diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/net_sockets.c')
-rw-r--r-- | lib/mbedtls-2.27.0/library/net_sockets.c | 713 |
1 files changed, 0 insertions, 713 deletions
diff --git a/lib/mbedtls-2.27.0/library/net_sockets.c b/lib/mbedtls-2.27.0/library/net_sockets.c deleted file mode 100644 index 5fbe1f7..0000000 --- a/lib/mbedtls-2.27.0/library/net_sockets.c +++ /dev/null @@ -1,713 +0,0 @@ -/* - * TCP/IP or UDP/IP networking functions - * - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/* Enable definition of getaddrinfo() even when compiling with -std=c99. Must - * be set before config.h, which pulls in glibc's features.h indirectly. - * Harmless on other platforms. */ -#ifndef _POSIX_C_SOURCE -#define _POSIX_C_SOURCE 200112L -#endif -#ifndef _XOPEN_SOURCE -#define _XOPEN_SOURCE 600 /* sockaddr_storage */ -#endif - -#include "common.h" - -#if defined(MBEDTLS_NET_C) - -#if !defined(unix) && !defined(__unix__) && !defined(__unix) && \ - !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__) && \ - !defined(__HAIKU__) && !defined(__midipix__) -#error "This module only works on Unix and Windows, see MBEDTLS_NET_C in config.h" -#endif - -#if defined(MBEDTLS_PLATFORM_C) -#include "mbedtls/platform.h" -#else -#include <stdlib.h> -#endif - -#include "mbedtls/net_sockets.h" -#include "mbedtls/error.h" - -#include <string.h> - -#if (defined(_WIN32) || defined(_WIN32_WCE)) && !defined(EFIX64) && \ - !defined(EFI32) - -#define IS_EINTR( ret ) ( ( ret ) == WSAEINTR ) - -#if !defined(_WIN32_WINNT) -/* Enables getaddrinfo() & Co */ -#define _WIN32_WINNT 0x0501 -#endif - -#include <ws2tcpip.h> - -#include <winsock2.h> -#include <windows.h> -#if (_WIN32_WINNT < 0x0501) -#include <wspiapi.h> -#endif - -#if defined(_MSC_VER) -#if defined(_WIN32_WCE) -#pragma comment( lib, "ws2.lib" ) -#else -#pragma comment( lib, "ws2_32.lib" ) -#endif -#endif /* _MSC_VER */ - -#define read(fd,buf,len) recv( fd, (char*)( buf ), (int)( len ), 0 ) -#define write(fd,buf,len) send( fd, (char*)( buf ), (int)( len ), 0 ) -#define close(fd) closesocket(fd) - -static int wsa_init_done = 0; - -#else /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */ - -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <arpa/inet.h> -#include <sys/time.h> -#include <unistd.h> -#include <signal.h> -#include <fcntl.h> -#include <netdb.h> -#include <errno.h> - -#define IS_EINTR( ret ) ( ( ret ) == EINTR ) - -#endif /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */ - -/* Some MS functions want int and MSVC warns if we pass size_t, - * but the standard functions use socklen_t, so cast only for MSVC */ -#if defined(_MSC_VER) -#define MSVC_INT_CAST (int) -#else -#define MSVC_INT_CAST -#endif - -#include <stdio.h> - -#include <time.h> - -#include <stdint.h> - -/* - * Prepare for using the sockets interface - */ -static int net_prepare( void ) -{ -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) - WSADATA wsaData; - - if( wsa_init_done == 0 ) - { - if( WSAStartup( MAKEWORD(2,0), &wsaData ) != 0 ) - return( MBEDTLS_ERR_NET_SOCKET_FAILED ); - - wsa_init_done = 1; - } -#else -#if !defined(EFIX64) && !defined(EFI32) - signal( SIGPIPE, SIG_IGN ); -#endif -#endif - return( 0 ); -} - -/* - * Return 0 if the file descriptor is valid, an error otherwise. - * If for_select != 0, check whether the file descriptor is within the range - * allowed for fd_set used for the FD_xxx macros and the select() function. - */ -static int check_fd( int fd, int for_select ) -{ - if( fd < 0 ) - return( MBEDTLS_ERR_NET_INVALID_CONTEXT ); - -#if (defined(_WIN32) || defined(_WIN32_WCE)) && !defined(EFIX64) && \ - !defined(EFI32) - (void) for_select; -#else - /* A limitation of select() is that it only works with file descriptors - * that are strictly less than FD_SETSIZE. This is a limitation of the - * fd_set type. Error out early, because attempting to call FD_SET on a - * large file descriptor is a buffer overflow on typical platforms. */ - if( for_select && fd >= FD_SETSIZE ) - return( MBEDTLS_ERR_NET_POLL_FAILED ); -#endif - - return( 0 ); -} - -/* - * Initialize a context - */ -void mbedtls_net_init( mbedtls_net_context *ctx ) -{ - ctx->fd = -1; -} - -/* - * Initiate a TCP connection with host:port and the given protocol - */ -int mbedtls_net_connect( mbedtls_net_context *ctx, const char *host, - const char *port, int proto ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - struct addrinfo hints, *addr_list, *cur; - - if( ( ret = net_prepare() ) != 0 ) - return( ret ); - - /* Do name resolution with both IPv6 and IPv4 */ - memset( &hints, 0, sizeof( hints ) ); - hints.ai_family = AF_UNSPEC; - hints.ai_socktype = proto == MBEDTLS_NET_PROTO_UDP ? SOCK_DGRAM : SOCK_STREAM; - hints.ai_protocol = proto == MBEDTLS_NET_PROTO_UDP ? IPPROTO_UDP : IPPROTO_TCP; - - if( getaddrinfo( host, port, &hints, &addr_list ) != 0 ) - return( MBEDTLS_ERR_NET_UNKNOWN_HOST ); - - /* Try the sockaddrs until a connection succeeds */ - ret = MBEDTLS_ERR_NET_UNKNOWN_HOST; - for( cur = addr_list; cur != NULL; cur = cur->ai_next ) - { - ctx->fd = (int) socket( cur->ai_family, cur->ai_socktype, - cur->ai_protocol ); - if( ctx->fd < 0 ) - { - ret = MBEDTLS_ERR_NET_SOCKET_FAILED; - continue; - } - - if( connect( ctx->fd, cur->ai_addr, MSVC_INT_CAST cur->ai_addrlen ) == 0 ) - { - ret = 0; - break; - } - - close( ctx->fd ); - ret = MBEDTLS_ERR_NET_CONNECT_FAILED; - } - - freeaddrinfo( addr_list ); - - return( ret ); -} - -/* - * Create a listening socket on bind_ip:port - */ -int mbedtls_net_bind( mbedtls_net_context *ctx, const char *bind_ip, const char *port, int proto ) -{ - int n, ret; - struct addrinfo hints, *addr_list, *cur; - - if( ( ret = net_prepare() ) != 0 ) - return( ret ); - - /* Bind to IPv6 and/or IPv4, but only in the desired protocol */ - memset( &hints, 0, sizeof( hints ) ); - hints.ai_family = AF_UNSPEC; - hints.ai_socktype = proto == MBEDTLS_NET_PROTO_UDP ? SOCK_DGRAM : SOCK_STREAM; - hints.ai_protocol = proto == MBEDTLS_NET_PROTO_UDP ? IPPROTO_UDP : IPPROTO_TCP; - if( bind_ip == NULL ) - hints.ai_flags = AI_PASSIVE; - - if( getaddrinfo( bind_ip, port, &hints, &addr_list ) != 0 ) - return( MBEDTLS_ERR_NET_UNKNOWN_HOST ); - - /* Try the sockaddrs until a binding succeeds */ - ret = MBEDTLS_ERR_NET_UNKNOWN_HOST; - for( cur = addr_list; cur != NULL; cur = cur->ai_next ) - { - ctx->fd = (int) socket( cur->ai_family, cur->ai_socktype, - cur->ai_protocol ); - if( ctx->fd < 0 ) - { - ret = MBEDTLS_ERR_NET_SOCKET_FAILED; - continue; - } - - n = 1; - if( setsockopt( ctx->fd, SOL_SOCKET, SO_REUSEADDR, - (const char *) &n, sizeof( n ) ) != 0 ) - { - close( ctx->fd ); - ret = MBEDTLS_ERR_NET_SOCKET_FAILED; - continue; - } - - if( bind( ctx->fd, cur->ai_addr, MSVC_INT_CAST cur->ai_addrlen ) != 0 ) - { - close( ctx->fd ); - ret = MBEDTLS_ERR_NET_BIND_FAILED; - continue; - } - - /* Listen only makes sense for TCP */ - if( proto == MBEDTLS_NET_PROTO_TCP ) - { - if( listen( ctx->fd, MBEDTLS_NET_LISTEN_BACKLOG ) != 0 ) - { - close( ctx->fd ); - ret = MBEDTLS_ERR_NET_LISTEN_FAILED; - continue; - } - } - - /* Bind was successful */ - ret = 0; - break; - } - - freeaddrinfo( addr_list ); - - return( ret ); - -} - -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) -/* - * Check if the requested operation would be blocking on a non-blocking socket - * and thus 'failed' with a negative return value. - */ -static int net_would_block( const mbedtls_net_context *ctx ) -{ - ((void) ctx); - return( WSAGetLastError() == WSAEWOULDBLOCK ); -} -#else -/* - * Check if the requested operation would be blocking on a non-blocking socket - * and thus 'failed' with a negative return value. - * - * Note: on a blocking socket this function always returns 0! - */ -static int net_would_block( const mbedtls_net_context *ctx ) -{ - int err = errno; - - /* - * Never return 'WOULD BLOCK' on a blocking socket - */ - if( ( fcntl( ctx->fd, F_GETFL ) & O_NONBLOCK ) != O_NONBLOCK ) - { - errno = err; - return( 0 ); - } - - switch( errno = err ) - { -#if defined EAGAIN - case EAGAIN: -#endif -#if defined EWOULDBLOCK && EWOULDBLOCK != EAGAIN - case EWOULDBLOCK: -#endif - return( 1 ); - } - return( 0 ); -} -#endif /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */ - -/* - * Accept a connection from a remote client - */ -int mbedtls_net_accept( mbedtls_net_context *bind_ctx, - mbedtls_net_context *client_ctx, - void *client_ip, size_t buf_size, size_t *ip_len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - int type; - - struct sockaddr_storage client_addr; - -#if defined(__socklen_t_defined) || defined(_SOCKLEN_T) || \ - defined(_SOCKLEN_T_DECLARED) || defined(__DEFINED_socklen_t) || \ - defined(socklen_t) || (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L) - socklen_t n = (socklen_t) sizeof( client_addr ); - socklen_t type_len = (socklen_t) sizeof( type ); -#else - int n = (int) sizeof( client_addr ); - int type_len = (int) sizeof( type ); -#endif - - /* Is this a TCP or UDP socket? */ - if( getsockopt( bind_ctx->fd, SOL_SOCKET, SO_TYPE, - (void *) &type, &type_len ) != 0 || - ( type != SOCK_STREAM && type != SOCK_DGRAM ) ) - { - return( MBEDTLS_ERR_NET_ACCEPT_FAILED ); - } - - if( type == SOCK_STREAM ) - { - /* TCP: actual accept() */ - ret = client_ctx->fd = (int) accept( bind_ctx->fd, - (struct sockaddr *) &client_addr, &n ); - } - else - { - /* UDP: wait for a message, but keep it in the queue */ - char buf[1] = { 0 }; - - ret = (int) recvfrom( bind_ctx->fd, buf, sizeof( buf ), MSG_PEEK, - (struct sockaddr *) &client_addr, &n ); - -#if defined(_WIN32) - if( ret == SOCKET_ERROR && - WSAGetLastError() == WSAEMSGSIZE ) - { - /* We know buf is too small, thanks, just peeking here */ - ret = 0; - } -#endif - } - - if( ret < 0 ) - { - if( net_would_block( bind_ctx ) != 0 ) - return( MBEDTLS_ERR_SSL_WANT_READ ); - - return( MBEDTLS_ERR_NET_ACCEPT_FAILED ); - } - - /* UDP: hijack the listening socket to communicate with the client, - * then bind a new socket to accept new connections */ - if( type != SOCK_STREAM ) - { - struct sockaddr_storage local_addr; - int one = 1; - - if( connect( bind_ctx->fd, (struct sockaddr *) &client_addr, n ) != 0 ) - return( MBEDTLS_ERR_NET_ACCEPT_FAILED ); - - client_ctx->fd = bind_ctx->fd; - bind_ctx->fd = -1; /* In case we exit early */ - - n = sizeof( struct sockaddr_storage ); - if( getsockname( client_ctx->fd, - (struct sockaddr *) &local_addr, &n ) != 0 || - ( bind_ctx->fd = (int) socket( local_addr.ss_family, - SOCK_DGRAM, IPPROTO_UDP ) ) < 0 || - setsockopt( bind_ctx->fd, SOL_SOCKET, SO_REUSEADDR, - (const char *) &one, sizeof( one ) ) != 0 ) - { - return( MBEDTLS_ERR_NET_SOCKET_FAILED ); - } - - if( bind( bind_ctx->fd, (struct sockaddr *) &local_addr, n ) != 0 ) - { - return( MBEDTLS_ERR_NET_BIND_FAILED ); - } - } - - if( client_ip != NULL ) - { - if( client_addr.ss_family == AF_INET ) - { - struct sockaddr_in *addr4 = (struct sockaddr_in *) &client_addr; - *ip_len = sizeof( addr4->sin_addr.s_addr ); - - if( buf_size < *ip_len ) - return( MBEDTLS_ERR_NET_BUFFER_TOO_SMALL ); - - memcpy( client_ip, &addr4->sin_addr.s_addr, *ip_len ); - } - else - { - struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) &client_addr; - *ip_len = sizeof( addr6->sin6_addr.s6_addr ); - - if( buf_size < *ip_len ) - return( MBEDTLS_ERR_NET_BUFFER_TOO_SMALL ); - - memcpy( client_ip, &addr6->sin6_addr.s6_addr, *ip_len); - } - } - - return( 0 ); -} - -/* - * Set the socket blocking or non-blocking - */ -int mbedtls_net_set_block( mbedtls_net_context *ctx ) -{ -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) - u_long n = 0; - return( ioctlsocket( ctx->fd, FIONBIO, &n ) ); -#else - return( fcntl( ctx->fd, F_SETFL, fcntl( ctx->fd, F_GETFL ) & ~O_NONBLOCK ) ); -#endif -} - -int mbedtls_net_set_nonblock( mbedtls_net_context *ctx ) -{ -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) - u_long n = 1; - return( ioctlsocket( ctx->fd, FIONBIO, &n ) ); -#else - return( fcntl( ctx->fd, F_SETFL, fcntl( ctx->fd, F_GETFL ) | O_NONBLOCK ) ); -#endif -} - -/* - * Check if data is available on the socket - */ - -int mbedtls_net_poll( mbedtls_net_context *ctx, uint32_t rw, uint32_t timeout ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - struct timeval tv; - - fd_set read_fds; - fd_set write_fds; - - int fd = ctx->fd; - - ret = check_fd( fd, 1 ); - if( ret != 0 ) - return( ret ); - -#if defined(__has_feature) -#if __has_feature(memory_sanitizer) - /* Ensure that memory sanitizers consider read_fds and write_fds as - * initialized even on platforms such as Glibc/x86_64 where FD_ZERO - * is implemented in assembly. */ - memset( &read_fds, 0, sizeof( read_fds ) ); - memset( &write_fds, 0, sizeof( write_fds ) ); -#endif -#endif - - FD_ZERO( &read_fds ); - if( rw & MBEDTLS_NET_POLL_READ ) - { - rw &= ~MBEDTLS_NET_POLL_READ; - FD_SET( fd, &read_fds ); - } - - FD_ZERO( &write_fds ); - if( rw & MBEDTLS_NET_POLL_WRITE ) - { - rw &= ~MBEDTLS_NET_POLL_WRITE; - FD_SET( fd, &write_fds ); - } - - if( rw != 0 ) - return( MBEDTLS_ERR_NET_BAD_INPUT_DATA ); - - tv.tv_sec = timeout / 1000; - tv.tv_usec = ( timeout % 1000 ) * 1000; - - do - { - ret = select( fd + 1, &read_fds, &write_fds, NULL, - timeout == (uint32_t) -1 ? NULL : &tv ); - } - while( IS_EINTR( ret ) ); - - if( ret < 0 ) - return( MBEDTLS_ERR_NET_POLL_FAILED ); - - ret = 0; - if( FD_ISSET( fd, &read_fds ) ) - ret |= MBEDTLS_NET_POLL_READ; - if( FD_ISSET( fd, &write_fds ) ) - ret |= MBEDTLS_NET_POLL_WRITE; - - return( ret ); -} - -/* - * Portable usleep helper - */ -void mbedtls_net_usleep( unsigned long usec ) -{ -#if defined(_WIN32) - Sleep( ( usec + 999 ) / 1000 ); -#else - struct timeval tv; - tv.tv_sec = usec / 1000000; -#if defined(__unix__) || defined(__unix) || \ - ( defined(__APPLE__) && defined(__MACH__) ) - tv.tv_usec = (suseconds_t) usec % 1000000; -#else - tv.tv_usec = usec % 1000000; -#endif - select( 0, NULL, NULL, NULL, &tv ); -#endif -} - -/* - * Read at most 'len' characters - */ -int mbedtls_net_recv( void *ctx, unsigned char *buf, size_t len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - int fd = ((mbedtls_net_context *) ctx)->fd; - - ret = check_fd( fd, 0 ); - if( ret != 0 ) - return( ret ); - - ret = (int) read( fd, buf, len ); - - if( ret < 0 ) - { - if( net_would_block( ctx ) != 0 ) - return( MBEDTLS_ERR_SSL_WANT_READ ); - -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) - if( WSAGetLastError() == WSAECONNRESET ) - return( MBEDTLS_ERR_NET_CONN_RESET ); -#else - if( errno == EPIPE || errno == ECONNRESET ) - return( MBEDTLS_ERR_NET_CONN_RESET ); - - if( errno == EINTR ) - return( MBEDTLS_ERR_SSL_WANT_READ ); -#endif - - return( MBEDTLS_ERR_NET_RECV_FAILED ); - } - - return( ret ); -} - -/* - * Read at most 'len' characters, blocking for at most 'timeout' ms - */ -int mbedtls_net_recv_timeout( void *ctx, unsigned char *buf, - size_t len, uint32_t timeout ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - struct timeval tv; - fd_set read_fds; - int fd = ((mbedtls_net_context *) ctx)->fd; - - ret = check_fd( fd, 1 ); - if( ret != 0 ) - return( ret ); - - FD_ZERO( &read_fds ); - FD_SET( fd, &read_fds ); - - tv.tv_sec = timeout / 1000; - tv.tv_usec = ( timeout % 1000 ) * 1000; - - ret = select( fd + 1, &read_fds, NULL, NULL, timeout == 0 ? NULL : &tv ); - - /* Zero fds ready means we timed out */ - if( ret == 0 ) - return( MBEDTLS_ERR_SSL_TIMEOUT ); - - if( ret < 0 ) - { -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) - if( WSAGetLastError() == WSAEINTR ) - return( MBEDTLS_ERR_SSL_WANT_READ ); -#else - if( errno == EINTR ) - return( MBEDTLS_ERR_SSL_WANT_READ ); -#endif - - return( MBEDTLS_ERR_NET_RECV_FAILED ); - } - - /* This call will not block */ - return( mbedtls_net_recv( ctx, buf, len ) ); -} - -/* - * Write at most 'len' characters - */ -int mbedtls_net_send( void *ctx, const unsigned char *buf, size_t len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - int fd = ((mbedtls_net_context *) ctx)->fd; - - ret = check_fd( fd, 0 ); - if( ret != 0 ) - return( ret ); - - ret = (int) write( fd, buf, len ); - - if( ret < 0 ) - { - if( net_would_block( ctx ) != 0 ) - return( MBEDTLS_ERR_SSL_WANT_WRITE ); - -#if ( defined(_WIN32) || defined(_WIN32_WCE) ) && !defined(EFIX64) && \ - !defined(EFI32) - if( WSAGetLastError() == WSAECONNRESET ) - return( MBEDTLS_ERR_NET_CONN_RESET ); -#else - if( errno == EPIPE || errno == ECONNRESET ) - return( MBEDTLS_ERR_NET_CONN_RESET ); - - if( errno == EINTR ) - return( MBEDTLS_ERR_SSL_WANT_WRITE ); -#endif - - return( MBEDTLS_ERR_NET_SEND_FAILED ); - } - - return( ret ); -} - -/* - * Close the connection - */ -void mbedtls_net_close( mbedtls_net_context *ctx ) -{ - if( ctx->fd == -1 ) - return; - - close( ctx->fd ); - - ctx->fd = -1; -} - -/* - * Gracefully close the connection - */ -void mbedtls_net_free( mbedtls_net_context *ctx ) -{ - if( ctx->fd == -1 ) - return; - - shutdown( ctx->fd, 2 ); - close( ctx->fd ); - - ctx->fd = -1; -} - -#endif /* MBEDTLS_NET_C */ |