+++ /dev/null
-/*\r
- * tunproxy.c --- small demo program for tunneling over UDP with tun/tap\r
- *\r
- * Copyright (C) 2003 Philippe Biondi <phil@secdev.org>\r
- * Copyright (C) 2013 Felician Nemeth <nemethf@tmit.bme.hu>\r
- *\r
- * This program is free software; you can redistribute it and/or modify it\r
- * under the terms of the GNU Lesser General Public License as published by\r
- * the Free Software Foundation.\r
- *\r
- * This program is distributed in the hope that it will be useful, but\r
- * WITHOUT ANY WARRANTY; without even the implied warranty of\r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
- * Lesser General Public License for more details.\r
- *\r
- * http://www.secdev.org/projects/tuntap_udp/files/tunproxy.c\r
- */\r
-\r
-#ifdef HAVE_CONFIG_H\r
-#include <config.h>\r
-#endif\r
-#include <stdlib.h>\r
-#include <stdio.h>\r
-#include <string.h>\r
-#include <unistd.h>\r
-#include <sys/stat.h>\r
-#include <fcntl.h>\r
-#include <sys/types.h>\r
-#include <sys/socket.h>\r
-#include <netinet/in.h>\r
-#include <arpa/inet.h>\r
-#include <string.h>\r
-#include <net/if.h>\r
-#include <linux/if_tun.h>\r
-#include <getopt.h>\r
-#include <sys/ioctl.h>\r
-#include <errno.h>\r
-\r
-#define PERROR(x) do { perror(x); exit(1); } while (0)\r
-#define ERROR(x, args ...) do { fprintf(stderr,"ERROR:" x, ## args); exit(1); } while (0)\r
-\r
-extern void exit(int);\r
-\r
-void usage()\r
-{\r
- fprintf(stderr, "Usage: tunproxy -t target_ip:port [-p local_port] [-e]\n");\r
- exit(0);\r
-}\r
-\r
-int main(int argc, char *argv[])\r
-{\r
- struct sockaddr_in sin, sout, remote;\r
- struct ifreq ifr;\r
- int fd, s, remote_len, remote_port, local_port, l;\r
- unsigned int soutlen;\r
- char c, *p, *remote_ip = 0;\r
- char buf[2000];\r
- fd_set fdset;\r
-\r
- int TUNMODE = IFF_TUN, DEBUG = 0;\r
-\r
- while ((c = getopt(argc, argv, "t:p:ehd")) != -1) {\r
- switch (c) {\r
- case 'h':\r
- usage();\r
- case 'd':\r
- DEBUG++;\r
- break;\r
- case 'p':\r
- local_port = atoi(optarg);\r
- break;\r
- case 't':\r
- p = memchr(optarg,':',16);\r
- if (!p) ERROR("invalid argument : [%s]\n",optarg);\r
- *p = 0;\r
- remote_ip = optarg;\r
- remote_port = atoi(p+1);\r
- break;\r
- case 'e':\r
- TUNMODE = IFF_TAP;\r
- break;\r
- default:\r
- usage();\r
- }\r
- }\r
- if (remote_ip == 0) usage();\r
-\r
- if ( (fd = open("/dev/net/tun",O_RDWR)) < 0) PERROR("open");\r
-\r
- memset(&ifr, 0, sizeof(ifr));\r
- ifr.ifr_flags = TUNMODE | IFF_NO_PI;\r
- strncpy(ifr.ifr_name, "toto%d", IFNAMSIZ);\r
- if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) PERROR("ioctl");\r
-\r
- printf("Allocated interface %s. Configure and use it\n", ifr.ifr_name);\r
- \r
- s = socket(PF_INET, SOCK_DGRAM, 0);\r
- sin.sin_family = AF_INET;\r
- sin.sin_addr.s_addr = htonl(INADDR_ANY);\r
- sin.sin_port = htons(local_port);\r
-\r
- if ( bind(s,(struct sockaddr *)&sin, sizeof(sin)) < 0)\r
- PERROR("bind");\r
-\r
- remote_len = sizeof(remote);\r
- memset(&remote, 0, remote_len);\r
- remote.sin_family = AF_INET;\r
- remote.sin_port = htons(remote_port);\r
- remote.sin_addr.s_addr=inet_addr(remote_ip);\r
-\r
- while (1) {\r
- FD_ZERO(&fdset);\r
- FD_SET(fd, &fdset);\r
- FD_SET(s, &fdset);\r
- if (select(fd+s+1, &fdset,NULL,NULL,NULL) < 0) PERROR("select");\r
- if (FD_ISSET(fd, &fdset)) {\r
- if (DEBUG)\r
- if (write(1,">", 1) < 0) PERROR("write");\r
- l = read(fd, buf, sizeof(buf));\r
- if (l < 0) \r
- PERROR("read");\r
- if (sendto(s, buf, l, 0, (struct sockaddr *)&remote, remote_len) < 0)\r
- PERROR("sendto");\r
- }\r
- if (FD_ISSET(s, &fdset)) {\r
- if (DEBUG) \r
- if (write(1,"<", 1) < 0) PERROR("write");\r
- soutlen = sizeof(sout);\r
- l = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&sout, &soutlen);\r
- if (l == -1) {\r
- if (write(1,"(", 1) < 0) PERROR("write");\r
- fprintf(stderr, "[%s,%d]", strerror(errno), l);\r
- continue;\r
- }\r
- if ((sout.sin_addr.s_addr != remote.sin_addr.s_addr) ||\r
- (sout.sin_port != remote.sin_port)) {\r
- printf("Got packet from %s:%u instead of %s:%u\n", \r
- inet_ntoa(sout.sin_addr), ntohs(sout.sin_port),\r
- inet_ntoa(remote.sin_addr), ntohs(remote.sin_port));\r
- }\r
- if (write(fd, buf, l) < 0) PERROR("write");\r
- }\r
- }\r
-}\r
git://git.onelab.eu / sliver-openvswitch.git / blobdiff