diff options
Diffstat (limited to 'test/testserver.c')
| -rw-r--r-- | test/testserver.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/test/testserver.c b/test/testserver.c new file mode 100644 index 0000000..00e0ac4 --- /dev/null +++ b/test/testserver.c @@ -0,0 +1,197 @@ +/* + * tcpproxy + * + * tcpproxy is a simple tcp connection proxy which combines the + * features of rinetd and 6tunnel. tcpproxy supports IPv4 and + * IPv6 and also supports connections from IPv6 to IPv4 + * endpoints and vice versa. + * + * + * Copyright (C) 2010-2015 Christian Pointner <equinox@spreadspace.org> + * + * This file is part of tcpproxy. + * + * tcpproxy is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * any later version. + * + * tcpproxy is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with tcpproxy. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <stdio.h> +#include <string.h> +#include <ctype.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <unistd.h> + +int main(int argc, char* argv[]) +{ + if(argc < 3) { + fprintf(stderr, "Usage: %s <port> (A|B)\n", argv[0]); + return -1; + } + + int s = socket(AF_INET, SOCK_STREAM, 0); + if(!s) { + perror("socket()"); + return -1; + } + + int on = 1; + int ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); + if(ret) { + perror("setsockopt(SO_REUSEADDR)"); + return -1; + } + + struct sockaddr_in laddr; + laddr.sin_family = AF_INET; + laddr.sin_port = htons(atoi(argv[1])); + laddr.sin_addr.s_addr = htonl(INADDR_ANY); + ret = bind(s, (struct sockaddr*)(&laddr), sizeof(struct sockaddr_in)); + if(ret) { + perror("bind()"); + return -1; + } + + ret = listen(s, 1); + if(ret) { + perror("listen()"); + return -1; + } + + printf("MODE: %c, listening...\n", toupper(argv[2][0])); + + struct sockaddr_in caddr; + socklen_t len = sizeof(struct sockaddr_in); + int c = accept(s, (struct sockaddr*)(&caddr), &len); + if(c < 0) { + perror("accept()"); + return -1; + } + char addr_str[64]; + if(!inet_ntop(AF_INET, (&caddr.sin_addr), addr_str, sizeof(addr_str))) { + perror("inet_ntop"); + return -1; + } + printf("connection from %s:%d\n", addr_str, caddr.sin_port); + + + switch(toupper(argv[2][0])) { +/*************** MODE A ***************/ + case 'A': { + char buf[10000]; + int rtot = 0; + for(;;) { + int nbread = recv(c, buf, sizeof(buf), 0); + if(nbread <= 0) { + if(!nbread) { + fprintf(stderr, "connection closed\n"); + sleep(1); + return 0; + } else if (errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR) { + perror("recv()"); + return -1; + } + continue; + } + + rtot += nbread; + printf("%d bytes received, total = %d\n", nbread, rtot); + + int len = 0; + for(;;) { + int nbwritten = send(c, &(buf[len]), nbread - len, 0); + if(nbwritten <= 0) { + if(nbwritten < 0 && (errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR)) { + perror("send()"); + return -1; + } + continue; + } + printf("%d bytes sent\n", nbwritten); + len += nbwritten; + if(len >= nbread) { + break; + } + } + } + break; + } +/*************** MODE A ***************/ + case 'B': { + char buf[1234567]; + int rtot = 0; + for(;;) { + int nbread = recv(c, &(buf[rtot]), sizeof(buf) - rtot, 0); + if(nbread <= 0) { + if(!nbread) { + fprintf(stderr, "connection closed\n"); + return 0; + } else if (errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR) { + perror("recv()"); + return -1; + } + continue; + } + + rtot += nbread; + printf("%d bytes received, total = %d\n", nbread, rtot); + unsigned char* end = memchr(buf, '\n', rtot); + if(!end) { + if(rtot >= sizeof(buf)) { + printf("Request too big...\n"); + return -2; + } + } else { + *end = 0; + printf("Got Request: '%s'\n", buf); + break; + } + } + + unsigned int i; + for(i = 0; i<sizeof(buf); ++i) { + buf[i] = 'A' + i%62; + } + buf[sizeof(buf)-1] = '\n'; + + int wtot = 0; + for(;;) { + int nbwritten = send(c, &(buf[wtot]), sizeof(buf) - wtot, 0); + if(nbwritten <= 0) { + if(nbwritten < 0) + perror("send()"); + else + fprintf(stderr, "nothing sent... aborting\n"); + return -1; + } + wtot += nbwritten; + printf("%d bytes sent, total=%d\n", nbwritten, wtot); + if(wtot >= sizeof(buf)) { + break; + } + } + shutdown(c, SHUT_WR); + while(recv(c, buf, 1, 0) > 0); + + break; + } +/**************************************/ + } + + return 0; +} |