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net/icmpv6/icmpv6_radvertise.c: Add option to manually specify router prefix

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This commit is contained in:
Sakari Kapanen 2017-11-08 07:47:41 -06:00 committed by Gregory Nutt
parent 07b98ccbb5
commit 795e884aea
2 changed files with 21 additions and 0 deletions
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11
net/icmpv6/Kconfig
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@ -93,6 +93,16 @@ config NET_ICMPv6_ROUTER
if NET_ICMPv6_ROUTER
config NET_ICMPv6_ROUTER_MANUAL
bool "Manual router prefix"
default n
---help---
Select this to set the advertised router prefix manually. Otherwise, it
will be derived from the device IPv6 address and prefix length set in
the netdev structure.
if NET_ICMPv6_ROUTER_MANUAL
config NET_ICMPv6_PREFLEN
int "Prefix length"
default 64
@ -178,6 +188,7 @@ config NET_ICMPv6_PREFIX_8
Advertisement message. This is the last of the 8-values. The
default for all eight values is fc00::0.
endif # NET_ICMPv6_ROUTER_MANUAL
endif # NET_ICMPv6_ROUTER
if NET_ICMPv6_SOCKET

10
net/icmpv6/icmpv6_radvertise.c
View File

@ -74,6 +74,7 @@
* Private Data
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_ROUTER_MANUAL
static const net_ipv6addr_t g_ipv6_prefix =
{
HTONS(CONFIG_NET_ICMPv6_PREFIX_1),
@ -85,6 +86,7 @@ static const net_ipv6addr_t g_ipv6_prefix =
HTONS(CONFIG_NET_ICMPv6_PREFIX_7),
HTONS(CONFIG_NET_ICMPv6_PREFIX_8)
};
#endif /* CONFIG_NET_ICMPv6_ROUTER_MANUAL */
/****************************************************************************
* Private Functions
@ -106,6 +108,7 @@ static const net_ipv6addr_t g_ipv6_prefix =
*
****************************************************************************/
#ifndef CONFIG_NET_ICMPv6_ROUTER_MANUAL
static inline void ipv6addr_mask(FAR uint16_t *dest, FAR const uint16_t *src,
FAR const uint16_t *mask)
{
@ -116,6 +119,7 @@ static inline void ipv6addr_mask(FAR uint16_t *dest, FAR const uint16_t *src,
dest[i] = src[i] & mask[i];
}
}
#endif /* !CONFIG_NET_ICMPv6_ROUTER_MANUAL */
/****************************************************************************
* Public Functions
@ -219,10 +223,16 @@ void icmpv6_radvertise(FAR struct net_driver_s *dev)
prefix->reserved[0] = 0;
prefix->reserved[1] = 0;
#ifdef CONFIG_NET_ICMPv6_ROUTER_MANUAL
/* Copy the configured prefex */
net_ipv6addr_copy(prefix->prefix, g_ipv6_prefix);
#else
/* Set the prefix and prefix length based on net driver IP and netmask */
prefix->preflen = net_ipv6_mask2pref(dev->d_ipv6netmask);
ipv6addr_mask(prefix->prefix, dev->d_ipv6addr, dev->d_ipv6netmask);
#endif /* CONFIG_NET_ICMPv6_ROUTER_MANUAL */
/* Calculate the checksum over both the ICMP header and payload */