| /* |
| * 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. */ |
| #define _POSIX_C_SOURCE 200112L |
| #define _XOPEN_SOURCE 600 /* sockaddr_storage */ |
| |
| #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 ); |
| } |
| |
| /* |
| * 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) |
| 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; |
| |
| if( fd < 0 ) |
| return( MBEDTLS_ERR_NET_INVALID_CONTEXT ); |
| |
| #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; |
| |
| if( fd < 0 ) |
| return( MBEDTLS_ERR_NET_INVALID_CONTEXT ); |
| |
| 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; |
| |
| if( fd < 0 ) |
| return( MBEDTLS_ERR_NET_INVALID_CONTEXT ); |
| |
| 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; |
| |
| if( fd < 0 ) |
| return( MBEDTLS_ERR_NET_INVALID_CONTEXT ); |
| |
| 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 */ |