mirror of
https://github.com/yuzu-emu/mbedtls
synced 2024-11-25 07:48:52 +00:00
355 lines
8.3 KiB
C
355 lines
8.3 KiB
C
/*
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* TCP networking functions
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*
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* Copyright (C) 2006-2010, Paul Bakker <polarssl_maintainer at polarssl.org>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "polarssl/config.h"
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#if defined(POLARSSL_NET_C)
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#include "polarssl/net.h"
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#if defined(_WIN32) || defined(_WIN32_WCE)
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#include <winsock2.h>
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#include <windows.h>
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#if defined(_WIN32_WCE)
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#pragma comment( lib, "ws2.lib" )
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#else
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#pragma comment( lib, "ws2_32.lib" )
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#endif
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#define read(fd,buf,len) recv(fd,buf,len,0)
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#define write(fd,buf,len) send(fd,buf,len,0)
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#define close(fd) closesocket(fd)
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static int wsa_init_done = 0;
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#else
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <errno.h>
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#if defined(__FreeBSD__)
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#include <sys/endian.h>
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#elif defined(__APPLE__)
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#include <machine/endian.h>
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#else
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#include <endian.h>
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#endif
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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/*
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* htons() is not always available.
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* By default go for LITTLE_ENDIAN variant. Otherwise hope for _BYTE_ORDER and __BIG_ENDIAN
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* to help determine endianess.
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*/
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#if defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN
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#define POLARSSL_HTONS(n) (n)
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#else
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#define POLARSSL_HTONS(n) (((((unsigned short)(n) & 0xFF)) << 8) | (((unsigned short)(n) & 0xFF00) >> 8))
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#endif
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unsigned short net_htons(unsigned short n);
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#define net_htons(n) POLARSSL_HTONS(n)
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/*
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* Initiate a TCP connection with host:port
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*/
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int net_connect( int *fd, const char *host, int port )
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{
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struct sockaddr_in server_addr;
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struct hostent *server_host;
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#if defined(_WIN32) || defined(_WIN32_WCE)
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WSADATA wsaData;
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if( wsa_init_done == 0 )
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{
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if( WSAStartup( MAKEWORD(2,0), &wsaData ) == SOCKET_ERROR )
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return( POLARSSL_ERR_NET_SOCKET_FAILED );
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wsa_init_done = 1;
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}
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#else
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signal( SIGPIPE, SIG_IGN );
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#endif
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if( ( server_host = gethostbyname( host ) ) == NULL )
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return( POLARSSL_ERR_NET_UNKNOWN_HOST );
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if( ( *fd = socket( AF_INET, SOCK_STREAM, IPPROTO_IP ) ) < 0 )
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return( POLARSSL_ERR_NET_SOCKET_FAILED );
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memcpy( (void *) &server_addr.sin_addr,
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(void *) server_host->h_addr,
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server_host->h_length );
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = net_htons( port );
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if( connect( *fd, (struct sockaddr *) &server_addr,
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sizeof( server_addr ) ) < 0 )
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{
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close( *fd );
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return( POLARSSL_ERR_NET_CONNECT_FAILED );
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}
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return( 0 );
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}
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/*
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* Create a listening socket on bind_ip:port
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*/
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int net_bind( int *fd, const char *bind_ip, int port )
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{
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int n, c[4];
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struct sockaddr_in server_addr;
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#if defined(_WIN32) || defined(_WIN32_WCE)
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WSADATA wsaData;
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if( wsa_init_done == 0 )
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{
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if( WSAStartup( MAKEWORD(2,0), &wsaData ) == SOCKET_ERROR )
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return( POLARSSL_ERR_NET_SOCKET_FAILED );
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wsa_init_done = 1;
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}
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#else
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signal( SIGPIPE, SIG_IGN );
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#endif
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if( ( *fd = socket( AF_INET, SOCK_STREAM, IPPROTO_IP ) ) < 0 )
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return( POLARSSL_ERR_NET_SOCKET_FAILED );
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n = 1;
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setsockopt( *fd, SOL_SOCKET, SO_REUSEADDR,
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(const char *) &n, sizeof( n ) );
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server_addr.sin_addr.s_addr = INADDR_ANY;
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = net_htons( port );
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if( bind_ip != NULL )
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{
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memset( c, 0, sizeof( c ) );
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sscanf( bind_ip, "%d.%d.%d.%d", &c[0], &c[1], &c[2], &c[3] );
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for( n = 0; n < 4; n++ )
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if( c[n] < 0 || c[n] > 255 )
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break;
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if( n == 4 )
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server_addr.sin_addr.s_addr =
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( (unsigned long) c[0] << 24 ) |
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( (unsigned long) c[1] << 16 ) |
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( (unsigned long) c[2] << 8 ) |
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( (unsigned long) c[3] );
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}
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if( bind( *fd, (struct sockaddr *) &server_addr,
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sizeof( server_addr ) ) < 0 )
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{
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close( *fd );
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return( POLARSSL_ERR_NET_BIND_FAILED );
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}
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if( listen( *fd, 10 ) != 0 )
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{
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close( *fd );
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return( POLARSSL_ERR_NET_LISTEN_FAILED );
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}
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return( 0 );
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}
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/*
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* Check if the current operation is blocking
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*/
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static int net_is_blocking( void )
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{
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#if defined(_WIN32) || defined(_WIN32_WCE)
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return( WSAGetLastError() == WSAEWOULDBLOCK );
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#else
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switch( errno )
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{
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#if defined EAGAIN
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case EAGAIN:
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#endif
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#if defined EWOULDBLOCK && EWOULDBLOCK != EAGAIN
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case EWOULDBLOCK:
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#endif
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return( 1 );
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}
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return( 0 );
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#endif
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}
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/*
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* Accept a connection from a remote client
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*/
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int net_accept( int bind_fd, int *client_fd, void *client_ip )
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{
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struct sockaddr_in client_addr;
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#if defined(__socklen_t_defined) || defined(_SOCKLEN_T)
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socklen_t n = (socklen_t) sizeof( client_addr );
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#else
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int n = (int) sizeof( client_addr );
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#endif
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*client_fd = accept( bind_fd, (struct sockaddr *)
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&client_addr, &n );
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if( *client_fd < 0 )
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{
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if( net_is_blocking() != 0 )
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return( POLARSSL_ERR_NET_TRY_AGAIN );
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return( POLARSSL_ERR_NET_ACCEPT_FAILED );
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}
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if( client_ip != NULL )
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memcpy( client_ip, &client_addr.sin_addr.s_addr,
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sizeof( client_addr.sin_addr.s_addr ) );
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return( 0 );
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}
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/*
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* Set the socket blocking or non-blocking
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*/
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int net_set_block( int fd )
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{
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#if defined(_WIN32) || defined(_WIN32_WCE)
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long n = 0;
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return( ioctlsocket( fd, FIONBIO, &n ) );
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#else
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return( fcntl( fd, F_SETFL, fcntl( fd, F_GETFL ) & ~O_NONBLOCK ) );
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#endif
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}
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int net_set_nonblock( int fd )
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{
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#if defined(_WIN32) || defined(_WIN32_WCE)
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long n = 1;
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return( ioctlsocket( fd, FIONBIO, &n ) );
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#else
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return( fcntl( fd, F_SETFL, fcntl( fd, F_GETFL ) | O_NONBLOCK ) );
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#endif
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}
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/*
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* Portable usleep helper
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*/
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void net_usleep( unsigned long usec )
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{
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = usec;
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select( 0, NULL, NULL, NULL, &tv );
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}
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/*
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* Read at most 'len' characters
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*/
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int net_recv( void *ctx, unsigned char *buf, int len )
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{
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int ret = read( *((int *) ctx), buf, len );
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if( len > 0 && ret == 0 )
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return( POLARSSL_ERR_NET_CONN_RESET );
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if( ret < 0 )
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{
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if( net_is_blocking() != 0 )
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return( POLARSSL_ERR_NET_TRY_AGAIN );
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#if defined(_WIN32) || defined(_WIN32_WCE)
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if( WSAGetLastError() == WSAECONNRESET )
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return( POLARSSL_ERR_NET_CONN_RESET );
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#else
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if( errno == EPIPE || errno == ECONNRESET )
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return( POLARSSL_ERR_NET_CONN_RESET );
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if( errno == EINTR )
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return( POLARSSL_ERR_NET_TRY_AGAIN );
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#endif
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return( POLARSSL_ERR_NET_RECV_FAILED );
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}
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return( ret );
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}
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/*
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* Write at most 'len' characters
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*/
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int net_send( void *ctx, unsigned char *buf, int len )
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{
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int ret = write( *((int *) ctx), buf, len );
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if( ret < 0 )
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{
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if( net_is_blocking() != 0 )
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return( POLARSSL_ERR_NET_TRY_AGAIN );
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#if defined(_WIN32) || defined(_WIN32_WCE)
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if( WSAGetLastError() == WSAECONNRESET )
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return( POLARSSL_ERR_NET_CONN_RESET );
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#else
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if( errno == EPIPE || errno == ECONNRESET )
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return( POLARSSL_ERR_NET_CONN_RESET );
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if( errno == EINTR )
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return( POLARSSL_ERR_NET_TRY_AGAIN );
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#endif
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return( POLARSSL_ERR_NET_SEND_FAILED );
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}
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return( ret );
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}
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/*
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* Gracefully close the connection
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*/
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void net_close( int fd )
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{
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shutdown( fd, 2 );
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close( fd );
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}
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#endif
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