1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, 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 https://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 "curl_setup.h"
24
25#ifndef CURL_DISABLE_DICT
26
27#ifdef HAVE_NETINET_IN_H
28#include <netinet/in.h>
29#endif
30#ifdef HAVE_NETDB_H
31#include <netdb.h>
32#endif
33#ifdef HAVE_ARPA_INET_H
34#include <arpa/inet.h>
35#endif
36#ifdef HAVE_NET_IF_H
37#include <net/if.h>
38#endif
39#ifdef HAVE_SYS_IOCTL_H
40#include <sys/ioctl.h>
41#endif
42
43#ifdef HAVE_SYS_PARAM_H
44#include <sys/param.h>
45#endif
46
47#ifdef HAVE_SYS_SELECT_H
48#include <sys/select.h>
49#endif
50
51#include "urldata.h"
52#include <curl/curl.h>
53#include "transfer.h"
54#include "sendf.h"
55#include "escape.h"
56#include "progress.h"
57#include "dict.h"
58#include "strcase.h"
59#include "curl_memory.h"
60/* The last #include file should be: */
61#include "memdebug.h"
62
63/*
64 * Forward declarations.
65 */
66
67static CURLcode dict_do(struct connectdata *conn, bool *done);
68
69/*
70 * DICT protocol handler.
71 */
72
73const struct Curl_handler Curl_handler_dict = {
74 "DICT", /* scheme */
75 ZERO_NULL, /* setup_connection */
76 dict_do, /* do_it */
77 ZERO_NULL, /* done */
78 ZERO_NULL, /* do_more */
79 ZERO_NULL, /* connect_it */
80 ZERO_NULL, /* connecting */
81 ZERO_NULL, /* doing */
82 ZERO_NULL, /* proto_getsock */
83 ZERO_NULL, /* doing_getsock */
84 ZERO_NULL, /* domore_getsock */
85 ZERO_NULL, /* perform_getsock */
86 ZERO_NULL, /* disconnect */
87 ZERO_NULL, /* readwrite */
88 ZERO_NULL, /* connection_check */
89 PORT_DICT, /* defport */
90 CURLPROTO_DICT, /* protocol */
91 PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
92};
93
94static char *unescape_word(struct Curl_easy *data, const char *inputbuff)
95{
96 char *newp = NULL;
97 char *dictp;
98 size_t len;
99
100 CURLcode result = Curl_urldecode(data, inputbuff, 0, &newp, &len, FALSE);
101 if(!newp || result)
102 return NULL;
103
104 dictp = malloc(len*2 + 1); /* add one for terminating zero */
105 if(dictp) {
106 char *ptr;
107 char ch;
108 int olen = 0;
109 /* According to RFC2229 section 2.2, these letters need to be escaped with
110 \[letter] */
111 for(ptr = newp;
112 (ch = *ptr) != 0;
113 ptr++) {
114 if((ch <= 32) || (ch == 127) ||
115 (ch == '\'') || (ch == '\"') || (ch == '\\')) {
116 dictp[olen++] = '\\';
117 }
118 dictp[olen++] = ch;
119 }
120 dictp[olen] = 0;
121 }
122 free(newp);
123 return dictp;
124}
125
126static CURLcode dict_do(struct connectdata *conn, bool *done)
127{
128 char *word;
129 char *eword;
130 char *ppath;
131 char *database = NULL;
132 char *strategy = NULL;
133 char *nthdef = NULL; /* This is not part of the protocol, but required
134 by RFC 2229 */
135 CURLcode result = CURLE_OK;
136 struct Curl_easy *data = conn->data;
137 curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
138
139 char *path = data->state.up.path;
140
141 *done = TRUE; /* unconditionally */
142
143 if(conn->bits.user_passwd) {
144 /* AUTH is missing */
145 }
146
147 if(strncasecompare(path, DICT_MATCH, sizeof(DICT_MATCH)-1) ||
148 strncasecompare(path, DICT_MATCH2, sizeof(DICT_MATCH2)-1) ||
149 strncasecompare(path, DICT_MATCH3, sizeof(DICT_MATCH3)-1)) {
150
151 word = strchr(path, ':');
152 if(word) {
153 word++;
154 database = strchr(word, ':');
155 if(database) {
156 *database++ = (char)0;
157 strategy = strchr(database, ':');
158 if(strategy) {
159 *strategy++ = (char)0;
160 nthdef = strchr(strategy, ':');
161 if(nthdef) {
162 *nthdef = (char)0;
163 }
164 }
165 }
166 }
167
168 if((word == NULL) || (*word == (char)0)) {
169 infof(data, "lookup word is missing\n");
170 word = (char *)"default";
171 }
172 if((database == NULL) || (*database == (char)0)) {
173 database = (char *)"!";
174 }
175 if((strategy == NULL) || (*strategy == (char)0)) {
176 strategy = (char *)".";
177 }
178
179 eword = unescape_word(data, word);
180 if(!eword)
181 return CURLE_OUT_OF_MEMORY;
182
183 result = Curl_sendf(sockfd, conn,
184 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
185 "MATCH "
186 "%s " /* database */
187 "%s " /* strategy */
188 "%s\r\n" /* word */
189 "QUIT\r\n",
190
191 database,
192 strategy,
193 eword
194 );
195
196 free(eword);
197
198 if(result) {
199 failf(data, "Failed sending DICT request");
200 return result;
201 }
202 Curl_setup_transfer(data, FIRSTSOCKET, -1, FALSE, -1); /* no upload */
203 }
204 else if(strncasecompare(path, DICT_DEFINE, sizeof(DICT_DEFINE)-1) ||
205 strncasecompare(path, DICT_DEFINE2, sizeof(DICT_DEFINE2)-1) ||
206 strncasecompare(path, DICT_DEFINE3, sizeof(DICT_DEFINE3)-1)) {
207
208 word = strchr(path, ':');
209 if(word) {
210 word++;
211 database = strchr(word, ':');
212 if(database) {
213 *database++ = (char)0;
214 nthdef = strchr(database, ':');
215 if(nthdef) {
216 *nthdef = (char)0;
217 }
218 }
219 }
220
221 if((word == NULL) || (*word == (char)0)) {
222 infof(data, "lookup word is missing\n");
223 word = (char *)"default";
224 }
225 if((database == NULL) || (*database == (char)0)) {
226 database = (char *)"!";
227 }
228
229 eword = unescape_word(data, word);
230 if(!eword)
231 return CURLE_OUT_OF_MEMORY;
232
233 result = Curl_sendf(sockfd, conn,
234 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
235 "DEFINE "
236 "%s " /* database */
237 "%s\r\n" /* word */
238 "QUIT\r\n",
239 database,
240 eword);
241
242 free(eword);
243
244 if(result) {
245 failf(data, "Failed sending DICT request");
246 return result;
247 }
248 Curl_setup_transfer(data, FIRSTSOCKET, -1, FALSE, -1);
249 }
250 else {
251
252 ppath = strchr(path, '/');
253 if(ppath) {
254 int i;
255
256 ppath++;
257 for(i = 0; ppath[i]; i++) {
258 if(ppath[i] == ':')
259 ppath[i] = ' ';
260 }
261 result = Curl_sendf(sockfd, conn,
262 "CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
263 "%s\r\n"
264 "QUIT\r\n", ppath);
265 if(result) {
266 failf(data, "Failed sending DICT request");
267 return result;
268 }
269
270 Curl_setup_transfer(data, FIRSTSOCKET, -1, FALSE, -1);
271 }
272 }
273
274 return CURLE_OK;
275}
276#endif /*CURL_DISABLE_DICT*/
277