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-rw-r--r--protocols/proxy.c672
1 files changed, 672 insertions, 0 deletions
diff --git a/protocols/proxy.c b/protocols/proxy.c
new file mode 100644
index 00000000..b0196e12
--- /dev/null
+++ b/protocols/proxy.c
@@ -0,0 +1,672 @@
+/*
+ * gaim
+ *
+ * Copyright (C) 1998-1999, Mark Spencer <markster@marko.net>
+ * Copyright (C) 2002-2004, Wilmer van der Gaast, Jelmer Vernooij
+ *
+ * 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 */
+
+#define BITLBEE_CORE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#ifndef _WIN32
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#else
+#include "sock.h"
+#define ETIMEDOUT WSAETIMEDOUT
+#define EINPROGRESS WSAEINPROGRESS
+#endif
+#include <fcntl.h>
+#include <errno.h>
+#include "nogaim.h"
+#include "proxy.h"
+
+#define GAIM_READ_COND (G_IO_IN | G_IO_HUP | G_IO_ERR)
+#define GAIM_WRITE_COND (G_IO_OUT | G_IO_HUP | G_IO_ERR | G_IO_NVAL)
+#define GAIM_ERR_COND (G_IO_HUP | G_IO_ERR | G_IO_NVAL)
+
+/*FIXME*
+ #ifndef _WIN32
+ if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
+ closesocket(fd);
+ g_free(phb);
+ return -1;
+ }
+ fcntl(fd, F_SETFL, 0);
+#endif*/
+
+char proxyhost[128] = "";
+int proxyport = 0;
+int proxytype = PROXY_NONE;
+char proxyuser[128] = "";
+char proxypass[128] = "";
+
+struct PHB {
+ GaimInputFunction func, proxy_func;
+ gpointer data, proxy_data;
+ char *host;
+ int port;
+ int fd;
+ gint inpa;
+};
+
+typedef struct _GaimIOClosure {
+ GaimInputFunction function;
+ guint result;
+ gpointer data;
+} GaimIOClosure;
+
+
+
+static struct sockaddr_in *gaim_gethostbyname(char *host, int port)
+{
+ static struct sockaddr_in sin;
+
+ if (!inet_aton(host, &sin.sin_addr)) {
+ struct hostent *hp;
+ if (!(hp = gethostbyname(host))) {
+ return NULL;
+ }
+ memset(&sin, 0, sizeof(struct sockaddr_in));
+ memcpy(&sin.sin_addr.s_addr, hp->h_addr, hp->h_length);
+ sin.sin_family = hp->h_addrtype;
+ } else
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(port);
+
+ return &sin;
+}
+
+static void gaim_io_destroy(gpointer data)
+{
+ g_free(data);
+}
+
+#ifdef PROXYPROFILER
+struct proxyprofiler
+{
+ GaimInputFunction function;
+ gpointer data;
+
+ int count;
+
+ struct proxyprofiler *next;
+} *pp = NULL;
+
+void proxyprofiler_dump()
+{
+ struct proxyprofiler *l;
+ char s[128];
+ FILE *fp;
+
+ sprintf( s, "proxyprofiler.%d", (int) getpid() );
+ fp = fopen( s, "w" );
+
+ fprintf( fp, "%-18s %-18s %10s\n", "Function", "Data", "Count" );
+ for( l = pp; l; l = l->next )
+ fprintf( fp, "0x%-16x 0x%-16x %10d\n", (int) l->function, (int) l->data, l->count );
+
+ fclose( fp );
+}
+#endif
+
+static gboolean gaim_io_invoke(GIOChannel *source, GIOCondition condition, gpointer data)
+{
+ GaimIOClosure *closure = data;
+ GaimInputCondition gaim_cond = 0;
+
+#ifdef PROXYPROFILER
+ struct proxyprofiler *l;
+
+ for( l = pp; l; l = l->next )
+ {
+ if( closure->function == l->function && closure->data == l->data )
+ break;
+ }
+ if( l )
+ {
+ l->count ++;
+ }
+ else
+ {
+ l = g_new0( struct proxyprofiler, 1 );
+ l->function = closure->function;
+ l->data = closure->data;
+ l->count = 1;
+
+ l->next = pp;
+ pp = l;
+ }
+#endif
+
+ count_io_event(source, "proxy");
+
+ if (condition & GAIM_READ_COND)
+ gaim_cond |= GAIM_INPUT_READ;
+ if (condition & GAIM_WRITE_COND)
+ gaim_cond |= GAIM_INPUT_WRITE;
+// if (condition & GAIM_ERR_COND)
+// fprintf( stderr, "ERROR! fd=%d\n", g_io_channel_unix_get_fd( source ) );
+
+ closure->function(closure->data, g_io_channel_unix_get_fd(source), gaim_cond);
+
+ return TRUE;
+}
+
+static void no_one_calls(gpointer data, gint source, GaimInputCondition cond)
+{
+ struct PHB *phb = data;
+ unsigned int len;
+ int error = ETIMEDOUT;
+ len = sizeof(error);
+
+#ifndef _WIN32
+ if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
+ closesocket(source);
+ gaim_input_remove(phb->inpa);
+ if( phb->proxy_func )
+ phb->proxy_func(phb->proxy_data, -1, GAIM_INPUT_READ);
+ else {
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb);
+ }
+ return;
+ }
+ fcntl(source, F_SETFL, 0);
+#endif
+ gaim_input_remove(phb->inpa);
+ if( phb->proxy_func )
+ phb->proxy_func(phb->proxy_data, source, GAIM_INPUT_READ);
+ else {
+ phb->func(phb->data, source, GAIM_INPUT_READ);
+ g_free(phb);
+ }
+}
+
+static int proxy_connect_none(char *host, unsigned short port, struct PHB *phb)
+{
+ struct sockaddr_in *sin;
+ int fd = -1;
+
+ if (!(sin = gaim_gethostbyname(host, port))) {
+ g_free(phb);
+ return -1;
+ }
+
+ if ((fd = socket(sin->sin_family, SOCK_STREAM, 0)) < 0) {
+ g_free(phb);
+ return -1;
+ }
+
+ sock_make_nonblocking(fd);
+
+ if (connect(fd, (struct sockaddr *)sin, sizeof(*sin)) < 0) {
+ if (sockerr_again()) {
+ phb->inpa = gaim_input_add(fd, GAIM_INPUT_WRITE, no_one_calls, phb);
+ phb->fd = fd;
+ } else {
+ closesocket(fd);
+ g_free(phb);
+ return -1;
+ }
+ }
+
+ return fd;
+}
+
+
+/* Connecting to HTTP proxies */
+
+#define HTTP_GOODSTRING "HTTP/1.0 200 Connection established"
+#define HTTP_GOODSTRING2 "HTTP/1.1 200 Connection established"
+
+static void http_canread(gpointer data, gint source, GaimInputCondition cond)
+{
+ int nlc = 0;
+ int pos = 0;
+ struct PHB *phb = data;
+ char inputline[8192];
+
+ gaim_input_remove(phb->inpa);
+
+ while ((pos < sizeof(inputline)-1) && (nlc != 2) && (read(source, &inputline[pos++], 1) == 1)) {
+ if (inputline[pos - 1] == '\n')
+ nlc++;
+ else if (inputline[pos - 1] != '\r')
+ nlc = 0;
+ }
+ inputline[pos] = '\0';
+
+ if ((memcmp(HTTP_GOODSTRING, inputline, strlen(HTTP_GOODSTRING)) == 0) ||
+ (memcmp(HTTP_GOODSTRING2, inputline, strlen(HTTP_GOODSTRING2)) == 0)) {
+ phb->func(phb->data, source, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+}
+
+static void http_canwrite(gpointer data, gint source, GaimInputCondition cond)
+{
+ char cmd[384];
+ struct PHB *phb = data;
+ unsigned int len;
+ int error = ETIMEDOUT;
+ if (phb->inpa > 0)
+ gaim_input_remove(phb->inpa);
+ len = sizeof(error);
+ if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+#ifdef F_SETFL
+ fcntl(source, F_SETFL, 0);
+#endif
+
+ g_snprintf(cmd, sizeof(cmd), "CONNECT %s:%d HTTP/1.1\r\nHost: %s:%d\r\n", phb->host, phb->port,
+ phb->host, phb->port);
+ if (send(source, cmd, strlen(cmd), 0) < 0) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ if (proxyuser && *proxyuser) {
+ char *t1, *t2;
+ t1 = g_strdup_printf("%s:%s", proxyuser, proxypass);
+ t2 = tobase64(t1);
+ g_free(t1);
+ g_snprintf(cmd, sizeof(cmd), "Proxy-Authorization: Basic %s\r\n", t2);
+ g_free(t2);
+ if (send(source, cmd, strlen(cmd), 0) < 0) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+ }
+
+ g_snprintf(cmd, sizeof(cmd), "\r\n");
+ if (send(source, cmd, strlen(cmd), 0) < 0) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ phb->inpa = gaim_input_add(source, GAIM_INPUT_READ, http_canread, phb);
+}
+
+static int proxy_connect_http(char *host, unsigned short port, struct PHB *phb)
+{
+ phb->host = g_strdup(host);
+ phb->port = port;
+ phb->proxy_func = http_canwrite;
+ phb->proxy_data = phb;
+
+ return( proxy_connect_none( proxyhost, proxyport, phb ) );
+}
+
+
+/* Connecting to SOCKS4 proxies */
+
+static void s4_canread(gpointer data, gint source, GaimInputCondition cond)
+{
+ unsigned char packet[12];
+ struct PHB *phb = data;
+
+ gaim_input_remove(phb->inpa);
+
+ memset(packet, 0, sizeof(packet));
+ if (read(source, packet, 9) >= 4 && packet[1] == 90) {
+ phb->func(phb->data, source, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+}
+
+static void s4_canwrite(gpointer data, gint source, GaimInputCondition cond)
+{
+ unsigned char packet[12];
+ struct hostent *hp;
+ struct PHB *phb = data;
+ unsigned int len;
+ int error = ETIMEDOUT;
+ if (phb->inpa > 0)
+ gaim_input_remove(phb->inpa);
+ len = sizeof(error);
+ if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+#ifdef F_SETFL
+ fcntl(source, F_SETFL, 0);
+#endif
+
+ /* XXX does socks4 not support host name lookups by the proxy? */
+ if (!(hp = gethostbyname(phb->host))) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ packet[0] = 4;
+ packet[1] = 1;
+ packet[2] = phb->port >> 8;
+ packet[3] = phb->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;
+ if (write(source, packet, 9) != 9) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ phb->inpa = gaim_input_add(source, GAIM_INPUT_READ, s4_canread, phb);
+}
+
+static int proxy_connect_socks4(char *host, unsigned short port, struct PHB *phb)
+{
+ phb->host = g_strdup(host);
+ phb->port = port;
+ phb->proxy_func = s4_canwrite;
+ phb->proxy_data = phb;
+
+ return( proxy_connect_none( proxyhost, proxyport, phb ) );
+}
+
+
+/* Connecting to SOCKS5 proxies */
+
+static void s5_canread_again(gpointer data, gint source, GaimInputCondition cond)
+{
+ unsigned char buf[512];
+ struct PHB *phb = data;
+
+ gaim_input_remove(phb->inpa);
+
+ if (read(source, buf, 10) < 10) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+ if ((buf[0] != 0x05) || (buf[1] != 0x00)) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ phb->func(phb->data, source, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+}
+
+static void s5_sendconnect(gpointer data, gint source)
+{
+ unsigned char buf[512];
+ struct PHB *phb = data;
+ int hlen = strlen(phb->host);
+
+ buf[0] = 0x05;
+ buf[1] = 0x01; /* CONNECT */
+ buf[2] = 0x00; /* reserved */
+ buf[3] = 0x03; /* address type -- host name */
+ buf[4] = hlen;
+ memcpy(buf + 5, phb->host, hlen);
+ buf[5 + strlen(phb->host)] = phb->port >> 8;
+ buf[5 + strlen(phb->host) + 1] = phb->port & 0xff;
+
+ if (write(source, buf, (5 + strlen(phb->host) + 2)) < (5 + strlen(phb->host) + 2)) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ phb->inpa = gaim_input_add(source, GAIM_INPUT_READ, s5_canread_again, phb);
+}
+
+static void s5_readauth(gpointer data, gint source, GaimInputCondition cond)
+{
+ unsigned char buf[512];
+ struct PHB *phb = data;
+
+ gaim_input_remove(phb->inpa);
+
+ if (read(source, buf, 2) < 2) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ if ((buf[0] != 0x01) || (buf[1] != 0x00)) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ s5_sendconnect(phb, source);
+}
+
+static void s5_canread(gpointer data, gint source, GaimInputCondition cond)
+{
+ unsigned char buf[512];
+ struct PHB *phb = data;
+
+ gaim_input_remove(phb->inpa);
+
+ if (read(source, buf, 2) < 2) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ if ((buf[0] != 0x05) || (buf[1] == 0xff)) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ if (buf[1] == 0x02) {
+ unsigned int i = strlen(proxyuser), j = strlen(proxypass);
+ buf[0] = 0x01; /* version 1 */
+ buf[1] = i;
+ memcpy(buf + 2, proxyuser, i);
+ buf[2 + i] = j;
+ memcpy(buf + 2 + i + 1, proxypass, j);
+ if (write(source, buf, 3 + i + j) < 3 + i + j) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ phb->inpa = gaim_input_add(source, GAIM_INPUT_READ, s5_readauth, phb);
+ } else {
+ s5_sendconnect(phb, source);
+ }
+}
+
+static void s5_canwrite(gpointer data, gint source, GaimInputCondition cond)
+{
+ unsigned char buf[512];
+ int i;
+ struct PHB *phb = data;
+ unsigned int len;
+ int error = ETIMEDOUT;
+ if (phb->inpa > 0)
+ gaim_input_remove(phb->inpa);
+ len = sizeof(error);
+ if (getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+#ifdef F_SETFL
+ fcntl(source, F_SETFL, 0);
+#endif
+
+ i = 0;
+ buf[0] = 0x05; /* SOCKS version 5 */
+ if (proxyuser[0]) {
+ buf[1] = 0x02; /* two methods */
+ buf[2] = 0x00; /* no authentication */
+ buf[3] = 0x02; /* username/password authentication */
+ i = 4;
+ } else {
+ buf[1] = 0x01;
+ buf[2] = 0x00;
+ i = 3;
+ }
+
+ if (write(source, buf, i) < i) {
+ close(source);
+ phb->func(phb->data, -1, GAIM_INPUT_READ);
+ g_free(phb->host);
+ g_free(phb);
+ return;
+ }
+
+ phb->inpa = gaim_input_add(source, GAIM_INPUT_READ, s5_canread, phb);
+}
+
+static int proxy_connect_socks5(char *host, unsigned short port, struct PHB *phb)
+{
+ phb->host = g_strdup(host);
+ phb->port = port;
+ phb->proxy_func = s5_canwrite;
+ phb->proxy_data = phb;
+
+ return( proxy_connect_none( proxyhost, proxyport, phb ) );
+}
+
+
+/* Export functions */
+
+gint gaim_input_add(gint source, GaimInputCondition condition, GaimInputFunction function, gpointer data)
+{
+ GaimIOClosure *closure = g_new0(GaimIOClosure, 1);
+ GIOChannel *channel;
+ GIOCondition cond = 0;
+
+ closure->function = function;
+ closure->data = data;
+
+ if (condition & GAIM_INPUT_READ)
+ cond |= GAIM_READ_COND;
+ if (condition & GAIM_INPUT_WRITE)
+ cond |= GAIM_WRITE_COND;
+
+ channel = g_io_channel_unix_new(source);
+ closure->result = g_io_add_watch_full(channel, G_PRIORITY_DEFAULT, cond,
+ gaim_io_invoke, closure, gaim_io_destroy);
+
+ g_io_channel_unref(channel);
+ return closure->result;
+}
+
+void gaim_input_remove(gint tag)
+{
+ if (tag > 0)
+ g_source_remove(tag);
+}
+
+int proxy_connect(char *host, int port, GaimInputFunction func, gpointer data)
+{
+ struct PHB *phb;
+
+ if (!host || !port || (port == -1) || !func || strlen(host) > 128) {
+ return -1;
+ }
+
+ phb = g_new0(struct PHB, 1);
+ phb->func = func;
+ phb->data = data;
+
+#ifndef _WIN32
+ sethostent(1);
+#endif
+
+ if ((proxytype == PROXY_NONE) || !proxyhost || !proxyhost[0] || !proxyport || (proxyport == -1))
+ return proxy_connect_none(host, port, phb);
+ else if (proxytype == PROXY_HTTP)
+ return proxy_connect_http(host, port, phb);
+ else if (proxytype == PROXY_SOCKS4)
+ return proxy_connect_socks4(host, port, phb);
+ else if (proxytype == PROXY_SOCKS5)
+ return proxy_connect_socks5(host, port, phb);
+
+ if (phb->host) g_free(phb);
+ g_free(phb);
+ return -1;
+}
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