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gnrc_netif: make auto-config of compression context optional #17678

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merged 1 commit into from
May 24, 2022
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gnrc_netif: make auto-config of compression context optional #17678

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10 changes: 10 additions & 0 deletions sys/include/net/gnrc/netif/conf.h
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Original file line number Diff line number Diff line change
Expand Up @@ -194,6 +194,16 @@ extern "C" {
#define CONFIG_GNRC_NETIF_NONSTANDARD_6LO_MTU 0
#endif

/**
* @brief Automatically add 6LoWPAN compression at border router
*
* When set, 6LoWPAN compression context 0 will be automatically set for the prefix configured by
* prefix deligation at the border router.
*/
#ifndef CONFIG_GNRC_NETIF_IPV6_BR_AUTO_6CTX
#define CONFIG_GNRC_NETIF_IPV6_BR_AUTO_6CTX 1
#endif

#ifdef __cplusplus
}
#endif
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7 changes: 7 additions & 0 deletions sys/net/gnrc/netif/Kconfig
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Expand Up @@ -74,5 +74,12 @@ config GNRC_NETIF_LORAWAN_NETIF_HDR
GNRC LoRaWAN packets will include the GNRC Netif
header. Therefore this parameter will be removed

config GNRC_NETIF_IPV6_BR_AUTO_6CTX
bool "Automatically add 6LoWPAN compression at border router"
default y
depends on USEMODULE_GNRC_IPV6_NIB_6LBR && USEMODULE_GNRC_SIXLOWPAN_IPHC && USEMODULE_GNRC_SIXLOWPAN_CTX
help
When set, 6LoWPAN compression context 0 will be automatically set for the prefix configured
by prefix deligation at the border router.

endif # KCONFIG_USEMODULE_GNRC_NETIF
10 changes: 6 additions & 4 deletions sys/net/gnrc/netif/gnrc_netif.c
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Expand Up @@ -1287,10 +1287,12 @@ int gnrc_netif_ipv6_add_prefix(gnrc_netif_t *netif,
IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C) &&
gnrc_netif_is_6ln(netif)) {

/* configure compression context */
if (gnrc_sixlowpan_ctx_update_6ctx(pfx, pfx_len, valid)) {
DEBUG("gnrc_netif: add compression context for prefix %s/%u\n",
ipv6_addr_to_str(addr_str, pfx, sizeof(addr_str)), pfx_len);
if (IS_ACTIVE(CONFIG_GNRC_NETIF_IPV6_BR_AUTO_6CTX)) {
/* configure compression context */
if (gnrc_sixlowpan_ctx_update_6ctx(pfx, pfx_len, valid)) {
DEBUG("gnrc_netif: add compression context for prefix %s/%u\n",
ipv6_addr_to_str(addr_str, pfx, sizeof(addr_str)), pfx_len);
}
}

(void)gnrc_ipv6_nib_abr_add(&addr);
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