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/*
* Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @{
*
* @file
* @brief GNRC implementation of @ref net_sock_ip
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#include <errno.h>
#include "byteorder.h"
#include "net/af.h"
#include "net/protnum.h"
#include "net/gnrc/ipv6.h"
#include "net/sock/ip.h"
#include "random.h"
#include "gnrc_sock_internal.h"
int sock_ip_create(sock_ip_t *sock, const sock_ip_ep_t *local,
const sock_ip_ep_t *remote, uint8_t proto, uint16_t flags)
{
assert(sock);
if ((local != NULL) && (remote != NULL) &&
(local->netif != SOCK_ADDR_ANY_NETIF) &&
(remote->netif != SOCK_ADDR_ANY_NETIF) &&
(local->netif != remote->netif)) {
return -EINVAL;
}
memset(&sock->local, 0, sizeof(sock_ip_ep_t));
if (local != NULL) {
if (gnrc_af_not_supported(local->family)) {
return -EAFNOSUPPORT;
}
memcpy(&sock->local, local, sizeof(sock_ip_ep_t));
}
memset(&sock->remote, 0, sizeof(sock_ip_ep_t));
if (remote != NULL) {
if (gnrc_af_not_supported(remote->family)) {
return -EAFNOSUPPORT;
}
if (gnrc_ep_addr_any(remote)) {
return -EINVAL;
}
memcpy(&sock->remote, remote, sizeof(sock_ip_ep_t));
}
gnrc_sock_create(&sock->reg, GNRC_NETTYPE_IPV6,
proto);
sock->flags = flags;
return 0;
}
void sock_ip_close(sock_ip_t *sock)
{
assert(sock != NULL);
gnrc_netreg_unregister(GNRC_NETTYPE_IPV6, &sock->reg.entry);
}
int sock_ip_get_local(sock_ip_t *sock, sock_ip_ep_t *local)
{
assert(sock && local);
if (sock->local.family == AF_UNSPEC) {
return -EADDRNOTAVAIL;
}
memcpy(local, &sock->local, sizeof(sock_ip_ep_t));
return 0;
}
int sock_ip_get_remote(sock_ip_t *sock, sock_ip_ep_t *remote)
{
assert(sock && remote);
if (sock->remote.family == AF_UNSPEC) {
return -ENOTCONN;
}
memcpy(remote, &sock->remote, sizeof(sock_ip_ep_t));
return 0;
}
ssize_t sock_ip_recv(sock_ip_t *sock, void *data, size_t max_len,
uint32_t timeout, sock_ip_ep_t *remote)
{
gnrc_pktsnip_t *pkt;
sock_ip_ep_t tmp;
int res;
assert((sock != NULL) && (data != NULL) && (max_len > 0));
if (sock->local.family == 0) {
return -EADDRNOTAVAIL;
}
tmp.family = sock->local.family;
res = gnrc_sock_recv((gnrc_sock_reg_t *)sock, &pkt, timeout, &tmp);
if (res < 0) {
return res;
}
if (pkt->size > max_len) {
gnrc_pktbuf_release(pkt);
return -ENOBUFS;
}
if (remote != NULL) {
/* return remote to possibly block if wrong remote */
memcpy(remote, &tmp, sizeof(tmp));
}
if ((sock->remote.family != AF_UNSPEC) && /* check remote end-point if set */
/* We only have IPv6 for now, so just comparing the whole end point
* should suffice */
((memcmp(&sock->remote.addr, &ipv6_addr_unspecified,
sizeof(ipv6_addr_t)) != 0) &&
(memcmp(&sock->remote.addr, &tmp.addr, sizeof(ipv6_addr_t)) != 0))) {
gnrc_pktbuf_release(pkt);
return -EPROTO;
}
memcpy(data, pkt->data, pkt->size);
gnrc_pktbuf_release(pkt);
return (int)pkt->size;
}
ssize_t sock_ip_send(sock_ip_t *sock, const void *data, size_t len,
uint8_t proto, const sock_ip_ep_t *remote)
{
int res;
gnrc_pktsnip_t *pkt;
sock_ip_ep_t local;
sock_ip_ep_t rem;
assert((sock != NULL) || (remote != NULL));
assert((len == 0) || (data != NULL)); /* (len != 0) => (data != NULL) */
if ((remote != NULL) && (sock != NULL) &&
(sock->local.netif != SOCK_ADDR_ANY_NETIF) &&
(remote->netif != SOCK_ADDR_ANY_NETIF) &&
(sock->local.netif != remote->netif)) {
return -EINVAL;
}
if ((remote == NULL) &&
/* sock can't be NULL as per assertion above */
(sock->remote.family == AF_UNSPEC)) {
return -ENOTCONN;
}
else if ((remote != NULL) && (gnrc_ep_addr_any(remote))) {
return -EINVAL;
}
/* compiler evaluates lazily so this isn't a redundundant check and cppcheck
* is being weird here anyways */
/* cppcheck-suppress nullPointerRedundantCheck */
/* cppcheck-suppress nullPointer */
if ((sock == NULL) || (sock->local.family == AF_UNSPEC)) {
/* no sock or sock currently unbound */
memset(&local, 0, sizeof(local));
}
else {
if (sock != NULL) {
proto = (uint8_t)sock->reg.entry.demux_ctx;
}
memcpy(&local, &sock->local, sizeof(local));
}
if (remote == NULL) {
/* sock can't be NULL at this point */
memcpy(&rem, &sock->remote, sizeof(rem));
}
else {
memcpy(&rem, remote, sizeof(rem));
}
if ((remote != NULL) && (remote->family == AF_UNSPEC) &&
(sock->remote.family != AF_UNSPEC)) {
/* remote was set on create so take its family */
rem.family = sock->remote.family;
}
else if ((remote != NULL) && gnrc_af_not_supported(remote->family)) {
return -EAFNOSUPPORT;
}
else if ((local.family == AF_UNSPEC) && (rem.family != AF_UNSPEC)) {
/* local was set to 0 above */
local.family = rem.family;
}
else if ((local.family != AF_UNSPEC) && (rem.family == AF_UNSPEC)) {
/* local was given on create, but remote family wasn't given by user and
* there was no remote given on create, take from local */
rem.family = local.family;
}
pkt = gnrc_pktbuf_add(NULL, (void *)data, len, GNRC_NETTYPE_UNDEF);
if (pkt == NULL) {
return -ENOMEM;
}
res = gnrc_sock_send(pkt, &local, &rem, proto);
if (res <= 0) {
return res;
}
return res;
}
/** @} */
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