321 lines
8.5 KiB
C
321 lines
8.5 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifndef CURL_DISABLE_DICT
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_NET_IF_H
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#include <net/if.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#elif defined(HAVE_UNISTD_H)
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#include <unistd.h>
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#endif
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#include "urldata.h"
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#include <curl/curl.h>
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#include "transfer.h"
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#include "sendf.h"
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#include "escape.h"
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#include "progress.h"
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#include "dict.h"
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#include "curl_printf.h"
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#include "strcase.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/*
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* Forward declarations.
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*/
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static CURLcode dict_do(struct Curl_easy *data, bool *done);
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/*
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* DICT protocol handler.
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*/
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const struct Curl_handler Curl_handler_dict = {
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"DICT", /* scheme */
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ZERO_NULL, /* setup_connection */
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dict_do, /* do_it */
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ZERO_NULL, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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ZERO_NULL, /* disconnect */
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ZERO_NULL, /* write_resp */
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ZERO_NULL, /* connection_check */
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ZERO_NULL, /* attach connection */
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PORT_DICT, /* defport */
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CURLPROTO_DICT, /* protocol */
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CURLPROTO_DICT, /* family */
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PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
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};
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#define DYN_DICT_WORD 10000
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static char *unescape_word(const char *input)
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{
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struct dynbuf out;
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const char *ptr;
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CURLcode result = CURLE_OK;
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Curl_dyn_init(&out, DYN_DICT_WORD);
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/* According to RFC2229 section 2.2, these letters need to be escaped with
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\[letter] */
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for(ptr = input; *ptr; ptr++) {
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char ch = *ptr;
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if((ch <= 32) || (ch == 127) ||
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(ch == '\'') || (ch == '\"') || (ch == '\\'))
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result = Curl_dyn_addn(&out, "\\", 1);
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if(!result)
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result = Curl_dyn_addn(&out, ptr, 1);
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if(result)
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return NULL;
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}
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return Curl_dyn_ptr(&out);
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}
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/* sendf() sends formatted data to the server */
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static CURLcode sendf(struct Curl_easy *data,
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const char *fmt, ...) CURL_PRINTF(2, 3);
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static CURLcode sendf(struct Curl_easy *data, const char *fmt, ...)
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{
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size_t bytes_written;
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size_t write_len;
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CURLcode result = CURLE_OK;
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char *s;
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char *sptr;
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va_list ap;
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va_start(ap, fmt);
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s = vaprintf(fmt, ap); /* returns an allocated string */
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va_end(ap);
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if(!s)
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return CURLE_OUT_OF_MEMORY; /* failure */
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bytes_written = 0;
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write_len = strlen(s);
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sptr = s;
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for(;;) {
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/* Write the buffer to the socket */
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result = Curl_xfer_send(data, sptr, write_len, &bytes_written);
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if(result)
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break;
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Curl_debug(data, CURLINFO_DATA_OUT, sptr, (size_t)bytes_written);
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if((size_t)bytes_written != write_len) {
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/* if not all was written at once, we must advance the pointer, decrease
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the size left and try again! */
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write_len -= bytes_written;
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sptr += bytes_written;
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}
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else
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break;
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}
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free(s); /* free the output string */
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return result;
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}
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static CURLcode dict_do(struct Curl_easy *data, bool *done)
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{
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char *word;
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char *eword = NULL;
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char *ppath;
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char *database = NULL;
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char *strategy = NULL;
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char *nthdef = NULL; /* This is not part of the protocol, but required
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by RFC 2229 */
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CURLcode result;
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char *path;
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*done = TRUE; /* unconditionally */
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/* url-decode path before further evaluation */
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result = Curl_urldecode(data->state.up.path, 0, &path, NULL, REJECT_CTRL);
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if(result)
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return result;
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if(strncasecompare(path, DICT_MATCH, sizeof(DICT_MATCH)-1) ||
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strncasecompare(path, DICT_MATCH2, sizeof(DICT_MATCH2)-1) ||
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strncasecompare(path, DICT_MATCH3, sizeof(DICT_MATCH3)-1)) {
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word = strchr(path, ':');
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if(word) {
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word++;
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database = strchr(word, ':');
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if(database) {
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*database++ = (char)0;
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strategy = strchr(database, ':');
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if(strategy) {
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*strategy++ = (char)0;
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nthdef = strchr(strategy, ':');
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if(nthdef) {
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*nthdef = (char)0;
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}
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}
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}
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}
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if(!word || (*word == (char)0)) {
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infof(data, "lookup word is missing");
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word = (char *)"default";
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}
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if(!database || (*database == (char)0)) {
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database = (char *)"!";
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}
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if(!strategy || (*strategy == (char)0)) {
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strategy = (char *)".";
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}
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eword = unescape_word(word);
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if(!eword) {
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result = CURLE_OUT_OF_MEMORY;
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goto error;
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}
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result = sendf(data,
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"CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
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"MATCH "
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"%s " /* database */
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"%s " /* strategy */
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"%s\r\n" /* word */
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"QUIT\r\n",
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database,
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strategy,
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eword);
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if(result) {
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failf(data, "Failed sending DICT request");
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goto error;
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}
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Curl_xfer_setup(data, FIRSTSOCKET, -1, FALSE, -1); /* no upload */
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}
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else if(strncasecompare(path, DICT_DEFINE, sizeof(DICT_DEFINE)-1) ||
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strncasecompare(path, DICT_DEFINE2, sizeof(DICT_DEFINE2)-1) ||
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strncasecompare(path, DICT_DEFINE3, sizeof(DICT_DEFINE3)-1)) {
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word = strchr(path, ':');
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if(word) {
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word++;
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database = strchr(word, ':');
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if(database) {
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*database++ = (char)0;
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nthdef = strchr(database, ':');
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if(nthdef) {
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*nthdef = (char)0;
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}
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}
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}
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if(!word || (*word == (char)0)) {
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infof(data, "lookup word is missing");
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word = (char *)"default";
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}
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if(!database || (*database == (char)0)) {
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database = (char *)"!";
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}
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eword = unescape_word(word);
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if(!eword) {
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result = CURLE_OUT_OF_MEMORY;
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goto error;
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}
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result = sendf(data,
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"CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
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"DEFINE "
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"%s " /* database */
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"%s\r\n" /* word */
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"QUIT\r\n",
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database,
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eword);
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if(result) {
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failf(data, "Failed sending DICT request");
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goto error;
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}
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Curl_xfer_setup(data, FIRSTSOCKET, -1, FALSE, -1);
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}
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else {
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ppath = strchr(path, '/');
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if(ppath) {
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int i;
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ppath++;
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for(i = 0; ppath[i]; i++) {
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if(ppath[i] == ':')
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ppath[i] = ' ';
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}
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result = sendf(data,
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"CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
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"%s\r\n"
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"QUIT\r\n", ppath);
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if(result) {
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failf(data, "Failed sending DICT request");
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goto error;
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}
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Curl_xfer_setup(data, FIRSTSOCKET, -1, FALSE, -1);
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}
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}
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error:
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free(eword);
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free(path);
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return result;
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}
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#endif /* CURL_DISABLE_DICT */
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