/*- * addr_strings - helper function to get host and service names * @ap: the BIO_ADDR that has the input info * @numeric: 0 if actual names should be returned, 1 if the numeric * representation should be returned. * @hostname: a pointer to a pointer to a memory area to store the * host name or numeric representation. Unused if NULL. * @service: a pointer to a pointer to a memory area to store the * service name or numeric representation. Unused if NULL. * * The return value is 0 on failure, with the error code in the error * stack, and 1 on success. */ static int addr_strings(const BIO_ADDR *ap, int numeric, char **hostname, char **service) { if (BIO_sock_init() != 1) return 0; if (1) { #ifdef AI_PASSIVE int ret = 0; char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; int flags = 0; if (numeric) flags |= NI_NUMERICHOST | NI_NUMERICSERV; if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), BIO_ADDR_sockaddr_size(ap), host, sizeof(host), serv, sizeof(serv), flags)) != 0) { # ifdef EAI_SYSTEM if (ret == EAI_SYSTEM) { SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); } else # endif { BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); ERR_add_error_data(1, gai_strerror(ret)); } return 0; } /* VMS getnameinfo() has a bug, it doesn't fill in serv, which * leaves it with whatever garbage that happens to be there. * However, we initialise serv with the empty string (serv[0] * is therefore NUL), so it gets real easy to detect when things * didn't go the way one might expect. */ if (serv[0] == '\0') { BIO_snprintf(serv, sizeof(serv), "%d", ntohs(BIO_ADDR_rawport(ap))); } if (hostname) *hostname = OPENSSL_strdup(host); if (service) *service = OPENSSL_strdup(serv); } else { #endif if (hostname) *hostname = OPENSSL_strdup(inet_ntoa(ap->s_in.sin_addr)); if (service) { char serv[6]; /* port is 16 bits => max 5 decimal digits */ BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->s_in.sin_port)); *service = OPENSSL_strdup(serv); } } return 1; }
/*- * addr_strings - helper function to get host and service names * @ap: the BIO_ADDR that has the input info * @numeric: 0 if actual names should be returned, 1 if the numeric * representation should be returned. * @hostname: a pointer to a pointer to a memory area to store the * host name or numeric representation. Unused if NULL. * @service: a pointer to a pointer to a memory area to store the * service name or numeric representation. Unused if NULL. * * The return value is 0 on failure, with the error code in the error * stack, and 1 on success. */ static int addr_strings(const BIO_ADDR *ap, int numeric, char **hostname, char **service) { if (BIO_sock_init() != 1) return 0; if (1) { #ifdef AI_PASSIVE int ret = 0; char host[NI_MAXHOST], serv[NI_MAXSERV]; int flags = 0; if (numeric) flags |= NI_NUMERICHOST | NI_NUMERICSERV; if ((ret = getnameinfo(BIO_ADDR_sockaddr(ap), BIO_ADDR_sockaddr_size(ap), host, sizeof(host), serv, sizeof(serv), flags)) != 0) { # ifdef EAI_SYSTEM if (ret == EAI_SYSTEM) { SYSerr(SYS_F_GETNAMEINFO, get_last_socket_error()); BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); } else # endif { BIOerr(BIO_F_ADDR_STRINGS, ERR_R_SYS_LIB); ERR_add_error_data(1, gai_strerror(ret)); } return 0; } if (hostname) *hostname = OPENSSL_strdup(host); if (service) *service = OPENSSL_strdup(serv); } else { #endif if (hostname) *hostname = OPENSSL_strdup(inet_ntoa(ap->sin.sin_addr)); if (service) { char serv[6]; /* port is 16 bits => max 5 decimal digits */ BIO_snprintf(serv, sizeof(serv), "%d", ntohs(ap->sin.sin_port)); *service = OPENSSL_strdup(serv); } } return 1; }
/*- * BIO_connect - connect to an address * @sock: the socket to connect with * @addr: the address to connect to * @options: BIO socket options * * Connects to the address using the given socket and options. * * Options can be a combination of the following: * - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages. * - BIO_SOCK_NONBLOCK: Make the socket non-blocking. * - BIO_SOCK_NODELAY: don't delay small messages. * * options holds BIO socket options that can be used * You should call this for every address returned by BIO_lookup * until the connection is successful. * * Returns 1 on success or 0 on failure. On failure errno is set * and an error status is added to the OpenSSL error stack. */ int BIO_connect(int sock, const BIO_ADDR *addr, int options) { const int on = 1; if (sock == -1) { BIOerr(BIO_F_BIO_CONNECT, BIO_R_INVALID_SOCKET); return 0; } if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0)) return 0; if (options & BIO_SOCK_KEEPALIVE) { if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (const void *)&on, sizeof(on)) != 0) { SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_CONNECT, BIO_R_UNABLE_TO_KEEPALIVE); return 0; } } if (options & BIO_SOCK_NODELAY) { if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (const void *)&on, sizeof(on)) != 0) { SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_CONNECT, BIO_R_UNABLE_TO_NODELAY); return 0; } } if (connect(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) == -1) { if (!BIO_sock_should_retry(-1)) { SYSerr(SYS_F_CONNECT, get_last_socket_error()); BIOerr(BIO_F_BIO_CONNECT, BIO_R_CONNECT_ERROR); } return 0; } return 1; }
/*- * BIO_listen - Creates a listen socket * @sock: the socket to listen with * @addr: local address to bind to * @options: BIO socket options * * Binds to the address using the given socket and options, then * starts listening for incoming connections. * * Options can be a combination of the following: * - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages. * - BIO_SOCK_NONBLOCK: Make the socket non-blocking. * - BIO_SOCK_NODELAY: don't delay small messages. * - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination * for a recently closed port. * - BIO_SOCK_V6_ONLY: When creating an IPv6 socket, make it listen only * for IPv6 addresses and not IPv4 addresses mapped to IPv6. * * It's recommended that you set up both an IPv6 and IPv4 listen socket, and * then check both for new clients that connect to it. You want to set up * the socket as non-blocking in that case since else it could hang. * * Not all operating systems support IPv4 addresses on an IPv6 socket, and for * others it's an option. If you pass the BIO_LISTEN_V6_ONLY it will try to * create the IPv6 sockets to only listen for IPv6 connection. * * It could be that the first BIO_listen() call will listen to all the IPv6 * and IPv4 addresses and that then trying to bind to the IPv4 address will * fail. We can't tell the difference between already listening ourself to * it and someone else listening to it when failing and errno is EADDRINUSE, so * it's recommended to not give an error in that case if the first call was * successful. * * When restarting the program it could be that the port is still in use. If * you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway. * It's recommended that you use this. */ int BIO_listen(int sock, const BIO_ADDR *addr, int options) { int on = 1; int socktype; socklen_t socktype_len = sizeof(socktype); if (sock == -1) { BIOerr(BIO_F_BIO_LISTEN, BIO_R_INVALID_SOCKET); return 0; } if (getsockopt(sock, SOL_SOCKET, SO_TYPE, (void *)&socktype, &socktype_len) != 0 || socktype_len != sizeof(socktype)) { SYSerr(SYS_F_GETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_GETTING_SOCKTYPE); return 0; } if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0)) return 0; # ifndef OPENSSL_SYS_WINDOWS /* SO_REUSEADDR has different behavior on Windows than on * other operating systems, don't set it there. */ if (options & BIO_SOCK_REUSEADDR) { if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const void *)&on, sizeof(on)) != 0) { SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_REUSEADDR); return 0; } } # endif if (options & BIO_SOCK_KEEPALIVE) { if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (const void *)&on, sizeof(on)) != 0) { SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_KEEPALIVE); return 0; } } if (options & BIO_SOCK_NODELAY) { if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (const void *)&on, sizeof(on)) != 0) { SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_NODELAY); return 0; } } # ifdef IPV6_V6ONLY if ((options & BIO_SOCK_V6_ONLY) && BIO_ADDR_family(addr) == AF_INET6) { if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (const void *)&on, sizeof(on)) != 0) { SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_LISTEN_V6_ONLY); return 0; } } # endif if (bind(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) != 0) { SYSerr(SYS_F_BIND, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_BIND_SOCKET); return 0; } if (socktype != SOCK_DGRAM && listen(sock, MAX_LISTEN) == -1) { SYSerr(SYS_F_LISTEN, get_last_socket_error()); BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_LISTEN_SOCKET); return 0; } return 1; }