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just kidding before, had to break svn at least once today 

SVN revision: 65935
This commit is contained in:
Mike Blumenkrantz 2011-12-06 03:41:16 +00:00
parent 0099b08234
commit db16af76ee
1 changed files with 469 additions and 0 deletions
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469
legacy/ecore/src/lib/ecore_con/ecore_con_socks.c Normal file
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#ifdef HAVE_NETINET_TCP_H
# include <netinet/tcp.h>
#endif
#ifdef HAVE_NET_IF_H
# include <net/if.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_SYS_UN_H
# include <sys/un.h>
#endif
#ifdef HAVE_WS2TCPIP_H
# include <ws2tcpip.h>
#endif
#ifdef HAVE_EVIL
# include <Evil.h>
#endif
#include "Ecore.h"
#include "ecore_private.h"
#include "Ecore_Con.h"
#include "ecore_con_private.h"
Eina_List *ecore_con_socks_proxies = NULL;
static Ecore_Con_Socks *
_ecore_con_socks_find(unsigned char version, const char *ip, int port, const char *username)
{
Eina_List *l;
Ecore_Con_Socks *ecs;
if (!ecore_con_socks_proxies) return NULL;
EINA_LIST_FOREACH(ecore_con_socks_proxies, l, ecs)
{
if (ecs->version != version) continue;
if (strcmp(ecs->ip, ip)) continue;
if ((port != -1) && (port != ecs->port)) continue;
if (username && strcmp(ecs->username, username)) continue;
return ecs;
}
return NULL;
}
static void
_ecore_con_socks_free(Ecore_Con_Socks *ecs)
{
ECORE_CON_SOCKS_CAST_ELSE(ecs) return;
if (_ecore_con_proxy_once == ecs) _ecore_con_proxy_once = NULL;
if (_ecore_con_proxy_global == ecs) _ecore_con_proxy_global = NULL;
eina_stringshare_del(ecs->ip);
eina_stringshare_del(ecs->username);
free(ecs);
}
/////////////////////////////////////////////////////////////////////////////////////
void
ecore_con_socks_shutdown(void)
{
Ecore_Con_Socks *ecs;
EINA_LIST_FREE(ecore_con_socks_proxies, ecs)
_ecore_con_socks_free(ecs);
_ecore_con_proxy_once = NULL;
_ecore_con_proxy_global = NULL;
}
void
ecore_con_socks_read(Ecore_Con_Server *svr, unsigned char *buf, int num)
{
const unsigned char *data;
ECORE_CON_SOCKS_CAST_ELSE(svr->ecs) return;
if (svr->ecs_state != ECORE_CON_SOCKS_STATE_READ) return;
if (v4)
{
DBG("SOCKS: %d bytes", num);
if (num < 8)
{
if (!svr->ecs_recvbuf) svr->ecs_recvbuf = eina_binbuf_new();
if (!svr->ecs_recvbuf) goto error;
eina_binbuf_append_length(svr->ecs_recvbuf, buf, num);
/* the slowest connection on earth */
if (eina_binbuf_length_get(svr->ecs_recvbuf) != 8) return;
data = eina_binbuf_string_get(svr->ecs_recvbuf);
}
else if (num > 8) goto error;
else
data = buf;
/* http://ufasoft.com/doc/socks4_protocol.htm */
if (data[0]) goto error;
switch (data[1])
{
case 90:
/* success! */
break;
case 91:
ecore_con_event_server_error(svr, "proxy request rejected or failed");
goto error;
case 92:
ecore_con_event_server_error(svr, "proxying SOCKS server could not perform authentication");
goto error;
case 93:
ecore_con_event_server_error(svr, "proxy request authentication rejected");
goto error;
default:
ecore_con_event_server_error(svr, "garbage data from proxy");
goto error;
}
if (svr->ecs->bind)
{
unsigned int nport;
char naddr[IF_NAMESIZE];
memcpy(&nport, &data[2], 2);
svr->proxyport = ntohl(nport);
if (!inet_ntop(AF_INET, &data[4], naddr, sizeof(naddr))) goto error;
svr->proxyip = eina_stringshare_add(naddr);
ecore_con_event_proxy_bind(svr);
}
svr->ecs_state = ECORE_CON_SOCKS_STATE_DONE;
INF("PROXY STATE++");
if (svr->ecs_recvbuf) eina_binbuf_free(svr->ecs_recvbuf);
svr->ecs_recvbuf = NULL;
ecore_con_event_server_add(svr);
}
return;
error:
_ecore_con_server_kill(svr);
}
Eina_Bool
ecore_con_socks_svr_init(Ecore_Con_Server *svr)
{
unsigned char *sbuf;
ECORE_CON_SOCKS_CAST_ELSE(svr->ecs) return EINA_FALSE;
if (!svr->ip) return EINA_FALSE;
if (svr->ecs_buf) return EINA_FALSE;
if (svr->handshaking && svr->ssl_state) return EINA_FALSE;
if (svr->ecs_state != ECORE_CON_SOCKS_STATE_INIT) return EINA_FALSE;
ecore_main_fd_handler_active_set(svr->fd_handler, ECORE_FD_WRITE);
if (v4)
{
size_t addrlen, ulen = 1;
addrlen = svr->ecs->lookup ? strlen(svr->name) + 1: 0;
if (svr->ecs->username) ulen += strlen(svr->ecs->username);
sbuf = alloca(sizeof(char) * (8 + ulen + addrlen));
/* http://en.wikipedia.org/wiki/SOCKS */
sbuf[0] = 4;
sbuf[1] = v4->bind ? 2 : 1;
sbuf[2] = svr->port >> 8;
sbuf[3] = svr->port & 0xff;
if (addrlen)
{
sbuf[4] = sbuf[5] = sbuf[6] = 0;
sbuf[7] = 1;
}
else
memcpy(sbuf + 4, svr->ecs_addr, 4);
if (svr->ecs->username)
memcpy(sbuf + 8, svr->ecs->username, ulen);
else
sbuf[8] = 0;
if (addrlen) memcpy(sbuf + 8 + ulen, svr->name, addrlen);
svr->ecs_buf = eina_binbuf_new();
eina_binbuf_append_length(svr->ecs_buf, sbuf, 8 + ulen + addrlen);
}
return EINA_TRUE;
}
void
ecore_con_socks_dns_cb(const char *canonname __UNUSED__, const char *ip, struct sockaddr *addr, int addrlen, Ecore_Con_Server *svr)
{
svr->ip = eina_stringshare_add(ip);
svr->ecs_addrlen = addrlen;
svr->ecs_state++;
if (addr->sa_family == AF_INET)
memcpy(svr->ecs_addr, &((struct sockaddr_in *)addr)->sin_addr.s_addr, 4);
#ifdef HAVE_IPV6
else
memcpy(svr->ecs_addr, &((struct sockaddr_in6 *)addr)->sin6_addr.s6_addr, addrlen);
#endif
ecore_con_socks_svr_init(svr);
}
void
ecore_con_socks_init(void)
{
const char *socks;
char *u, *h, *p, *l;
char buf[64];
int port, lookup = 0;
Ecore_Con_Socks *ecs;
unsigned char addr[sizeof(struct in_addr)];
/* ECORE_CON_SOCKS_V4=user@host:port:[1|0] */
socks = getenv("ECORE_CON_SOCKS_V4");
if ((!socks) || (!socks[0]) || (strlen(socks) > 64)) return;
strncpy(buf, socks, sizeof(buf));
h = strchr(buf, '@');
u = NULL;
/* username */
if (h && (h - buf > 0)) *h++ = 0, u = buf;
else h = buf;
/* host ip; I ain't resolvin shit here */
p = strchr(h, ':');
if (!p) return;
*p++ = 0;
if (!inet_pton(AF_INET, h, addr)) return;
errno = 0;
port = strtol(p, &l, 10);
if (errno || (port < 0) || (port > 65535)) return;
if (l && (l[0] == ':'))
lookup = (l[1] == '1');
ecs = ecore_con_socks4_remote_add(h, port, u);
if (!ecs) return;
ecore_con_socks4_lookup_set(ecs, lookup);
ecore_con_socks_apply_always(ecs);
INF("Added global proxy server %s%s%s:%d - DNS lookup %s",
u ?: "", u ? "@" : "", h, port, lookup ? "ENABLED" : "DISABLED");
}
/////////////////////////////////////////////////////////////////////////////////////
/**
* @defgroup Ecore_Con_Socks_Group Ecore Connection SOCKS functions
* @{
*/
/**
* Add a SOCKS v4 proxy to the proxy list
*
* Use this to create (or return, if previously added) a SOCKS proxy
* object which can be used by any ecore_con servers.
* @param ip The ip address of the proxy (NOT DOMAIN NAME. IP ADDRESS.)
* @param port The port to connect to on the proxy
* @param username The username to use for the proxy (OPTIONAL)
* @return An allocated proxy object, or NULL on failure
* @note This object NEVER needs to be explicitly freed.
* @since 1.2
*/
EAPI Ecore_Con_Socks *
ecore_con_socks4_remote_add(const char *ip, int port, const char *username)
{
Ecore_Con_Socks *ecs;
if ((!ip) || (!ip[0]) || (port < 0) || (port > 65535)) return NULL;
ecs = _ecore_con_socks_find(4, ip, port, username);
if (ecs) return ecs;
ecs = calloc(1, sizeof(Ecore_Con_Socks_v4));
if (!ecs) return NULL;
ecs->version = 4;
ecs->ip = eina_stringshare_add(ip);
ecs->port = port;
ecs->username = eina_stringshare_add(username);
ecore_con_socks_proxies = eina_list_append(ecore_con_socks_proxies, ecs);
return ecs;
}
/**
* Set DNS lookup mode on an existing SOCKS v4 proxy
*
* According to RFC, SOCKS v4 does not require that a proxy perform
* its own DNS lookups for addresses. SOCKS v4a specifies the protocol
* for this. If you want to enable remote DNS lookup and are sure that your
* proxy supports it, use this function.
* @param ecs The proxy object
* @param enable If true, the proxy will perform the dns lookup
* @note By default, this setting is DISABLED.
*/
EAPI void
ecore_con_socks4_lookup_set(Ecore_Con_Socks *ecs, Eina_Bool enable)
{
ECORE_CON_SOCKS_CAST_ELSE(ecs) return;
v4->lookup = !!enable;
}
/**
* Get DNS lookup mode on an existing SOCKS v4 proxy
*
* According to RFC, SOCKS v4 does not require that a proxy perform
* its own DNS lookups for addresses. SOCKS v4a specifies the protocol
* for this. This function returns whether lookups are enabled on a proxy object.
* @param ecs The proxy object
* @return If true, the proxy will perform the dns lookup
* @note By default, this setting is DISABLED.
*/
EAPI Eina_Bool
ecore_con_socks4_lookup_get(Ecore_Con_Socks *ecs)
{
ECORE_CON_SOCKS_CAST_ELSE(ecs) return EINA_FALSE;
return v4 ? v4->lookup : EINA_FALSE;
}
/**
* Find a SOCKS v4 proxy in the proxy list
*
* Use this to determine if a SOCKS proxy was previously added by checking
* the proxy list against the parameters given.
* @param ip The ip address of the proxy (NOT DOMAIN NAME. IP ADDRESS.)
* @param port The port to connect to on the proxy, or -1 to match the first proxy with @p ip
* @param username The username used for the proxy (OPTIONAL)
* @return true only if a proxy exists matching the given params
* @note This function matches slightly more loosely than ecore_con_socks4_remote_add(), and
* ecore_con_socks4_remote_add() should be used to return the actual object.
* @since 1.2
*/
EAPI Eina_Bool
ecore_con_socks4_remote_exists(const char *ip, int port, const char *username)
{
if ((!ip) || (!ip[0]) || (port < -1) || (port > 65535) || (username && (!username[0])))
return EINA_FALSE;
return !!_ecore_con_socks_find(4, ip, port, username);
}
/**
* Remove a SOCKS v4 proxy from the proxy list and delete it
*
* Use this to remove a SOCKS proxy from the proxy list by checking
* the list against the parameters given. The proxy will then be deleted.
* @param ip The ip address of the proxy (NOT DOMAIN NAME. IP ADDRESS.)
* @param port The port to connect to on the proxy, or -1 to match the first proxy with @p ip
* @param username The username used for the proxy (OPTIONAL)
* @note This function matches in the same way as ecore_con_socks4_remote_exists().
* @warning Be aware that deleting a proxy which is being used WILL ruin your life.
* @since 1.2
*/
EAPI void
ecore_con_socks4_remote_del(const char *ip, int port, const char *username)
{
Ecore_Con_Socks_v4 *v4;
if ((!ip) || (!ip[0]) || (port < -1) || (port > 65535) || (username && (!username[0]))) return;
if (!ecore_con_socks_proxies) return;
v4 = (Ecore_Con_Socks_v4*)_ecore_con_socks_find(4, ip, port, username);
if (!v4) return;
ecore_con_socks_proxies = eina_list_remove(ecore_con_socks_proxies, v4);
_ecore_con_socks_free((Ecore_Con_Socks*)v4);
}
/**
* Enable bind mode on a SOCKS proxy
*
* Use this function to enable binding a remote port for use with a remote server.
* For more information, see http://ufasoft.com/doc/socks4_protocol.htm
* @param ecs The proxy object
* @param is_bind If true, the connection established will be a port binding
* @warning Be aware that changing the operation mode of an active proxy may result in undefined behavior
* @since 1.2
*/
EAPI void
ecore_con_socks_bind_set(Ecore_Con_Socks *ecs, Eina_Bool is_bind)
{
EINA_SAFETY_ON_NULL_RETURN(ecs);
ecs->bind = !!is_bind;
}
/**
* Return bind mode of a SOCKS proxy
*
* Use this function to return bind mode of a proxy (binding a remote port for use with a remote server).
* For more information, see http://ufasoft.com/doc/socks4_protocol.htm
* @param ecs The proxy object
* @return If true, the connection established will be a port binding
* @since 1.2
*/
EAPI Eina_Bool
ecore_con_socks_bind_get(Ecore_Con_Socks *ecs)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(ecs, EINA_FALSE);
return ecs->bind;
}
EAPI unsigned int
ecore_con_socks_version_get(Ecore_Con_Socks *ecs)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(ecs, 0);
return ecs->version;
}
/**
* Remove a SOCKS v4 proxy from the proxy list and delete it
*
* Use this to remove a SOCKS proxy from the proxy list by directly deleting the object given.
* @param ecs The proxy object to delete
* @warning Be aware that deleting a proxy which is being used WILL ruin your life.
* @since 1.2
*/
EAPI void
ecore_con_socks_remote_del(Ecore_Con_Socks *ecs)
{
EINA_SAFETY_ON_NULL_RETURN(ecs);
if (!ecore_con_socks_proxies) return;
ecore_con_socks_proxies = eina_list_remove(ecore_con_socks_proxies, ecs);
_ecore_con_socks_free(ecs);
}
/**
* Set a proxy object to be used with the next server created with ecore_con_server_connect()
*
* This function sets a proxy for the next ecore_con connection. After the next server is created,
* the proxy will NEVER be applied again unless explicitly enabled.
* @param ecs The proxy object
* @see ecore_con_socks_apply_always()
* @since 1.2
*/
EAPI void
ecore_con_socks_apply_once(Ecore_Con_Socks *ecs)
{
_ecore_con_proxy_once = ecs;
}
/**
* Set a proxy object to be used with all servers created with ecore_con_server_connect()
*
* This function sets a proxy for all ecore_con connections. It will always be used.
* @param ecs The proxy object
* @see ecore_con_socks_apply_once()
* @since 1.2
* @note ecore-con supports setting this through environment variables like so:
* ECORE_CON_SOCKS_V4=[user@]server:port:lookup
* user is the OPTIONAL string that would be passed to the proxy as the username
* server is the IP_ADDRESS of the proxy server
* port is the port to connect to on the proxy server
* lookup is 1 if the proxy should perform all DNS lookups, otherwise 0 or omitted
*/
EAPI void
ecore_con_socks_apply_always(Ecore_Con_Socks *ecs)
{
_ecore_con_proxy_global = ecs;
}
/** @} */