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added support for all UDP port compressions in hc06
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joxe
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@ -32,7 +32,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: sicslowpan.c,v 1.32 2010/03/19 12:54:38 nifi Exp $
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* $Id: sicslowpan.c,v 1.33 2010/03/26 10:28:52 joxe Exp $
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*/
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/**
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* \file
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@ -44,6 +44,7 @@
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* \author Mathilde Durvy <mdurvy@cisco.com>
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* \author Julien Abeille <jabeille@cisco.com>
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* \author Joakim Eriksson <joakime@sics.se>
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* \author Joel Hoglund <joel@sics.se>
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*/
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/**
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@ -607,31 +608,54 @@ compress_hdr_hc06(rimeaddr_t *rime_destaddr)
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}
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}
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uncomp_hdr_len = UIP_IPH_LEN;
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#if UIP_CONF_UDP
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/* UDP header compression */
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if(UIP_IP_BUF->proto == UIP_PROTO_UDP) {
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if(HTONS(UIP_UDP_BUF->srcport) >= SICSLOWPAN_UDP_PORT_MIN &&
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HTONS(UIP_UDP_BUF->srcport) < SICSLOWPAN_UDP_PORT_MAX &&
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HTONS(UIP_UDP_BUF->destport) >= SICSLOWPAN_UDP_PORT_MIN &&
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HTONS(UIP_UDP_BUF->destport) < SICSLOWPAN_UDP_PORT_MAX) {
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/* we can compress. Copy compressed ports, full chcksum */
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*hc06_ptr = SICSLOWPAN_NHC_UDP_C;
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PRINTF("IPHC: Uncompressed UDP ports on send side: %x, %x\n",
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HTONS(UIP_UDP_BUF->srcport), HTONS(UIP_UDP_BUF->destport));
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/* Mask out the last 4 bits can be used as a mask */
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if(((HTONS(UIP_UDP_BUF->srcport) & 0xfff0) == SICSLOWPAN_UDP_4_BIT_PORT_MIN) &&
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((HTONS(UIP_UDP_BUF->destport) & 0xfff0) == SICSLOWPAN_UDP_4_BIT_PORT_MIN)) {
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/* we can compress 12 bits of both source and dest */
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*hc06_ptr = SICSLOWPAN_NHC_UDP_CS_P_11;
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PRINTF("IPHC: remove 12 b of both source & dest with prefix 0xFOB\n");
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*(hc06_ptr + 1) =
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(u8_t)((HTONS(UIP_UDP_BUF->srcport) -
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SICSLOWPAN_UDP_PORT_MIN) << 4) +
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(u8_t)((HTONS(UIP_UDP_BUF->destport) -
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SICSLOWPAN_UDP_PORT_MIN));
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memcpy(hc06_ptr + 2, &UIP_UDP_BUF->udpchksum, 2);
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(u8_t)((HTONS(UIP_UDP_BUF->srcport) -
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SICSLOWPAN_UDP_4_BIT_PORT_MIN) << 4) +
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(u8_t)((HTONS(UIP_UDP_BUF->destport) -
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SICSLOWPAN_UDP_4_BIT_PORT_MIN));
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hc06_ptr += 2;
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} else if((HTONS(UIP_UDP_BUF->destport) & 0xff00) == SICSLOWPAN_UDP_8_BIT_PORT_MIN) {
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/* we can compress 8 bits of dest, leave source. */
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*hc06_ptr = SICSLOWPAN_NHC_UDP_CS_P_01;
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PRINTF("IPHC: leave source, remove 8 bits of dest with prefix 0xF0\n");
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memcpy(hc06_ptr + 1, &UIP_UDP_BUF->srcport, 2);
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*(hc06_ptr + 3) =
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(u8_t)((HTONS(UIP_UDP_BUF->destport) -
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SICSLOWPAN_UDP_8_BIT_PORT_MIN));
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hc06_ptr += 4;
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} else if((HTONS(UIP_UDP_BUF->srcport) & 0xff00) == SICSLOWPAN_UDP_8_BIT_PORT_MIN) {
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/* we can compress 8 bits of src, leave dest. Copy compressed port */
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*hc06_ptr = SICSLOWPAN_NHC_UDP_CS_P_10;
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PRINTF("IPHC: remove 8 bits of source with prefix 0xF0, leave dest. hch: %i\n", *hc06_ptr);
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*(hc06_ptr + 1) =
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(u8_t)((HTONS(UIP_UDP_BUF->srcport) -
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SICSLOWPAN_UDP_8_BIT_PORT_MIN));
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memcpy(hc06_ptr + 2, &UIP_UDP_BUF->destport, 2);
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hc06_ptr += 4;
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} else {
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/* we cannot compress. Copy uncompressed ports, full chcksum */
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*hc06_ptr = SICSLOWPAN_NHC_UDP_I;
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/* we cannot compress. Copy uncompressed ports, full checksum */
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*hc06_ptr = SICSLOWPAN_NHC_UDP_CS_P_00;
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PRINTF("IPHC: cannot compress headers\n");
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memcpy(hc06_ptr + 1, &UIP_UDP_BUF->srcport, 4);
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memcpy(hc06_ptr + 5, &UIP_UDP_BUF->udpchksum, 2);
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hc06_ptr += 7;
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hc06_ptr += 5;
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}
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/* always inline the checksum */
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if(1) {
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memcpy(hc06_ptr, &UIP_UDP_BUF->udpchksum, 2);
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hc06_ptr += 2;
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}
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uncomp_hdr_len += UIP_UDPH_LEN;
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}
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@ -877,33 +901,63 @@ uncompress_hdr_hc06(u16_t ip_len) {
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if((RIME_IPHC_BUF[0] & SICSLOWPAN_IPHC_NH_C)) {
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/* The next header is compressed, NHC is following */
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if((*hc06_ptr & SICSLOWPAN_NHC_UDP_MASK) == SICSLOWPAN_NHC_UDP_ID) {
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uint8_t checksum_compressed;
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SICSLOWPAN_IP_BUF->proto = UIP_PROTO_UDP;
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switch(*hc06_ptr) {
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case SICSLOWPAN_NHC_UDP_C:
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/* 1 byte for NHC, 1 byte for ports, 2 bytes chksum */
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SICSLOWPAN_UDP_BUF->srcport = HTONS(SICSLOWPAN_UDP_PORT_MIN +
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(*(hc06_ptr + 1) >> 4));
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SICSLOWPAN_UDP_BUF->destport = HTONS(SICSLOWPAN_UDP_PORT_MIN +
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((*(hc06_ptr + 1)) & 0x0F));
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memcpy(&SICSLOWPAN_UDP_BUF->udpchksum, hc06_ptr + 2, 2);
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PRINTF("IPHC: Uncompressed UDP ports (4): %x, %x\n",
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SICSLOWPAN_UDP_BUF->srcport, SICSLOWPAN_UDP_BUF->destport);
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hc06_ptr += 4;
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break;
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case SICSLOWPAN_NHC_UDP_I:
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checksum_compressed = *hc06_ptr & SICSLOWPAN_NHC_UDP_CHECKSUMC;
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PRINTF("IPHC: Incoming header value: %i\n", *hc06_ptr);
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switch(*hc06_ptr & SICSLOWPAN_NHC_UDP_CS_P_11) {
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case SICSLOWPAN_NHC_UDP_CS_P_00:
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/* 1 byte for NHC, 4 byte for ports, 2 bytes chksum */
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memcpy(&SICSLOWPAN_UDP_BUF->srcport, hc06_ptr + 1, 2);
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memcpy(&SICSLOWPAN_UDP_BUF->destport, hc06_ptr + 3, 2);
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memcpy(&SICSLOWPAN_UDP_BUF->udpchksum, hc06_ptr + 5, 2);
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PRINTF("IPHC: Uncompressed UDP ports (7): %x, %x\n",
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SICSLOWPAN_UDP_BUF->srcport, SICSLOWPAN_UDP_BUF->destport);
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hc06_ptr += 7;
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PRINTF("IPHC: Uncompressed UDP ports (ptr+5): %x, %x\n",
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HTONS(SICSLOWPAN_UDP_BUF->srcport), HTONS(SICSLOWPAN_UDP_BUF->destport));
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hc06_ptr += 5;
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break;
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case SICSLOWPAN_NHC_UDP_CS_P_01:
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//1 byte for NHC + source 16bit inline, dest = 0xF0 + 8 bit inline
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PRINTF("IPHC: Decompressing destination\n");
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memcpy(&SICSLOWPAN_UDP_BUF->srcport, hc06_ptr + 1, 2);
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SICSLOWPAN_UDP_BUF->destport = HTONS(SICSLOWPAN_UDP_8_BIT_PORT_MIN + (*(hc06_ptr + 3)));
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PRINTF("IPHC: Uncompressed UDP ports (ptr+4): %x, %x\n",
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HTONS(SICSLOWPAN_UDP_BUF->srcport), HTONS(SICSLOWPAN_UDP_BUF->destport));
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hc06_ptr += 4;
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break;
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case SICSLOWPAN_NHC_UDP_CS_P_10:
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//1 byte for NHC + source = 0xF0 + 8bit inline, dest = 16 bit inline
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PRINTF("IPHC: Decompressing source\n");
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SICSLOWPAN_UDP_BUF->srcport = HTONS(SICSLOWPAN_UDP_8_BIT_PORT_MIN +
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(*(hc06_ptr + 1)));
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memcpy(&SICSLOWPAN_UDP_BUF->destport, hc06_ptr + 2, 2);
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PRINTF("IPHC: Uncompressed UDP ports (ptr+4): %x, %x\n",
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HTONS(SICSLOWPAN_UDP_BUF->srcport), HTONS(SICSLOWPAN_UDP_BUF->destport));
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hc06_ptr += 4;
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break;
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case SICSLOWPAN_NHC_UDP_CS_P_11:
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/* 1 byte for NHC, 1 byte for ports */
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SICSLOWPAN_UDP_BUF->srcport = HTONS(SICSLOWPAN_UDP_4_BIT_PORT_MIN +
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(*(hc06_ptr + 1) >> 4));
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SICSLOWPAN_UDP_BUF->destport = HTONS(SICSLOWPAN_UDP_4_BIT_PORT_MIN +
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((*(hc06_ptr + 1)) & 0x0F));
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PRINTF("IPHC: Uncompressed UDP ports (ptr+2): %x, %x\n",
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HTONS(SICSLOWPAN_UDP_BUF->srcport), HTONS(SICSLOWPAN_UDP_BUF->destport));
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hc06_ptr += 2;
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break;
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default:
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PRINTF("sicslowpan uncompress_hdr: error unsupported UDP compression\n");
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return;
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}
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if(!checksum_compressed) { /* has_checksum, default */
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memcpy(&SICSLOWPAN_UDP_BUF->udpchksum, hc06_ptr, 2);
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hc06_ptr += 2;
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PRINTF("IPHC: sicslowpan uncompress_hdr: checksum included\n");
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} else {
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PRINTF("IPHC: sicslowpan uncompress_hdr: checksum *NOT* included\n");
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}
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uncomp_hdr_len += UIP_UDPH_LEN;
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}
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#ifdef SICSLOWPAN_NH_COMPRESSOR
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@ -33,7 +33,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: sicslowpan.h,v 1.12 2010/03/17 20:57:25 joxe Exp $
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* $Id: sicslowpan.h,v 1.13 2010/03/26 10:28:51 joxe Exp $
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*/
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/**
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* \file
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@ -55,9 +55,12 @@
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* \name General sicslowpan defines
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* @{
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*/
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/* Min and Max compressible UDP ports */
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#define SICSLOWPAN_UDP_PORT_MIN 0xF0B0
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#define SICSLOWPAN_UDP_PORT_MAX 0xF0BF /* F0B0 + 15 */
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/* Min and Max compressible UDP ports - HC06 */
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#define SICSLOWPAN_UDP_4_BIT_PORT_MIN 0xF0B0
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#define SICSLOWPAN_UDP_4_BIT_PORT_MAX 0xF0BF /* F0B0 + 15 */
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#define SICSLOWPAN_UDP_8_BIT_PORT_MIN 0xF000
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#define SICSLOWPAN_UDP_8_BIT_PORT_MAX 0xF0FF /* F000 + 255 */
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/** @} */
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/**
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@ -141,14 +144,23 @@
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#define SICSLOWPAN_NHC_MASK 0xF0
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#define SICSLOWPAN_NHC_EXT_HDR 0xE0
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/**
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* \name LOWPAN_UDP encoding (works together with IPHC)
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* @{
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*/
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/**
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* \name LOWPAN_UDP encoding (works together with IPHC)
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* @{
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*/
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#define SICSLOWPAN_NHC_UDP_MASK 0xF8
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#define SICSLOWPAN_NHC_UDP_ID 0xF0
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#define SICSLOWPAN_NHC_UDP_C 0xF3
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#define SICSLOWPAN_NHC_UDP_I 0xF0
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#define SICSLOWPAN_NHC_UDP_CHECKSUMC 0x04
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#define SICSLOWPAN_NHC_UDP_CHECKSUMI 0x00
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/* values for port compression, _with checksum_ ie bit 5 set to 0 */
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#define SICSLOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */
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#define SICSLOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline, dest = 0xF0 + 8 bit inline */
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#define SICSLOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline, dest = 16 bit inline */
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#define SICSLOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */
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/** @} */
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