Function doconnect

src/common.c:650–721

#endif

int doconnect(struct clientparam * param){
 SASIZETYPE size;


 if (*SAFAMILY(&param->sincr) == *SAFAMILY(&param->req) && !memcmp(SAADDR(&param->sincr), SAADDR(&param->req), SAADDRLEN(&param->req)) &&
	*SAPORT(&param->sincr) == *SAPORT(&param->req)) return 519;

 if (param->operation == ADMIN || param->operation == DNSRESOLVE || param->operation == BIND || param->operation == UDPASSOC)
	return 0;
 if (param->remsock != INVALID_SOCKET){
	size = sizeof(param->sinsr);
	if(so._getpeername(param->remsock, (struct sockaddr *)&param->sinsr, &size)==-1) {return (15);}
 }
 else {
	struct linger lg = {1,conf.timeouts[SINGLEBYTE_S]};

	if(SAISNULL(&param->sinsr)){
		if(SAISNULL(&param->req)) {
			return 100;
		}
		*SAFAMILY(&param->sinsr) = *SAFAMILY(&param->req);
		memcpy(SAADDR(&param->sinsr), SAADDR(&param->req), SAADDRLEN(&param->req)); 
	}
	if(!*SAPORT(&param->sinsr))*SAPORT(&param->sinsr) = *SAPORT(&param->req);
	if ((param->remsock=so._socket(SASOCK(&param->sinsr), SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {return (11);}
	so._setsockopt(param->remsock, SOL_SOCKET, SO_LINGER, (char *)&lg, sizeof(lg));
#ifdef REUSE
	{
		int opt;

#ifdef SO_REUSEADDR
		opt = 1;
		so._setsockopt(param->remsock, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, sizeof(int));
#endif
#ifdef SO_REUSEPORT
		opt = 1;
		so._setsockopt(param->remsock, SOL_SOCKET, SO_REUSEPORT, (unsigned char *)&opt, sizeof(int));
#endif
	}
#endif

	if(SAISNULL(&param->sinsl)){
#ifndef NOIPV6
		if(*SAFAMILY(&param->sinsr) == AF_INET6) param->sinsl = param->srv->extsa6;
		else
#endif
			param->sinsl = param->srv->extsa;
	}
	*SAPORT(&param->sinsl) = 0;
	if(so._bind(param->remsock, (struct sockaddr*)&param->sinsl, SASIZE(&param->sinsl))==-1) {
		return 12;
	}
	
	if(param->operation >= 256 || (param->operation & CONNECT)){
#ifdef _WIN32
		unsigned long ul = 1;
#endif
		if(so._connect(param->remsock,(struct sockaddr *)&param->sinsr,SASIZE(&param->sinsr))) {