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info.c
资源名称：socks5.zip [点击查看]
上传用户：sddyfurun
上传日期：2007-01-04
资源大小：525k
文件大小：7k
源码类别：
代理服务器
开发平台：
Unix_Linux
- /* Copyright (c) 1995,1996,1997 NEC Corporation. All rights reserved. */
- /* */
- /* The redistribution, use and modification in source or binary forms of */
- /* this software is subject to the conditions set forth in the copyright */
- /* document ("Copyright") included with this distribution. */
- /*
- * $Id: info.c,v 1.42.4.3 1998/07/19 22:47:08 wlu Exp $
- */
- /* This file has the code for dealing with the global protocol variables. */
- #include "socks5p.h"
- #include "threads.h"
- #include "daemon.h"
- #include "validate.h"
- #include "info.h"
- #include "log.h"
- /* Return a malloc'd string representing the closest thing you can get to a */
- /* Hostname for ia... */
- /* */
- /* Arguments: ia, the address whose name we are looking up... */
- void GetName(char *name, S5NetAddr *addr) {
- const char *res = NULL, *eres;
- const struct hostent *hp = NULL;
- memset(name, 0, S5_HOSTNAME_SIZE);
- if (addr->sa.sa_family == AF_S5NAME) {
- strncpy(name, addr->sn.sn_name, MIN(strlen(addr->sn.sn_name)+1, S5_HOSTNAME_SIZE));
- if (strlen(addr->sn.sn_name)+1 > S5_HOSTNAME_SIZE) name[S5_HOSTNAME_SIZE-1] = ' ';
- return;
- }
- MUTEX_LOCK(env_mutex);
- eres = getenv("SOCKS5_REVERSEMAP");
- MUTEX_UNLOCK(env_mutex);
- if (eres) {
- MUTEX_LOCK(gh_mutex);
- hp = gethostbyaddr((char *)&addr->sin.sin_addr, sizeof(struct in_addr), AF_INET);
- if (!hp) { MUTEX_UNLOCK(gh_mutex); }
- else res = hp->h_name;
- }
- if (res != NULL || (res = lsAddr2Ascii(addr)) != NULL) {
- strncpy(name, res, MIN(strlen(res)+1, S5_HOSTNAME_SIZE));
- if (strlen(res)+1 > S5_HOSTNAME_SIZE) name[S5_HOSTNAME_SIZE-1] = ' ';
- }
- if (!hp) return;
- MUTEX_UNLOCK(gh_mutex);
- }
- /* Returns a malloc'd string representing the closest then you can get to a */
- /* Service name for port. */
- /* */
- /* Arguments: port, the port whose service name we are looking up... */
- void GetServ(char *name, u_short port, char *proto) {
- struct servent *srv;
- char *tmp;
- memset(name, 0, S5_APPNAME_SIZE);
- MUTEX_LOCK(env_mutex);
- tmp = getenv("SOCKS5_SERVICENAME");
- MUTEX_UNLOCK(env_mutex);
- MUTEX_LOCK(gs_mutex);
- if (tmp && (srv = getservbyport(port, proto))) {
- strncpy(name, srv->s_name, MIN(strlen(srv->s_name)+1, S5_APPNAME_SIZE));
- if (strlen(srv->s_name)+1 > S5_APPNAME_SIZE) name[S5_APPNAME_SIZE-1] = ' ';
- } else {
- sprintf(name, "%d", (int)ntohs(port));
- }
- MUTEX_UNLOCK(gs_mutex);
- }
- /* Resolves any hosts/services which were passed by name instead of by */
- /* address, if there are any...Also it finds out which socks server to use */
- /* and logs an error if it cannot pass the name to the next one (i.e. the */
- /* next one is not a socks5 serve). */
- /* */
- /* Globals Used/Affected: dstsin -- filled in with destination address... */
- /* scksin -- filled in with server address... */
- int ResolveNames(S5LinkInfo *pri) {
- S5NetAddr tmp;
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Starting");
- pri->retName[0] = ' ';
- memset((char *)&pri->retAddr, 0, sizeof(pri->retAddr));
- pri->retAddr.sa.sa_family = AF_INET;
- pri->retAddr.sin.sin_addr.s_addr = INVALIDADDR;
- /* If the destination address is of type S5NAME, copy the name to */
- /* pri->retAddr, resolve the name and copy the reslved address to both */
- /* pri->dstAddr and pri->retAddr... */
- /* */
- /* If the destination address is of type INET, copy the address to */
- /* pri->retAddr, reverse map the name and copy the mapped name to */
- /* pri->retName... */
- if (pri->dstAddr.sa.sa_family == AF_S5NAME) {
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve names: Unresolved host name: %s", pri->dstAddr.sn.sn_name);
- strncpy(pri->retName, pri->dstAddr.sn.sn_name, MIN(strlen(pri->dstAddr.sn.sn_name) + 1, S5_HOSTNAME_SIZE));
- if (strlen(pri->dstAddr.sn.sn_name) + 1 > S5_HOSTNAME_SIZE) pri->retName[S5_HOSTNAME_SIZE-1] = ' ';
- if (!lsName2Addr(pri->dstAddr.sn.sn_name, &tmp)) {
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: host name: %s is %s", pri->dstAddr.sn.sn_name, lsAddr2Ascii(&tmp));
- lsAddrSetPort(&tmp, lsAddr2Port(&pri->dstAddr));
- lsAddrCopy(&pri->dstAddr, &tmp, lsAddrSize(&tmp));
- lsAddrCopy(&pri->retAddr, &pri->dstAddr, lsAddrSize(&pri->dstAddr));
- } else {
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Unresolved host name: %s still unresolved", pri->dstAddr.sn.sn_name);
- lsAddrSetPort(&pri->retAddr, lsAddr2Port(&pri->dstAddr));
- }
- GetName(pri->dstName, &pri->dstAddr);
- } else {
- if (pri->dstAddr.sin.sin_addr.s_addr != INADDR_ANY &&
- !(pri->dstAddr.sin.sin_addr.s_addr & inet_addr("255.255.255.0"))) {
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Wrong host: %s", lsAddr2Ascii(&pri->dstAddr));
- return -1;
- }
- lsAddrCopy(&pri->retAddr, &pri->dstAddr, lsAddrSize(&pri->dstAddr));
- GetName(pri->dstName, &pri->dstAddr);
- if (inet_addr(pri->dstName) == INVALIDADDR) strcpy(pri->retName, pri->dstName);
- }
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Looking up service name");
- GetServ(pri->dstServ, lsAddr2Port(&pri->dstAddr), (pri->peerCommand == SOCKS_UDP)?"udp":"tcp");
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Looking up next proxy");
- GetProxy(&pri->dstAddr, pri->dstName, (pri->peerCommand == SOCKS_UDP)?"udp":"tcp", pri->altSckAddrs, &pri->nAltSckAddrs, &pri->nextVersion);
- if (pri->nextVersion) {
- lsAddrCopy(&pri->sckAddr, &pri->altSckAddrs[0], lsAddrSize(&pri->altSckAddrs[0]));
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Looking up next proxy's name");
- GetName(pri->sckName, &pri->sckAddr);
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: Next Proxy: (%s:%d)", ADDRANDPORT(&pri->sckAddr));
- } else {
- memset(&pri->sckAddr, 0, sizeof(pri->sckAddr));
- S5LogUpdate(S5LogDefaultHandle, S5_LOG_DEBUG(10), 0, "Resolve Names: No Next Proxy");
- }
- return 0;
- }
