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Fix TC/FL errors in hc-06. Need to verify further

This commit is contained in:
c_oflynn 2010-03-09 16:19:44 +00:00
parent 48a9bff889
commit dc3e6c1877
1 changed files with 38 additions and 38 deletions
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76
core/net/sicslowpan.c
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@ -32,7 +32,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: sicslowpan.c,v 1.22 2010/03/09 15:18:03 c_oflynn Exp $
* $Id: sicslowpan.c,v 1.23 2010/03/09 16:19:44 c_oflynn Exp $
*/
/**
* \file
@ -51,8 +51,7 @@
* -Add compression options to UDP, currently only supports
* both ports compressed or both ports elided
*
* -Fix traffic class/flow/ECN/DCSP processing, doesn't work
* per hc-06
* -Verify TC/FL compression works
*
* -Add stateless multicast option
*/
@ -636,43 +635,44 @@ uncompress_hdr_hc06(u16_t ip_len) {
}
/* Traffic class and flow label */
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_FL_C) == 0) {
/* Flow label are carried inline */
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_TC_C) == 0) {
/* Traffic class is carried inline */
memcpy(&SICSLOWPAN_IP_BUF->vtc, hc06_ptr + 1, 3);
tmp = *hc06_ptr;
hc06_ptr += 4;
/* hc06 format of tc is ECN | DSCP , original is DSCP | ECN */
/* set version, pick highest DSCP bits and set in vtc */
UIP_IP_BUF->vtc = 0x60 | ((tmp >> 2) & 0x0f);
/* ECN rolled down two steps + lowest DSCP bits at top two bits */
UIP_IP_BUF->tcflow = ((tmp >> 2) & 0x30) | (tmp << 6) |
(UIP_IP_BUF->tcflow & 0x0f);
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_FL_C) == 0) {
/* Flow label are carried inline */
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_TC_C) == 0) {
/* Traffic class is carried inline */
memcpy(&SICSLOWPAN_IP_BUF->tcflow, hc06_ptr + 1, 3);
tmp = *hc06_ptr;
hc06_ptr += 4;
/* hc06 format of tc is ECN | DSCP , original is DSCP | ECN */
/* set version, pick highest DSCP bits and set in vtc */
SICSLOWPAN_IP_BUF->vtc = 0x60 | ((tmp >> 2) & 0x0f);
/* ECN rolled down two steps + lowest DSCP bits at top two bits */
SICSLOWPAN_IP_BUF->tcflow = ((tmp >> 2) & 0x30) | (tmp << 6) |
(SICSLOWPAN_IP_BUF->tcflow & 0x0f);
} else {
/* Traffic class is compressed (set version and no TC)*/
SICSLOWPAN_IP_BUF->vtc = 0x60;
/* highest flow label bits + ECN bits */
SICSLOWPAN_IP_BUF->tcflow = (*hc06_ptr & 0x0F) |
((*hc06_ptr >> 2) & 0x30);
memcpy(&SICSLOWPAN_IP_BUF->flow, hc06_ptr + 1, 2);
hc06_ptr += 3;
}
} else {
/* Traffic class is compressed (set version and no TC)*/
SICSLOWPAN_IP_BUF->vtc = 0x60;
/* highest flow label bits + ECN bits */
SICSLOWPAN_IP_BUF->tcflow = (*hc06_ptr & 0x0F) |
((*hc06_ptr >> 2) & 0x30);
memcpy(&SICSLOWPAN_IP_BUF->flow, hc06_ptr + 1, 2);
hc06_ptr += 3;
/* Version is always 6! */
/* Version and flow label are compressed */
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_TC_C) == 0) {
/* Traffic class is inline */
SICSLOWPAN_IP_BUF->vtc = 0x60 | ((*hc06_ptr >> 2) & 0x0f);
SICSLOWPAN_IP_BUF->tcflow = ((*hc06_ptr << 6) & 0xC0) | ((*hc06_ptr >> 2) & 0x30);
SICSLOWPAN_IP_BUF->flow = 0;
hc06_ptr += 3;
} else {
/* Traffic class is compressed */
SICSLOWPAN_IP_BUF->vtc = 0x60;
SICSLOWPAN_IP_BUF->tcflow = 0;
SICSLOWPAN_IP_BUF->flow = 0;
}
}
} else {
/* Version is always 6! */
/* Version and flow label are compressed */
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_TC_C) == 0) {
/* Traffic class is inline */
SICSLOWPAN_IP_BUF->vtc = 0x60 | ((*hc06_ptr >> 2) & 0x0f);
SICSLOWPAN_IP_BUF->tcflow = ((*hc06_ptr >> 2) | (*hc06_ptr << 6)) & 0xf0;
hc06_ptr += 1;
} else {
/* Traffic class is compressed */
SICSLOWPAN_IP_BUF->vtc = 0x60;
SICSLOWPAN_IP_BUF->tcflow = 0;
}
SICSLOWPAN_IP_BUF->flow = 0;
}
/* Next Header */
if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_NH_C) == 0) {