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More flexibility for the fallback interface.

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When there's a failure to send a packet in the fallback interface the
destination is unreachable and therefore the source should be notified.
This commit is contained in:
lebrush 2013-05-15 12:01:38 +02:00 committed by Valentin Sawadski
parent aecb591d12
commit b3f6019924
2 changed files with 17 additions and 2 deletions
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11
core/net/ip/tcpip.c
View File

@ -586,7 +586,16 @@ tcpip_ipv6_output(void)
/* This should be copied from the ext header... */ /* This should be copied from the ext header... */
UIP_IP_BUF->proto = proto; UIP_IP_BUF->proto = proto;
} }
UIP_FALLBACK_INTERFACE.output(); /* Inform the other end that the destination is not reachable. If it's
* not informed routes might get lost unexpectedly until there's a need
* to send a new packet to the peer */
if(UIP_FALLBACK_INTERFACE.output() < 0) {
PRINTF("FALLBACK: output error. Reporting DST UNREACH\n");
uip_icmp6_error_output(ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR, 0);
uip_flags = 0;
tcpip_ipv6_output();
return;
}
#else #else
PRINTF("tcpip_ipv6_output: Destination off-link but no route\n"); PRINTF("tcpip_ipv6_output: Destination off-link but no route\n");
#endif /* !UIP_FALLBACK_INTERFACE */ #endif /* !UIP_FALLBACK_INTERFACE */

8
core/net/ip/uip.h
View File

@ -1429,7 +1429,13 @@ extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
struct uip_fallback_interface { struct uip_fallback_interface {
void (*init)(void); void (*init)(void);
void (*output)(void); /**
* \retval >=0
* in case of success
* \retval <0
* in case of failure
*/
int (*output)(void);
}; };
#if UIP_CONF_ICMP6 #if UIP_CONF_ICMP6