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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 the udp interface defined by net/gnrc/udp.h
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#include <errno.h>
#include "net/af.h"
#include "net/gnrc/conn.h"
#include "net/gnrc/ipv6.h"
#include "net/gnrc/udp.h"
#include "net/conn/udp.h"
int conn_udp_create(conn_udp_t *conn, const void *addr, size_t addr_len,
int family, uint16_t port)
{
conn->l4_type = GNRC_NETTYPE_UDP;
switch (family) {
#ifdef MODULE_GNRC_IPV6
case AF_INET6:
if (addr_len != sizeof(ipv6_addr_t)) {
return -EINVAL;
}
if (gnrc_conn6_set_local_addr(conn->local_addr, addr)) {
conn->l3_type = GNRC_NETTYPE_IPV6;
conn->local_addr_len = addr_len;
conn_udp_close(conn); /* unregister possibly registered netreg entry */
gnrc_conn_reg(&conn->netreg_entry, conn->l4_type, (uint32_t)port);
}
else {
return -EADDRNOTAVAIL;
}
break;
#endif
default:
(void)addr;
(void)addr_len;
(void)port;
return -EAFNOSUPPORT;
}
return 0;
}
void conn_udp_close(conn_udp_t *conn)
{
assert(conn->l4_type == GNRC_NETTYPE_UDP);
if (conn->netreg_entry.target.pid != KERNEL_PID_UNDEF) {
gnrc_netreg_unregister(GNRC_NETTYPE_UDP, &conn->netreg_entry);
conn->netreg_entry.target.pid = KERNEL_PID_UNDEF;
}
}
int conn_udp_getlocaladdr(conn_udp_t *conn, void *addr, uint16_t *port)
{
assert(conn->l4_type == GNRC_NETTYPE_UDP);
memcpy(addr, &conn->local_addr, conn->local_addr_len);
*port = (uint16_t)conn->netreg_entry.demux_ctx;
return conn->local_addr_len;
}
int conn_udp_recvfrom(conn_udp_t *conn, void *data, size_t max_len, void *addr, size_t *addr_len,
uint16_t *port)
{
assert(conn->l4_type == GNRC_NETTYPE_UDP);
switch (conn->l3_type) {
#ifdef MODULE_GNRC_IPV6
case GNRC_NETTYPE_IPV6:
return gnrc_conn_recvfrom((conn_t *)conn, data, max_len, addr, addr_len, port);
#endif
default:
(void)data;
(void)max_len;
(void)addr;
(void)addr_len;
(void)port;
return -EBADF;
}
}
int conn_udp_sendto(const void *data, size_t len, const void *src, size_t src_len,
const void *dst, size_t dst_len, int family, uint16_t sport,
uint16_t dport)
{
gnrc_pktsnip_t *pkt, *hdr = NULL;
pkt = gnrc_pktbuf_add(NULL, (void *)data, len, GNRC_NETTYPE_UNDEF); /* data will only be copied */
hdr = gnrc_udp_hdr_build(pkt, sport, dport);
if (hdr == NULL) {
gnrc_pktbuf_release(pkt);
return -ENOMEM;
}
pkt = hdr;
switch (family) {
#ifdef MODULE_GNRC_IPV6
case AF_INET6:
if (((src != NULL) && (src_len != sizeof(ipv6_addr_t))) ||
(dst_len != sizeof(ipv6_addr_t))) {
gnrc_pktbuf_release(pkt);
return -EINVAL;
}
/* addr will only be copied */
hdr = gnrc_ipv6_hdr_build(pkt, src, dst);
if (hdr == NULL) {
gnrc_pktbuf_release(pkt);
return -ENOMEM;
}
pkt = hdr;
break;
#endif /* MODULE_GNRC_IPV6 */
default:
(void)hdr;
(void)src;
(void)src_len;
(void)dst;
(void)dst_len;
gnrc_pktbuf_release(pkt);
return -EAFNOSUPPORT;
}
gnrc_netapi_dispatch_send(GNRC_NETTYPE_UDP, GNRC_NETREG_DEMUX_CTX_ALL, pkt);
return len;
}
/** @} */
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