lwip_icmp6.c File Reference

Send an icmpv6 'destination unreachable' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost.

Parameters:

p	the input packet for which the 'unreachable' should be sent, p->payload pointing to the IPv6 header
c	ICMPv6 code for the unreachable type

Definition at line 220 of file lwip_icmp6.c.

Process an input ICMPv6 message.

Called by ip6_input.

Will generate a reply for echo requests. Other messages are forwarded to nd6_input, or mld6_input.

Parameters:

p	the mld packet, p->payload pointing to the icmpv6 header
inp	the netif on which this packet was received

Definition at line 83 of file lwip_icmp6.c.

Send an icmpv6 'packet too big' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost.

Parameters:

p	the input packet for which the 'packet too big' should be sent, p->payload pointing to the IPv6 header
mtu	the maximum mtu that we can accept

Definition at line 236 of file lwip_icmp6.c.

Send an icmpv6 'parameter problem' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost and the calculated offset would be wrong (calculated against ip6_current_header()).

Parameters:

p	the input packet for which the 'param problem' should be sent, p->payload pointing to the IP header
c	ICMPv6 code for the param problem type
pointer	the pointer to the byte where the parameter is found

Definition at line 292 of file lwip_icmp6.c.

Send an ICMPv6 packet in response to an incoming packet.

The packet is sent *to* ip_current_src_addr() on ip_current_netif().

Parameters:

p	the input packet for which the response should be sent, p->payload pointing to the IPv6 header
code	Code of the ICMPv6 header
data	Additional 32-bit parameter in the ICMPv6 header
type	Type of the ICMPv6 header

Definition at line 309 of file lwip_icmp6.c.

Send an ICMPv6 packet in response to an incoming packet.

Call this function if the packet is NOT sent as a direct response to an incoming packet, but rather sometime later (e.g. for a fragment reassembly timeout). The caller must provide the zoned source and destination addresses from the original packet with the src_addr and dest_addr parameters. The reason for this approach is that while the addresses themselves are part of the original packet, their zone information is not, thus possibly resulting in a link-local response being sent over the wrong link.

Parameters:

p	the input packet for which the response should be sent, p->payload pointing to the IPv6 header
code	Code of the ICMPv6 header
data	Additional 32-bit parameter in the ICMPv6 header
type	Type of the ICMPv6 header
src_addr	original source address
dest_addr	original destination address

Definition at line 346 of file lwip_icmp6.c.

Send an ICMPv6 packet (with srd/dst address and netif given).

Parameters:

p	the input packet for which the response should be sent, p->payload pointing to the IPv6 header
code	Code of the ICMPv6 header
data	Additional 32-bit parameter in the ICMPv6 header
type	Type of the ICMPv6 header
reply_src	source address of the packet to send
reply_dest	destination address of the packet to send
netif	netif to send the packet

Definition at line 385 of file lwip_icmp6.c.

Send an icmpv6 'time exceeded' packet.

This function must be used only in direct response to a packet that is being received right now. Otherwise, address zones would be lost.

Parameters:

p	the input packet for which the 'time exceeded' should be sent, p->payload pointing to the IPv6 header
c	ICMPv6 code for the time exceeded type

Definition at line 252 of file lwip_icmp6.c.

Send an icmpv6 'time exceeded' packet, with explicit source and destination addresses.

This function may be used to send a response sometime after receiving the packet for which this response is meant. The provided source and destination addresses are used primarily to retain their zone information.

Parameters:

p	the input packet for which the 'time exceeded' should be sent, p->payload pointing to the IPv6 header
c	ICMPv6 code for the time exceeded type
src_addr	source address of the original packet, with zone information
dest_addr	destination address of the original packet, with zone information

Definition at line 273 of file lwip_icmp6.c.