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/*
* Copyright (C) 2016 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
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#include <errno.h>
#include "net/af.h"
#include "net/ipv6/hdr.h"
#include "net/gnrc/ipv6/hdr.h"
#include "net/gnrc/ipv6/netif.h"
#include "net/gnrc/netreg.h"
#include "net/udp.h"
#include "utlist.h"
#include "xtimer.h"
#include "sock_types.h"
#include "gnrc_sock_internal.h"
#ifdef MODULE_XTIMER
#define _TIMEOUT_MAGIC (0xF38A0B63U)
#define _TIMEOUT_MSG_TYPE (0x8474)
static void _callback_put(void *arg)
{
msg_t timeout_msg = { .sender_pid = KERNEL_PID_UNDEF,
.type = _TIMEOUT_MSG_TYPE,
.content = { .value = _TIMEOUT_MAGIC } };
gnrc_sock_reg_t *reg = arg;
/* should be safe, because otherwise if mbox were filled this callback is
* senseless */
mbox_try_put(®->mbox, &timeout_msg);
}
#endif
void gnrc_sock_create(gnrc_sock_reg_t *reg, gnrc_nettype_t type, uint32_t demux_ctx)
{
mbox_init(®->mbox, reg->mbox_queue, SOCK_MBOX_SIZE);
gnrc_netreg_entry_init_mbox(®->entry, demux_ctx, ®->mbox);
gnrc_netreg_register(type, ®->entry);
}
ssize_t gnrc_sock_recv(gnrc_sock_reg_t *reg, gnrc_pktsnip_t **pkt_out,
uint32_t timeout, sock_ip_ep_t *remote)
{
gnrc_pktsnip_t *pkt, *ip, *netif;
msg_t msg;
#ifdef MODULE_XTIMER
xtimer_t timeout_timer;
if ((timeout != SOCK_NO_TIMEOUT) && (timeout != 0)) {
timeout_timer.callback = _callback_put;
timeout_timer.arg = reg;
xtimer_set(&timeout_timer, timeout);
}
#endif
if (timeout != 0) {
mbox_get(®->mbox, &msg);
}
else {
if (!mbox_try_get(®->mbox, &msg)) {
return -EAGAIN;
}
}
#ifdef MODULE_XTIMER
xtimer_remove(&timeout_timer);
#endif
switch (msg.type) {
case GNRC_NETAPI_MSG_TYPE_RCV:
pkt = msg.content.ptr;
break;
#ifdef MODULE_XTIMER
case _TIMEOUT_MSG_TYPE:
if (msg.content.value == _TIMEOUT_MAGIC) {
return -ETIMEDOUT;
}
#endif
default:
return -EINTR;
}
/* TODO: discern NETTYPE from remote->family (set in caller), when IPv4
* was implemented */
ipv6_hdr_t *ipv6_hdr;
ip = gnrc_pktsnip_search_type(pkt, GNRC_NETTYPE_IPV6);
assert((ip != NULL) && (ip->size >= 40));
ipv6_hdr = ip->data;
memcpy(&remote->addr, &ipv6_hdr->src, sizeof(ipv6_addr_t));
remote->family = AF_INET6;
netif = gnrc_pktsnip_search_type(pkt, GNRC_NETTYPE_NETIF);
if (netif == NULL) {
remote->netif = SOCK_ADDR_ANY_NETIF;
}
else {
gnrc_netif_hdr_t *netif_hdr = netif->data;
/* TODO: use API in #5511 */
remote->netif = (uint16_t)netif_hdr->if_pid;
}
*pkt_out = pkt; /* set out parameter */
return 0;
}
ssize_t gnrc_sock_send(gnrc_pktsnip_t *payload, sock_ip_ep_t *local,
const sock_ip_ep_t *remote, uint8_t nh)
{
gnrc_pktsnip_t *pkt;
kernel_pid_t iface = KERNEL_PID_UNDEF;
gnrc_nettype_t type;
size_t payload_len = gnrc_pkt_len(payload);
if (local->family != remote->family) {
gnrc_pktbuf_release(payload);
return -EAFNOSUPPORT;
}
switch (local->family) {
#ifdef SOCK_HAS_IPV6
case AF_INET6: {
ipv6_hdr_t *hdr;
pkt = gnrc_ipv6_hdr_build(payload, (ipv6_addr_t *)&local->addr.ipv6,
(ipv6_addr_t *)&remote->addr.ipv6);
if (pkt == NULL) {
return -ENOMEM;
}
if (payload->type == GNRC_NETTYPE_UNDEF) {
payload->type = GNRC_NETTYPE_IPV6;
type = GNRC_NETTYPE_IPV6;
}
else {
type = payload->type;
}
hdr = pkt->data;
hdr->nh = nh;
break;
}
#endif
default:
(void)nh;
gnrc_pktbuf_release(payload);
return -EAFNOSUPPORT;
}
if (local->netif != SOCK_ADDR_ANY_NETIF) {
/* TODO: use API in #5511 */
iface = (kernel_pid_t)local->netif;
}
else if (remote->netif != SOCK_ADDR_ANY_NETIF) {
/* TODO: use API in #5511 */
iface = (kernel_pid_t)remote->netif;
}
if (iface != KERNEL_PID_UNDEF) {
gnrc_pktsnip_t *netif = gnrc_netif_hdr_build(NULL, 0, NULL, 0);
gnrc_netif_hdr_t *netif_hdr;
if (netif == NULL) {
gnrc_pktbuf_release(pkt);
return -ENOMEM;
}
netif_hdr = netif->data;
netif_hdr->if_pid = iface;
LL_PREPEND(pkt, netif);
}
#ifdef MODULE_GNRC_NETERR
gnrc_neterr_reg(pkt); /* no error should occur since pkt was created here */
#endif
if (!gnrc_netapi_dispatch_send(type, GNRC_NETREG_DEMUX_CTX_ALL, pkt)) {
/* this should not happen, but just in case */
gnrc_pktbuf_release(pkt);
return -EBADMSG;
}
#ifdef MODULE_GNRC_NETERR
msg_t err_report;
err_report.type = 0;
while (err_report.type != GNRC_NETERR_MSG_TYPE) {
msg_try_receive(err_report);
if (err_report.type != GNRC_NETERR_MSG_TYPE) {
msg_try_send(err_report, sched_active_pid);
}
}
if (err_report.content.value != GNRC_NETERR_SUCCESS) {
return (int)(-err_report.content.value);
}
#endif
return payload_len;
}
/** @} */
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