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (sock < 0) {
+        UNIXERR("socket");
+        return -1;
+    }
+
+    if (addr->sa_family != AF_UNIX) {
+        int v = 1;
+        if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v)) < 0) {
+            UNIXERR("setsockopt(SO_REUSEADDR)");
+            close(sock);
+            return -1;
+        }
+    }
+
+    if (bind(sock, addr, len) < 0) {
+        UNIXERR("bind");
+        close(sock);
+        return -1;
+    }
+
+    if (listen(sock, 0) < 0) {
+        UNIXERR("bind");
+        close(sock);
+        return -1;
+    }
+
+    return sock;
+}
+