| /* |
| * Dropbear SSH |
| * |
| * Copyright (c) 2002,2003 Matt Johnston |
| * All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. */ |
| |
| #include "includes.h" |
| #include "ssh.h" |
| #include "tcpfwd.h" |
| #include "dbutil.h" |
| #include "session.h" |
| #include "buffer.h" |
| #include "packet.h" |
| #include "listener.h" |
| #include "runopts.h" |
| |
| #ifdef DROPBEAR_TCP_ACCEPT |
| |
| static void cleanup_tcp(struct Listener *listener) { |
| |
| struct TCPListener *tcpinfo = (struct TCPListener*)(listener->typedata); |
| |
| m_free(tcpinfo->sendaddr); |
| m_free(tcpinfo); |
| } |
| |
| static void tcp_acceptor(struct Listener *listener, int sock) { |
| |
| int fd; |
| struct sockaddr_storage addr; |
| int len; |
| char ipstring[NI_MAXHOST], portstring[NI_MAXSERV]; |
| struct TCPListener *tcpinfo = (struct TCPListener*)(listener->typedata); |
| |
| len = sizeof(addr); |
| |
| fd = accept(sock, (struct sockaddr*)&addr, &len); |
| if (fd < 0) { |
| return; |
| } |
| |
| if (getnameinfo((struct sockaddr*)&addr, len, ipstring, sizeof(ipstring), |
| portstring, sizeof(portstring), |
| NI_NUMERICHOST | NI_NUMERICSERV) != 0) { |
| return; |
| } |
| |
| if (send_msg_channel_open_init(fd, tcpinfo->chantype) == DROPBEAR_SUCCESS) { |
| |
| buf_putstring(ses.writepayload, tcpinfo->sendaddr, |
| strlen(tcpinfo->sendaddr)); |
| buf_putint(ses.writepayload, tcpinfo->sendport); |
| buf_putstring(ses.writepayload, ipstring, strlen(ipstring)); |
| buf_putint(ses.writepayload, atol(portstring)); |
| |
| encrypt_packet(); |
| |
| } else { |
| /* XXX debug? */ |
| close(fd); |
| } |
| } |
| |
| int listen_tcpfwd(struct TCPListener* tcpinfo) { |
| |
| char portstring[NI_MAXSERV]; |
| int socks[DROPBEAR_MAX_SOCKS]; |
| struct Listener *listener = NULL; |
| int nsocks; |
| char* errstring = NULL; |
| |
| TRACE(("enter listen_tcpfwd")); |
| |
| /* first we try to bind, so don't need to do so much cleanup on failure */ |
| snprintf(portstring, sizeof(portstring), "%d", tcpinfo->listenport); |
| |
| /* XXX Note: we're just listening on localhost, no matter what they tell |
| * us. If someone wants to make it listen otherways, then change |
| * the "" argument. but that requires UI changes too */ |
| nsocks = dropbear_listen("", portstring, socks, |
| DROPBEAR_MAX_SOCKS, &errstring, &ses.maxfd); |
| if (nsocks < 0) { |
| dropbear_log(LOG_INFO, "TCP forward failed: %s", errstring); |
| m_free(errstring); |
| TRACE(("leave listen_tcpfwd: dropbear_listen failed")); |
| return DROPBEAR_FAILURE; |
| } |
| |
| listener = new_listener(socks, nsocks, CHANNEL_ID_TCPFORWARDED, tcpinfo, |
| tcp_acceptor, cleanup_tcp); |
| |
| if (listener == NULL) { |
| m_free(tcpinfo); |
| TRACE(("leave listen_tcpfwd: listener failed")); |
| return DROPBEAR_FAILURE; |
| } |
| |
| TRACE(("leave listen_tcpfwd: success")); |
| return DROPBEAR_SUCCESS; |
| } |
| |
| #endif /* DROPBEAR_TCP_ACCEPT */ |