Exemple #1
0
_PUBLIC_ int swrap_bind(int s, const struct sockaddr *myaddr, socklen_t addrlen)
{
	int ret;
	struct sockaddr_un un_addr;
	struct socket_info *si = find_socket_info(s);

	if (!si) {
		return real_bind(s, myaddr, addrlen);
	}

	si->myname_len = addrlen;
	si->myname = sockaddr_dup(myaddr, addrlen);

	ret = sockaddr_convert_to_un(si, (const struct sockaddr *)myaddr, addrlen, &un_addr, 1, &si->bcast);
	if (ret == -1) return -1;

	unlink(un_addr.sun_path);

	ret = real_bind(s, (struct sockaddr *)&un_addr,
			sizeof(struct sockaddr_un));

	if (ret == 0) {
		si->bound = 1;
	}

	return ret;
}
Exemple #2
0
_PUBLIC_ ssize_t swrap_sendto(int s, const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen)
{
	struct sockaddr_un un_addr;
	int ret;
	struct socket_info *si = find_socket_info(s);
	int bcast = 0;

	if (!si) {
		return real_sendto(s, buf, len, flags, to, tolen);
	}

	if (si->bound == 0) {
		ret = swrap_auto_bind(si);
		if (ret == -1) return -1;
	}

	ret = sockaddr_convert_to_un(si, to, tolen, &un_addr, 0, &bcast);
	if (ret == -1) return -1;

	if (bcast) {
		struct stat st;
		unsigned int iface;
		unsigned int prt = ntohs(((const struct sockaddr_in *)to)->sin_port);
		char type;

		type = SOCKET_TYPE_CHAR_UDP;

		for(iface=0; iface <= MAX_WRAPPED_INTERFACES; iface++) {
			snprintf(un_addr.sun_path, sizeof(un_addr.sun_path), "%s/"SOCKET_FORMAT, 
				 socket_wrapper_dir(), type, iface, prt);
			if (stat(un_addr.sun_path, &st) != 0) continue;

			/* ignore the any errors in broadcast sends */
			real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr));
		}

		swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len);

		return len;
	}

	ret = real_sendto(s, buf, len, flags, (struct sockaddr *)&un_addr, sizeof(un_addr));

	/* to give better errors */
	if (ret == -1 && errno == ENOENT) {
		errno = EHOSTUNREACH;
	}

	if (ret == -1) {
		swrap_dump_packet(si, to, SWRAP_SENDTO, buf, len);
		swrap_dump_packet(si, to, SWRAP_SENDTO_UNREACH, buf, len);
	} else {
		swrap_dump_packet(si, to, SWRAP_SENDTO, buf, ret);
	}

	return ret;
}
Exemple #3
0
_PUBLIC_ int swrap_connect(int s, const struct sockaddr *serv_addr, socklen_t addrlen)
{
	int ret;
	struct sockaddr_un un_addr;
	struct socket_info *si = find_socket_info(s);

	if (!si) {
		return real_connect(s, serv_addr, addrlen);
	}

	if (si->bound == 0) {
		ret = swrap_auto_bind(si, serv_addr->sa_family);
		if (ret == -1) return -1;
	}

	if (si->family != serv_addr->sa_family) {
		errno = EINVAL;
		return -1;
	}

	ret = sockaddr_convert_to_un(si, (const struct sockaddr *)serv_addr, addrlen, &un_addr, 0, NULL);
	if (ret == -1) return -1;

	swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_SEND, NULL, 0);

	ret = real_connect(s, (struct sockaddr *)&un_addr, 
			   sizeof(struct sockaddr_un));

	/* to give better errors */
	if (ret == -1 && errno == ENOENT) {
		errno = EHOSTUNREACH;
	}

	if (ret == 0) {
		si->peername_len = addrlen;
		si->peername = sockaddr_dup(serv_addr, addrlen);
		si->connected = 1;

		swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_RECV, NULL, 0);
		swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_ACK, NULL, 0);
	} else {
		swrap_dump_packet(si, serv_addr, SWRAP_CONNECT_UNREACH, NULL, 0);
	}

	return ret;
}