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Code Issues Releases Wiki Activity
b51e0742b9
curl/src/tool_setopt.c
Patrick Monnerat ee56fdb691 form/mime: field names are not allowed to contain zero-valued bytes. 
Also suppress length argument of curl_mime_name() (names are always
zero-terminated).
2017-09-22 01:08:29 +01:00

705 lines
19 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, 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.haxx.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.
*
***************************************************************************/
#include "tool_setup.h"
#ifndef CURL_DISABLE_LIBCURL_OPTION
#define ENABLE_CURLX_PRINTF
/* use our own printf() functions */
#include "curlx.h"
#include "tool_cfgable.h"
#include "tool_easysrc.h"
#include "tool_setopt.h"
#include "tool_convert.h"
#include "mime.h"
#include "memdebug.h" /* keep this as LAST include */
/* Lookup tables for converting setopt values back to symbols */
/* For enums, values may be in any order. */
/* For bit masks, put combinations first, then single bits, */
/* and finally any "NONE" value. */
#define NV(e) {#e, e}
#define NV1(e, v) {#e, (v)}
#define NVEND {NULL, 0} /* sentinel to mark end of list */
const NameValue setopt_nv_CURLPROXY[] = {
NV(CURLPROXY_HTTP),
NV(CURLPROXY_HTTP_1_0),
NV(CURLPROXY_HTTPS),
NV(CURLPROXY_SOCKS4),
NV(CURLPROXY_SOCKS5),
NV(CURLPROXY_SOCKS4A),
NV(CURLPROXY_SOCKS5_HOSTNAME),
NVEND,
};
const NameValue setopt_nv_CURL_SOCKS_PROXY[] = {
NV(CURLPROXY_SOCKS4),
NV(CURLPROXY_SOCKS5),
NV(CURLPROXY_SOCKS4A),
NV(CURLPROXY_SOCKS5_HOSTNAME),
NVEND,
};
const NameValueUnsigned setopt_nv_CURLAUTH[] = {
NV(CURLAUTH_ANY), /* combination */
NV(CURLAUTH_ANYSAFE), /* combination */
NV(CURLAUTH_BASIC),
NV(CURLAUTH_DIGEST),
NV(CURLAUTH_GSSNEGOTIATE),
NV(CURLAUTH_NTLM),
NV(CURLAUTH_DIGEST_IE),
NV(CURLAUTH_NTLM_WB),
NV(CURLAUTH_ONLY),
NV(CURLAUTH_NONE),
NVEND,
};
const NameValue setopt_nv_CURL_HTTP_VERSION[] = {
NV(CURL_HTTP_VERSION_NONE),
NV(CURL_HTTP_VERSION_1_0),
NV(CURL_HTTP_VERSION_1_1),
NV(CURL_HTTP_VERSION_2_0),
NV(CURL_HTTP_VERSION_2TLS),
NVEND,
};
const NameValue setopt_nv_CURL_SSLVERSION[] = {
NV(CURL_SSLVERSION_DEFAULT),
NV(CURL_SSLVERSION_TLSv1),
NV(CURL_SSLVERSION_SSLv2),
NV(CURL_SSLVERSION_SSLv3),
NV(CURL_SSLVERSION_TLSv1_0),
NV(CURL_SSLVERSION_TLSv1_1),
NV(CURL_SSLVERSION_TLSv1_2),
NV(CURL_SSLVERSION_TLSv1_3),
NVEND,
};
const NameValue setopt_nv_CURL_TIMECOND[] = {
NV(CURL_TIMECOND_IFMODSINCE),
NV(CURL_TIMECOND_IFUNMODSINCE),
NV(CURL_TIMECOND_LASTMOD),
NV(CURL_TIMECOND_NONE),
NVEND,
};
const NameValue setopt_nv_CURLFTPSSL_CCC[] = {
NV(CURLFTPSSL_CCC_NONE),
NV(CURLFTPSSL_CCC_PASSIVE),
NV(CURLFTPSSL_CCC_ACTIVE),
NVEND,
};
const NameValue setopt_nv_CURLUSESSL[] = {
NV(CURLUSESSL_NONE),
NV(CURLUSESSL_TRY),
NV(CURLUSESSL_CONTROL),
NV(CURLUSESSL_ALL),
NVEND,
};
const NameValueUnsigned setopt_nv_CURLSSLOPT[] = {
NV(CURLSSLOPT_ALLOW_BEAST),
NV(CURLSSLOPT_NO_REVOKE),
NVEND,
};
const NameValue setopt_nv_CURL_NETRC[] = {
NV(CURL_NETRC_IGNORED),
NV(CURL_NETRC_OPTIONAL),
NV(CURL_NETRC_REQUIRED),
NVEND,
};
/* These mappings essentially triplicated - see
* tool_libinfo.c and tool_paramhlp.c */
const NameValue setopt_nv_CURLPROTO[] = {
NV(CURLPROTO_ALL), /* combination */
NV(CURLPROTO_DICT),
NV(CURLPROTO_FILE),
NV(CURLPROTO_FTP),
NV(CURLPROTO_FTPS),
NV(CURLPROTO_GOPHER),
NV(CURLPROTO_HTTP),
NV(CURLPROTO_HTTPS),
NV(CURLPROTO_IMAP),
NV(CURLPROTO_IMAPS),
NV(CURLPROTO_LDAP),
NV(CURLPROTO_LDAPS),
NV(CURLPROTO_POP3),
NV(CURLPROTO_POP3S),
NV(CURLPROTO_RTSP),
NV(CURLPROTO_SCP),
NV(CURLPROTO_SFTP),
NV(CURLPROTO_SMB),
NV(CURLPROTO_SMBS),
NV(CURLPROTO_SMTP),
NV(CURLPROTO_SMTPS),
NV(CURLPROTO_TELNET),
NV(CURLPROTO_TFTP),
NVEND,
};
/* These options have non-zero default values. */
static const NameValue setopt_nv_CURLNONZERODEFAULTS[] = {
NV1(CURLOPT_SSL_VERIFYPEER, 1),
NV1(CURLOPT_SSL_VERIFYHOST, 1),
NV1(CURLOPT_SSL_ENABLE_NPN, 1),
NV1(CURLOPT_SSL_ENABLE_ALPN, 1),
NV1(CURLOPT_TCP_NODELAY, 1),
NV1(CURLOPT_PROXY_SSL_VERIFYPEER, 1),
NV1(CURLOPT_PROXY_SSL_VERIFYHOST, 1),
NV1(CURLOPT_SOCKS5_AUTH, 1),
NVEND
};
/* Format and add code; jump to nomem on malloc error */
#define ADD(args) do { \
ret = easysrc_add args; \
if(ret) \
goto nomem; \
} WHILE_FALSE
#define ADDF(args) do { \
ret = easysrc_addf args; \
if(ret) \
goto nomem; \
} WHILE_FALSE
#define DECL0(s) ADD((&easysrc_decl, s))
#define DECL1(f,a) ADDF((&easysrc_decl, f,a))
#define DATA0(s) ADD((&easysrc_data, s))
#define DATA1(f,a) ADDF((&easysrc_data, f,a))
#define DATA2(f,a,b) ADDF((&easysrc_data, f,a,b))
#define DATA3(f,a,b,c) ADDF((&easysrc_data, f,a,b,c))
#define CODE0(s) ADD((&easysrc_code, s))
#define CODE1(f,a) ADDF((&easysrc_code, f,a))
#define CODE2(f,a,b) ADDF((&easysrc_code, f,a,b))
#define CODE3(f,a,b,c) ADDF((&easysrc_code, f,a,b,c))
#define CLEAN0(s) ADD((&easysrc_clean, s))
#define CLEAN1(f,a) ADDF((&easysrc_clean, f,a))
#define REM0(s) ADD((&easysrc_toohard, s))
#define REM1(f,a) ADDF((&easysrc_toohard, f,a))
#define REM2(f,a,b) ADDF((&easysrc_toohard, f,a,b))
/* Escape string to C string syntax. Return NULL if out of memory.
* Is this correct for those wacky EBCDIC guys? */
static char *c_escape(const char *str, size_t len)
{
const char *s;
unsigned char c;
char *escaped, *e;
if(len == CURL_ZERO_TERMINATED)
len = strlen(str);
/* Check for possible overflow. */
if(len > (~(size_t) 0) / 4)
return NULL;
/* Allocate space based on worst-case */
escaped = malloc(4 * len + 1);
if(!escaped)
return NULL;
e = escaped;
for(s = str; (c = *s) != '\0'; s++) {
if(c == '\n') {
strcpy(e, "\\n");
e += 2;
}
else if(c == '\r') {
strcpy(e, "\\r");
e += 2;
}
else if(c == '\t') {
strcpy(e, "\\t");
e += 2;
}
else if(c == '\\') {
strcpy(e, "\\\\");
e += 2;
}
else if(c == '"') {
strcpy(e, "\\\"");
e += 2;
}
else if(! isprint(c)) {
snprintf(e, 5, "\\%03o", (unsigned)c);
e += 4;
}
else
*e++ = c;
}
*e = '\0';
return escaped;
}
/* setopt wrapper for enum types */
CURLcode tool_setopt_enum(CURL *curl, struct GlobalConfig *config,
const char *name, CURLoption tag,
const NameValue *nvlist, long lval)
{
CURLcode ret = CURLE_OK;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, lval);
if(!lval)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
const NameValue *nv = NULL;
for(nv = nvlist; nv->name; nv++) {
if(nv->value == lval) break; /* found it */
}
if(! nv->name) {
/* If no definition was found, output an explicit value.
* This could happen if new values are defined and used
* but the NameValue list is not updated. */
CODE2("curl_easy_setopt(hnd, %s, %ldL);", name, lval);
}
else {
CODE2("curl_easy_setopt(hnd, %s, (long)%s);", name, nv->name);
}
}
nomem:
return ret;
}
/* setopt wrapper for flags */
CURLcode tool_setopt_flags(CURL *curl, struct GlobalConfig *config,
const char *name, CURLoption tag,
const NameValue *nvlist, long lval)
{
CURLcode ret = CURLE_OK;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, lval);
if(!lval)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
char preamble[80]; /* should accommodate any symbol name */
long rest = lval; /* bits not handled yet */
const NameValue *nv = NULL;
snprintf(preamble, sizeof(preamble),
"curl_easy_setopt(hnd, %s, ", name);
for(nv = nvlist; nv->name; nv++) {
if((nv->value & ~ rest) == 0) {
/* all value flags contained in rest */
rest &= ~ nv->value; /* remove bits handled here */
CODE3("%s(long)%s%s",
preamble, nv->name, rest ? " |" : ");");
if(!rest)
break; /* handled them all */
/* replace with all spaces for continuation line */
snprintf(preamble, sizeof(preamble), "%*s", strlen(preamble), "");
}
}
/* If any bits have no definition, output an explicit value.
* This could happen if new bits are defined and used
* but the NameValue list is not updated. */
if(rest)
CODE2("%s%ldL);", preamble, rest);
}
nomem:
return ret;
}
/* setopt wrapper for bitmasks */
CURLcode tool_setopt_bitmask(CURL *curl, struct GlobalConfig *config,
const char *name, CURLoption tag,
const NameValueUnsigned *nvlist,
long lval)
{
CURLcode ret = CURLE_OK;
bool skip = FALSE;
ret = curl_easy_setopt(curl, tag, lval);
if(!lval)
skip = TRUE;
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
char preamble[80];
unsigned long rest = (unsigned long)lval;
const NameValueUnsigned *nv = NULL;
snprintf(preamble, sizeof(preamble),
"curl_easy_setopt(hnd, %s, ", name);
for(nv = nvlist; nv->name; nv++) {
if((nv->value & ~ rest) == 0) {
/* all value flags contained in rest */
rest &= ~ nv->value; /* remove bits handled here */
CODE3("%s(long)%s%s",
preamble, nv->name, rest ? " |" : ");");
if(!rest)
break; /* handled them all */
/* replace with all spaces for continuation line */
snprintf(preamble, sizeof(preamble), "%*s", strlen(preamble), "");
}
}
/* If any bits have no definition, output an explicit value.
* This could happen if new bits are defined and used
* but the NameValue list is not updated. */
if(rest)
CODE2("%s%luUL);", preamble, rest);
}
nomem:
return ret;
}
/* Generate code for a struct curl_slist. */
static CURLcode libcurl_generate_slist(struct curl_slist *slist, int *slistno)
{
CURLcode ret = CURLE_OK;
char *escaped = NULL;
/* May need several slist variables, so invent name */
*slistno = ++easysrc_slist_count;
DECL1("struct curl_slist *slist%d;", *slistno);
DATA1("slist%d = NULL;", *slistno);
CLEAN1("curl_slist_free_all(slist%d);", *slistno);
CLEAN1("slist%d = NULL;", *slistno);
for(; slist; slist = slist->next) {
Curl_safefree(escaped);
escaped = c_escape(slist->data, CURL_ZERO_TERMINATED);
if(!escaped)
return CURLE_OUT_OF_MEMORY;
DATA3("slist%d = curl_slist_append(slist%d, \"%s\");",
*slistno, *slistno, escaped);
}
nomem:
Curl_safefree(escaped);
return ret;
}
/* Generate source code for a mime structure. */
static CURLcode libcurl_generate_mime(curl_mime *mime, int *mimeno)
{
CURLcode ret = CURLE_OK;
int i;
curl_off_t size;
curl_mimepart *part;
char *filename;
char *escaped = NULL;
char *cp;
char *data;
/* May need several mime variables, so invent name */
*mimeno = ++easysrc_mime_count;
DECL1("curl_mime *mime%d;", *mimeno);
DATA1("mime%d = NULL;", *mimeno);
CODE1("mime%d = curl_mime_init(hnd);", *mimeno);
CLEAN1("curl_mime_free(mime%d);", *mimeno);
CLEAN1("mime%d = NULL;", *mimeno);
if(mime->firstpart) {
DECL1("curl_mimepart *part%d;", *mimeno);
for(part = mime->firstpart; part; part = part->nextpart) {
CODE2("part%d = curl_mime_addpart(mime%d);", *mimeno, *mimeno);
filename = part->filename;
switch(part->kind) {
case MIMEKIND_FILE:
Curl_safefree(escaped);
escaped = c_escape(part->data, CURL_ZERO_TERMINATED);
if(!escaped)
return CURLE_OUT_OF_MEMORY;
CODE2("curl_mime_filedata(part%d, \"%s\");", *mimeno, escaped);
if(!filename)
CODE1("curl_mime_filename(part%d, NULL);", *mimeno);
else {
/* Fast check to see if remote file name is base name. */
filename = part->data;
for(cp = filename; *cp; cp++)
if(*cp == '/' || *cp == '\\')
filename = cp + 1;
if(!part->filename || !strcmp(filename, part->filename))
filename = NULL;
else
filename = part->filename;
}
break;
case MIMEKIND_CALLBACK:
/* Can only be reading stdin in the current context. */
CODE1("curl_mime_data_cb(part%d, -1, (curl_read_callback) fread, \\",
*mimeno);
CODE0(" (curl_seek_callback) fseek, NULL, stdin);");
break;
case MIMEKIND_DATA:
#ifdef CURL_DOES_CONVERSIONS
/* Data is stored in ASCII and we want in in the host character
code. Convert it back for output. */
data = malloc(part->datasize + 1);
if(!data) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
memcpy(data, part->data, part->datasize + 1);
ret = convert_from_network(data, strlen(data));
if(ret) {
Curl_safefree(data);
goto nomem;
}
#else
data = part->data;
#endif
/* Are there any nul byte in data? */
for(cp = data; *cp; cp++)
;
size = (cp == data + part->datasize)? (curl_off_t) -1: part->datasize;
Curl_safefree(escaped);
escaped = c_escape(data, (size_t) part->datasize);
#ifdef CURL_DOES_CONVERSIONS
Curl_safefree(data);
#endif
if(!escaped)
return CURLE_OUT_OF_MEMORY;
if(size >= 0)
CODE3("curl_mime_data(part%d, \"%s\", %" CURL_FORMAT_CURL_OFF_T ");",
*mimeno, escaped, size);
else
CODE2("curl_mime_data(part%d, \"%s\", CURL_ZERO_TERMINATED);",
*mimeno, escaped);
break;
case MIMEKIND_MULTIPART:
ret = libcurl_generate_mime(part->arg, &i);
if(ret)
goto nomem;
CODE2("curl_mime_subparts(part%d, mime%d);", *mimeno, i);
CODE1("mime%d = NULL;", i); /* Avoid freeing in CLEAN sequence. */
break;
default:
/* Other cases not possible in this context. */
break;
}
if(part->encoder) {
Curl_safefree(escaped);
escaped = c_escape(part->encoder->name, CURL_ZERO_TERMINATED);
if(!escaped)
return CURLE_OUT_OF_MEMORY;
CODE2("curl_mime_encoder(part%d, \"%s\");", *mimeno, escaped);
}
if(filename) {
Curl_safefree(escaped);
escaped = c_escape(filename, CURL_ZERO_TERMINATED);
if(!escaped)
return CURLE_OUT_OF_MEMORY;
CODE2("curl_mime_filename(part%d, \"%s\");", *mimeno, escaped);
}
if(part->name) {
Curl_safefree(escaped);
escaped = c_escape(part->name, CURL_ZERO_TERMINATED);
if(!escaped)
return CURLE_OUT_OF_MEMORY;
CODE2("curl_mime_name(part%d, \"%s\");", *mimeno, escaped);
}
if(part->mimetype) {
Curl_safefree(escaped);
escaped = c_escape(part->mimetype, CURL_ZERO_TERMINATED);
if(!escaped)
return CURLE_OUT_OF_MEMORY;
CODE2("curl_mime_type(part%d, \"%s\");", *mimeno, escaped);
}
if(part->userheaders) {
int ownership = part->flags & MIME_USERHEADERS_OWNER? 1: 0;
ret = libcurl_generate_slist(part->userheaders, &i);
if(ret)
goto nomem;
CODE3("curl_mime_headers(part%d, slist%d, %d);",
*mimeno, i, ownership);
if(ownership)
CODE1("slist%d = NULL;", i); /* Prevent freeing in CLEAN sequence. */
}
}
}
nomem:
Curl_safefree(escaped);
return ret;
}
/* setopt wrapper for CURLOPT_MIMEPOST */
CURLcode tool_setopt_mimepost(CURL *curl, struct GlobalConfig *config,
const char *name, CURLoption tag,
curl_mime *mimepost)
{
CURLcode ret = CURLE_OK;
ret = curl_easy_setopt(curl, tag, mimepost);
if(config->libcurl && mimepost && !ret) {
int i;
ret = libcurl_generate_mime(mimepost, &i);
if(!ret)
CODE2("curl_easy_setopt(hnd, %s, mime%d);", name, i);
}
nomem:
return ret;
}
/* setopt wrapper for curl_slist options */
CURLcode tool_setopt_slist(CURL *curl, struct GlobalConfig *config,
const char *name, CURLoption tag,
struct curl_slist *list)
{
CURLcode ret = CURLE_OK;
ret = curl_easy_setopt(curl, tag, list);
if(config->libcurl && list && !ret) {
int i;
ret = libcurl_generate_slist(list, &i);
if(!ret)
CODE2("curl_easy_setopt(hnd, %s, slist%d);", name, i);
}
nomem:
return ret;
}
/* generic setopt wrapper for all other options.
* Some type information is encoded in the tag value. */
CURLcode tool_setopt(CURL *curl, bool str, struct GlobalConfig *config,
const char *name, CURLoption tag, ...)
{
va_list arg;
char buf[256];
const char *value = NULL;
bool remark = FALSE;
bool skip = FALSE;
bool escape = FALSE;
char *escaped = NULL;
CURLcode ret = CURLE_OK;
va_start(arg, tag);
if(tag < CURLOPTTYPE_OBJECTPOINT) {
/* Value is expected to be a long */
long lval = va_arg(arg, long);
long defval = 0L;
const NameValue *nv = NULL;
for(nv = setopt_nv_CURLNONZERODEFAULTS; nv->name; nv++) {
if(!strcmp(name, nv->name)) {
defval = nv->value;
break; /* found it */
}
}
snprintf(buf, sizeof(buf), "%ldL", lval);
value = buf;
ret = curl_easy_setopt(curl, tag, lval);
if(lval == defval)
skip = TRUE;
}
else if(tag < CURLOPTTYPE_OFF_T) {
/* Value is some sort of object pointer */
void *pval = va_arg(arg, void *);
/* function pointers are never printable */
if(tag >= CURLOPTTYPE_FUNCTIONPOINT) {
if(pval) {
value = "functionpointer";
remark = TRUE;
}
else
skip = TRUE;
}
else if(pval && str) {
value = (char *)pval;
escape = TRUE;
}
else if(pval) {
value = "objectpointer";
remark = TRUE;
}
else
skip = TRUE;
ret = curl_easy_setopt(curl, tag, pval);
}
else {
/* Value is expected to be curl_off_t */
curl_off_t oval = va_arg(arg, curl_off_t);
snprintf(buf, sizeof(buf),
"(curl_off_t)%" CURL_FORMAT_CURL_OFF_T, oval);
value = buf;
ret = curl_easy_setopt(curl, tag, oval);
if(!oval)
skip = TRUE;
}
va_end(arg);
if(config->libcurl && !skip && !ret) {
/* we only use this for real if --libcurl was used */
if(remark)
REM2("%s set to a %s", name, value);
else {
if(escape) {
escaped = c_escape(value, CURL_ZERO_TERMINATED);
if(!escaped) {
ret = CURLE_OUT_OF_MEMORY;
goto nomem;
}
CODE2("curl_easy_setopt(hnd, %s, \"%s\");", name, escaped);
}
else
CODE2("curl_easy_setopt(hnd, %s, %s);", name, value);
}
}
nomem:
Curl_safefree(escaped);
return ret;
}
#endif /* CURL_DISABLE_LIBCURL_OPTION */
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