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6loWPAN: A little more IOB-related logic.

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This commit is contained in:
Gregory Nutt 2017-03-31 08:27:39 -06:00
parent 0427d6c726
commit c999519bf2
1 changed files with 48 additions and 9 deletions
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57
net/sixlowpan/sixlowpan_send.c
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@ -390,12 +390,12 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
(int)ieee->i_rime_hdrlen)
{
#if CONFIG_NET_6LOWPAN_FRAG
/* qhead will hold the generated frames; Subsequent frames will be
/* ieee->i_framelist will hold the generated frames; frames will be
* added at qtail.
*/
FAR struct iob_s *qhead;
FAR struct iob_s *qtail;
int verify;
/* The outbound IPv6 packet is too large to fit into a single 15.4
* packet, so we fragment it into multiple packets and send them.
@ -411,8 +411,19 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
iob = iob_alloc(false);
DEBUGASSERT(iob != NULL);
/* Initialize the IOB */
iob->io_flink = NULL;
iob->io_len = 0;
iob->io_offset = 0;
iob->io_pktlen = 0;
/* Create 1st Fragment */
# warning Missing logic
/* Add the frame header. */
verify = sixlowpan_hdrlen(ieee, ieee->i_panid);
DEBUGASSERT(vreify == framer_hdrlen);
UNUSED(verify);
/* Move HC1/HC06/IPv6 header */
# warning Missing logic
@ -433,9 +444,12 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
/* Add the first frame to the IOB queue */
qhead = iob;
qtail = iob;
iob->io_flink = NULL;
ieee->i_framelist = iob;
qtail = iob;
/* Keep track of the total amount of data queue */
iob->io_pktlen = iob->io_len;
/* Create following fragments
* Datagram tag is already in the buffer, we need to set the
@ -452,6 +466,13 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
iob = iob_alloc(false);
DEBUGASSERT(iob != NULL);
/* Initialize the IOB */
iob->io_flink = NULL;
iob->io_len = 0;
iob->io_offset = 0;
iob->io_pktlen = 0;
/* Copy payload */
# warning Missing logic
@ -461,7 +482,10 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
/* Add the next frame to the tail of the IOB queue */
qtail->io_flink = iob;
iob->io_flink = NULL;
/* Keep track of the total amount of data queue */
ieee->i_framelist->io_pktlen += iob->io_len;
/* Check tx result. */
# warning Missing logic
@ -469,7 +493,7 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
/* Send the list of frames */
return sixlowpan_send_frame(ieee, qhead);
return sixlowpan_send_frame(ieee, ieee->i_framelist);
#else
nerr("ERROR: Packet too large: %d\n", len);
nerr(" Cannot to be sent without fragmentation support\n");
@ -489,12 +513,27 @@ int sixlowpan_send(FAR struct net_driver_s *dev,
iob = iob_alloc(false);
DEBUGASSERT(iob != NULL);
/* Initialize the IOB */
iob->io_flink = NULL;
iob->io_len = 0;
iob->io_offset = 0;
iob->io_pktlen = 0;
/* Format the single frame */
# warning Missing logic
/* Send the single frame */
# warning Missing logic
/* Add the first frame to the IOB queue */
ieee->i_framelist = iob;
/* Keep track of the total amount of data queue */
iob->io_pktlen = iob->io_len;
iob->io_flink = NULL;
return sixlowpan_send_frame(ieee, iob);
}
}