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Support request filters for SOCKS, support broken BIND request from some clients

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This commit is contained in:
Vladimir Dubrovin 2023-07-12 15:55:50 +03:00
parent 8b57982a09
commit dc7e098e6b
1 changed files with 27 additions and 2 deletions
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29
src/socks.c
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@ -132,7 +132,8 @@ void * sockschild(struct clientparam* param) {
buf[i] = (unsigned char)res;
}
buf[i] = 0;
if(!getip46(param->srv->family, buf, (struct sockaddr *) &param->req)) RETURN(100);
if(command != 1 && param->srv->family != 6 && (!strcmp((char *)buf, "0.0.0.0") || !strcmp((char *)buf, "0"))) param->req = param->srv->extsa;
else if(!getip46(param->srv->family, buf, (struct sockaddr *) &param->req)) RETURN(100);
param->sinsr = param->req;
break;
default:
@ -203,7 +204,24 @@ void * sockschild(struct clientparam* param) {
RETURN(res);
}
#ifndef WITHMAIN
if(param->nreqfilters && buf){
int reqbufsize = BUFSIZE, reqsize, action;
sprintf((char *)buf, "%s ", commands[command]);
if(param->hostname){
sprintf((char *)buf + strlen((char *)buf), "%.265s", param->hostname);
}
else
myinet_ntop(*SAFAMILY(&param->req), SAADDR(&param->req), (char *)buf + strlen((char *)buf), 64);
sprintf((char *)buf+strlen((char *)buf), ":%hu", ntohs(*SAPORT(&param->req)));
reqsize = strlen((char *)buf);
action = handlereqfilters(param, &buf, &reqbufsize, 0, &reqsize);
if(action == HANDLED){
RETURN(0);
}
if(action != PASS) RETURN(517);
}
#endif
if(command > 1) {
if(so._bind(param->remsock,(struct sockaddr *)&param->sinsl,SASIZE(&param->sinsl))) {
@ -233,6 +251,11 @@ fflush(stderr);
}
param->res = 0;
CLEANRET:
if(param->clisock != INVALID_SOCKET){
@ -274,6 +297,8 @@ fflush(stderr);
socksend(param->clisock, buf, 8, conf.timeouts[STRING_S]);
}
if (param->npredatfilters){
int action;