diff options
Diffstat (limited to 'libpurple/proxy.c')
| -rw-r--r-- | libpurple/proxy.c | 1968 |
1 files changed, 1968 insertions, 0 deletions
diff --git a/libpurple/proxy.c b/libpurple/proxy.c new file mode 100644 index 0000000000..7d67cbe3dd --- /dev/null +++ b/libpurple/proxy.c @@ -0,0 +1,1968 @@ +/** + * @file proxy.c Proxy API + * @ingroup core + * + * gaim + * + * Gaim is the legal property of its developers, whose names are too numerous + * to list here. Please refer to the COPYRIGHT file distributed with this + * source distribution. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* this is a little piece of code to handle proxy connection */ +/* it is intended to : 1st handle http proxy, using the CONNECT command + , 2nd provide an easy way to add socks support + , 3rd draw women to it like flies to honey */ + +#include "internal.h" +#include "cipher.h" +#include "debug.h" +#include "dnsquery.h" +#include "notify.h" +#include "ntlm.h" +#include "prefs.h" +#include "proxy.h" +#include "util.h" + +struct _GaimProxyConnectData { + void *handle; + GaimProxyConnectFunction connect_cb; + gpointer data; + gchar *host; + int port; + int fd; + guint inpa; + GaimProxyInfo *gpi; + GaimDnsQueryData *query_data; + + /** + * This contains alternating length/char* values. The char* + * values need to be freed when removed from the linked list. + */ + GSList *hosts; + + /* + * All of the following variables are used when establishing a + * connection through a proxy. + */ + guchar *write_buffer; + gsize write_buf_len; + gsize written_len; + GaimInputFunction read_cb; + guchar *read_buffer; + gsize read_buf_len; + gsize read_len; +}; + +static const char *socks5errors[] = { + "succeeded\n", + "general SOCKS server failure\n", + "connection not allowed by ruleset\n", + "Network unreachable\n", + "Host unreachable\n", + "Connection refused\n", + "TTL expired\n", + "Command not supported\n", + "Address type not supported\n" +}; + +static GaimProxyInfo *global_proxy_info = NULL; + +static GSList *handles = NULL; + +static void try_connect(GaimProxyConnectData *connect_data); + +/************************************************************************** + * Proxy structure API + **************************************************************************/ +GaimProxyInfo * +gaim_proxy_info_new(void) +{ + return g_new0(GaimProxyInfo, 1); +} + +void +gaim_proxy_info_destroy(GaimProxyInfo *info) +{ + g_return_if_fail(info != NULL); + + g_free(info->host); + g_free(info->username); + g_free(info->password); + + g_free(info); +} + +void +gaim_proxy_info_set_type(GaimProxyInfo *info, GaimProxyType type) +{ + g_return_if_fail(info != NULL); + + info->type = type; +} + +void +gaim_proxy_info_set_host(GaimProxyInfo *info, const char *host) +{ + g_return_if_fail(info != NULL); + + g_free(info->host); + info->host = g_strdup(host); +} + +void +gaim_proxy_info_set_port(GaimProxyInfo *info, int port) +{ + g_return_if_fail(info != NULL); + + info->port = port; +} + +void +gaim_proxy_info_set_username(GaimProxyInfo *info, const char *username) +{ + g_return_if_fail(info != NULL); + + g_free(info->username); + info->username = g_strdup(username); +} + +void +gaim_proxy_info_set_password(GaimProxyInfo *info, const char *password) +{ + g_return_if_fail(info != NULL); + + g_free(info->password); + info->password = g_strdup(password); +} + +GaimProxyType +gaim_proxy_info_get_type(const GaimProxyInfo *info) +{ + g_return_val_if_fail(info != NULL, GAIM_PROXY_NONE); + + return info->type; +} + +const char * +gaim_proxy_info_get_host(const GaimProxyInfo *info) +{ + g_return_val_if_fail(info != NULL, NULL); + + return info->host; +} + +int +gaim_proxy_info_get_port(const GaimProxyInfo *info) +{ + g_return_val_if_fail(info != NULL, 0); + + return info->port; +} + +const char * +gaim_proxy_info_get_username(const GaimProxyInfo *info) +{ + g_return_val_if_fail(info != NULL, NULL); + + return info->username; +} + +const char * +gaim_proxy_info_get_password(const GaimProxyInfo *info) +{ + g_return_val_if_fail(info != NULL, NULL); + + return info->password; +} + +/************************************************************************** + * Global Proxy API + **************************************************************************/ +GaimProxyInfo * +gaim_global_proxy_get_info(void) +{ + return global_proxy_info; +} + +static GaimProxyInfo * +gaim_gnome_proxy_get_info(void) +{ + static GaimProxyInfo info = {0, NULL, 0, NULL, NULL}; + gchar *path; + if ((path = g_find_program_in_path("gconftool-2"))) { + gchar *tmp; + + g_free(path); + + /* See whether to use a proxy. */ + if (!g_spawn_command_line_sync("gconftool-2 -g /system/http_proxy/use_http_proxy", &tmp, + NULL, NULL, NULL)) + return gaim_global_proxy_get_info(); + if (!strcmp(tmp, "false\n")) { + info.type = GAIM_PROXY_NONE; + g_free(tmp); + return &info; + } else if (strcmp(tmp, "true\n")) { + g_free(tmp); + return gaim_global_proxy_get_info(); + } + + g_free(tmp); + info.type = GAIM_PROXY_HTTP; + + /* Free the old fields */ + if (info.host) { + g_free(info.host); + info.host = NULL; + } + if (info.username) { + g_free(info.username); + info.username = NULL; + } + if (info.password) { + g_free(info.password); + info.password = NULL; + } + + /* Get the new ones */ + if (!g_spawn_command_line_sync("gconftool-2 -g /system/http_proxy/host", &info.host, + NULL, NULL, NULL)) + return gaim_global_proxy_get_info(); + g_strchomp(info.host); + + if (!g_spawn_command_line_sync("gconftool-2 -g /system/http_proxy/authentication_user", &info.username, + NULL, NULL, NULL)) + return gaim_global_proxy_get_info(); + g_strchomp(info.username); + + if (!g_spawn_command_line_sync("gconftool-2 -g /system/http_proxy/authentication_password", &info.password, + NULL, NULL, NULL)) + return gaim_global_proxy_get_info(); + g_strchomp(info.password); + + if (!g_spawn_command_line_sync("gconftool-2 -g /system/http_proxy/port", &tmp, + NULL, NULL, NULL)) + return gaim_global_proxy_get_info(); + info.port = atoi(tmp); + g_free(tmp); + + return &info; + } + return gaim_global_proxy_get_info(); +} +/************************************************************************** + * Proxy API + **************************************************************************/ + +/** + * Whoever calls this needs to have called + * gaim_proxy_connect_data_disconnect() beforehand. + */ +static void +gaim_proxy_connect_data_destroy(GaimProxyConnectData *connect_data) +{ + handles = g_slist_remove(handles, connect_data); + + if (connect_data->query_data != NULL) + gaim_dnsquery_destroy(connect_data->query_data); + + while (connect_data->hosts != NULL) + { + /* Discard the length... */ + connect_data->hosts = g_slist_remove(connect_data->hosts, connect_data->hosts->data); + /* Free the address... */ + g_free(connect_data->hosts->data); + connect_data->hosts = g_slist_remove(connect_data->hosts, connect_data->hosts->data); + } + + g_free(connect_data->host); + g_free(connect_data); +} + +/** + * Free all information dealing with a connection attempt and + * reset the connect_data to prepare for it to try to connect + * to another IP address. + * + * If an error message is passed in, then we know the connection + * attempt failed. If the connection attempt failed and + * connect_data->hosts is not empty then we try the next IP address. + * If the connection attempt failed and we have no more hosts + * try try then we call the callback with the given error message, + * then destroy the connect_data. + * + * @param error_message An error message explaining why the connection + * failed. This will be passed to the callback function + * specified in the call to gaim_proxy_connect(). If the + * connection was successful then pass in null. + */ +static void +gaim_proxy_connect_data_disconnect(GaimProxyConnectData *connect_data, const gchar *error_message) +{ + if (connect_data->inpa > 0) + { + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + } + + if (connect_data->fd >= 0) + { + close(connect_data->fd); + connect_data->fd = -1; + } + + g_free(connect_data->write_buffer); + connect_data->write_buffer = NULL; + + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + if (error_message != NULL) + { + gaim_debug_info("proxy", "Connection attempt failed: %s\n", + error_message); + if (connect_data->hosts != NULL) + try_connect(connect_data); + else + { + /* Everything failed! Tell the originator of the request. */ + connect_data->connect_cb(connect_data->data, -1, error_message); + gaim_proxy_connect_data_destroy(connect_data); + } + } +} + +/** + * This calls gaim_proxy_connect_data_disconnect(), but it lets you + * specify the error_message using a printf()-like syntax. + */ +static void +gaim_proxy_connect_data_disconnect_formatted(GaimProxyConnectData *connect_data, const char *format, ...) +{ + va_list args; + gchar *tmp; + + va_start(args, format); + tmp = g_strdup_vprintf(format, args); + va_end(args); + + gaim_proxy_connect_data_disconnect(connect_data, tmp); + g_free(tmp); +} + +static void +gaim_proxy_connect_data_connected(GaimProxyConnectData *connect_data) +{ + connect_data->connect_cb(connect_data->data, connect_data->fd, NULL); + + /* + * We've passed the file descriptor to the protocol, so it's no longer + * our responsibility, and we should be careful not to free it when + * we destroy the connect_data. + */ + connect_data->fd = -1; + + gaim_proxy_connect_data_disconnect(connect_data, NULL); + gaim_proxy_connect_data_destroy(connect_data); +} + +static void +socket_ready_cb(gpointer data, gint source, GaimInputCondition cond) +{ + GaimProxyConnectData *connect_data = data; + socklen_t len; + int error = 0; + int ret; + + gaim_debug_info("proxy", "Connected.\n"); + + /* + * getsockopt after a non-blocking connect returns -1 if something is + * really messed up (bad descriptor, usually). Otherwise, it returns 0 and + * error holds what connect would have returned if it blocked until now. + * Thus, error == 0 is success, error == EINPROGRESS means "try again", + * and anything else is a real error. + * + * (error == EINPROGRESS can happen after a select because the kernel can + * be overly optimistic sometimes. select is just a hint that you might be + * able to do something.) + */ + len = sizeof(error); + ret = getsockopt(connect_data->fd, SOL_SOCKET, SO_ERROR, &error, &len); + + if (ret == 0 && error == EINPROGRESS) + /* No worries - we'll be called again later */ + /* TODO: Does this ever happen? */ + return; + + if (ret != 0 || error != 0) { + if (ret != 0) + error = errno; + gaim_proxy_connect_data_disconnect(connect_data, strerror(error)); + return; + } + + gaim_proxy_connect_data_connected(connect_data); +} + +static gboolean +clean_connect(gpointer data) +{ + gaim_proxy_connect_data_connected(data); + + return FALSE; +} + +static void +proxy_connect_none(GaimProxyConnectData *connect_data, struct sockaddr *addr, socklen_t addrlen) +{ + gaim_debug_info("proxy", "Connecting to %s:%d with no proxy\n", + connect_data->host, connect_data->port); + + connect_data->fd = socket(addr->sa_family, SOCK_STREAM, 0); + if (connect_data->fd < 0) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Unable to create socket:\n%s"), strerror(errno)); + return; + } + + fcntl(connect_data->fd, F_SETFL, O_NONBLOCK); +#ifndef _WIN32 + fcntl(connect_data->fd, F_SETFD, FD_CLOEXEC); +#endif + + if (connect(connect_data->fd, addr, addrlen) != 0) + { + if ((errno == EINPROGRESS) || (errno == EINTR)) + { + gaim_debug_info("proxy", "Connection in progress\n"); + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, socket_ready_cb, connect_data); + } + else + { + gaim_proxy_connect_data_disconnect(connect_data, strerror(errno)); + } + } + else + { + /* + * The connection happened IMMEDIATELY... strange, but whatever. + */ + socklen_t len; + int error = ETIMEDOUT; + int ret; + + gaim_debug_info("proxy", "Connected immediately.\n"); + + len = sizeof(error); + ret = getsockopt(connect_data->fd, SOL_SOCKET, SO_ERROR, &error, &len); + if ((ret != 0) || (error != 0)) + { + if (ret != 0) + error = errno; + gaim_proxy_connect_data_disconnect(connect_data, strerror(error)); + return; + } + + /* + * We want to call the "connected" callback eventually, but we + * don't want to call it before we return, just in case. + */ + gaim_timeout_add(10, clean_connect, connect_data); + } +} + +/** + * This is a utility function used by the HTTP, SOCKS4 and SOCKS5 + * connect functions. It writes data from a buffer to a socket. + * When all the data is written it sets up a watcher to read a + * response and call a specified function. + */ +static void +proxy_do_write(gpointer data, gint source, GaimInputCondition cond) +{ + GaimProxyConnectData *connect_data; + const guchar *request; + gsize request_len; + int ret; + + connect_data = data; + request = connect_data->write_buffer + connect_data->written_len; + request_len = connect_data->write_buf_len - connect_data->written_len; + + ret = write(connect_data->fd, request, request_len); + if (ret <= 0) + { + if (errno == EAGAIN) + /* No worries */ + return; + + /* Error! */ + gaim_proxy_connect_data_disconnect(connect_data, strerror(errno)); + return; + } + if (ret < request_len) { + connect_data->written_len += ret; + return; + } + + /* We're done writing data! Wait for a response. */ + g_free(connect_data->write_buffer); + connect_data->write_buffer = NULL; + gaim_input_remove(connect_data->inpa); + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_READ, connect_data->read_cb, connect_data); +} + +#define HTTP_GOODSTRING "HTTP/1.0 200" +#define HTTP_GOODSTRING2 "HTTP/1.1 200" + +/** + * We're using an HTTP proxy for a non-port 80 tunnel. Read the + * response to the CONNECT request. + */ +static void +http_canread(gpointer data, gint source, GaimInputCondition cond) +{ + int len, headers_len, status = 0; + gboolean error; + GaimProxyConnectData *connect_data = data; + guchar *p; + gsize max_read; + + if (connect_data->read_buffer == NULL) + { + connect_data->read_buf_len = 8192; + connect_data->read_buffer = g_malloc(connect_data->read_buf_len); + connect_data->read_len = 0; + } + + p = connect_data->read_buffer + connect_data->read_len; + max_read = connect_data->read_buf_len - connect_data->read_len - 1; + + len = read(connect_data->fd, p, max_read); + + if (len == 0) + { + gaim_proxy_connect_data_disconnect(connect_data, + _("Server closed the connection.")); + return; + } + + if (len < 0) + { + if (errno == EAGAIN) + /* No worries */ + return; + + /* Error! */ + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Lost connection with server:\n%s"), strerror(errno)); + return; + } + + connect_data->read_len += len; + p[len] = '\0'; + + p = (guchar *)g_strstr_len((const gchar *)connect_data->read_buffer, + connect_data->read_len, "\r\n\r\n"); + if (p != NULL) { + *p = '\0'; + headers_len = (p - connect_data->read_buffer) + 4; + } else if(len == max_read) + headers_len = len; + else + return; + + error = strncmp((const char *)connect_data->read_buffer, "HTTP/", 5) != 0; + if (!error) + { + int major; + p = connect_data->read_buffer + 5; + major = strtol((const char *)p, (char **)&p, 10); + error = (major == 0) || (*p != '.'); + if(!error) { + int minor; + p++; + minor = strtol((const char *)p, (char **)&p, 10); + error = (*p != ' '); + if(!error) { + p++; + status = strtol((const char *)p, (char **)&p, 10); + error = (*p != ' '); + } + } + } + + /* Read the contents */ + p = (guchar *)g_strrstr((const gchar *)connect_data->read_buffer, "Content-Length: "); + if (p != NULL) + { + gchar *tmp; + int len = 0; + char tmpc; + p += strlen("Content-Length: "); + tmp = strchr((const char *)p, '\r'); + if(tmp) + *tmp = '\0'; + len = atoi((const char *)p); + if(tmp) + *tmp = '\r'; + + /* Compensate for what has already been read */ + len -= connect_data->read_len - headers_len; + /* I'm assuming that we're doing this to prevent the server from + complaining / breaking since we don't read the whole page */ + while (len--) { + /* TODO: deal with EAGAIN (and other errors) better */ + if (read(connect_data->fd, &tmpc, 1) < 0 && errno != EAGAIN) + break; + } + } + + if (error) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Unable to parse response from HTTP proxy: %s\n"), + connect_data->read_buffer); + return; + } + else if (status != 200) + { + gaim_debug_error("proxy", + "Proxy server replied with:\n%s\n", + connect_data->read_buffer); + + if (status == 407 /* Proxy Auth */) + { + gchar *ntlm; + ntlm = g_strrstr((const gchar *)connect_data->read_buffer, + "Proxy-Authenticate: NTLM "); + if (ntlm != NULL) + { + /* Check for Type-2 */ + gchar *tmp = ntlm; + guint8 *nonce; + gchar *domain = (gchar*)gaim_proxy_info_get_username(connect_data->gpi); + gchar *username; + gchar *request; + gchar *response; + username = strchr(domain, '\\'); + if (username == NULL) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("HTTP proxy connection error %d"), status); + return; + } + *username = '\0'; + username++; + ntlm += strlen("Proxy-Authenticate: NTLM "); + while(*tmp != '\r' && *tmp != '\0') tmp++; + *tmp = '\0'; + nonce = gaim_ntlm_parse_type2(ntlm, NULL); + response = gaim_ntlm_gen_type3(username, + (gchar*) gaim_proxy_info_get_password(connect_data->gpi), + (gchar*) gaim_proxy_info_get_host(connect_data->gpi), + domain, nonce, NULL); + username--; + *username = '\\'; + request = g_strdup_printf( + "CONNECT %s:%d HTTP/1.1\r\n" + "Host: %s:%d\r\n" + "Proxy-Authorization: NTLM %s\r\n" + "Proxy-Connection: Keep-Alive\r\n\r\n", + connect_data->host, connect_data->port, connect_data->host, + connect_data->port, response); + g_free(response); + + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + connect_data->write_buffer = (guchar *)request; + connect_data->write_buf_len = strlen(request); + connect_data->written_len = 0; + connect_data->read_cb = http_canread; + + gaim_input_remove(connect_data->inpa); + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, proxy_do_write, connect_data); + proxy_do_write(connect_data, connect_data->fd, cond); + return; + } else if((ntlm = g_strrstr((const char *)connect_data->read_buffer, "Proxy-Authenticate: NTLM"))) { /* Empty message */ + gchar request[2048]; + gchar *domain = (gchar*) gaim_proxy_info_get_username(connect_data->gpi); + gchar *username; + int request_len; + username = strchr(domain, '\\'); + if (username == NULL) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("HTTP proxy connection error %d"), status); + return; + } + *username = '\0'; + + request_len = g_snprintf(request, sizeof(request), + "CONNECT %s:%d HTTP/1.1\r\n" + "Host: %s:%d\r\n", + connect_data->host, connect_data->port, + connect_data->host, connect_data->port); + + g_return_if_fail(request_len < sizeof(request)); + request_len += g_snprintf(request + request_len, + sizeof(request) - request_len, + "Proxy-Authorization: NTLM %s\r\n" + "Proxy-Connection: Keep-Alive\r\n\r\n", + gaim_ntlm_gen_type1( + (gchar*) gaim_proxy_info_get_host(connect_data->gpi), + domain)); + *username = '\\'; + + gaim_input_remove(connect_data->inpa); + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + connect_data->write_buffer = g_memdup(request, request_len); + connect_data->write_buf_len = request_len; + connect_data->written_len = 0; + + connect_data->read_cb = http_canread; + + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, proxy_do_write, connect_data); + + proxy_do_write(connect_data, connect_data->fd, cond); + return; + } else { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("HTTP proxy connection error %d"), status); + return; + } + } + if (status == 403) + { + /* Forbidden */ + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Access denied: HTTP proxy server forbids port %d tunneling."), + connect_data->port); + } else { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("HTTP proxy connection error %d"), status); + } + } else { + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + gaim_debug_info("proxy", "HTTP proxy connection established\n"); + gaim_proxy_connect_data_connected(connect_data); + return; + } +} + +static void +http_canwrite(gpointer data, gint source, GaimInputCondition cond) +{ + GString *request; + GaimProxyConnectData *connect_data; + socklen_t len; + int error = ETIMEDOUT; + int ret; + + gaim_debug_info("proxy", "Connected.\n"); + + connect_data = data; + + if (connect_data->inpa > 0) + { + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + } + + len = sizeof(error); + ret = getsockopt(connect_data->fd, SOL_SOCKET, SO_ERROR, &error, &len); + if ((ret != 0) || (error != 0)) + { + if (ret != 0) + error = errno; + gaim_proxy_connect_data_disconnect(connect_data, strerror(error)); + return; + } + + gaim_debug_info("proxy", "Using CONNECT tunneling for %s:%d\n", + connect_data->host, connect_data->port); + + request = g_string_sized_new(4096); + g_string_append_printf(request, + "CONNECT %s:%d HTTP/1.1\r\nHost: %s:%d\r\n", + connect_data->host, connect_data->port, + connect_data->host, connect_data->port); + + if (gaim_proxy_info_get_username(connect_data->gpi) != NULL) + { + char *t1, *t2; + + t1 = g_strdup_printf("%s:%s", + gaim_proxy_info_get_username(connect_data->gpi), + gaim_proxy_info_get_password(connect_data->gpi) ? + gaim_proxy_info_get_password(connect_data->gpi) : ""); + t2 = gaim_base64_encode((const guchar *)t1, strlen(t1)); + g_free(t1); + + g_string_append_printf(request, + "Proxy-Authorization: Basic %s\r\n" + "Proxy-Authorization: NTLM %s\r\n" + "Proxy-Connection: Keep-Alive\r\n", + t2, gaim_ntlm_gen_type1( + gaim_proxy_info_get_host(connect_data->gpi), "")); + g_free(t2); + } + + g_string_append(request, "\r\n"); + + connect_data->write_buf_len = request->len; + connect_data->write_buffer = (guchar *)g_string_free(request, FALSE); + connect_data->written_len = 0; + connect_data->read_cb = http_canread; + + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, proxy_do_write, connect_data); + proxy_do_write(connect_data, connect_data->fd, cond); +} + +static void +proxy_connect_http(GaimProxyConnectData *connect_data, struct sockaddr *addr, socklen_t addrlen) +{ + gaim_debug_info("proxy", + "Connecting to %s:%d via %s:%d using HTTP\n", + connect_data->host, connect_data->port, + (gaim_proxy_info_get_host(connect_data->gpi) ? gaim_proxy_info_get_host(connect_data->gpi) : "(null)"), + gaim_proxy_info_get_port(connect_data->gpi)); + + connect_data->fd = socket(addr->sa_family, SOCK_STREAM, 0); + if (connect_data->fd < 0) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Unable to create socket:\n%s"), strerror(errno)); + return; + } + + fcntl(connect_data->fd, F_SETFL, O_NONBLOCK); +#ifndef _WIN32 + fcntl(connect_data->fd, F_SETFD, FD_CLOEXEC); +#endif + + if (connect(connect_data->fd, addr, addrlen) != 0) + { + if ((errno == EINPROGRESS) || (errno == EINTR)) { + gaim_debug_info("proxy", "Connection in progress\n"); + + if (connect_data->port != 80) + { + /* we need to do CONNECT first */ + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, http_canwrite, connect_data); + } + else + { + /* + * If we're trying to connect to something running on + * port 80 then we assume the traffic using this + * connection is going to be HTTP traffic. If it's + * not then this will fail (uglily). But it's good + * to avoid using the CONNECT method because it's + * not always allowed. + */ + gaim_debug_info("proxy", "HTTP proxy connection established\n"); + gaim_proxy_connect_data_connected(connect_data); + } + } + else + { + gaim_proxy_connect_data_disconnect(connect_data, strerror(errno)); + } + } + else + { + gaim_debug_info("proxy", "Connected immediately.\n"); + + http_canwrite(connect_data, connect_data->fd, GAIM_INPUT_WRITE); + } +} + +static void +s4_canread(gpointer data, gint source, GaimInputCondition cond) +{ + GaimProxyConnectData *connect_data = data; + guchar *buf; + int len, max_read; + + /* This is really not going to block under normal circumstances, but to + * be correct, we deal with the unlikely scenario */ + + if (connect_data->read_buffer == NULL) { + connect_data->read_buf_len = 12; + connect_data->read_buffer = g_malloc(connect_data->read_buf_len); + connect_data->read_len = 0; + } + + buf = connect_data->read_buffer + connect_data->read_len; + max_read = connect_data->read_buf_len - connect_data->read_len; + + len = read(connect_data->fd, buf, max_read); + + if ((len < 0 && errno == EAGAIN) || (len > 0 && len + connect_data->read_len < 4)) + return; + else if (len + connect_data->read_len >= 4) { + if (connect_data->read_buffer[1] == 90) { + gaim_proxy_connect_data_connected(connect_data); + return; + } + } + + gaim_proxy_connect_data_disconnect(connect_data, strerror(errno)); +} + +static void +s4_canwrite(gpointer data, gint source, GaimInputCondition cond) +{ + unsigned char packet[9]; + struct hostent *hp; + GaimProxyConnectData *connect_data = data; + socklen_t len; + int error = ETIMEDOUT; + int ret; + + gaim_debug_info("socks4 proxy", "Connected.\n"); + + if (connect_data->inpa > 0) + { + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + } + + len = sizeof(error); + ret = getsockopt(connect_data->fd, SOL_SOCKET, SO_ERROR, &error, &len); + if ((ret != 0) || (error != 0)) + { + if (ret != 0) + error = errno; + gaim_proxy_connect_data_disconnect(connect_data, strerror(error)); + return; + } + + /* + * The socks4 spec doesn't include support for doing host name + * lookups by the proxy. Some socks4 servers do this via + * extensions to the protocol. Since we don't know if a + * server supports this, it would need to be implemented + * with an option, or some detection mechanism - in the + * meantime, stick with plain old SOCKS4. + */ + /* TODO: Use gaim_dnsquery_a() */ + hp = gethostbyname(connect_data->host); + if (hp == NULL) { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Error resolving %s"), connect_data->host); + return; + } + + packet[0] = 4; + packet[1] = 1; + packet[2] = connect_data->port >> 8; + packet[3] = connect_data->port & 0xff; + packet[4] = (unsigned char)(hp->h_addr_list[0])[0]; + packet[5] = (unsigned char)(hp->h_addr_list[0])[1]; + packet[6] = (unsigned char)(hp->h_addr_list[0])[2]; + packet[7] = (unsigned char)(hp->h_addr_list[0])[3]; + packet[8] = 0; + + connect_data->write_buffer = g_memdup(packet, sizeof(packet)); + connect_data->write_buf_len = sizeof(packet); + connect_data->written_len = 0; + connect_data->read_cb = s4_canread; + + connect_data->inpa = gaim_input_add(connect_data->fd, GAIM_INPUT_WRITE, proxy_do_write, connect_data); + + proxy_do_write(connect_data, connect_data->fd, cond); +} + +static void +proxy_connect_socks4(GaimProxyConnectData *connect_data, struct sockaddr *addr, socklen_t addrlen) +{ + gaim_debug_info("proxy", + "Connecting to %s:%d via %s:%d using SOCKS4\n", + connect_data->host, connect_data->port, + gaim_proxy_info_get_host(connect_data->gpi), + gaim_proxy_info_get_port(connect_data->gpi)); + + connect_data->fd = socket(addr->sa_family, SOCK_STREAM, 0); + if (connect_data->fd < 0) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Unable to create socket:\n%s"), strerror(errno)); + return; + } + + fcntl(connect_data->fd, F_SETFL, O_NONBLOCK); +#ifndef _WIN32 + fcntl(connect_data->fd, F_SETFD, FD_CLOEXEC); +#endif + + if (connect(connect_data->fd, addr, addrlen) != 0) + { + if ((errno == EINPROGRESS) || (errno == EINTR)) + { + gaim_debug_info("proxy", "Connection in progress.\n"); + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, s4_canwrite, connect_data); + } + else + { + gaim_proxy_connect_data_disconnect(connect_data, strerror(errno)); + } + } + else + { + gaim_debug_info("proxy", "Connected immediately.\n"); + + s4_canwrite(connect_data, connect_data->fd, GAIM_INPUT_WRITE); + } +} + +static void +s5_canread_again(gpointer data, gint source, GaimInputCondition cond) +{ + guchar *dest, *buf; + GaimProxyConnectData *connect_data = data; + int len; + + if (connect_data->read_buffer == NULL) { + connect_data->read_buf_len = 512; + connect_data->read_buffer = g_malloc(connect_data->read_buf_len); + connect_data->read_len = 0; + } + + dest = connect_data->read_buffer + connect_data->read_len; + buf = connect_data->read_buffer; + + gaim_debug_info("socks5 proxy", "Able to read again.\n"); + + len = read(connect_data->fd, dest, (connect_data->read_buf_len - connect_data->read_len)); + + if (len == 0) + { + gaim_proxy_connect_data_disconnect(connect_data, + _("Server closed the connection.")); + return; + } + + if (len < 0) + { + if (errno == EAGAIN) + /* No worries */ + return; + + /* Error! */ + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Lost connection with server:\n%s"), strerror(errno)); + return; + } + + connect_data->read_len += len; + + if(connect_data->read_len < 4) + return; + + if ((buf[0] != 0x05) || (buf[1] != 0x00)) { + if ((buf[0] == 0x05) && (buf[1] < 0x09)) { + gaim_debug_error("socks5 proxy", socks5errors[buf[1]]); + gaim_proxy_connect_data_disconnect(connect_data, + socks5errors[buf[1]]); + } else { + gaim_debug_error("socks5 proxy", "Bad data.\n"); + gaim_proxy_connect_data_disconnect(connect_data, + _("Received invalid data on connection with server.")); + } + return; + } + + /* Skip past BND.ADDR */ + switch(buf[3]) { + case 0x01: /* the address is a version-4 IP address, with a length of 4 octets */ + if(connect_data->read_len < 4 + 4) + return; + buf += 4 + 4; + break; + case 0x03: /* the address field contains a fully-qualified domain name. The first + octet of the address field contains the number of octets of name that + follow, there is no terminating NUL octet. */ + if(connect_data->read_len < 4 + 1) + return; + buf += 4 + 1; + if(connect_data->read_len < 4 + 1 + buf[0]) + return; + buf += buf[0]; + break; + case 0x04: /* the address is a version-6 IP address, with a length of 16 octets */ + if(connect_data->read_len < 4 + 16) + return; + buf += 4 + 16; + break; + } + + if(connect_data->read_len < (buf - connect_data->read_buffer) + 2) + return; + + /* Skip past BND.PORT */ + buf += 2; + + gaim_proxy_connect_data_connected(connect_data); +} + +static void +s5_sendconnect(gpointer data, int source) +{ + GaimProxyConnectData *connect_data = data; + int hlen = strlen(connect_data->host); + connect_data->write_buf_len = 5 + hlen + 2; + connect_data->write_buffer = g_malloc(connect_data->write_buf_len); + connect_data->written_len = 0; + + connect_data->write_buffer[0] = 0x05; + connect_data->write_buffer[1] = 0x01; /* CONNECT */ + connect_data->write_buffer[2] = 0x00; /* reserved */ + connect_data->write_buffer[3] = 0x03; /* address type -- host name */ + connect_data->write_buffer[4] = hlen; + memcpy(connect_data->write_buffer + 5, connect_data->host, hlen); + connect_data->write_buffer[5 + hlen] = connect_data->port >> 8; + connect_data->write_buffer[5 + hlen + 1] = connect_data->port & 0xff; + + connect_data->read_cb = s5_canread_again; + + connect_data->inpa = gaim_input_add(connect_data->fd, GAIM_INPUT_WRITE, proxy_do_write, connect_data); + proxy_do_write(connect_data, connect_data->fd, GAIM_INPUT_WRITE); +} + +static void +s5_readauth(gpointer data, gint source, GaimInputCondition cond) +{ + GaimProxyConnectData *connect_data = data; + int len; + + if (connect_data->read_buffer == NULL) { + connect_data->read_buf_len = 2; + connect_data->read_buffer = g_malloc(connect_data->read_buf_len); + connect_data->read_len = 0; + } + + gaim_debug_info("socks5 proxy", "Got auth response.\n"); + + len = read(connect_data->fd, connect_data->read_buffer + connect_data->read_len, + connect_data->read_buf_len - connect_data->read_len); + + if (len == 0) + { + gaim_proxy_connect_data_disconnect(connect_data, + _("Server closed the connection.")); + return; + } + + if (len < 0) + { + if (errno == EAGAIN) + /* No worries */ + return; + + /* Error! */ + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Lost connection with server:\n%s"), strerror(errno)); + return; + } + + connect_data->read_len += len; + if (connect_data->read_len < 2) + return; + + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + + if ((connect_data->read_buffer[0] != 0x01) || (connect_data->read_buffer[1] != 0x00)) { + gaim_proxy_connect_data_disconnect(connect_data, + _("Received invalid data on connection with server.")); + return; + } + + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + s5_sendconnect(connect_data, connect_data->fd); +} + +static void +hmacmd5_chap(const unsigned char * challenge, int challen, const char * passwd, unsigned char * response) +{ + GaimCipher *cipher; + GaimCipherContext *ctx; + int i; + unsigned char Kxoripad[65]; + unsigned char Kxoropad[65]; + int pwlen; + + cipher = gaim_ciphers_find_cipher("md5"); + ctx = gaim_cipher_context_new(cipher, NULL); + + memset(Kxoripad,0,sizeof(Kxoripad)); + memset(Kxoropad,0,sizeof(Kxoropad)); + + pwlen=strlen(passwd); + if (pwlen>64) { + gaim_cipher_context_append(ctx, (const guchar *)passwd, strlen(passwd)); + gaim_cipher_context_digest(ctx, sizeof(Kxoripad), Kxoripad, NULL); + pwlen=16; + } else { + memcpy(Kxoripad, passwd, pwlen); + } + memcpy(Kxoropad,Kxoripad,pwlen); + + for (i=0;i<64;i++) { + Kxoripad[i]^=0x36; + Kxoropad[i]^=0x5c; + } + + gaim_cipher_context_reset(ctx, NULL); + gaim_cipher_context_append(ctx, Kxoripad, 64); + gaim_cipher_context_append(ctx, challenge, challen); + gaim_cipher_context_digest(ctx, sizeof(Kxoripad), Kxoripad, NULL); + + gaim_cipher_context_reset(ctx, NULL); + gaim_cipher_context_append(ctx, Kxoropad, 64); + gaim_cipher_context_append(ctx, Kxoripad, 16); + gaim_cipher_context_digest(ctx, 16, response, NULL); + + gaim_cipher_context_destroy(ctx); +} + +static void +s5_readchap(gpointer data, gint source, GaimInputCondition cond) +{ + guchar *cmdbuf, *buf; + GaimProxyConnectData *connect_data = data; + int len, navas, currentav; + + gaim_debug(GAIM_DEBUG_INFO, "socks5 proxy", "Got CHAP response.\n"); + + if (connect_data->read_buffer == NULL) { + connect_data->read_buf_len = 20; + connect_data->read_buffer = g_malloc(connect_data->read_buf_len); + connect_data->read_len = 0; + } + + len = read(connect_data->fd, connect_data->read_buffer + connect_data->read_len, + connect_data->read_buf_len - connect_data->read_len); + + if (len == 0) + { + gaim_proxy_connect_data_disconnect(connect_data, + _("Server closed the connection.")); + return; + } + + if (len < 0) + { + if (errno == EAGAIN) + /* No worries */ + return; + + /* Error! */ + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Lost connection with server:\n%s"), strerror(errno)); + return; + } + + connect_data->read_len += len; + if (connect_data->read_len < 2) + return; + + cmdbuf = connect_data->read_buffer; + + if (*cmdbuf != 0x01) { + gaim_proxy_connect_data_disconnect(connect_data, + _("Received invalid data on connection with server.")); + return; + } + cmdbuf++; + + navas = *cmdbuf; + cmdbuf++; + + for (currentav = 0; currentav < navas; currentav++) { + if (connect_data->read_len - (cmdbuf - connect_data->read_buffer) < 2) + return; + if (connect_data->read_len - (cmdbuf - connect_data->read_buffer) < cmdbuf[1]) + return; + buf = cmdbuf + 2; + switch (cmdbuf[0]) { + case 0x00: + /* Did auth work? */ + if (buf[0] == 0x00) { + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + /* Success */ + s5_sendconnect(connect_data, connect_data->fd); + return; + } else { + /* Failure */ + gaim_debug_warning("proxy", + "socks5 CHAP authentication " + "failed. Disconnecting..."); + gaim_proxy_connect_data_disconnect(connect_data, + _("Authentication failed")); + return; + } + break; + case 0x03: + /* Server wants our credentials */ + + connect_data->write_buf_len = 16 + 4; + connect_data->write_buffer = g_malloc(connect_data->write_buf_len); + connect_data->written_len = 0; + + hmacmd5_chap(buf, cmdbuf[1], + gaim_proxy_info_get_password(connect_data->gpi), + connect_data->write_buffer + 4); + connect_data->write_buffer[0] = 0x01; + connect_data->write_buffer[1] = 0x01; + connect_data->write_buffer[2] = 0x04; + connect_data->write_buffer[3] = 0x10; + + gaim_input_remove(connect_data->inpa); + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + connect_data->read_cb = s5_readchap; + + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, proxy_do_write, connect_data); + + proxy_do_write(connect_data, connect_data->fd, GAIM_INPUT_WRITE); + break; + case 0x11: + /* Server wants to select an algorithm */ + if (buf[0] != 0x85) { + /* Only currently support HMAC-MD5 */ + gaim_debug_warning("proxy", + "Server tried to select an " + "algorithm that we did not advertise " + "as supporting. This is a violation " + "of the socks5 CHAP specification. " + "Disconnecting..."); + gaim_proxy_connect_data_disconnect(connect_data, + _("Received invalid data on connection with server.")); + return; + } + break; + } + cmdbuf = buf + cmdbuf[1]; + } + /* Fell through. We ran out of CHAP events to process, but haven't + * succeeded or failed authentication - there may be more to come. + * If this is the case, come straight back here. */ +} + +static void +s5_canread(gpointer data, gint source, GaimInputCondition cond) +{ + GaimProxyConnectData *connect_data = data; + int len; + + if (connect_data->read_buffer == NULL) { + connect_data->read_buf_len = 2; + connect_data->read_buffer = g_malloc(connect_data->read_buf_len); + connect_data->read_len = 0; + } + + gaim_debug_info("socks5 proxy", "Able to read.\n"); + + len = read(connect_data->fd, connect_data->read_buffer + connect_data->read_len, + connect_data->read_buf_len - connect_data->read_len); + + if (len == 0) + { + gaim_proxy_connect_data_disconnect(connect_data, + _("Server closed the connection.")); + return; + } + + if (len < 0) + { + if (errno == EAGAIN) + /* No worries */ + return; + + /* Error! */ + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Lost connection with server:\n%s"), strerror(errno)); + return; + } + + connect_data->read_len += len; + if (connect_data->read_len < 2) + return; + + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + + if ((connect_data->read_buffer[0] != 0x05) || (connect_data->read_buffer[1] == 0xff)) { + gaim_proxy_connect_data_disconnect(connect_data, + _("Received invalid data on connection with server.")); + return; + } + + if (connect_data->read_buffer[1] == 0x02) { + gsize i, j; + const char *u, *p; + + u = gaim_proxy_info_get_username(connect_data->gpi); + p = gaim_proxy_info_get_password(connect_data->gpi); + + i = (u == NULL) ? 0 : strlen(u); + j = (p == NULL) ? 0 : strlen(p); + + connect_data->write_buf_len = 1 + 1 + i + 1 + j; + connect_data->write_buffer = g_malloc(connect_data->write_buf_len); + connect_data->written_len = 0; + + connect_data->write_buffer[0] = 0x01; /* version 1 */ + connect_data->write_buffer[1] = i; + if (u != NULL) + memcpy(connect_data->write_buffer + 2, u, i); + connect_data->write_buffer[2 + i] = j; + if (p != NULL) + memcpy(connect_data->write_buffer + 2 + i + 1, p, j); + + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + connect_data->read_cb = s5_readauth; + + connect_data->inpa = gaim_input_add(connect_data->fd, GAIM_INPUT_WRITE, + proxy_do_write, connect_data); + + proxy_do_write(connect_data, connect_data->fd, GAIM_INPUT_WRITE); + + return; + } else if (connect_data->read_buffer[1] == 0x03) { + gsize userlen; + userlen = strlen(gaim_proxy_info_get_username(connect_data->gpi)); + + connect_data->write_buf_len = 7 + userlen; + connect_data->write_buffer = g_malloc(connect_data->write_buf_len); + connect_data->written_len = 0; + + connect_data->write_buffer[0] = 0x01; + connect_data->write_buffer[1] = 0x02; + connect_data->write_buffer[2] = 0x11; + connect_data->write_buffer[3] = 0x01; + connect_data->write_buffer[4] = 0x85; + connect_data->write_buffer[5] = 0x02; + connect_data->write_buffer[6] = userlen; + memcpy(connect_data->write_buffer + 7, + gaim_proxy_info_get_username(connect_data->gpi), userlen); + + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + connect_data->read_cb = s5_readchap; + + connect_data->inpa = gaim_input_add(connect_data->fd, GAIM_INPUT_WRITE, + proxy_do_write, connect_data); + + proxy_do_write(connect_data, connect_data->fd, GAIM_INPUT_WRITE); + + return; + } else { + g_free(connect_data->read_buffer); + connect_data->read_buffer = NULL; + + s5_sendconnect(connect_data, connect_data->fd); + } +} + +static void +s5_canwrite(gpointer data, gint source, GaimInputCondition cond) +{ + unsigned char buf[5]; + int i; + GaimProxyConnectData *connect_data = data; + socklen_t len; + int error = ETIMEDOUT; + int ret; + + gaim_debug_info("socks5 proxy", "Connected.\n"); + + if (connect_data->inpa > 0) + { + gaim_input_remove(connect_data->inpa); + connect_data->inpa = 0; + } + + len = sizeof(error); + ret = getsockopt(connect_data->fd, SOL_SOCKET, SO_ERROR, &error, &len); + if ((ret != 0) || (error != 0)) + { + if (ret != 0) + error = errno; + gaim_proxy_connect_data_disconnect(connect_data, strerror(error)); + return; + } + + i = 0; + buf[0] = 0x05; /* SOCKS version 5 */ + + if (gaim_proxy_info_get_username(connect_data->gpi) != NULL) { + buf[1] = 0x03; /* three methods */ + buf[2] = 0x00; /* no authentication */ + buf[3] = 0x03; /* CHAP authentication */ + buf[4] = 0x02; /* username/password authentication */ + i = 5; + } + else { + buf[1] = 0x01; + buf[2] = 0x00; + i = 3; + } + + connect_data->write_buf_len = i; + connect_data->write_buffer = g_malloc(connect_data->write_buf_len); + memcpy(connect_data->write_buffer, buf, i); + + connect_data->read_cb = s5_canread; + + connect_data->inpa = gaim_input_add(connect_data->fd, GAIM_INPUT_WRITE, proxy_do_write, connect_data); + proxy_do_write(connect_data, connect_data->fd, GAIM_INPUT_WRITE); +} + +static void +proxy_connect_socks5(GaimProxyConnectData *connect_data, struct sockaddr *addr, socklen_t addrlen) +{ + gaim_debug_info("proxy", + "Connecting to %s:%d via %s:%d using SOCKS5\n", + connect_data->host, connect_data->port, + gaim_proxy_info_get_host(connect_data->gpi), + gaim_proxy_info_get_port(connect_data->gpi)); + + connect_data->fd = socket(addr->sa_family, SOCK_STREAM, 0); + if (connect_data->fd < 0) + { + gaim_proxy_connect_data_disconnect_formatted(connect_data, + _("Unable to create socket:\n%s"), strerror(errno)); + return; + } + + fcntl(connect_data->fd, F_SETFL, O_NONBLOCK); +#ifndef _WIN32 + fcntl(connect_data->fd, F_SETFD, FD_CLOEXEC); +#endif + + if (connect(connect_data->fd, addr, addrlen) != 0) + { + if ((errno == EINPROGRESS) || (errno == EINTR)) + { + gaim_debug_info("socks5 proxy", "Connection in progress\n"); + connect_data->inpa = gaim_input_add(connect_data->fd, + GAIM_INPUT_WRITE, s5_canwrite, connect_data); + } + else + { + gaim_proxy_connect_data_disconnect(connect_data, strerror(errno)); + } + } + else + { + gaim_debug_info("proxy", "Connected immediately.\n"); + + s5_canwrite(connect_data, connect_data->fd, GAIM_INPUT_WRITE); + } +} + +/** + * This function attempts to connect to the next IP address in the list + * of IP addresses returned to us by gaim_dnsquery_a() and attemps + * to connect to each one. This is called after the hostname is + * resolved, and each time a connection attempt fails (assuming there + * is another IP address to try). + */ +static void try_connect(GaimProxyConnectData *connect_data) +{ + size_t addrlen; + struct sockaddr *addr; + char ipaddr[INET6_ADDRSTRLEN]; + + addrlen = GPOINTER_TO_INT(connect_data->hosts->data); + connect_data->hosts = g_slist_remove(connect_data->hosts, connect_data->hosts->data); + addr = connect_data->hosts->data; + connect_data->hosts = g_slist_remove(connect_data->hosts, connect_data->hosts->data); + + inet_ntop(addr->sa_family, &((struct sockaddr_in *)addr)->sin_addr, + ipaddr, sizeof(ipaddr)); + gaim_debug_info("proxy", "Attempting connection to %s\n", ipaddr); + + switch (gaim_proxy_info_get_type(connect_data->gpi)) { + case GAIM_PROXY_NONE: + proxy_connect_none(connect_data, addr, addrlen); + break; + + case GAIM_PROXY_HTTP: + proxy_connect_http(connect_data, addr, addrlen); + break; + + case GAIM_PROXY_SOCKS4: + proxy_connect_socks4(connect_data, addr, addrlen); + break; + + case GAIM_PROXY_SOCKS5: + proxy_connect_socks5(connect_data, addr, addrlen); + break; + + case GAIM_PROXY_USE_ENVVAR: + proxy_connect_http(connect_data, addr, addrlen); + break; + + default: + break; + } + + g_free(addr); +} + +static void +connection_host_resolved(GSList *hosts, gpointer data, + const char *error_message) +{ + GaimProxyConnectData *connect_data; + + connect_data = data; + connect_data->query_data = NULL; + + if (error_message != NULL) + { + gaim_proxy_connect_data_disconnect(connect_data, error_message); + return; + } + + if (hosts == NULL) + { + gaim_proxy_connect_data_disconnect(connect_data, _("Could not resolve host name")); + return; + } + + connect_data->hosts = hosts; + + try_connect(connect_data); +} + +GaimProxyInfo * +gaim_proxy_get_setup(GaimAccount *account) +{ + GaimProxyInfo *gpi = NULL; + const gchar *tmp; + + /* This is used as a fallback so we don't overwrite the selected proxy type */ + static GaimProxyInfo *tmp_none_proxy_info = NULL; + if (!tmp_none_proxy_info) { + tmp_none_proxy_info = gaim_proxy_info_new(); + gaim_proxy_info_set_type(tmp_none_proxy_info, GAIM_PROXY_NONE); + } + + if (account && gaim_account_get_proxy_info(account) != NULL) { + gpi = gaim_account_get_proxy_info(account); + if (gaim_proxy_info_get_type(gpi) == GAIM_PROXY_USE_GLOBAL) + gpi = NULL; + } + if (gpi == NULL) { + if (gaim_running_gnome()) + gpi = gaim_gnome_proxy_get_info(); + else + gpi = gaim_global_proxy_get_info(); + } + + if (gaim_proxy_info_get_type(gpi) == GAIM_PROXY_USE_ENVVAR) { +#ifdef _WIN32 + wgaim_check_for_proxy_changes(); +#endif + if ((tmp = g_getenv("HTTP_PROXY")) != NULL || + (tmp = g_getenv("http_proxy")) != NULL || + (tmp = g_getenv("HTTPPROXY")) != NULL) { + char *proxyhost, *proxyuser, *proxypasswd; + int proxyport; + + /* http_proxy-format: + * export http_proxy="http://user:passwd@your.proxy.server:port/" + */ + if(gaim_url_parse(tmp, &proxyhost, &proxyport, NULL, &proxyuser, &proxypasswd)) { + gaim_proxy_info_set_host(gpi, proxyhost); + g_free(proxyhost); + + gaim_proxy_info_set_username(gpi, proxyuser); + g_free(proxyuser); + + gaim_proxy_info_set_password(gpi, proxypasswd); + g_free(proxypasswd); + + /* only for backward compatibility */ + if (proxyport == 80 && + ((tmp = g_getenv("HTTP_PROXY_PORT")) != NULL || + (tmp = g_getenv("http_proxy_port")) != NULL || + (tmp = g_getenv("HTTPPROXYPORT")) != NULL)) + proxyport = atoi(tmp); + + gaim_proxy_info_set_port(gpi, proxyport); + + /* XXX: Do we want to skip this step if user/password were part of url? */ + if ((tmp = g_getenv("HTTP_PROXY_USER")) != NULL || + (tmp = g_getenv("http_proxy_user")) != NULL || + (tmp = g_getenv("HTTPPROXYUSER")) != NULL) + gaim_proxy_info_set_username(gpi, tmp); + + if ((tmp = g_getenv("HTTP_PROXY_PASS")) != NULL || + (tmp = g_getenv("http_proxy_pass")) != NULL || + (tmp = g_getenv("HTTPPROXYPASS")) != NULL) + gaim_proxy_info_set_password(gpi, tmp); + + } + } else { + /* no proxy environment variable found, don't use a proxy */ + gaim_debug_info("proxy", "No environment settings found, not using a proxy\n"); + gpi = tmp_none_proxy_info; + } + + } + + return gpi; +} + +GaimProxyConnectData * +gaim_proxy_connect(void *handle, GaimAccount *account, + const char *host, int port, + GaimProxyConnectFunction connect_cb, gpointer data) +{ + const char *connecthost = host; + int connectport = port; + GaimProxyConnectData *connect_data; + + g_return_val_if_fail(host != NULL, NULL); + g_return_val_if_fail(port > 0, NULL); + g_return_val_if_fail(connect_cb != NULL, NULL); + + connect_data = g_new0(GaimProxyConnectData, 1); + connect_data->fd = -1; + connect_data->handle = handle; + connect_data->connect_cb = connect_cb; + connect_data->data = data; + connect_data->host = g_strdup(host); + connect_data->port = port; + connect_data->gpi = gaim_proxy_get_setup(account); + + if ((gaim_proxy_info_get_type(connect_data->gpi) != GAIM_PROXY_NONE) && + (gaim_proxy_info_get_host(connect_data->gpi) == NULL || + gaim_proxy_info_get_port(connect_data->gpi) <= 0)) { + + gaim_notify_error(NULL, NULL, _("Invalid proxy settings"), _("Either the host name or port number specified for your given proxy type is invalid.")); + gaim_proxy_connect_data_destroy(connect_data); + return NULL; + } + + switch (gaim_proxy_info_get_type(connect_data->gpi)) + { + case GAIM_PROXY_NONE: + break; + + case GAIM_PROXY_HTTP: + case GAIM_PROXY_SOCKS4: + case GAIM_PROXY_SOCKS5: + case GAIM_PROXY_USE_ENVVAR: + connecthost = gaim_proxy_info_get_host(connect_data->gpi); + connectport = gaim_proxy_info_get_port(connect_data->gpi); + break; + + default: + gaim_proxy_connect_data_destroy(connect_data); + return NULL; + } + + connect_data->query_data = gaim_dnsquery_a(connecthost, + connectport, connection_host_resolved, connect_data); + if (connect_data->query_data == NULL) + { + gaim_proxy_connect_data_destroy(connect_data); + return NULL; + } + + handles = g_slist_prepend(handles, connect_data); + + return connect_data; +} + +/* + * Combine some of this code with gaim_proxy_connect() + */ +GaimProxyConnectData * +gaim_proxy_connect_socks5(void *handle, GaimProxyInfo *gpi, + const char *host, int port, + GaimProxyConnectFunction connect_cb, + gpointer data) +{ + GaimProxyConnectData *connect_data; + + g_return_val_if_fail(host != NULL, NULL); + g_return_val_if_fail(port >= 0, NULL); + g_return_val_if_fail(connect_cb != NULL, NULL); + + connect_data = g_new0(GaimProxyConnectData, 1); + connect_data->fd = -1; + connect_data->handle = handle; + connect_data->connect_cb = connect_cb; + connect_data->data = data; + connect_data->host = g_strdup(host); + connect_data->port = port; + connect_data->gpi = gpi; + + connect_data->query_data = + gaim_dnsquery_a(gaim_proxy_info_get_host(gpi), + gaim_proxy_info_get_port(gpi), + connection_host_resolved, connect_data); + if (connect_data->query_data == NULL) + { + gaim_proxy_connect_data_destroy(connect_data); + return NULL; + } + + handles = g_slist_prepend(handles, connect_data); + + return connect_data; +} + +void +gaim_proxy_connect_cancel(GaimProxyConnectData *connect_data) +{ + gaim_proxy_connect_data_disconnect(connect_data, NULL); + gaim_proxy_connect_data_destroy(connect_data); +} + +void +gaim_proxy_connect_cancel_with_handle(void *handle) +{ + GSList *l, *l_next; + + for (l = handles; l != NULL; l = l_next) { + GaimProxyConnectData *connect_data = l->data; + + l_next = l->next; + + if (connect_data->handle == handle) + gaim_proxy_connect_cancel(connect_data); + } +} + +static void +proxy_pref_cb(const char *name, GaimPrefType type, + gconstpointer value, gpointer data) +{ + GaimProxyInfo *info = gaim_global_proxy_get_info(); + + if (!strcmp(name, "/core/proxy/type")) { + int proxytype; + const char *type = value; + + if (!strcmp(type, "none")) + proxytype = GAIM_PROXY_NONE; + else if (!strcmp(type, "http")) + proxytype = GAIM_PROXY_HTTP; + else if (!strcmp(type, "socks4")) + proxytype = GAIM_PROXY_SOCKS4; + else if (!strcmp(type, "socks5")) + proxytype = GAIM_PROXY_SOCKS5; + else if (!strcmp(type, "envvar")) + proxytype = GAIM_PROXY_USE_ENVVAR; + else + proxytype = -1; + + gaim_proxy_info_set_type(info, proxytype); + } else if (!strcmp(name, "/core/proxy/host")) + gaim_proxy_info_set_host(info, value); + else if (!strcmp(name, "/core/proxy/port")) + gaim_proxy_info_set_port(info, GPOINTER_TO_INT(value)); + else if (!strcmp(name, "/core/proxy/username")) + gaim_proxy_info_set_username(info, value); + else if (!strcmp(name, "/core/proxy/password")) + gaim_proxy_info_set_password(info, value); +} + +void * +gaim_proxy_get_handle() +{ + static int handle; + + return &handle; +} + +void +gaim_proxy_init(void) +{ + void *handle; + + /* Initialize a default proxy info struct. */ + global_proxy_info = gaim_proxy_info_new(); + + /* Proxy */ + gaim_prefs_add_none("/core/proxy"); + gaim_prefs_add_string("/core/proxy/type", "none"); + gaim_prefs_add_string("/core/proxy/host", ""); + gaim_prefs_add_int("/core/proxy/port", 0); + gaim_prefs_add_string("/core/proxy/username", ""); + gaim_prefs_add_string("/core/proxy/password", ""); + + /* Setup callbacks for the preferences. */ + handle = gaim_proxy_get_handle(); + gaim_prefs_connect_callback(handle, "/core/proxy/type", proxy_pref_cb, + NULL); + gaim_prefs_connect_callback(handle, "/core/proxy/host", proxy_pref_cb, + NULL); + gaim_prefs_connect_callback(handle, "/core/proxy/port", proxy_pref_cb, + NULL); + gaim_prefs_connect_callback(handle, "/core/proxy/username", + proxy_pref_cb, NULL); + gaim_prefs_connect_callback(handle, "/core/proxy/password", + proxy_pref_cb, NULL); +} + +void +gaim_proxy_uninit(void) +{ + while (handles != NULL) + { + gaim_proxy_connect_data_disconnect(handles->data, NULL); + gaim_proxy_connect_data_destroy(handles->data); + } +} |