468 lines
12 KiB
C
468 lines
12 KiB
C
/*
|
|
* Network function implementation with socket for ESP32 platform.
|
|
*
|
|
* Uses libcoap software implementation for failover when concurrent
|
|
* network operations are in use.
|
|
*
|
|
* coap_io.h -- Default network I/O functions for libcoap
|
|
*
|
|
* Copyright (C) 2012,2014 Olaf Bergmann <bergmann@tzi.org>
|
|
*
|
|
* Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
*
|
|
* This file is part of the CoAP library libcoap. Please see
|
|
* README for terms of use.
|
|
*/
|
|
|
|
#include "coap_config.h"
|
|
|
|
#ifdef HAVE_STDIO_H
|
|
# include <stdio.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_SELECT_H
|
|
# include <sys/select.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
# include <sys/socket.h>
|
|
#endif
|
|
#ifdef HAVE_NETINET_IN_H
|
|
# include <netinet/in.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_UIO_H
|
|
# include <sys/uio.h>
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif
|
|
#include <errno.h>
|
|
|
|
#ifdef WITH_CONTIKI
|
|
# include "uip.h"
|
|
#endif
|
|
|
|
#include "pdu.h"
|
|
#include "debug.h"
|
|
#include "mem.h"
|
|
#include "coap_io.h"
|
|
|
|
#ifdef WITH_POSIX
|
|
/* define generic PKTINFO for IPv4 */
|
|
#if defined(IP_PKTINFO)
|
|
# define GEN_IP_PKTINFO IP_PKTINFO
|
|
#elif defined(IP_RECVDSTADDR)
|
|
# define GEN_IP_PKTINFO IP_RECVDSTADDR
|
|
#else
|
|
# error "Need IP_PKTINFO or IP_RECVDSTADDR to request ancillary data from OS."
|
|
#endif /* IP_PKTINFO */
|
|
|
|
/* define generic KTINFO for IPv6 */
|
|
#ifdef IPV6_RECVPKTINFO
|
|
# define GEN_IPV6_PKTINFO IPV6_RECVPKTINFO
|
|
#elif defined(IPV6_PKTINFO)
|
|
# define GEN_IPV6_PKTINFO IPV6_PKTINFO
|
|
#else
|
|
# error "Need IPV6_PKTINFO or IPV6_RECVPKTINFO to request ancillary data from OS."
|
|
#endif /* IPV6_RECVPKTINFO */
|
|
|
|
struct coap_packet_t {
|
|
coap_if_handle_t hnd; /**< the interface handle */
|
|
coap_address_t src; /**< the packet's source address */
|
|
coap_address_t dst; /**< the packet's destination address */
|
|
const coap_endpoint_t *interface;
|
|
|
|
int ifindex;
|
|
void *session; /**< opaque session data */
|
|
|
|
size_t length; /**< length of payload */
|
|
unsigned char payload[]; /**< payload */
|
|
};
|
|
#endif
|
|
|
|
#ifdef CUSTOM_COAP_NETWORK_ENDPOINT
|
|
|
|
#ifdef WITH_CONTIKI
|
|
static int ep_initialized = 0;
|
|
|
|
static inline struct coap_endpoint_t *
|
|
coap_malloc_contiki_endpoint() {
|
|
static struct coap_endpoint_t ep;
|
|
|
|
if (ep_initialized) {
|
|
return NULL;
|
|
} else {
|
|
ep_initialized = 1;
|
|
return &ep;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
coap_free_contiki_endpoint(struct coap_endpoint_t *ep) {
|
|
ep_initialized = 0;
|
|
}
|
|
|
|
coap_endpoint_t *
|
|
coap_new_endpoint(const coap_address_t *addr, int flags) {
|
|
struct coap_endpoint_t *ep = coap_malloc_contiki_endpoint();
|
|
|
|
if (ep) {
|
|
memset(ep, 0, sizeof(struct coap_endpoint_t));
|
|
ep->handle.conn = udp_new(NULL, 0, NULL);
|
|
|
|
if (!ep->handle.conn) {
|
|
coap_free_endpoint(ep);
|
|
return NULL;
|
|
}
|
|
|
|
coap_address_init(&ep->addr);
|
|
uip_ipaddr_copy(&ep->addr.addr, &addr->addr);
|
|
ep->addr.port = addr->port;
|
|
udp_bind((struct uip_udp_conn *)ep->handle.conn, addr->port);
|
|
}
|
|
return ep;
|
|
}
|
|
|
|
void
|
|
coap_free_endpoint(coap_endpoint_t *ep) {
|
|
if (ep) {
|
|
if (ep->handle.conn) {
|
|
uip_udp_remove((struct uip_udp_conn *)ep->handle.conn);
|
|
}
|
|
coap_free_contiki_endpoint(ep);
|
|
}
|
|
}
|
|
|
|
#else /* WITH_CONTIKI */
|
|
static inline struct coap_endpoint_t *
|
|
coap_malloc_posix_endpoint(void) {
|
|
return (struct coap_endpoint_t *)coap_malloc(sizeof(struct coap_endpoint_t));
|
|
}
|
|
|
|
static inline void
|
|
coap_free_posix_endpoint(struct coap_endpoint_t *ep) {
|
|
coap_free(ep);
|
|
}
|
|
|
|
coap_endpoint_t *
|
|
coap_new_endpoint(const coap_address_t *addr, int flags) {
|
|
int sockfd = socket(addr->addr.sa.sa_family, SOCK_DGRAM, 0);
|
|
int on = 1;
|
|
struct coap_endpoint_t *ep;
|
|
|
|
if (sockfd < 0) {
|
|
coap_log(LOG_WARNING, "coap_new_endpoint: socket");
|
|
return NULL;
|
|
}
|
|
|
|
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
|
|
coap_log(LOG_WARNING, "coap_new_endpoint: setsockopt SO_REUSEADDR");
|
|
|
|
if (bind(sockfd, &addr->addr.sa, addr->size) < 0) {
|
|
coap_log(LOG_WARNING, "coap_new_endpoint: bind");
|
|
close (sockfd);
|
|
return NULL;
|
|
}
|
|
|
|
ep = coap_malloc_posix_endpoint();
|
|
if (!ep) {
|
|
coap_log(LOG_WARNING, "coap_new_endpoint: malloc");
|
|
close(sockfd);
|
|
return NULL;
|
|
}
|
|
|
|
memset(ep, 0, sizeof(struct coap_endpoint_t));
|
|
ep->handle.fd = sockfd;
|
|
ep->flags = flags;
|
|
|
|
ep->addr.size = addr->size;
|
|
if (getsockname(sockfd, &ep->addr.addr.sa, &ep->addr.size) < 0) {
|
|
coap_log(LOG_WARNING, "coap_new_endpoint: cannot determine local address");
|
|
close (sockfd);
|
|
return NULL;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
if (LOG_DEBUG <= coap_get_log_level()) {
|
|
#ifndef INET6_ADDRSTRLEN
|
|
#define INET6_ADDRSTRLEN 40
|
|
#endif
|
|
unsigned char addr_str[INET6_ADDRSTRLEN+8];
|
|
|
|
if (coap_print_addr(&ep->addr, addr_str, INET6_ADDRSTRLEN+8)) {
|
|
debug("created %sendpoint %s\n",
|
|
ep->flags & COAP_ENDPOINT_DTLS ? "DTLS " : "",
|
|
addr_str);
|
|
}
|
|
}
|
|
#endif /* NDEBUG */
|
|
|
|
return (coap_endpoint_t *)ep;
|
|
}
|
|
|
|
void
|
|
coap_free_endpoint(coap_endpoint_t *ep) {
|
|
if(ep) {
|
|
if (ep->handle.fd >= 0)
|
|
close(ep->handle.fd);
|
|
coap_free_posix_endpoint((struct coap_endpoint_t *)ep);
|
|
}
|
|
}
|
|
|
|
#endif /* WITH_CONTIKI */
|
|
#endif /* CUSTOM_COAP_NETWORK_ENDPOINT */
|
|
|
|
#ifdef CUSTOM_COAP_NETWORK_SEND
|
|
|
|
#if defined(WITH_POSIX) != defined(HAVE_NETINET_IN_H)
|
|
/* define struct in6_pktinfo and struct in_pktinfo if not available
|
|
FIXME: check with configure
|
|
*/
|
|
struct in6_pktinfo {
|
|
struct in6_addr ipi6_addr; /* src/dst IPv6 address */
|
|
unsigned int ipi6_ifindex; /* send/recv interface index */
|
|
};
|
|
|
|
struct in_pktinfo {
|
|
int ipi_ifindex;
|
|
struct in_addr ipi_spec_dst;
|
|
struct in_addr ipi_addr;
|
|
};
|
|
#endif
|
|
|
|
#if defined(WITH_POSIX) && !defined(SOL_IP)
|
|
/* Solaris expects level IPPROTO_IP for ancillary data. */
|
|
#define SOL_IP IPPROTO_IP
|
|
#endif
|
|
|
|
#ifdef __GNUC__
|
|
#define UNUSED_PARAM __attribute__ ((unused))
|
|
#else /* not a GCC */
|
|
#define UNUSED_PARAM
|
|
#endif /* GCC */
|
|
|
|
ssize_t
|
|
coap_network_send(struct coap_context_t *context UNUSED_PARAM,
|
|
const coap_endpoint_t *local_interface,
|
|
const coap_address_t *dst,
|
|
unsigned char *data,
|
|
size_t datalen) {
|
|
|
|
struct coap_endpoint_t *ep =
|
|
(struct coap_endpoint_t *)local_interface;
|
|
|
|
#ifndef WITH_CONTIKI
|
|
return sendto(ep->handle.fd, data, datalen, 0, (struct sockaddr*)&dst->addr.sa, sizeof(struct sockaddr));
|
|
#else /* WITH_CONTIKI */
|
|
/* FIXME: untested */
|
|
/* FIXME: is there a way to check if send was successful? */
|
|
uip_udp_packet_sendto((struct uip_udp_conn *)ep->handle.conn, data, datalen,
|
|
&dst->addr, dst->port);
|
|
return datalen;
|
|
#endif /* WITH_CONTIKI */
|
|
}
|
|
|
|
#endif /* CUSTOM_COAP_NETWORK_SEND */
|
|
|
|
#ifdef CUSTOM_COAP_NETWORK_READ
|
|
|
|
#define SIN6(A) ((struct sockaddr_in6 *)(A))
|
|
|
|
#ifdef WITH_POSIX
|
|
static coap_packet_t *
|
|
coap_malloc_packet(void) {
|
|
coap_packet_t *packet;
|
|
const size_t need = sizeof(coap_packet_t) + COAP_MAX_PDU_SIZE;
|
|
|
|
packet = (coap_packet_t *)coap_malloc(need);
|
|
if (packet) {
|
|
memset(packet, 0, need);
|
|
}
|
|
return packet;
|
|
}
|
|
|
|
void
|
|
coap_free_packet(coap_packet_t *packet) {
|
|
coap_free(packet);
|
|
}
|
|
#endif /* WITH_POSIX */
|
|
#ifdef WITH_CONTIKI
|
|
static inline coap_packet_t *
|
|
coap_malloc_packet(void) {
|
|
return (coap_packet_t *)coap_malloc_type(COAP_PACKET, 0);
|
|
}
|
|
|
|
void
|
|
coap_free_packet(coap_packet_t *packet) {
|
|
coap_free_type(COAP_PACKET, packet);
|
|
}
|
|
#endif /* WITH_CONTIKI */
|
|
|
|
static inline size_t
|
|
coap_get_max_packetlength(const coap_packet_t *packet UNUSED_PARAM) {
|
|
return COAP_MAX_PDU_SIZE;
|
|
}
|
|
|
|
void
|
|
coap_packet_populate_endpoint(coap_packet_t *packet, coap_endpoint_t *target)
|
|
{
|
|
target->handle = packet->interface->handle;
|
|
memcpy(&target->addr, &packet->dst, sizeof(target->addr));
|
|
target->ifindex = packet->ifindex;
|
|
target->flags = 0; /* FIXME */
|
|
}
|
|
void
|
|
coap_packet_copy_source(coap_packet_t *packet, coap_address_t *target)
|
|
{
|
|
memcpy(target, &packet->src, sizeof(coap_address_t));
|
|
}
|
|
void
|
|
coap_packet_get_memmapped(coap_packet_t *packet, unsigned char **address, size_t *length)
|
|
{
|
|
*address = packet->payload;
|
|
*length = packet->length;
|
|
}
|
|
|
|
/**
|
|
* Checks if a message with destination address @p dst matches the
|
|
* local interface with address @p local. This function returns @c 1
|
|
* if @p dst is a valid match, and @c 0 otherwise.
|
|
*/
|
|
static inline int
|
|
is_local_if(const coap_address_t *local, const coap_address_t *dst) {
|
|
return coap_address_isany(local) || coap_address_equals(dst, local) ||
|
|
coap_is_mcast(dst);
|
|
}
|
|
|
|
ssize_t
|
|
coap_network_read(coap_endpoint_t *ep, coap_packet_t **packet) {
|
|
ssize_t len = -1;
|
|
|
|
#ifdef WITH_POSIX
|
|
#define SOC_APPDATA_LEN 1460
|
|
char *soc_appdata = NULL;
|
|
struct sockaddr_in soc_srcipaddr;
|
|
socklen_t soc_srcsize = sizeof(struct sockaddr_in);
|
|
#endif /* WITH_POSIX */
|
|
|
|
assert(ep);
|
|
assert(packet);
|
|
|
|
*packet = coap_malloc_packet();
|
|
|
|
if (!*packet) {
|
|
warn("coap_network_read: insufficient memory, drop packet\n");
|
|
return -1;
|
|
}
|
|
|
|
coap_address_init(&(*packet)->dst); /* the local interface address */
|
|
coap_address_init(&(*packet)->src); /* the remote peer */
|
|
|
|
#ifdef WITH_POSIX
|
|
soc_appdata = coap_malloc(SOC_APPDATA_LEN);
|
|
if (soc_appdata){
|
|
len = recvfrom(ep->handle.fd, soc_appdata, SOC_APPDATA_LEN, 0, (struct sockaddr *)&soc_srcipaddr, (socklen_t *)&soc_srcsize);
|
|
|
|
if (len < 0){
|
|
coap_log(LOG_WARNING, "coap_network_read: %s\n", strerror(errno));
|
|
goto error;
|
|
} else {
|
|
/* use getsockname() to get the local port */
|
|
(*packet)->dst.size = sizeof((*packet)->dst.addr);
|
|
if (getsockname(ep->handle.fd, &(*packet)->dst.addr.sa, &(*packet)->dst.size) < 0) {
|
|
coap_log(LOG_DEBUG, "cannot determine local port\n");
|
|
goto error;
|
|
}
|
|
|
|
/* local interface for IPv4 */
|
|
(*packet)->src.size = sizeof((*packet)->src.addr);
|
|
memcpy(&(*packet)->src.addr.sa, &soc_srcipaddr, (*packet)->src.size);
|
|
|
|
if (len > coap_get_max_packetlength(*packet)) {
|
|
/* FIXME: we might want to send back a response */
|
|
warn("discarded oversized packet\n");
|
|
goto error;
|
|
}
|
|
|
|
if (!is_local_if(&ep->addr, &(*packet)->dst)) {
|
|
coap_log(LOG_DEBUG, "packet received on wrong interface, dropped\n");
|
|
printf("error 3\n");
|
|
goto error;
|
|
}
|
|
|
|
(*packet)->length = len;
|
|
|
|
memcpy(&(*packet)->payload, soc_appdata, len);
|
|
}
|
|
|
|
coap_free(soc_appdata);
|
|
soc_appdata = NULL;
|
|
} else {
|
|
goto error;
|
|
}
|
|
#endif /* WITH_POSIX */
|
|
#ifdef WITH_CONTIKI
|
|
/* FIXME: untested, make this work */
|
|
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
|
|
#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[UIP_LLIPH_LEN])
|
|
|
|
if(uip_newdata()) {
|
|
uip_ipaddr_copy(&(*packet)->src.addr, &UIP_IP_BUF->srcipaddr);
|
|
(*packet)->src.port = UIP_UDP_BUF->srcport;
|
|
uip_ipaddr_copy(&(*packet)->dst.addr, &UIP_IP_BUF->destipaddr);
|
|
(*packet)->dst.port = UIP_UDP_BUF->destport;
|
|
|
|
if (!is_local_if(&ep->addr, &(*packet)->dst)) {
|
|
coap_log(LOG_DEBUG, "packet received on wrong interface, dropped\n");
|
|
goto error;
|
|
}
|
|
|
|
len = uip_datalen();
|
|
|
|
if (len > coap_get_max_packetlength(*packet)) {
|
|
/* FIXME: we might want to send back a response */
|
|
warn("discarded oversized packet\n");
|
|
return -1;
|
|
}
|
|
|
|
((char *)uip_appdata)[len] = 0;
|
|
#ifndef NDEBUG
|
|
if (LOG_DEBUG <= coap_get_log_level()) {
|
|
#ifndef INET6_ADDRSTRLEN
|
|
#define INET6_ADDRSTRLEN 40
|
|
#endif
|
|
unsigned char addr_str[INET6_ADDRSTRLEN+8];
|
|
|
|
if (coap_print_addr(&(*packet)->src, addr_str, INET6_ADDRSTRLEN+8)) {
|
|
debug("received %zd bytes from %s\n", len, addr_str);
|
|
}
|
|
}
|
|
#endif /* NDEBUG */
|
|
|
|
(*packet)->length = len;
|
|
memcpy(&(*packet)->payload, uip_appdata, len);
|
|
}
|
|
|
|
#undef UIP_IP_BUF
|
|
#undef UIP_UDP_BUF
|
|
#endif /* WITH_CONTIKI */
|
|
#ifdef WITH_LWIP
|
|
#error "coap_network_read() not implemented on this platform"
|
|
#endif
|
|
|
|
(*packet)->interface = ep;
|
|
|
|
return len;
|
|
error:
|
|
#ifdef WITH_POSIX
|
|
if (soc_appdata)
|
|
coap_free(soc_appdata);
|
|
soc_appdata = NULL;
|
|
#endif
|
|
coap_free_packet(*packet);
|
|
*packet = NULL;
|
|
return -1;
|
|
}
|
|
|
|
#undef SIN6
|
|
|
|
#endif /* CUSTOM_COAP_NETWORK_READ */
|