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Diffstat (limited to 'tinyNET/src/tnet_socket.c')
| -rw-r--r-- | tinyNET/src/tnet_socket.c | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/tinyNET/src/tnet_socket.c b/tinyNET/src/tnet_socket.c new file mode 100644 index 0000000..2d104d1 --- /dev/null +++ b/tinyNET/src/tnet_socket.c @@ -0,0 +1,339 @@ +/* +* Copyright (C) 2010-2015 Mamadou DIOP. +* +* This file is part of Open Source Doubango Framework. +* +* DOUBANGO is free software: you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* DOUBANGO is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with DOUBANGO. +* +*/ + +/**@file tnet.h + * @brief Protocol agnostic socket. + * + */ + +#include "tnet_socket.h" + +#include "tnet_utils.h" + +#include "tsk_string.h" +#include "tsk_debug.h" + +#include <string.h> + +/**@defgroup tnet_socket_group Protocol agnostic socket +* +* +* <h2>10.1 Sockets</h2> +* For performance reason, all sockets created using tinyNET are non-blocking by default. +* The newly created socket will be automatically bound to associate it with an IP address and port number. @ref tnet_socket_create() function is used to create and bind a +* non-blocking socket. You should use @ref tnet_socket_create_2() function to control whether the socket should be bound or not. The same function is used to force the stack to create a blocking socket.<br> +* A socket object is defined like this:<br> +* +* @code +typedef struct tnet_socket_s +{ +TSK_DECLARE_OBJECT; + +tnet_socket_type_t type; +tnet_fd_t fd; +tnet_ip_t ip; +uint16_t port; + +tnet_tls_socket_handle_t* tlshandle; +} +tnet_socket_t; +* @endcode +* To create a socket: +* @code +// (create udp ipv4 or ipv6 socket) +tnet_socket_t* socket = tnet_socket_create( +TNET_SOCKET_HOST_ANY, // local ip address/hostname to bind to +TNET_SOCKET_PORT_ANY, // local port number to bind to +tnet_socket_type_udp_ipv46 // the socket type (IPv4 or IPv6) +); +// TNET_SOCKET_HOST_ANY --> bind to "0.0.0.0" or "::" +// TNET_SOCKET_PORT_ANY --> bind to any available port +* @endcode + +* <b>TNET_SOCKET_TYPE_IS_*()</b> macros are used to determine: +* - The socket type (stream, dgram), +* - The socket protocol (udp, tcp, tls, sctp, ipsec), +* - The IP version (ipv6, ipv4), +* - … +* <br> +* A socket is a well-defined object and should be destroyed using @a TSK_DECLARE_SAFE_FREE() macro. +* A socket will be automatically closed when destroyed. +* +*/ + +static int tnet_socket_close(tnet_socket_t *sock); + +/**@ingroup tnet_socket_group +* Creates a new socket. +* To check that the returned socket is valid use @ref TNET_SOCKET_IS_VALID function. +* @param host FQDN (e.g. www.doubango.org) or IPv4/IPv6 IP string. +* @param port The local/remote port used to receive/send data. Set the port value to @ref TNET_SOCKET_PORT_ANY to bind to a random port. +* @param type The type of the socket. See @ref tnet_socket_type_t. +* @param nonblocking Indicates whether to create non-blocking socket. +* @param bindsocket Indicates whether to bind the newly created socket or not. +* @retval @ref tnet_socket_t object. +* @sa @ref tnet_socket_create. +*/ +tnet_socket_t* tnet_socket_create_2(const char* host, tnet_port_t port_, tnet_socket_type_t type, tsk_bool_t nonblocking, tsk_bool_t bindsocket) +{ + tnet_socket_t *sock; + if ((sock = tsk_object_new(tnet_socket_def_t))) { + int status; + tsk_istr_t port; + struct addrinfo *result = tsk_null; + struct addrinfo *ptr = tsk_null; + struct addrinfo hints; + tnet_host_t local_hostname; + + sock->port = port_; + tsk_itoa(sock->port, &port); + sock->type = type; + + memset(local_hostname, 0, sizeof(local_hostname)); + + /* Get the local host name */ + if (host != TNET_SOCKET_HOST_ANY && !tsk_strempty(host)){ + memcpy(local_hostname, host, tsk_strlen(host) > sizeof(local_hostname) - 1 ? sizeof(local_hostname) - 1 : tsk_strlen(host)); + } + else{ + if (TNET_SOCKET_TYPE_IS_IPV6(sock->type)){ + memcpy(local_hostname, "::", 2); + } + else { + memcpy(local_hostname, "0.0.0.0", 7); + } + } + + /* hints address info structure */ + memset(&hints, 0, sizeof(hints)); + hints.ai_family = TNET_SOCKET_TYPE_IS_IPV46(sock->type) ? AF_UNSPEC : (TNET_SOCKET_TYPE_IS_IPV6(sock->type) ? AF_INET6 : AF_INET); + hints.ai_socktype = TNET_SOCKET_TYPE_IS_STREAM(sock->type) ? SOCK_STREAM : SOCK_DGRAM; + hints.ai_protocol = TNET_SOCKET_TYPE_IS_STREAM(sock->type) ? IPPROTO_TCP : IPPROTO_UDP; + hints.ai_flags = AI_PASSIVE +#if !TNET_UNDER_WINDOWS || _WIN32_WINNT>=0x600 + | AI_ADDRCONFIG +#endif + ; + + /* Performs getaddrinfo */ + if ((status = tnet_getaddrinfo(local_hostname, port, &hints, &result))) { + TNET_PRINT_LAST_ERROR("tnet_getaddrinfo(family=%d, hostname=%s and port=%s) failed: [%s]", + hints.ai_family, local_hostname, port, tnet_gai_strerror(status)); + goto bail; + } + + /* Find our address. */ + for (ptr = result; ptr; ptr = ptr->ai_next){ + sock->fd = (tnet_fd_t)tnet_soccket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol); + if (ptr->ai_family != AF_INET6 && ptr->ai_family != AF_INET){ + continue; + } + /* To avoid "Address already in use" error + * Check issue 368 (https://code.google.com/p/doubango/issues/detail?id=368) to understand why it's not used for UDP/DTLS. + */ + // + if (TNET_SOCKET_TYPE_IS_STREAM(sock->type)) { + if ((status = tnet_sockfd_reuseaddr(sock->fd, 1))) { + // do not break...continue + } + } + + if (bindsocket){ + /* Bind the socket */ + if ((status = bind(sock->fd, ptr->ai_addr, (int)ptr->ai_addrlen))){ + TNET_PRINT_LAST_ERROR("bind to [%s:%s]have failed", local_hostname, port); + tnet_socket_close(sock); + continue; + } + + /* Get local IP string. */ + if ((status = tnet_get_ip_n_port(sock->fd, tsk_true/*local*/, &sock->ip, &sock->port))) /* % */ + //if((status = tnet_getnameinfo(ptr->ai_addr, ptr->ai_addrlen, sock->ip, sizeof(sock->ip), 0, 0, NI_NUMERICHOST))) + { + TNET_PRINT_LAST_ERROR("Failed to get local IP and port."); + tnet_socket_close(sock); + continue; + } + } + + /* sets the real socket type (if ipv46) */ + if (ptr->ai_family == AF_INET6) { + TNET_SOCKET_TYPE_SET_IPV6Only(sock->type); + } + else { + TNET_SOCKET_TYPE_SET_IPV4Only(sock->type); + } + break; + } + + /* Check socket validity. */ + if (!TNET_SOCKET_IS_VALID(sock)) { + TNET_PRINT_LAST_ERROR("Invalid socket."); + goto bail; + } + +#if TNET_UNDER_IPHONE || TNET_UNDER_IPHONE_SIMULATOR + /* disable SIGPIPE signal */ + { + int yes = 1; + if (setsockopt(sock->fd, SOL_SOCKET, SO_NOSIGPIPE, (char*)&yes, sizeof(int))){ + TNET_PRINT_LAST_ERROR("setsockopt(SO_NOSIGPIPE) have failed."); + } + } +#endif /* TNET_UNDER_IPHONE */ + + /* Sets the socket to nonblocking mode */ + if(nonblocking){ + if((status = tnet_sockfd_set_nonblocking(sock->fd))){ + goto bail; + } + } + + bail: + /* Free addrinfo */ + tnet_freeaddrinfo(result); + + /* Close socket if failed. */ + if (status){ + if (TNET_SOCKET_IS_VALID(sock)){ + tnet_socket_close(sock); + } + return tsk_null; + } +} + + return sock; +} + +/**@ingroup tnet_socket_group +* Creates a non-blocking socket and bind it. +* To check that the returned socket is valid use @ref TNET_SOCKET_IS_VALID function. +* @param host FQDN (e.g. www.doubango.org) or IPv4/IPv6 IP string. +* @param port The local/remote port used to receive/send data. Set the port value to @ref TNET_SOCKET_PORT_ANY to bind to a random port. +* @param type The type of the socket. See @ref tnet_socket_type_t. +* @retval @ref tnet_socket_t object. +*/ +tnet_socket_t* tnet_socket_create(const char* host, tnet_port_t port, tnet_socket_type_t type) +{ + return tnet_socket_create_2(host, port, type, tsk_true, tsk_true); +} + +/**@ingroup tnet_socket_group +* Returns the number of bytes sent (or negative value on error) +*/ +int tnet_socket_send_stream(tnet_socket_t* self, const void* data, tsk_size_t size) +{ + if (!self || self->fd == TNET_INVALID_FD || !data || !size || !TNET_SOCKET_TYPE_IS_STREAM(self->type)) { + TSK_DEBUG_ERROR("Invalid parameter"); + return -1; + } + if (self->tlshandle && (TNET_SOCKET_TYPE_IS_TLS(self->type) || TNET_SOCKET_TYPE_IS_WSS(self->type))) { + return tnet_tls_socket_send(self->tlshandle, data, size) == 0 ? (int)size : -1; // returns zero on success + } + + return (int)tnet_sockfd_send(self->fd, data, size, 0); +} + +/**@ingroup tnet_socket_group + * @retval Zero if succeed and nonzero error code otherwise. + */ +int tnet_socket_handle_brokenpipe(tnet_socket_t* self) +{ + int ret; + tnet_fd_t fd_old, fd_new; + if (!self || !TNET_SOCKET_TYPE_IS_DGRAM(self->type)) { // Must be UDP + TSK_DEBUG_ERROR("Invalid parameter"); + return -1; + } + fd_old = self->fd; + fd_new = TNET_INVALID_FD; + + // close old fd + ret = tnet_sockfd_close(&self->fd); + // try to create an fd binding to the same address + if ((ret = tnet_sockfd_init(self->ip, self->port, self->type, &fd_new)) != 0) { + TNET_PRINT_LAST_ERROR("Find to bind to %s:%d", self->ip, self->port); + // TODO: Create completly new socket? + return ret; + } +#if TNET_UNDER_IPHONE || TNET_UNDER_IPHONE_SIMULATOR + /* disable SIGPIPE signal */ + { + int yes = 1; + if (setsockopt(fd_new, SOL_SOCKET, SO_NOSIGPIPE, (char*)&yes, sizeof(int))){ + TNET_PRINT_LAST_ERROR("setsockopt(%d, SO_NOSIGPIPE) have failed", fd_new); + } + } +#endif /* TNET_UNDER_IPHONE || TNET_UNDER_IPHONE_SIMULATOR */ + TSK_DEBUG_INFO("Broken pipe result for {%s:%d}: %d -> %d", self->ip, self->port, fd_old, fd_new); + self->fd = fd_new; + return 0; +} + +/**@ingroup tnet_socket_group + * Closes a socket. + * @param sock The socket to close. + * @retval Zero if succeed and nonzero error code otherwise. + **/ +static int tnet_socket_close(tnet_socket_t *sock) +{ + return tnet_sockfd_close(&(sock->fd)); +} + +//================================================================================================= +// SOCKET object definition +// +static tsk_object_t* tnet_socket_ctor(tsk_object_t * self, va_list * app) +{ + tnet_socket_t *sock = self; + if (sock){ + } + return self; +} + +static tsk_object_t* tnet_socket_dtor(tsk_object_t * self) +{ + tnet_socket_t *sock = self; + + if (sock){ + /* Close the socket */ + if (TNET_SOCKET_IS_VALID(sock)){ + tnet_socket_close(sock); + } + /* Clean up TLS handle */ + TSK_OBJECT_SAFE_FREE(sock->tlshandle); + + /* Clean up DTLS handle */ + TSK_OBJECT_SAFE_FREE(sock->dtlshandle); + } + + return self; +} + +static const tsk_object_def_t tnet_socket_def_s = +{ + sizeof(tnet_socket_t), + tnet_socket_ctor, + tnet_socket_dtor, + tsk_null, +}; +const tsk_object_def_t *tnet_socket_def_t = &tnet_socket_def_s; + + |
