1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at http://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 23#include "setup.h" 24 25#ifndef CURL_DISABLE_GOPHER 26 27#ifdef HAVE_SYS_SOCKET_H 28#include <sys/socket.h> 29#endif 30#ifdef HAVE_NETINET_IN_H 31#include <netinet/in.h> 32#endif 33#ifdef HAVE_UNISTD_H 34#include <unistd.h> 35#endif 36#ifdef HAVE_NETDB_H 37#include <netdb.h> 38#endif 39#ifdef HAVE_ARPA_INET_H 40#include <arpa/inet.h> 41#endif 42#ifdef HAVE_NET_IF_H 43#include <net/if.h> 44#endif 45#ifdef HAVE_SYS_IOCTL_H 46#include <sys/ioctl.h> 47#endif 48 49#ifdef HAVE_SYS_PARAM_H 50#include <sys/param.h> 51#endif 52 53#ifdef HAVE_SYS_SELECT_H 54#include <sys/select.h> 55#endif 56 57#include "urldata.h" 58#include <curl/curl.h> 59#include "transfer.h" 60#include "sendf.h" 61 62#include "progress.h" 63#include "strequal.h" 64#include "gopher.h" 65#include "rawstr.h" 66#include "select.h" 67#include "url.h" 68#include "warnless.h" 69 70#define _MPRINTF_REPLACE /* use our functions only */ 71#include <curl/mprintf.h> 72 73/* The last #include file should be: */ 74#include "memdebug.h" 75 76 77/* 78 * Forward declarations. 79 */ 80 81static CURLcode gopher_do(struct connectdata *conn, bool *done); 82 83/* 84 * Gopher protocol handler. 85 * This is also a nice simple template to build off for simple 86 * connect-command-download protocols. 87 */ 88 89const struct Curl_handler Curl_handler_gopher = { 90 "GOPHER", /* scheme */ 91 ZERO_NULL, /* setup_connection */ 92 gopher_do, /* do_it */ 93 ZERO_NULL, /* done */ 94 ZERO_NULL, /* do_more */ 95 ZERO_NULL, /* connect_it */ 96 ZERO_NULL, /* connecting */ 97 ZERO_NULL, /* doing */ 98 ZERO_NULL, /* proto_getsock */ 99 ZERO_NULL, /* doing_getsock */ 100 ZERO_NULL, /* domore_getsock */ 101 ZERO_NULL, /* perform_getsock */ 102 ZERO_NULL, /* disconnect */ 103 ZERO_NULL, /* readwrite */ 104 PORT_GOPHER, /* defport */ 105 CURLPROTO_GOPHER, /* protocol */ 106 PROTOPT_NONE /* flags */ 107}; 108 109static CURLcode gopher_do(struct connectdata *conn, bool *done) 110{ 111 CURLcode result=CURLE_OK; 112 struct SessionHandle *data=conn->data; 113 curl_socket_t sockfd = conn->sock[FIRSTSOCKET]; 114 115 curl_off_t *bytecount = &data->req.bytecount; 116 char *path = data->state.path; 117 char *sel; 118 char *sel_org = NULL; 119 ssize_t amount, k; 120 121 *done = TRUE; /* unconditionally */ 122 123 /* Create selector. Degenerate cases: / and /1 => convert to "" */ 124 if(strlen(path) <= 2) 125 sel = (char *)""; 126 else { 127 char *newp; 128 size_t j, i; 129 int len; 130 131 /* Otherwise, drop / and the first character (i.e., item type) ... */ 132 newp = path; 133 newp+=2; 134 135 /* ... then turn ? into TAB for search servers, Veronica, etc. ... */ 136 j = strlen(newp); 137 for(i=0; i<j; i++) 138 if(newp[i] == '?') 139 newp[i] = '\x09'; 140 141 /* ... and finally unescape */ 142 sel = curl_easy_unescape(data, newp, 0, &len); 143 if(!sel) 144 return CURLE_OUT_OF_MEMORY; 145 sel_org = sel; 146 } 147 148 /* We use Curl_write instead of Curl_sendf to make sure the entire buffer is 149 sent, which could be sizeable with long selectors. */ 150 k = curlx_uztosz(strlen(sel)); 151 152 for(;;) { 153 result = Curl_write(conn, sockfd, sel, k, &amount); 154 if(CURLE_OK == result) { /* Which may not have written it all! */ 155 result = Curl_client_write(conn, CLIENTWRITE_HEADER, sel, amount); 156 if(result) { 157 Curl_safefree(sel_org); 158 return result; 159 } 160 k -= amount; 161 sel += amount; 162 if(k < 1) 163 break; /* but it did write it all */ 164 } 165 else { 166 failf(data, "Failed sending Gopher request"); 167 Curl_safefree(sel_org); 168 return result; 169 } 170 /* Don't busyloop. The entire loop thing is a work-around as it causes a 171 BLOCKING behavior which is a NO-NO. This function should rather be 172 split up in a do and a doing piece where the pieces that aren't 173 possible to send now will be sent in the doing function repeatedly 174 until the entire request is sent. 175 176 Wait a while for the socket to be writable. Note that this doesn't 177 acknowledge the timeout. 178 */ 179 Curl_socket_ready(CURL_SOCKET_BAD, sockfd, 100); 180 } 181 182 Curl_safefree(sel_org); 183 184 /* We can use Curl_sendf to send the terminal \r\n relatively safely and 185 save allocing another string/doing another _write loop. */ 186 result = Curl_sendf(sockfd, conn, "\r\n"); 187 if(result != CURLE_OK) { 188 failf(data, "Failed sending Gopher request"); 189 return result; 190 } 191 result = Curl_client_write(conn, CLIENTWRITE_HEADER, (char *)"\r\n", 2); 192 if(result) 193 return result; 194 195 Curl_setup_transfer(conn, FIRSTSOCKET, -1, FALSE, bytecount, 196 -1, NULL); /* no upload */ 197 return CURLE_OK; 198} 199#endif /*CURL_DISABLE_GOPHER*/ 200