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gnrc_netif_hdr: provide wrappers for gnrc_netif_ipv6_iid_from_addr() #10520

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Dec 7, 2018
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gnrc_netif_hdr: provide wrappers for gnrc_netif_ipv6_iid_from_addr() #10520

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61 changes: 61 additions & 0 deletions sys/include/net/gnrc/netif/hdr.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,11 @@
#ifndef NET_GNRC_NETIF_HDR_H
#define NET_GNRC_NETIF_HDR_H

#include <errno.h>
#include <string.h>
#include <stdint.h>

#include "net/gnrc/netif/internal.h"
#include "net/gnrc/pkt.h"
#include "net/gnrc/pktbuf.h"
#include "net/gnrc/netif.h"
Expand Down Expand Up @@ -197,6 +199,65 @@ static inline void gnrc_netif_hdr_set_dst_addr(gnrc_netif_hdr_t *hdr, uint8_t *a
memcpy(((uint8_t *)(hdr + 1)) + hdr->src_l2addr_len, addr, addr_len);
}

#if defined(MODULE_GNRC_IPV6) || defined(DOXYGEN)
/**
* @brief Converts the source address of a given @ref net_gnrc_netif_hdr to
* an IPv6 IID
*
* @note @p netif is intentionally required to be provided so that the caller
* needs to retrieve it from gnrc_netif_hdr_t::if_pid of @p hdr only
* once instead of this function retrieving it at every call.
*
* @pre `netif->pid == hdr->if_pid`
*
* @param[in] netif A network interface. gnrc_netif_t::pid must be equal to
* gnrc_netif_hdr_t::if_pid of @p hdr.
* @param[in] hdr Header to convert source address from.
* @param[out] iid The IID based on gnrc_netif_t::device_type.
*
* @return same as gnrc_netif_ipv6_iid_from_addr().
*/
static inline int gnrc_netif_hdr_ipv6_iid_from_src(const gnrc_netif_t *netif,
const gnrc_netif_hdr_t *hdr,
eui64_t *iid)
{
return gnrc_netif_ipv6_iid_from_addr(netif,
gnrc_netif_hdr_get_src_addr(hdr),
hdr->src_l2addr_len,
iid);
}

/**
* @brief Converts the destination address of a given @ref net_gnrc_netif_hdr
* to an IPv6 IID
*
* @note @p netif is intentionally required to be provided so that the caller
* needs to retrieve it from gnrc_netif_hdr_t::if_pid of @p hdr only
* once instead of this function retrieving it at every call.
*
* @pre `netif->pid == hdr->if_pid`
*
* @param[in] netif A network interface. gnrc_netif_t::pid must be equal to
* gnrc_netif_hdr_t::if_pid of @p hdr.
* @param[in] hdr Header to convert destination address from.
* @param[out] iid The IID based on gnrc_netif_t::device_type.
*
* @return same as gnrc_netif_ipv6_iid_from_addr().
*/
static inline int gnrc_netif_hdr_ipv6_iid_from_dst(const gnrc_netif_t *netif,
const gnrc_netif_hdr_t *hdr,
eui64_t *iid)
{
return gnrc_netif_ipv6_iid_from_addr(netif,
gnrc_netif_hdr_get_dst_addr(hdr),
hdr->dst_l2addr_len,
iid);
}
#else /* defined(MODULE_GNRC_IPV6) || defined(DOXYGEN) */
#define gnrc_netif_hdr_ipv6_iid_from_src(netif, hdr, iid) (-ENOTSUP);
#define gnrc_netif_hdr_ipv6_iid_from_dst(netif, hdr, iid) (-ENOTSUP);
#endif /* defined(MODULE_GNRC_IPV6) || defined(DOXYGEN) */

/**
* @brief Builds a generic network interface header for sending and
* adds it to the packet buffer.
Expand Down