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eb01ac3fc8
curl-curl/lib/dict.c
Daniel Stenberg 255aac56f9
curlx: move into to curlx/ 
Move curlx_ functions into its own subdir.

The idea is to use the curlx_ prefix proper on these functions, and use
these same function names both in tool, lib and test suite source code.
Stop the previous special #define setup for curlx_ names.

The printf defines are now done for the library alone. Tests no longer
use the printf defines. The tool code sets its own defines. The printf
functions are not curlx, they are publicly available.

The strcase defines are not curlx_ functions and should not be used by
tool or server code.

dynbuf, warnless, base64, strparse, timeval, timediff are now proper
curlx functions.

When libcurl is built statically, the functions from the library can be
used as-is. The key is then that the functions must work as-is, without
having to be recompiled for use in tool/tests. This avoids symbol
collisions - when libcurl is built statically, we use those functions
directly when building the tool/tests. When libcurl is shared, we
build/link them separately for the tool/tests.

Assisted-by: Jay Satiro

Closes #17253
2025-05-07 11:01:15 +02:00

319 lines
8.7 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#ifndef CURL_DISABLE_DICT
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#elif defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include "urldata.h"
#include <curl/curl.h>
#include "transfer.h"
#include "sendf.h"
#include "escape.h"
#include "progress.h"
#include "dict.h"
#include "curl_printf.h"
#include "strcase.h"
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
#define DICT_MATCH "/MATCH:"
#define DICT_MATCH2 "/M:"
#define DICT_MATCH3 "/FIND:"
#define DICT_DEFINE "/DEFINE:"
#define DICT_DEFINE2 "/D:"
#define DICT_DEFINE3 "/LOOKUP:"
/*
* Forward declarations.
*/
static CURLcode dict_do(struct Curl_easy *data, bool *done);
/*
* DICT protocol handler.
*/
const struct Curl_handler Curl_handler_dict = {
"dict", /* scheme */
ZERO_NULL, /* setup_connection */
dict_do, /* do_it */
ZERO_NULL, /* done */
ZERO_NULL, /* do_more */
ZERO_NULL, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
ZERO_NULL, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
ZERO_NULL, /* write_resp */
ZERO_NULL, /* write_resp_hd */
ZERO_NULL, /* connection_check */
ZERO_NULL, /* attach connection */
ZERO_NULL, /* follow */
PORT_DICT, /* defport */
CURLPROTO_DICT, /* protocol */
CURLPROTO_DICT, /* family */
PROTOPT_NONE | PROTOPT_NOURLQUERY /* flags */
};
#define DYN_DICT_WORD 10000
static char *unescape_word(const char *input)
{
struct dynbuf out;
const char *ptr;
CURLcode result = CURLE_OK;
curlx_dyn_init(&out, DYN_DICT_WORD);
/* According to RFC2229 section 2.2, these letters need to be escaped with
\[letter] */
for(ptr = input; *ptr; ptr++) {
char ch = *ptr;
if((ch <= 32) || (ch == 127) ||
(ch == '\'') || (ch == '\"') || (ch == '\\'))
result = curlx_dyn_addn(&out, "\\", 1);
if(!result)
result = curlx_dyn_addn(&out, ptr, 1);
if(result)
return NULL;
}
return curlx_dyn_ptr(&out);
}
/* sendf() sends formatted data to the server */
static CURLcode sendf(struct Curl_easy *data,
const char *fmt, ...) CURL_PRINTF(2, 3);
static CURLcode sendf(struct Curl_easy *data, const char *fmt, ...)
{
size_t bytes_written;
size_t write_len;
CURLcode result = CURLE_OK;
char *s;
char *sptr;
va_list ap;
va_start(ap, fmt);
s = vaprintf(fmt, ap); /* returns an allocated string */
va_end(ap);
if(!s)
return CURLE_OUT_OF_MEMORY; /* failure */
bytes_written = 0;
write_len = strlen(s);
sptr = s;
for(;;) {
/* Write the buffer to the socket */
result = Curl_xfer_send(data, sptr, write_len, FALSE, &bytes_written);
if(result)
break;
Curl_debug(data, CURLINFO_DATA_OUT, sptr, (size_t)bytes_written);
if((size_t)bytes_written != write_len) {
/* if not all was written at once, we must advance the pointer, decrease
the size left and try again! */
write_len -= bytes_written;
sptr += bytes_written;
}
else
break;
}
free(s); /* free the output string */
return result;
}
static CURLcode dict_do(struct Curl_easy *data, bool *done)
{
char *word;
char *eword = NULL;
char *ppath;
char *database = NULL;
char *strategy = NULL;
char *nthdef = NULL; /* This is not part of the protocol, but required
by RFC 2229 */
CURLcode result;
char *path;
*done = TRUE; /* unconditionally */
/* url-decode path before further evaluation */
result = Curl_urldecode(data->state.up.path, 0, &path, NULL, REJECT_CTRL);
if(result)
return result;
if(strncasecompare(path, DICT_MATCH, sizeof(DICT_MATCH)-1) ||
strncasecompare(path, DICT_MATCH2, sizeof(DICT_MATCH2)-1) ||
strncasecompare(path, DICT_MATCH3, sizeof(DICT_MATCH3)-1)) {
word = strchr(path, ':');
if(word) {
word++;
database = strchr(word, ':');
if(database) {
*database++ = (char)0;
strategy = strchr(database, ':');
if(strategy) {
*strategy++ = (char)0;
nthdef = strchr(strategy, ':');
if(nthdef) {
*nthdef = (char)0;
}
}
}
}
if(!word || (*word == (char)0)) {
infof(data, "lookup word is missing");
}
eword = unescape_word((!word || (*word == (char)0)) ? "default" : word);
if(!eword) {
result = CURLE_OUT_OF_MEMORY;
goto error;
}
result = sendf(data,
"CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
"MATCH "
"%s " /* database */
"%s " /* strategy */
"%s\r\n" /* word */
"QUIT\r\n",
(!database || (*database == (char)0)) ? "!" : database,
(!strategy || (*strategy == (char)0)) ? "." : strategy,
eword);
if(result) {
failf(data, "Failed sending DICT request");
goto error;
}
Curl_xfer_setup1(data, CURL_XFER_RECV, -1, FALSE); /* no upload */
}
else if(strncasecompare(path, DICT_DEFINE, sizeof(DICT_DEFINE)-1) ||
strncasecompare(path, DICT_DEFINE2, sizeof(DICT_DEFINE2)-1) ||
strncasecompare(path, DICT_DEFINE3, sizeof(DICT_DEFINE3)-1)) {
word = strchr(path, ':');
if(word) {
word++;
database = strchr(word, ':');
if(database) {
*database++ = (char)0;
nthdef = strchr(database, ':');
if(nthdef) {
*nthdef = (char)0;
}
}
}
if(!word || (*word == (char)0)) {
infof(data, "lookup word is missing");
}
eword = unescape_word((!word || (*word == (char)0)) ? "default" : word);
if(!eword) {
result = CURLE_OUT_OF_MEMORY;
goto error;
}
result = sendf(data,
"CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
"DEFINE "
"%s " /* database */
"%s\r\n" /* word */
"QUIT\r\n",
(!database || (*database == (char)0)) ? "!" : database,
eword);
if(result) {
failf(data, "Failed sending DICT request");
goto error;
}
Curl_xfer_setup1(data, CURL_XFER_RECV, -1, FALSE);
}
else {
ppath = strchr(path, '/');
if(ppath) {
int i;
ppath++;
for(i = 0; ppath[i]; i++) {
if(ppath[i] == ':')
ppath[i] = ' ';
}
result = sendf(data,
"CLIENT " LIBCURL_NAME " " LIBCURL_VERSION "\r\n"
"%s\r\n"
"QUIT\r\n", ppath);
if(result) {
failf(data, "Failed sending DICT request");
goto error;
}
Curl_xfer_setup1(data, CURL_XFER_RECV, -1, FALSE);
}
}
error:
free(eword);
free(path);
return result;
}
#endif /* CURL_DISABLE_DICT */
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