314 lines
7.5 KiB
C
314 lines
7.5 KiB
C
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/*
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* TCP/IP or UDP/IP networking functions
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* modified for LWIP support on ESP8266
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* Additions Copyright (C) 2015 Angus Gratton
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#include "mbedtls/config.h"
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#if defined(MBEDTLS_NET_C)
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#include "mbedtls/net_sockets.h"
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#include <string.h>
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//
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#include <sys/types.h>
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#include <sys/socket.h>
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//#include <sys/time.h>
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#include <unistd.h>
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#include "lwip/netdb.h"
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#include <errno.h>
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//
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#include <stdlib.h>
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#include <stdio.h>
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//
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#include <time.h>
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//
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#include <stdint.h>
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/*
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* Prepare for using the sockets interface
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*/
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static int net_prepare( void )
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{
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return( 0 );
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}
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/*
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* Initialize a context
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*/
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void mbedtls_net_init( mbedtls_net_context *ctx )
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{
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ctx->fd = -1;
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}
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/*
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* Initiate a TCP connection with host:port and the given protocol
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*/
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int mbedtls_net_connect( mbedtls_net_context *ctx, const char *host, const char *port, int proto )
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{
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int ret;
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uint32 ports = getul((char*)port);
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struct sockaddr_in client_addr;
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struct sockaddr_in server_addr;
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if( ( ret = net_prepare() ) != 0 )
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return( ret );
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client_addr.sin_family = AF_INET;
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client_addr.sin_addr.s_addr = htons(IPADDR_ANY);
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client_addr.sin_port = htons(0);
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ctx->fd = socket(AF_INET, SOCK_STREAM,IPPROTO_TCP);
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if( ctx->fd < 0 ){
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ret = MBEDTLS_ERR_NET_SOCKET_FAILED;
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os_printf("Create Socket Failed!\n");
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goto mbedtls_error;
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}
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if (bind(ctx->fd, (struct sockaddr*)&client_addr,sizeof(client_addr))) {
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ret = MBEDTLS_ERR_NET_BIND_FAILED;
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os_printf("Client Bind Port Failed!\n");
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goto mbedtls_error;
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}
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = ipaddr_addr(host);
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server_addr.sin_port = htons(ports);
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ret = connect(ctx->fd, (struct sockaddr*)&server_addr, sizeof(server_addr));
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if (ret < 0){
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ret = MBEDTLS_ERR_NET_CONNECT_FAILED;
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os_printf("Can Not Connect To!\n");
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}
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mbedtls_error:
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if (ret < 0)
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close( ctx->fd );
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return( ret );
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}
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#if 0 // NodeMCU does not support being a TLS server
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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 mbedtls_net_bind( mbedtls_net_context *ctx, const char *bind_ip, const char *port, int proto )
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{
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int ret;
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int protocol = 0;
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int sock_type = 0;
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uint32 ports = getul((char*)port);
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struct sockaddr_in server_addr;
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if( ( ret = net_prepare() ) != 0 )
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return( ret );
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = htons(IPADDR_ANY);
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server_addr.sin_port = htons(ports);
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protocol = proto == MBEDTLS_NET_PROTO_UDP ? IPPROTO_UDP : IPPROTO_TCP;
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sock_type = proto == MBEDTLS_NET_PROTO_UDP ? SOCK_DGRAM : SOCK_STREAM;
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ctx->fd = socket(AF_INET, sock_type, protocol);
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if( ctx->fd < 0 ){
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ret = MBEDTLS_ERR_NET_SOCKET_FAILED;
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os_printf("Create Socket Failed!\n");
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goto mbedtls_error;
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}
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ret = bind(ctx->fd, (struct sockaddr*)&server_addr,sizeof(server_addr));
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if (ret != 0){
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ret = MBEDTLS_ERR_NET_BIND_FAILED;
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os_printf("Server Bind Port Failed!\n");
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goto mbedtls_error;
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}
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if (proto == MBEDTLS_NET_PROTO_TCP){
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ret = listen(ctx->fd, MBEDTLS_ERR_NET_LISTEN_FAILED);
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if (ret != 0){
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ret = MBEDTLS_ERR_NET_LISTEN_FAILED;
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goto mbedtls_error;
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}
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}
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ret = 0;
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mbedtls_error:
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if (ret < 0)
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close( ctx->fd );
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return( ret );
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}
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#endif
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/*
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* Check if the requested operation would be blocking on a non-blocking socket
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* and thus 'failed' with a negative return value.
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*
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* Note: on a blocking socket this function always returns 0!
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*/
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static int net_would_block( const mbedtls_net_context *ctx )
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{
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return( 0 );
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}
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#if 0 // NodeMCU does not support being a TLS server
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/*
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* Accept a connection from a remote client
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*/
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int mbedtls_net_accept( mbedtls_net_context *bind_ctx,
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mbedtls_net_context *client_ctx,
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void *client_ip, size_t buf_size, size_t *ip_len )
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{
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int ret;
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int type;
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struct sockaddr_in client_addr;
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socklen_t n = (socklen_t) sizeof( client_addr );
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socklen_t type_len = (socklen_t) sizeof( type );
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client_ctx->fd = (int) accept( bind_ctx->fd,(struct sockaddr *) &client_addr, &n );
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if (client_ctx->fd < 0){
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ret = MBEDTLS_ERR_NET_SOCKET_FAILED;
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os_printf("Create Socket Failed!\n");
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goto mbedtls_error;
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}
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if(client_ip != NULL){
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struct sockaddr_in *addr4 = (struct sockaddr_in *) &client_addr;
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*ip_len = sizeof( addr4->sin_addr.s_addr );
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if( buf_size < *ip_len ){
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ret = MBEDTLS_ERR_NET_BUFFER_TOO_SMALL;
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os_printf("Create Socket Failed!\n");
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goto mbedtls_error;
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}
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memcpy(client_ip, &addr4->sin_addr.s_addr, *ip_len);
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}
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ret = 0;
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mbedtls_error:
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if (ret < 0)
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close( client_ctx->fd );
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return( ret );
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return( 0 );
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}
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#endif
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/*
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* Set the socket blocking or non-blocking
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*/
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int mbedtls_net_set_block( mbedtls_net_context *ctx )
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{
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return( fcntl( ctx->fd, F_SETFL, fcntl( ctx->fd, F_GETFL, 0 ) & ~O_NONBLOCK ) );
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}
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int mbedtls_net_set_nonblock( mbedtls_net_context *ctx )
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{
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return( fcntl( ctx->fd, F_SETFL, fcntl( ctx->fd, F_GETFL, 0 ) | O_NONBLOCK ) );
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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 mbedtls_net_recv( void *ctx, unsigned char *buf, size_t len )
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{
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int ret;
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int fd = ((mbedtls_net_context *) ctx)->fd;
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if( fd < 0 )
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return( MBEDTLS_ERR_NET_INVALID_CONTEXT );
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// os_printf("mbedtls_net_recv need %d\n", len);
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ret = (int) read( fd, buf, len );
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if( ret < 0 )
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{
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if( net_would_block( ctx ) != 0 )
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return( MBEDTLS_ERR_SSL_WANT_READ );
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return( MBEDTLS_ERR_NET_RECV_FAILED );
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}
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// os_printf("mbedtls_net_recv get %d\n", ret);
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if (ret == 0)
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return( MBEDTLS_ERR_SSL_WANT_READ );
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return( ret );
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}
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/*
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* Read at most 'len' characters, blocking for at most 'timeout' ms
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*/
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int mbedtls_net_recv_timeout( void *ctx, unsigned char *buf, size_t len,
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uint32_t timeout )
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{
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int ret;
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struct timeval tv;
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fd_set read_fds;
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int fd = ((mbedtls_net_context *) ctx)->fd;
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if( fd < 0 )
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return( MBEDTLS_ERR_NET_INVALID_CONTEXT );
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/* This call will not block */
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return( mbedtls_net_recv( ctx, buf, len ) );
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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 mbedtls_net_send( void *ctx, const unsigned char *buf, size_t len )
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{
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int ret;
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int fd = ((mbedtls_net_context *) ctx)->fd;
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if( fd < 0 )
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return( MBEDTLS_ERR_NET_INVALID_CONTEXT );
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// os_printf("mbedtls_net_send need %d\n", len);
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ret = (int) write( fd, buf, len );
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if( ret < 0 )
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{
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if( net_would_block( ctx ) != 0 )
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return( MBEDTLS_ERR_SSL_WANT_WRITE );
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}
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// os_printf("mbedtls_net_send write %d\n", ret);
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if (ret == 0)
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return( MBEDTLS_ERR_SSL_WANT_WRITE );
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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 mbedtls_net_free( mbedtls_net_context *ctx )
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{
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if( ctx->fd == -1 )
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return;
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close( ctx->fd );
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ctx->fd = -1;
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}
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#endif /* MBEDTLS_NET_C */
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