src/libcharon/plugins/duplicheck/duplicheck.c

   1 /*
   2  * Copyright (C) 2011 Martin Willi
   3  *
   4  * Copyright (C) secunet Security Networks AG
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include <sys/socket.h>
  18 #include <sys/un.h>
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <stddef.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <arpa/inet.h>
  26 #include <netinet/in.h>
  27
  28 #include "duplicheck_msg.h"
  29
  30 /**
  31  * Connect to the daemon, return FD
  32  */
  33 static int make_connection()
  34 {
  35         union {
  36                 struct sockaddr_un un;
  37                 struct sockaddr_in in;
  38                 struct sockaddr sa;
  39         } addr;
  40         int fd, len;
  41
  42         if (getenv("TCP_PORT"))
  43         {
  44                 addr.in.sin_family = AF_INET;
  45                 addr.in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
  46                 addr.in.sin_port = htons(atoi(getenv("TCP_PORT")));
  47                 len = sizeof(addr.in);
  48         }
  49         else
  50         {
  51                 addr.un.sun_family = AF_UNIX;
  52                 strcpy(addr.un.sun_path, DUPLICHECK_SOCKET);
  53
  54                 len = offsetof(struct sockaddr_un, sun_path) + strlen(addr.un.sun_path);
  55         }
  56         fd = socket(addr.sa.sa_family, SOCK_STREAM, 0);
  57         if (fd < 0)
  58         {
  59                 fprintf(stderr, "opening socket failed: %s\n", strerror(errno));
  60                 return -1;
  61         }
  62         if (connect(fd, &addr.sa, len) < 0)
  63         {
  64                 fprintf(stderr, "connecting failed: %s\n", strerror(errno));
  65                 close(fd);
  66                 return -1;
  67         }
  68         return fd;
  69 }
  70
  71 int main(int argc, char *argv[])
  72 {
  73         char buf[128];
  74         int fd, len;
  75         uint16_t msglen;
  76
  77         fd = make_connection();
  78         if (fd < 0)
  79         {
  80                 return 1;
  81         }
  82         while (1)
  83         {
  84                 len = recv(fd, &msglen, sizeof(msglen), 0);
  85                 if (len != sizeof(msglen))
  86                 {
  87                         break;
  88                 }
  89                 msglen = ntohs(msglen);
  90                 while (msglen)
  91                 {
  92                         if (sizeof(buf) > msglen)
  93                         {
  94                                 len = msglen;
  95                         }
  96                         else
  97                         {
  98                                 len = sizeof(buf);
  99                         }
 100                         len = recv(fd, &buf, len, 0);
 101                         if (len < 0)
 102                         {
 103                                 break;
 104                         }
 105                         msglen -= len;
 106                         printf("%.*s", len, buf);
 107                 }
 108                 printf("\n");
 109                 if (len < 0)
 110                 {
 111                         break;
 112                 }
 113         }
 114         fprintf(stderr, "reading from socket failed: %s\n", strerror(errno));
 115         close(fd);
 116         return 1;
 117 }