diff options
Diffstat (limited to 'libcurl/src/lib/socks.c')
| -rw-r--r-- | libcurl/src/lib/socks.c | 755 |
1 files changed, 0 insertions, 755 deletions
diff --git a/libcurl/src/lib/socks.c b/libcurl/src/lib/socks.c deleted file mode 100644 index 9dfe097..0000000 --- a/libcurl/src/lib/socks.c +++ /dev/null @@ -1,755 +0,0 @@ -/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2015, 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 http://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 "curl_setup.h"
-
-#if !defined(CURL_DISABLE_PROXY)
-
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-
-#include "urldata.h"
-#include "sendf.h"
-#include "strequal.h"
-#include "select.h"
-#include "connect.h"
-#include "timeval.h"
-#include "socks.h"
-
-/* The last #include file should be: */
-#include "memdebug.h"
-
-/*
- * Helper read-from-socket functions. Does the same as Curl_read() but it
- * blocks until all bytes amount of buffersize will be read. No more, no less.
- *
- * This is STUPID BLOCKING behaviour which we frown upon, but right now this
- * is what we have...
- */
-int Curl_blockread_all(struct connectdata *conn, /* connection data */
- curl_socket_t sockfd, /* read from this socket */
- char *buf, /* store read data here */
- ssize_t buffersize, /* max amount to read */
- ssize_t *n) /* amount bytes read */
-{
- ssize_t nread;
- ssize_t allread = 0;
- int result;
- long timeleft;
- *n = 0;
- for(;;) {
- timeleft = Curl_timeleft(conn->data, NULL, TRUE);
- if(timeleft < 0) {
- /* we already got the timeout */
- result = CURLE_OPERATION_TIMEDOUT;
- break;
- }
- if(Curl_socket_ready(sockfd, CURL_SOCKET_BAD, timeleft) <= 0) {
- result = ~CURLE_OK;
- break;
- }
- result = Curl_read_plain(sockfd, buf, buffersize, &nread);
- if(CURLE_AGAIN == result)
- continue;
- else if(result)
- break;
-
- if(buffersize == nread) {
- allread += nread;
- *n = allread;
- result = CURLE_OK;
- break;
- }
- if(!nread) {
- result = ~CURLE_OK;
- break;
- }
-
- buffersize -= nread;
- buf += nread;
- allread += nread;
- }
- return result;
-}
-
-/*
-* This function logs in to a SOCKS4 proxy and sends the specifics to the final
-* destination server.
-*
-* Reference :
-* http://socks.permeo.com/protocol/socks4.protocol
-*
-* Note :
-* Set protocol4a=true for "SOCKS 4A (Simple Extension to SOCKS 4 Protocol)"
-* Nonsupport "Identification Protocol (RFC1413)"
-*/
-CURL_STATIC CURLcode Curl_SOCKS4(const char *proxy_name,
- const char *hostname,
- int remote_port,
- int sockindex,
- struct connectdata *conn,
- bool protocol4a)
-{
-#define SOCKS4REQLEN 262
- unsigned char socksreq[SOCKS4REQLEN]; /* room for SOCKS4 request incl. user
- id */
- int result;
- CURLcode code;
- curl_socket_t sock = conn->sock[sockindex];
- struct SessionHandle *data = conn->data;
-
- if(Curl_timeleft(data, NULL, TRUE) < 0) {
- /* time-out, bail out, go home */
- failf(data, "Connection time-out");
- return CURLE_OPERATION_TIMEDOUT;
- }
-
- (void)curlx_nonblock(sock, FALSE);
-
- infof(data, "SOCKS4 communication to %s:%d\n", hostname, remote_port);
-
- /*
- * Compose socks4 request
- *
- * Request format
- *
- * +----+----+----+----+----+----+----+----+----+----+....+----+
- * | VN | CD | DSTPORT | DSTIP | USERID |NULL|
- * +----+----+----+----+----+----+----+----+----+----+....+----+
- * # of bytes: 1 1 2 4 variable 1
- */
-
- socksreq[0] = 4; /* version (SOCKS4) */
- socksreq[1] = 1; /* connect */
- socksreq[2] = (unsigned char)((remote_port >> 8) & 0xff); /* PORT MSB */
- socksreq[3] = (unsigned char)(remote_port & 0xff); /* PORT LSB */
-
- /* DNS resolve only for SOCKS4, not SOCKS4a */
- if(!protocol4a) {
- struct Curl_dns_entry *dns;
- Curl_addrinfo *hp=NULL;
- int rc;
-
- rc = Curl_resolv(conn, hostname, remote_port, &dns);
-
- if(rc == CURLRESOLV_ERROR)
- return CURLE_COULDNT_RESOLVE_PROXY;
-
- if(rc == CURLRESOLV_PENDING)
- /* ignores the return code, but 'dns' remains NULL on failure */
- (void)Curl_resolver_wait_resolv(conn, &dns);
-
- /*
- * We cannot use 'hostent' as a struct that Curl_resolv() returns. It
- * returns a Curl_addrinfo pointer that may not always look the same.
- */
- if(dns)
- hp=dns->addr;
- if(hp) {
- char buf[64];
- unsigned short ip[4];
- Curl_printable_address(hp, buf, sizeof(buf));
-
- if(4 == sscanf( buf, "%hu.%hu.%hu.%hu",
- &ip[0], &ip[1], &ip[2], &ip[3])) {
- /* Set DSTIP */
- socksreq[4] = (unsigned char)ip[0];
- socksreq[5] = (unsigned char)ip[1];
- socksreq[6] = (unsigned char)ip[2];
- socksreq[7] = (unsigned char)ip[3];
- }
- else
- hp = NULL; /* fail! */
-
- infof(data, "SOCKS4 connect to %s (locally resolved)\n", buf);
-
- Curl_resolv_unlock(data, dns); /* not used anymore from now on */
-
- }
- if(!hp) {
- failf(data, "Failed to resolve \"%s\" for SOCKS4 connect.",
- hostname);
- return CURLE_COULDNT_RESOLVE_HOST;
- }
- }
-
- /*
- * This is currently not supporting "Identification Protocol (RFC1413)".
- */
- socksreq[8] = 0; /* ensure empty userid is NUL-terminated */
- if(proxy_name) {
- size_t plen = strlen(proxy_name);
- if(plen >= sizeof(socksreq) - 8) {
- failf(data, "Too long SOCKS proxy name, can't use!\n");
- return CURLE_COULDNT_CONNECT;
- }
- /* copy the proxy name WITH trailing zero */
- memcpy(socksreq + 8, proxy_name, plen+1);
- }
-
- /*
- * Make connection
- */
- {
- ssize_t actualread;
- ssize_t written;
- ssize_t hostnamelen = 0;
- int packetsize = 9 +
- (int)strlen((char*)socksreq + 8); /* size including NUL */
-
- /* If SOCKS4a, set special invalid IP address 0.0.0.x */
- if(protocol4a) {
- socksreq[4] = 0;
- socksreq[5] = 0;
- socksreq[6] = 0;
- socksreq[7] = 1;
- /* If still enough room in buffer, also append hostname */
- hostnamelen = (ssize_t)strlen(hostname) + 1; /* length including NUL */
- if(packetsize + hostnamelen <= SOCKS4REQLEN)
- strcpy((char*)socksreq + packetsize, hostname);
- else
- hostnamelen = 0; /* Flag: hostname did not fit in buffer */
- }
-
- /* Send request */
- code = Curl_write_plain(conn, sock, (char *)socksreq,
- packetsize + hostnamelen,
- &written);
- if(code || (written != packetsize + hostnamelen)) {
- failf(data, "Failed to send SOCKS4 connect request.");
- return CURLE_COULDNT_CONNECT;
- }
- if(protocol4a && hostnamelen == 0) {
- /* SOCKS4a with very long hostname - send that name separately */
- hostnamelen = (ssize_t)strlen(hostname) + 1;
- code = Curl_write_plain(conn, sock, (char *)hostname, hostnamelen,
- &written);
- if(code || (written != hostnamelen)) {
- failf(data, "Failed to send SOCKS4 connect request.");
- return CURLE_COULDNT_CONNECT;
- }
- }
-
- packetsize = 8; /* receive data size */
-
- /* Receive response */
- result = Curl_blockread_all(conn, sock, (char *)socksreq, packetsize,
- &actualread);
- if(result || (actualread != packetsize)) {
- failf(data, "Failed to receive SOCKS4 connect request ack.");
- return CURLE_COULDNT_CONNECT;
- }
-
- /*
- * Response format
- *
- * +----+----+----+----+----+----+----+----+
- * | VN | CD | DSTPORT | DSTIP |
- * +----+----+----+----+----+----+----+----+
- * # of bytes: 1 1 2 4
- *
- * VN is the version of the reply code and should be 0. CD is the result
- * code with one of the following values:
- *
- * 90: request granted
- * 91: request rejected or failed
- * 92: request rejected because SOCKS server cannot connect to
- * identd on the client
- * 93: request rejected because the client program and identd
- * report different user-ids
- */
-
- /* wrong version ? */
- if(socksreq[0] != 0) {
- failf(data,
- "SOCKS4 reply has wrong version, version should be 4.");
- return CURLE_COULDNT_CONNECT;
- }
-
- /* Result */
- switch(socksreq[1]) {
- case 90:
- infof(data, "SOCKS4%s request granted.\n", protocol4a?"a":"");
- break;
- case 91:
- failf(data,
- "Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
- ", request rejected or failed.",
- (unsigned char)socksreq[4], (unsigned char)socksreq[5],
- (unsigned char)socksreq[6], (unsigned char)socksreq[7],
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- return CURLE_COULDNT_CONNECT;
- case 92:
- failf(data,
- "Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
- ", request rejected because SOCKS server cannot connect to "
- "identd on the client.",
- (unsigned char)socksreq[4], (unsigned char)socksreq[5],
- (unsigned char)socksreq[6], (unsigned char)socksreq[7],
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- return CURLE_COULDNT_CONNECT;
- case 93:
- failf(data,
- "Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
- ", request rejected because the client program and identd "
- "report different user-ids.",
- (unsigned char)socksreq[4], (unsigned char)socksreq[5],
- (unsigned char)socksreq[6], (unsigned char)socksreq[7],
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- return CURLE_COULDNT_CONNECT;
- default:
- failf(data,
- "Can't complete SOCKS4 connection to %d.%d.%d.%d:%d. (%d)"
- ", Unknown.",
- (unsigned char)socksreq[4], (unsigned char)socksreq[5],
- (unsigned char)socksreq[6], (unsigned char)socksreq[7],
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- return CURLE_COULDNT_CONNECT;
- }
- }
-
- (void)curlx_nonblock(sock, TRUE);
-
- return CURLE_OK; /* Proxy was successful! */
-}
-
-/*
- * This function logs in to a SOCKS5 proxy and sends the specifics to the final
- * destination server.
- */
-CURLcode Curl_SOCKS5(const char *proxy_name,
- const char *proxy_password,
- const char *hostname,
- int remote_port,
- int sockindex,
- struct connectdata *conn)
-{
- /*
- According to the RFC1928, section "6. Replies". This is what a SOCK5
- replies:
-
- +----+-----+-------+------+----------+----------+
- |VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
- +----+-----+-------+------+----------+----------+
- | 1 | 1 | X'00' | 1 | Variable | 2 |
- +----+-----+-------+------+----------+----------+
-
- Where:
-
- o VER protocol version: X'05'
- o REP Reply field:
- o X'00' succeeded
- */
-
- unsigned char socksreq[600]; /* room for large user/pw (255 max each) */
- ssize_t actualread;
- ssize_t written;
- int result;
- CURLcode code;
- curl_socket_t sock = conn->sock[sockindex];
- struct SessionHandle *data = conn->data;
- long timeout;
- bool socks5_resolve_local = (conn->proxytype == CURLPROXY_SOCKS5)?TRUE:FALSE;
- const size_t hostname_len = strlen(hostname);
- ssize_t len = 0;
-
- /* RFC1928 chapter 5 specifies max 255 chars for domain name in packet */
- if(!socks5_resolve_local && hostname_len > 255) {
- infof(conn->data, "SOCKS5: server resolving disabled for hostnames of "
- "length > 255 [actual len=%zu]\n", hostname_len);
- socks5_resolve_local = TRUE;
- }
-
- /* get timeout */
- timeout = Curl_timeleft(data, NULL, TRUE);
-
- if(timeout < 0) {
- /* time-out, bail out, go home */
- failf(data, "Connection time-out");
- return CURLE_OPERATION_TIMEDOUT;
- }
-
- (void)curlx_nonblock(sock, TRUE);
-
- /* wait until socket gets connected */
- result = Curl_socket_ready(CURL_SOCKET_BAD, sock, timeout);
-
- if(-1 == result) {
- failf(conn->data, "SOCKS5: no connection here");
- return CURLE_COULDNT_CONNECT;
- }
- else if(0 == result) {
- failf(conn->data, "SOCKS5: connection timeout");
- return CURLE_OPERATION_TIMEDOUT;
- }
-
- if(result & CURL_CSELECT_ERR) {
- failf(conn->data, "SOCKS5: error occurred during connection");
- return CURLE_COULDNT_CONNECT;
- }
-
- socksreq[0] = 5; /* version */
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- socksreq[1] = (char)(proxy_name ? 3 : 2); /* number of methods (below) */
- socksreq[2] = 0; /* no authentication */
- socksreq[3] = 1; /* GSS-API */
- socksreq[4] = 2; /* username/password */
-#else
- socksreq[1] = (char)(proxy_name ? 2 : 1); /* number of methods (below) */
- socksreq[2] = 0; /* no authentication */
- socksreq[3] = 2; /* username/password */
-#endif
-
- (void)curlx_nonblock(sock, FALSE);
-
- code = Curl_write_plain(conn, sock, (char *)socksreq, (2 + (int)socksreq[1]),
- &written);
- if(code || (written != (2 + (int)socksreq[1]))) {
- failf(data, "Unable to send initial SOCKS5 request.");
- return CURLE_COULDNT_CONNECT;
- }
-
- (void)curlx_nonblock(sock, TRUE);
-
- result = Curl_socket_ready(sock, CURL_SOCKET_BAD, timeout);
-
- if(-1 == result) {
- failf(conn->data, "SOCKS5 nothing to read");
- return CURLE_COULDNT_CONNECT;
- }
- else if(0 == result) {
- failf(conn->data, "SOCKS5 read timeout");
- return CURLE_OPERATION_TIMEDOUT;
- }
-
- if(result & CURL_CSELECT_ERR) {
- failf(conn->data, "SOCKS5 read error occurred");
- return CURLE_RECV_ERROR;
- }
-
- (void)curlx_nonblock(sock, FALSE);
-
- result=Curl_blockread_all(conn, sock, (char *)socksreq, 2, &actualread);
- if(result || (actualread != 2)) {
- failf(data, "Unable to receive initial SOCKS5 response.");
- return CURLE_COULDNT_CONNECT;
- }
-
- if(socksreq[0] != 5) {
- failf(data, "Received invalid version in initial SOCKS5 response.");
- return CURLE_COULDNT_CONNECT;
- }
- if(socksreq[1] == 0) {
- /* Nothing to do, no authentication needed */
- ;
- }
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- else if(socksreq[1] == 1) {
- code = Curl_SOCKS5_gssapi_negotiate(sockindex, conn);
- if(code) {
- failf(data, "Unable to negotiate SOCKS5 GSS-API context.");
- return CURLE_COULDNT_CONNECT;
- }
- }
-#endif
- else if(socksreq[1] == 2) {
- /* Needs user name and password */
- size_t proxy_name_len, proxy_password_len;
- if(proxy_name && proxy_password) {
- proxy_name_len = strlen(proxy_name);
- proxy_password_len = strlen(proxy_password);
- }
- else {
- proxy_name_len = 0;
- proxy_password_len = 0;
- }
-
- /* username/password request looks like
- * +----+------+----------+------+----------+
- * |VER | ULEN | UNAME | PLEN | PASSWD |
- * +----+------+----------+------+----------+
- * | 1 | 1 | 1 to 255 | 1 | 1 to 255 |
- * +----+------+----------+------+----------+
- */
- len = 0;
- socksreq[len++] = 1; /* username/pw subnegotiation version */
- socksreq[len++] = (unsigned char) proxy_name_len;
- if(proxy_name && proxy_name_len)
- memcpy(socksreq + len, proxy_name, proxy_name_len);
- len += proxy_name_len;
- socksreq[len++] = (unsigned char) proxy_password_len;
- if(proxy_password && proxy_password_len)
- memcpy(socksreq + len, proxy_password, proxy_password_len);
- len += proxy_password_len;
-
- code = Curl_write_plain(conn, sock, (char *)socksreq, len, &written);
- if(code || (len != written)) {
- failf(data, "Failed to send SOCKS5 sub-negotiation request.");
- return CURLE_COULDNT_CONNECT;
- }
-
- result=Curl_blockread_all(conn, sock, (char *)socksreq, 2, &actualread);
- if(result || (actualread != 2)) {
- failf(data, "Unable to receive SOCKS5 sub-negotiation response.");
- return CURLE_COULDNT_CONNECT;
- }
-
- /* ignore the first (VER) byte */
- if(socksreq[1] != 0) { /* status */
- failf(data, "User was rejected by the SOCKS5 server (%d %d).",
- socksreq[0], socksreq[1]);
- return CURLE_COULDNT_CONNECT;
- }
-
- /* Everything is good so far, user was authenticated! */
- }
- else {
- /* error */
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- if(socksreq[1] == 255) {
-#else
- if(socksreq[1] == 1) {
- failf(data,
- "SOCKS5 GSSAPI per-message authentication is not supported.");
- return CURLE_COULDNT_CONNECT;
- }
- else if(socksreq[1] == 255) {
-#endif
- if(!proxy_name || !*proxy_name) {
- failf(data,
- "No authentication method was acceptable. (It is quite likely"
- " that the SOCKS5 server wanted a username/password, since none"
- " was supplied to the server on this connection.)");
- }
- else {
- failf(data, "No authentication method was acceptable.");
- }
- return CURLE_COULDNT_CONNECT;
- }
- else {
- failf(data,
- "Undocumented SOCKS5 mode attempted to be used by server.");
- return CURLE_COULDNT_CONNECT;
- }
- }
-
- /* Authentication is complete, now specify destination to the proxy */
- len = 0;
- socksreq[len++] = 5; /* version (SOCKS5) */
- socksreq[len++] = 1; /* connect */
- socksreq[len++] = 0; /* must be zero */
-
- if(!socks5_resolve_local) {
- socksreq[len++] = 3; /* ATYP: domain name = 3 */
- socksreq[len++] = (char) hostname_len; /* address length */
- memcpy(&socksreq[len], hostname, hostname_len); /* address str w/o NULL */
- len += hostname_len;
- }
- else {
- struct Curl_dns_entry *dns;
- Curl_addrinfo *hp = NULL;
- int rc = Curl_resolv(conn, hostname, remote_port, &dns);
-
- if(rc == CURLRESOLV_ERROR)
- return CURLE_COULDNT_RESOLVE_HOST;
-
- if(rc == CURLRESOLV_PENDING) {
- /* this requires that we're in "wait for resolve" state */
- code = Curl_resolver_wait_resolv(conn, &dns);
- if(code)
- return code;
- }
-
- /*
- * We cannot use 'hostent' as a struct that Curl_resolv() returns. It
- * returns a Curl_addrinfo pointer that may not always look the same.
- */
- if(dns)
- hp=dns->addr;
- if(hp) {
- struct sockaddr_in *saddr_in;
-#ifdef ENABLE_IPV6
- struct sockaddr_in6 *saddr_in6;
-#endif
- int i;
-
- if(hp->ai_family == AF_INET) {
- socksreq[len++] = 1; /* ATYP: IPv4 = 1 */
-
- saddr_in = (struct sockaddr_in*)hp->ai_addr;
- for(i = 0; i < 4; i++) {
- socksreq[len++] = ((unsigned char*)&saddr_in->sin_addr.s_addr)[i];
- infof(data, "%d\n", socksreq[len-1]);
- }
- }
-#ifdef ENABLE_IPV6
- else if(hp->ai_family == AF_INET6) {
- socksreq[len++] = 4; /* ATYP: IPv6 = 4 */
-
- saddr_in6 = (struct sockaddr_in6*)hp->ai_addr;
- for(i = 0; i < 16; i++) {
- socksreq[len++] = ((unsigned char*)&saddr_in6->sin6_addr.s6_addr)[i];
- }
- }
-#endif
- else
- hp = NULL; /* fail! */
-
- Curl_resolv_unlock(data, dns); /* not used anymore from now on */
- }
- if(!hp) {
- failf(data, "Failed to resolve \"%s\" for SOCKS5 connect.",
- hostname);
- return CURLE_COULDNT_RESOLVE_HOST;
- }
- }
-
- socksreq[len++] = (unsigned char)((remote_port >> 8) & 0xff); /* PORT MSB */
- socksreq[len++] = (unsigned char)(remote_port & 0xff); /* PORT LSB */
-
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- if(conn->socks5_gssapi_enctype) {
- failf(data, "SOCKS5 GSS-API protection not yet implemented.");
- }
- else
-#endif
- code = Curl_write_plain(conn, sock, (char *)socksreq, len, &written);
-
- if(code || (len != written)) {
- failf(data, "Failed to send SOCKS5 connect request.");
- return CURLE_COULDNT_CONNECT;
- }
-
- len = 10; /* minimum packet size is 10 */
-
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- if(conn->socks5_gssapi_enctype) {
- failf(data, "SOCKS5 GSS-API protection not yet implemented.");
- }
- else
-#endif
- result = Curl_blockread_all(conn, sock, (char *)socksreq,
- len, &actualread);
-
- if(result || (len != actualread)) {
- failf(data, "Failed to receive SOCKS5 connect request ack.");
- return CURLE_COULDNT_CONNECT;
- }
-
- if(socksreq[0] != 5) { /* version */
- failf(data,
- "SOCKS5 reply has wrong version, version should be 5.");
- return CURLE_COULDNT_CONNECT;
- }
- if(socksreq[1] != 0) { /* Anything besides 0 is an error */
- if(socksreq[3] == 1) {
- failf(data,
- "Can't complete SOCKS5 connection to %d.%d.%d.%d:%d. (%d)",
- (unsigned char)socksreq[4], (unsigned char)socksreq[5],
- (unsigned char)socksreq[6], (unsigned char)socksreq[7],
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- }
- else if(socksreq[3] == 3) {
- failf(data,
- "Can't complete SOCKS5 connection to %s:%d. (%d)",
- hostname,
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- }
- else if(socksreq[3] == 4) {
- failf(data,
- "Can't complete SOCKS5 connection to %02x%02x:%02x%02x:"
- "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%d. (%d)",
- (unsigned char)socksreq[4], (unsigned char)socksreq[5],
- (unsigned char)socksreq[6], (unsigned char)socksreq[7],
- (unsigned char)socksreq[8], (unsigned char)socksreq[9],
- (unsigned char)socksreq[10], (unsigned char)socksreq[11],
- (unsigned char)socksreq[12], (unsigned char)socksreq[13],
- (unsigned char)socksreq[14], (unsigned char)socksreq[15],
- (unsigned char)socksreq[16], (unsigned char)socksreq[17],
- (unsigned char)socksreq[18], (unsigned char)socksreq[19],
- ((socksreq[8] << 8) | socksreq[9]),
- socksreq[1]);
- }
- return CURLE_COULDNT_CONNECT;
- }
-
- /* Fix: in general, returned BND.ADDR is variable length parameter by RFC
- 1928, so the reply packet should be read until the end to avoid errors at
- subsequent protocol level.
-
- +----+-----+-------+------+----------+----------+
- |VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
- +----+-----+-------+------+----------+----------+
- | 1 | 1 | X'00' | 1 | Variable | 2 |
- +----+-----+-------+------+----------+----------+
-
- ATYP:
- o IP v4 address: X'01', BND.ADDR = 4 byte
- o domain name: X'03', BND.ADDR = [ 1 byte length, string ]
- o IP v6 address: X'04', BND.ADDR = 16 byte
- */
-
- /* Calculate real packet size */
- if(socksreq[3] == 3) {
- /* domain name */
- int addrlen = (int) socksreq[4];
- len = 5 + addrlen + 2;
- }
- else if(socksreq[3] == 4) {
- /* IPv6 */
- len = 4 + 16 + 2;
- }
-
- /* At this point we already read first 10 bytes */
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- if(!conn->socks5_gssapi_enctype) {
- /* decrypt_gssapi_blockread already read the whole packet */
-#endif
- if(len > 10) {
- len -= 10;
- result = Curl_blockread_all(conn, sock, (char *)&socksreq[10],
- len, &actualread);
- if(result || (len != actualread)) {
- failf(data, "Failed to receive SOCKS5 connect request ack.");
- return CURLE_COULDNT_CONNECT;
- }
- }
-#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
- }
-#endif
-
- (void)curlx_nonblock(sock, TRUE);
- return CURLE_OK; /* Proxy was successful! */
-}
-
-#endif /* CURL_DISABLE_PROXY */
-
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