More flexibility for the fallback interface.
When there's a failure to send a packet in the fallback interface the destination is unreachable and therefore the source should be notified.
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@ -586,7 +586,16 @@ tcpip_ipv6_output(void)
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/* This should be copied from the ext header... */
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UIP_IP_BUF->proto = proto;
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}
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UIP_FALLBACK_INTERFACE.output();
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/* Inform the other end that the destination is not reachable. If it's
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* not informed routes might get lost unexpectedly until there's a need
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* to send a new packet to the peer */
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if(UIP_FALLBACK_INTERFACE.output() < 0) {
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PRINTF("FALLBACK: output error. Reporting DST UNREACH\n");
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uip_icmp6_error_output(ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR, 0);
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uip_flags = 0;
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tcpip_ipv6_output();
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return;
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}
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#else
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PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
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#endif /* !UIP_FALLBACK_INTERFACE */
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@ -1429,7 +1429,13 @@ extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
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struct uip_fallback_interface {
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void (*init)(void);
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void (*output)(void);
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/**
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* \retval >=0
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* in case of success
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* \retval <0
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* in case of failure
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*/
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int (*output)(void);
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};
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#if UIP_CONF_ICMP6
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