1 /* 2 * Copyright (C) 2002-2006 Josh A. Beam 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21 * WHETHER IN CONTACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 /* flags */ 27 #define PRT_VERBOSE 0x1 28 #define PRT_COLOR 0x2 29 #define PRT_DAEMON 0x4 30 #define PRT_IPV6 0x8 31 #define PRT_IRC_AUTOPONG 0x10 32 #define PRT_HTTP_1_0 0x20 33 34 /* proxy types */ 35 #define PRT_DIRECT 0 36 #define PRT_DIRECT6 1 37 #define PRT_HTTP 2 38 #define PRT_SOCKS5 3 39 40 /* keep-alive types */ 41 #define PRT_KEEPALIVE_TELNET 0 42 #define PRT_KEEPALIVE_CRLF 1 43 44 #ifdef _WIN32 45 # include <winsock2.h> 46 # define SHUT_RDWR SD_BOTH 47 # define close(s) closesocket(s) 48 # define snprintf _snprintf 49 #else 50 # include <unistd.h> 51 # include <sys/time.h> 52 # include <sys/socket.h> 53 # include <netinet/in.h> 54 # include <netdb.h> 55 #endif /* _WIN32 */ 56 57 struct prt_context { 58 /* pointers to protocol-specific functions */ 59 int (*connect)(struct prt_context *context, char *hostname, unsigned short port, char *username, char *password, int server_timeout); 60 void (*disconnect)(struct prt_context *context); 61 int (*local_read)(struct prt_context *context, char *buf, int size); 62 int (*local_send)(struct prt_context *context, char *buf, int size); 63 int (*remote_read)(struct prt_context *context, char *buf, int size); 64 int (*remote_send)(struct prt_context *context, char *buf, int size); 65 66 struct sockaddr_in sin; 67 #ifdef IPV6 68 struct sockaddr_in6 sin6; 69 #endif /* IPV6 */ 70 unsigned int sockaddr_len; 71 72 int localfd; /* client socket */ 73 int remotefd; /* server socket */ 74 unsigned int bytes_sent; 75 unsigned int bytes_rcvd; 76 void *data; /* some protocols may require extra data, so we 77 include this pointer for them to keep track of it */ 78 79 unsigned long keepalive_seconds; 80 }; 81