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Merge pull request #650 from cetic/pr-rpl-hbh-fixes

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Fix for RPL Hop-by-Hop options
This commit is contained in:
Nicolas Tsiftes 2014-06-27 14:43:00 +02:00
commit 782de873e4
2 changed files with 36 additions and 18 deletions
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9
core/net/ipv6/uip6.c
View file

@ -1547,10 +1547,6 @@ uip_process(uint8_t flag)
uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPTCPH_LEN];
#if UIP_CONF_IPV6_RPL
rpl_insert_header();
#endif /* UIP_CONF_IPV6_RPL */
#if UIP_UDP_CHECKSUMS
/* Calculate UDP checksum. */
UIP_UDP_BUF->udpchksum = ~(uip_udpchksum());
@ -1558,6 +1554,11 @@ uip_process(uint8_t flag)
UIP_UDP_BUF->udpchksum = 0xffff;
}
#endif /* UIP_UDP_CHECKSUMS */
#if UIP_CONF_IPV6_RPL
rpl_insert_header();
#endif /* UIP_CONF_IPV6_RPL */
UIP_STAT(++uip_stat.udp.sent);
goto ip_send_nolen;
#endif /* UIP_UDP */

43
core/net/rpl/rpl-ext-header.c
View file

@ -68,9 +68,20 @@ rpl_verify_header(int uip_ext_opt_offset)
{
rpl_instance_t *instance;
int down;
uint16_t sender_rank;
uint8_t sender_closer;
uip_ds6_route_t *route;
if(UIP_HBHO_BUF->len != RPL_HOP_BY_HOP_LEN - 8) {
PRINTF("RPL: Hop-by-hop extension header has wrong size\n");
return 1;
}
if(UIP_EXT_HDR_OPT_RPL_BUF->opt_type != UIP_EXT_HDR_OPT_RPL) {
PRINTF("RPL: Non RPL Hop-by-hop option\n");
return 1;
}
if(UIP_EXT_HDR_OPT_RPL_BUF->opt_len != RPL_HDR_OPT_LEN) {
PRINTF("RPL: Bad header option! (wrong length)\n");
return 1;
@ -117,17 +128,18 @@ rpl_verify_header(int uip_ext_opt_offset)
down = 1;
}
sender_closer = UIP_EXT_HDR_OPT_RPL_BUF->senderrank < instance->current_dag->rank;
sender_rank = UIP_HTONS(UIP_EXT_HDR_OPT_RPL_BUF->senderrank);
sender_closer = sender_rank < instance->current_dag->rank;
PRINTF("RPL: Packet going %s, sender closer %d (%d < %d)\n", down == 1 ? "down" : "up",
sender_closer,
UIP_EXT_HDR_OPT_RPL_BUF->senderrank,
sender_rank,
instance->current_dag->rank
);
if((down && !sender_closer) || (!down && sender_closer)) {
PRINTF("RPL: Loop detected - senderrank: %d my-rank: %d sender_closer: %d\n",
UIP_EXT_HDR_OPT_RPL_BUF->senderrank, instance->current_dag->rank,
sender_rank, instance->current_dag->rank,
sender_closer);
if(UIP_EXT_HDR_OPT_RPL_BUF->flags & RPL_HDR_OPT_RANK_ERR) {
PRINTF("RPL: Rank error signalled in RPL option!\n");
@ -185,7 +197,17 @@ rpl_update_header_empty(void)
switch(UIP_IP_BUF->proto) {
case UIP_PROTO_HBHO:
if(UIP_HBHO_BUF->len != RPL_HOP_BY_HOP_LEN - 8) {
PRINTF("RPL: Non RPL Hop-by-hop options support not implemented\n");
PRINTF("RPL: Hop-by-hop extension header has wrong size\n");
uip_ext_len = last_uip_ext_len;
return;
}
if(UIP_EXT_HDR_OPT_RPL_BUF->opt_type != UIP_EXT_HDR_OPT_RPL) {
PRINTF("RPL: Non RPL Hop-by-hop option support not implemented\n");
uip_ext_len = last_uip_ext_len;
return;
}
if(UIP_EXT_HDR_OPT_RPL_BUF->opt_len != RPL_HDR_OPT_LEN) {
PRINTF("RPL: RPL Hop-by-hop option has wrong length\n");
uip_ext_len = last_uip_ext_len;
return;
}
@ -210,7 +232,7 @@ rpl_update_header_empty(void)
switch(UIP_EXT_HDR_OPT_BUF->type) {
case UIP_EXT_HDR_OPT_RPL:
PRINTF("RPL: Updating RPL option\n");
UIP_EXT_HDR_OPT_RPL_BUF->senderrank = instance->current_dag->rank;
UIP_EXT_HDR_OPT_RPL_BUF->senderrank = UIP_HTONS(instance->current_dag->rank);
/* Check the direction of the down flag, as per Section 11.2.2.3,
which states that if a packet is going down it should in
@ -276,8 +298,7 @@ rpl_update_header_final(uip_ipaddr_t *addr)
UIP_EXT_HDR_OPT_RPL_BUF->flags = RPL_HDR_OPT_DOWN;
}
UIP_EXT_HDR_OPT_RPL_BUF->instance = default_instance->instance_id;
UIP_EXT_HDR_OPT_RPL_BUF->senderrank = default_instance->current_dag->rank;
uip_ext_len = last_uip_ext_len;
UIP_EXT_HDR_OPT_RPL_BUF->senderrank = UIP_HTONS(default_instance->current_dag->rank);
}
}
}
@ -334,7 +355,7 @@ rpl_invert_header(void)
PRINTF("RPL: Updating RPL option (switching direction)\n");
UIP_EXT_HDR_OPT_RPL_BUF->flags &= RPL_HDR_OPT_DOWN;
UIP_EXT_HDR_OPT_RPL_BUF->flags ^= RPL_HDR_OPT_DOWN;
UIP_EXT_HDR_OPT_RPL_BUF->senderrank = rpl_get_instance(UIP_EXT_HDR_OPT_RPL_BUF->instance)->current_dag->rank;
UIP_EXT_HDR_OPT_RPL_BUF->senderrank = UIP_HTONS(rpl_get_instance(UIP_EXT_HDR_OPT_RPL_BUF->instance)->current_dag->rank);
uip_ext_len = last_uip_ext_len;
return RPL_HOP_BY_HOP_LEN;
default:
@ -347,14 +368,10 @@ rpl_invert_header(void)
void
rpl_insert_header(void)
{
uint8_t uip_ext_opt_offset;
if(default_instance != NULL) {
uip_ext_opt_offset = 2;
if(UIP_EXT_HDR_OPT_BUF->type == UIP_EXT_HDR_OPT_RPL) {
if(default_instance != NULL && !uip_is_addr_mcast(&UIP_IP_BUF->destipaddr)) {
rpl_update_header_empty();
}
}
}
/*---------------------------------------------------------------------------*/
#endif /* UIP_CONF_IPV6 */