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Add a handler for ICMP Destination Unreachable #2544

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Add a handler for ICMP Destination Unreachable #2544

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bdb9130
[ICMPv6] Handle Destination Unreachable messages
audeoudh Jan 24, 2018
5e74130
[ICMPv6] Use general debug macros & functions
audeoudh Jan 24, 2018
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[ICMPv6] Handle Destination Unreachable messages 
Nodes was already able to send Destination Unreachable messages, but was
not able to parse them.

If DEBUG is true in `core/net/ipv6/uip-icmp6.c`, then a message is
printed on the serial line.
@audeoudh
audeoudh committed Dec 5, 2018
commit bdb9130ecd86f50a800d76760ca2c0aacaf8ca1a
34 changes: 34 additions & 0 deletions core/net/ipv6/uip-icmp6.c
View file
Original file line number Diff line number Diff line change
@@ -361,18 +361,52 @@ uip_icmp6_echo_reply_callback_rm(struct uip_icmp6_echo_reply_notification *n)
{
list_remove(echo_reply_callback_list, n);
}

/*---------------------------------------------------------------------------*/
static void
destination_unreachable_input(void)
{
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(": destination unreachable (");
switch(UIP_ICMP_BUF->icode) {
case ICMP6_DST_UNREACH_NOROUTE:
PRINTF("no route to destination");
break;
case ICMP6_DST_UNREACH_ADMIN:
PRINTF("communication with destination administratively prohibited");
break;
case ICMP6_DST_UNREACH_BEYONDSCOPE:
PRINTF("beyond scope of source address");
break;
case ICMP6_DST_UNREACH_ADDR:
PRINTF("address unreachable");
break;
case ICMP6_DST_UNREACH_NOPORT:
PRINTF("port unreachable");
break;
default:
printf("unknown reason code");
}
PRINTF(")\n");

return;
}

/*---------------------------------------------------------------------------*/
UIP_ICMP6_HANDLER(echo_request_handler, ICMP6_ECHO_REQUEST,
UIP_ICMP6_HANDLER_CODE_ANY, echo_request_input);
UIP_ICMP6_HANDLER(echo_reply_handler, ICMP6_ECHO_REPLY,
UIP_ICMP6_HANDLER_CODE_ANY, echo_reply_input);
UIP_ICMP6_HANDLER(destination_unreachable_handler, ICMP6_DST_UNREACH,
UIP_ICMP6_HANDLER_CODE_ANY, destination_unreachable_input);
/*---------------------------------------------------------------------------*/
void
uip_icmp6_init()
{
/* Register Echo Request and Reply handlers */
uip_icmp6_register_input_handler(&echo_request_handler);
uip_icmp6_register_input_handler(&echo_reply_handler);
uip_icmp6_register_input_handler(&destination_unreachable_handler);
}
/*---------------------------------------------------------------------------*/
/** @} */