http://cvs.openssl.org/chngview?cn=19053 made me wonder if bind() and

connect() are as finicky as sendto() when it comes to socket address
length. As it turned out they are, therefore the fix. Note that you
can't reproduce the problem on Linux, it was failing on Solaris,
FreeBSD, most likely on more...

crypto/bio/b_sock.c

@@ -606,7 +606,7 @@ int BIO_get_accept_socket(char *host, int bind_mode)
 		struct sockaddr_in6 sa_in6;
 #endif
 	} server,client;
-	int s=INVALID_SOCKET,cs;
+	int s=INVALID_SOCKET,cs,addrlen;
 	unsigned char ip[4];
 	unsigned short port;
 	char *str=NULL,*e;
@@ -677,8 +677,10 @@ int BIO_get_accept_socket(char *host, int bind_mode)
 
 	if ((*p_getaddrinfo.f)(h,p,&hint,&res)) break;
 
-	memcpy(&server, res->ai_addr,
-		res->ai_addrlen<=sizeof(server)?res->ai_addrlen:sizeof(server));
+	addrlen = res->ai_addrlen<=sizeof(server) ?
+			res->ai_addrlen :
+			sizeof(server);
+	memcpy(&server, res->ai_addr, addrlen);
 
 	(*p_freeaddrinfo.f)(res);
 	goto again;
@@ -690,6 +692,7 @@ int BIO_get_accept_socket(char *host, int bind_mode)
 	memset((char *)&server,0,sizeof(server));
 	server.sa_in.sin_family=AF_INET;
 	server.sa_in.sin_port=htons(port);
+	addrlen = sizeof(server.sa_in);
 
 	if (h == NULL || strcmp(h,"*") == 0)
 		server.sa_in.sin_addr.s_addr=INADDR_ANY;
@@ -723,7 +726,7 @@ again:
 		bind_mode=BIO_BIND_NORMAL;
 		}
 #endif
-	if (bind(s,&server.sa,sizeof(server)) == -1)
+	if (bind(s,&server.sa,addrlen) == -1)
 		{
 #ifdef SO_REUSEADDR
 		err_num=get_last_socket_error();
@@ -751,7 +754,7 @@ again:
 			if (cs != INVALID_SOCKET)
 				{
 				int ii;
-				ii=connect(cs,&client.sa,sizeof(client));
+				ii=connect(cs,&client.sa,addrlen);
 				closesocket(cs);
 				if (ii == INVALID_SOCKET)
 					{