contrib/fwd/src/fwd_ipc.c

   1 /*
   2  * fwd - OpenWrt firewall daemon - unix domain socket parts
   3  *
   4  *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  * The fwd program is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * The fwd program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with the fwd program. If not, see http://www.gnu.org/licenses/.
  17  */
  18
  19
  20 #include "fwd.h"
  21 #include "fwd_ipc.h"
  22
  23
  24 int fwd_ipc_listen(void)
  25 {
  26         int fd;
  27         struct sockaddr_un addr;
  28
  29         if( (fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0 )
  30                 fwd_fatal("Cannot create AF_UNIX socket: %m");
  31
  32         memset(&addr, 0, sizeof(struct sockaddr_un));
  33         strcpy(addr.sun_path, FWD_SOCKET_PATH);
  34         addr.sun_family = AF_UNIX;
  35
  36         unlink(FWD_SOCKET_PATH);
  37
  38         if( bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0 )
  39                 fwd_fatal("Cannot bind AF_UNIX socket: %m");
  40
  41         if( listen(fd, 1) < 0 )
  42                 fwd_fatal("Cannot listen on AF_UNIX socket: %m");
  43
  44         //fcntl(fd, F_SETFL, O_NONBLOCK);
  45
  46         return fd;
  47 }
  48
  49 int fwd_ipc_accept(int fd)
  50 {
  51         return accept(fd, NULL, NULL);
  52 }
  53
  54 int fwd_ipc_connect(void)
  55 {
  56         int fd;
  57         struct sockaddr_un addr;
  58
  59         if( (fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0 )
  60                 fwd_fatal("Cannot create AF_UNIX socket: %m");
  61
  62         memset(&addr, 0, sizeof(struct sockaddr_un));
  63         strcpy(addr.sun_path, FWD_SOCKET_PATH);
  64         addr.sun_family = AF_UNIX;
  65
  66         if( connect(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0 )
  67                 fwd_fatal("Cannot connect AF_UNIX socket: %m");
  68
  69         fcntl(fd, F_SETFL, O_NONBLOCK);
  70
  71         return fd;
  72 }
  73
  74 int fwd_ipc_recvmsg(int fd, void *buf, int len)
  75 {
  76         return recv(fd, buf, len, 0);
  77 }
  78
  79 int fwd_ipc_sendmsg(int fd, void *buf, int len)
  80 {
  81         return send(fd, buf, len, 0);
  82 }
  83
  84 void fwd_ipc_shutdown(int fd)
  85 {
  86         shutdown(fd, SHUT_RDWR);
  87         close(fd);
  88 }
  89
  90 int fwd_ipc_sendtype(int fd, enum fwd_ipc_msgtype type)
  91 {
  92         struct fwd_ipc_msg msg;
  93
  94         memset(&msg, 0, sizeof(struct fwd_ipc_msg));
  95         msg.type = type;
  96
  97         return fwd_ipc_sendmsg(fd, &msg, sizeof(struct fwd_ipc_msg));
  98 }