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Added RST-MID matching for observing.

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This commit is contained in:
Matthias Kovatsch 2012-02-01 03:58:35 +01:00
parent e4c506820d
commit c1aa211dc7
3 changed files with 28 additions and 2 deletions
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4
apps/er-coap-07/er-coap-07-engine.c
View file

@ -225,8 +225,8 @@ handle_incoming_data(void)
/* Cancel possible subscriptions. */
if (IS_OPTION(message, COAP_OPTION_TOKEN))
{
/* RST must be empty, so it is a full client reset. */
coap_remove_observer_by_client(&UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport);
/* Erbium stores last MID for each observer. */
coap_remove_observer_by_mid(&UIP_IP_BUF->srcipaddr, UIP_UDP_BUF->srcport, message->mid);
}
}

24
apps/er-coap-07/er-coap-07-observing.c
View file

@ -69,6 +69,7 @@ coap_add_observer(uip_ipaddr_t *addr, uint16_t port, const uint8_t *token, size_
o->port = port;
o->token_len = token_len;
memcpy(o->token, token, token_len);
o->last_mid = 0;
stimer_set(&o->refresh_timer, COAP_OBSERVING_REFRESH_INTERVAL);
@ -107,6 +108,7 @@ coap_remove_observer_by_client(uip_ipaddr_t *addr, uint16_t port)
}
return removed;
}
int
coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, uint8_t *token, size_t token_len)
{
@ -124,6 +126,7 @@ coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, uint8_t *token,
}
return removed;
}
int
coap_remove_observer_by_url(uip_ipaddr_t *addr, uint16_t port, const char *url)
{
@ -141,6 +144,24 @@ coap_remove_observer_by_url(uip_ipaddr_t *addr, uint16_t port, const char *url)
}
return removed;
}
int
coap_remove_observer_by_mid(uip_ipaddr_t *addr, uint16_t port, uint16_t mid)
{
int removed = 0;
coap_observer_t* obs = NULL;
for (obs = (coap_observer_t*)list_head(observers_list); obs; obs = obs->next)
{
PRINTF("Remove check URL %p\n", url);
if (uip_ipaddr_cmp(&obs->addr, addr) && obs->port==port && obs->last_mid==mid)
{
coap_remove_observer(obs);
removed++;
}
}
return removed;
}
/*-----------------------------------------------------------------------------------*/
void
coap_notify_observers(const char *url, int type, uint32_t observe, uint8_t *payload, size_t payload_len)
@ -177,6 +198,9 @@ coap_notify_observers(const char *url, int type, uint32_t observe, uint8_t *payl
PRINTF(":%u\n", obs->port);
PRINTF(" %.*s\n", payload_len, payload);
/* Update last MID for RST matching. */
obs->last_mid = transaction->mid;
coap_send_transaction(transaction);
}
}

2
apps/er-coap-07/er-coap-07-observing.h
View file

@ -61,6 +61,7 @@ typedef struct coap_observer {
uint16_t port;
uint8_t token_len;
uint8_t token[COAP_TOKEN_LEN];
uint16_t last_mid;
struct stimer refresh_timer;
} coap_observer_t;
@ -72,6 +73,7 @@ void coap_remove_observer(coap_observer_t *o);
int coap_remove_observer_by_client(uip_ipaddr_t *addr, uint16_t port);
int coap_remove_observer_by_token(uip_ipaddr_t *addr, uint16_t port, uint8_t *token, size_t token_len);
int coap_remove_observer_by_url(uip_ipaddr_t *addr, uint16_t port, const char *url);
int coap_remove_observer_by_mid(uip_ipaddr_t *addr, uint16_t port, uint16_t mid);
void coap_notify_observers(const char *url, int type, uint32_t observe, uint8_t *payload, size_t payload_len);