mirror of
https://github.com/espressif/esp-idf.git
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461 lines
12 KiB
C
461 lines
12 KiB
C
/*
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* TCP/IP or UDP/IP networking functions
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* modified for LWIP support on ESP32
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*
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* SPDX-FileCopyrightText: The Mbed TLS Contributors
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* SPDX-FileContributor: 2015 Angus Gratton
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*/
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#include <mbedtls/build_info.h>
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#if !defined(MBEDTLS_NET_C)
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdlib.h>
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#define mbedtls_time time
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#define mbedtls_time_t time_t
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#endif
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#include "mbedtls/net_sockets.h"
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <netdb.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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#include <stdint.h>
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#include <fcntl.h>
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#include <errno.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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struct addrinfo hints, *addr_list, *cur;
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if ( ( ret = net_prepare() ) != 0 ) {
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return ( ret );
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}
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/* Do name resolution with both IPv6 and IPv4 */
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memset( &hints, 0, sizeof( hints ) );
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = proto == MBEDTLS_NET_PROTO_UDP ? SOCK_DGRAM : SOCK_STREAM;
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hints.ai_protocol = proto == MBEDTLS_NET_PROTO_UDP ? IPPROTO_UDP : IPPROTO_TCP;
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if ( getaddrinfo( host, port, &hints, &addr_list ) != 0 ) {
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return ( MBEDTLS_ERR_NET_UNKNOWN_HOST );
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}
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/* Try the sockaddrs until a connection succeeds */
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ret = MBEDTLS_ERR_NET_UNKNOWN_HOST;
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for ( cur = addr_list; cur != NULL; cur = cur->ai_next ) {
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int fd = socket( cur->ai_family, cur->ai_socktype, cur->ai_protocol );
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if ( fd < 0 ) {
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ret = MBEDTLS_ERR_NET_SOCKET_FAILED;
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continue;
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}
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if ( connect( fd, cur->ai_addr, cur->ai_addrlen ) == 0 ) {
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ctx->fd = fd; // connected!
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ret = 0;
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break;
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}
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close( fd );
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ret = MBEDTLS_ERR_NET_CONNECT_FAILED;
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}
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freeaddrinfo( addr_list );
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return ( ret );
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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 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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struct addrinfo hints, *addr_list, *cur;
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struct sockaddr_storage *serv_addr = NULL;
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#if SO_REUSE
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int n = 1;
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#endif
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if ( ( ret = net_prepare() ) != 0 ) {
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return ( ret );
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}
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/* Bind to IPv6 and/or IPv4, but only in the desired protocol */
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memset( &hints, 0, sizeof( hints ) );
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = proto == MBEDTLS_NET_PROTO_UDP ? SOCK_DGRAM : SOCK_STREAM;
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hints.ai_protocol = proto == MBEDTLS_NET_PROTO_UDP ? IPPROTO_UDP : IPPROTO_TCP;
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if ( getaddrinfo( bind_ip, port, &hints, &addr_list ) != 0 ) {
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return ( MBEDTLS_ERR_NET_UNKNOWN_HOST );
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}
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/* Try the sockaddrs until a binding succeeds */
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ret = MBEDTLS_ERR_NET_UNKNOWN_HOST;
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for ( cur = addr_list; cur != NULL; cur = cur->ai_next ) {
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int fd = socket( cur->ai_family, cur->ai_socktype, cur->ai_protocol );
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if ( fd < 0 ) {
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ret = MBEDTLS_ERR_NET_SOCKET_FAILED;
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continue;
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}
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/*SO_REUSEADDR option dafault is disable in source code(lwip)*/
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#if SO_REUSE
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if ( setsockopt( fd, SOL_SOCKET, SO_REUSEADDR,
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(const char *) &n, sizeof( n ) ) != 0 ) {
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close( fd );
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ret = MBEDTLS_ERR_NET_SOCKET_FAILED;
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continue;
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}
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#endif
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serv_addr = (struct sockaddr_storage *) cur->ai_addr;
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#if CONFIG_LWIP_IPV4
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if (cur->ai_family == AF_INET) {
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/*bind interface dafault don't process the addr is 0xffffffff for TCP Protocol*/
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struct sockaddr_in *p = (struct sockaddr_in *)serv_addr;
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p->sin_addr.s_addr = htonl(INADDR_ANY); /* Any incoming interface */
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}
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#endif // CONFIG_LWIP_IPV4
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#if CONFIG_LWIP_IPV6
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if (cur->ai_family == AF_INET6) {
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struct sockaddr_in6 *p = (struct sockaddr_in6 *) serv_addr;
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struct in6_addr inaddr_any = IN6ADDR_ANY_INIT;
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p->sin6_addr = inaddr_any;
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}
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#endif // CONFIG_LWIP_IPV6
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if ( bind( fd, (struct sockaddr *)serv_addr, cur->ai_addrlen ) != 0 ) {
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close( fd );
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ret = MBEDTLS_ERR_NET_BIND_FAILED;
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continue;
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}
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/* Listen only makes sense for TCP */
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if ( proto == MBEDTLS_NET_PROTO_TCP ) {
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if ( listen( fd, MBEDTLS_NET_LISTEN_BACKLOG ) != 0 ) {
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close( fd );
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ret = MBEDTLS_ERR_NET_LISTEN_FAILED;
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continue;
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}
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}
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/* I we ever get there, it's a success */
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ctx->fd = fd;
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ret = 0;
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break;
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}
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freeaddrinfo( addr_list );
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return ( ret );
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}
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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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int error = errno;
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switch ( errno = error ) {
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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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}
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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_storage 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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/* Is this a TCP or UDP socket? */
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if ( getsockopt( bind_ctx->fd, SOL_SOCKET, SO_TYPE,
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(void *) &type, (socklen_t *) &type_len ) != 0 ||
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( type != SOCK_STREAM && type != SOCK_DGRAM ) ) {
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return ( MBEDTLS_ERR_NET_ACCEPT_FAILED );
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}
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if ( type == SOCK_STREAM ) {
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/* TCP: actual accept() */
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ret = client_ctx->fd = (int) accept( bind_ctx->fd,
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(struct sockaddr *) &client_addr, &n );
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} else {
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/* UDP: wait for a message, but keep it in the queue */
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char buf[1] = { 0 };
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ret = recvfrom( bind_ctx->fd, buf, sizeof( buf ), MSG_PEEK,
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(struct sockaddr *) &client_addr, &n );
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}
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if ( ret < 0 ) {
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if ( net_would_block( bind_ctx ) != 0 ) {
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return ( MBEDTLS_ERR_SSL_WANT_READ );
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}
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return ( MBEDTLS_ERR_NET_ACCEPT_FAILED );
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}
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/* UDP: hijack the listening socket to communicate with the client,
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* then bind a new socket to accept new connections */
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if ( type != SOCK_STREAM ) {
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struct sockaddr_storage local_addr;
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int one = 1;
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if ( connect( bind_ctx->fd, (struct sockaddr *) &client_addr, n ) != 0 ) {
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return ( MBEDTLS_ERR_NET_ACCEPT_FAILED );
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}
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client_ctx->fd = bind_ctx->fd;
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bind_ctx->fd = -1; /* In case we exit early */
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n = sizeof( struct sockaddr_storage );
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if ( getsockname( client_ctx->fd,
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(struct sockaddr *) &local_addr, &n ) != 0 ||
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( bind_ctx->fd = (int) socket( local_addr.ss_family,
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SOCK_DGRAM, IPPROTO_UDP ) ) < 0 ||
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setsockopt( bind_ctx->fd, SOL_SOCKET, SO_REUSEADDR,
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(const char *) &one, sizeof( one ) ) != 0 ) {
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return ( MBEDTLS_ERR_NET_SOCKET_FAILED );
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}
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if ( bind( bind_ctx->fd, (struct sockaddr *) &local_addr, n ) != 0 ) {
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return ( MBEDTLS_ERR_NET_BIND_FAILED );
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}
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}
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if ( client_ip != NULL ) {
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#ifdef CONFIG_LWIP_IPV4
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if( client_addr.ss_family == AF_INET )
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{
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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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return ( MBEDTLS_ERR_NET_BUFFER_TOO_SMALL );
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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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#endif // CONFIG_LWIP_IPV4
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#ifdef CONFIG_LWIP_IPV6
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if( client_addr.ss_family == AF_INET6 )
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{
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) &client_addr;
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*ip_len = sizeof( addr6->sin6_addr.s6_addr );
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if( buf_size < *ip_len ) {
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return( MBEDTLS_ERR_NET_BUFFER_TOO_SMALL );
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}
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memcpy( client_ip, &addr6->sin6_addr.s6_addr, *ip_len);
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}
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#endif // CONFIG_LWIP_IPV6
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}
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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 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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* Portable usleep helper
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*/
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void mbedtls_net_usleep( unsigned long usec )
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{
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struct timeval tv;
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tv.tv_sec = usec / 1000000;
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tv.tv_usec = usec % 1000000;
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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 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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}
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ret = (int) read( fd, buf, len );
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if ( ret < 0 ) {
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if ( net_would_block( ctx ) != 0 ) {
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return ( MBEDTLS_ERR_SSL_WANT_READ );
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}
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if ( errno == EPIPE || errno == ECONNRESET ) {
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return ( MBEDTLS_ERR_NET_CONN_RESET );
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}
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if ( errno == EINTR ) {
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return ( MBEDTLS_ERR_SSL_WANT_READ );
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}
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return ( MBEDTLS_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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* 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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}
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FD_ZERO( &read_fds );
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FD_SET( fd, &read_fds );
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = ( timeout % 1000 ) * 1000;
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ret = select( fd + 1, &read_fds, NULL, NULL, timeout == 0 ? NULL : &tv );
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/* Zero fds ready means we timed out */
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if ( ret == 0 ) {
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return ( MBEDTLS_ERR_SSL_TIMEOUT );
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}
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if ( ret < 0 ) {
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if ( errno == EINTR ) {
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return ( MBEDTLS_ERR_SSL_WANT_READ );
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}
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return ( MBEDTLS_ERR_NET_RECV_FAILED );
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}
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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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}
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ret = (int) write( fd, buf, len );
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if ( ret < 0 ) {
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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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if ( errno == EPIPE || errno == ECONNRESET ) {
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return ( MBEDTLS_ERR_NET_CONN_RESET );
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}
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if ( errno == EINTR ) {
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return ( MBEDTLS_ERR_SSL_WANT_WRITE );
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}
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return ( MBEDTLS_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 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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}
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shutdown( ctx->fd, 2);
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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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