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net: udp: Do not mark the packet to be dropped if received ok

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If the udp packet was successfully delivered to the application,
and if the application did not want to send anything back to
sender, then then uip_slen(buf) will be 0.
In this case we MUST NOT set uip_len(buf) to 0 as that would
cause the net_buf to be released by RX fiber. In this case it is
application responsibility to release the buffer.

Change-Id: I43cf9b147a45294288dc3c631908b034e1a4ab6a
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2015-06-04 15:34:20 +03:00 • committed by Anas Nashif
commit 63512ac2f3
1 changed files with 8 additions and 0 deletions
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8
net/ip/contiki/ipv6/uip6.c
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@ -1558,6 +1558,14 @@ uip_process(struct net_buf *buf, uint8_t flag)
uip_sappdata(buf) = uip_appdata(buf) = &uip_buf(buf)[UIP_IPUDPH_LEN + UIP_LLH_LEN];
uip_slen(buf) = 0;
UIP_UDP_APPCALL(buf);
if(uip_slen(buf) == 0) {
/* If the application does not want to send anything, then uip_slen(buf)
* will be 0. In this case we MUST NOT set uip_len(buf) to 0 as that would
* cause the net_buf to be released by rx fiber. In this case it is
* application responsibility to release the buffer.
*/
return 0;
}
udp_send:
PRINTF("In udp_send\n");