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ICMPv6 Neighbor Advertisement: Need to set O flag or response is not used. Also, TTL=255 seems to be more-or-less standard in this message

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This commit is contained in:
Gregory Nutt 2015-01-21 08:37:23 -06:00
parent 2653b412c9
commit 4498bf9f5b
1 changed files with 12 additions and 11 deletions
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23
net/icmpv6/icmpv6_input.c
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@ -139,7 +139,8 @@ void icmpv6_input(FAR struct net_driver_s *dev)
* of neighbors.
*
* Missing checks:
* optlen = 1 (8 octets)
* optlen = 1 (8 octets)i
* Should only update Neighbor Table if [O]verride bit is set in flags
*/
sol = ICMPv6SOLICIT;
@ -159,17 +160,17 @@ void icmpv6_input(FAR struct net_driver_s *dev)
/* Set up the IPv6 header (most is probably already in place) */
icmp->vtc = 0x60; /* Version/traffic class (MS) */
icmp->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
icmp->flow = 0; /* Flow label (LS) */
icmp->vtc = 0x60; /* Version/traffic class (MS) */
icmp->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
icmp->flow = 0; /* Flow label (LS) */
/* Length excludes the IPv6 header */
icmp->len[0] = (sizeof(struct icmpv6_neighbor_advertise_s) >> 8);
icmp->len[1] = (sizeof(struct icmpv6_neighbor_advertise_s) & 0xff);
icmp->proto = IP_PROTO_ICMP6; /* Next header */
icmp->ttl = IP_TTL; /* Hop limit */
icmp->proto = IP_PROTO_ICMP6; /* Next header */
icmp->ttl = 255; /* Hop limit */
/* Swap source for destination IP address, add our source IP
* address
@ -181,14 +182,14 @@ void icmpv6_input(FAR struct net_driver_s *dev)
/* Set up the ICMPv6 Neighbor Advertise response */
adv = ICMPv6ADVERTISE;
adv->type = ICMPv6_NEIGHBOR_ADVERTISE; /* Message type */
adv->code = 0; /* Message qualifier */
adv->flags[0] = ICMPv6_FLAG_S; /* Solicited flag. */
adv->type = ICMPv6_NEIGHBOR_ADVERTISE; /* Message type */
adv->code = 0; /* Message qualifier */
adv->flags[0] = ICMPv6_FLAG_S | ICMPv6_FLAG_O; /* Solicited+Override flags. */
adv->flags[1] = 0;
adv->flags[2] = 0;
adv->flags[3] = 0;
adv->opttype = ICMPv6_OPT_TGTLLADDR; /* Option type */
adv->optlen = 1; /* Option length = 1 octet */
adv->opttype = ICMPv6_OPT_TGTLLADDR; /* Option type */
adv->optlen = 1; /* Option length = 1 octet */
/* Copy our link layer address into the message
* REVISIT: What if the link layer is not Ethernet?