refactoring of hc06 code
This commit is contained in:
joxe
parent
0299aab5e4
commit
453cf7f2e6
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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 1.28 2010/03/15 16:41:24 joxe Exp $
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* $Id: sicslowpan.c,v 1.29 2010/03/16 10:21:04 joxe Exp $
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*/
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/**
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* \file
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@ -255,10 +255,10 @@ addr_contexts[SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS];
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static struct sicslowpan_addr_context *context;
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/** pointer to the byte where to write next inline field. */
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static u8_t *hc06_ptr;
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static uint8_t *hc06_ptr;
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/** Index for loops. */
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static u8_t i;
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static uint8_t i;
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/** @} */
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@ -300,6 +300,63 @@ packet_sent(void *ptr, int status, int transmissions)
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neighbor_info_packet_sent(status, transmissions);
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#endif /* SICSLOWPAN_CONF_NEIGHBOR_INFO */
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}
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/*--------------------------------------------------------------------*/
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static void
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compress_addr_64(uint8_t bitpos, uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr) {
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if(uip_is_addr_mac_addr_based(ipaddr, lladdr)){
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RIME_IPHC_BUF[1] |= 3 << bitpos; /* 0-bits */
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} else if(sicslowpan_is_iid_16_bit_compressable(ipaddr)){
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/* compress IID to 16 bits xxxx::XXXX */
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RIME_IPHC_BUF[1] |= 2 << bitpos; /* 16-bits */
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memcpy(hc06_ptr, &ipaddr->u16[7], 2);
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hc06_ptr += 2;
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} else {
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/* do not compress IID => xxxx::IID */
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RIME_IPHC_BUF[1] |= 1 << bitpos; /* 64-bits */
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memcpy(hc06_ptr, &ipaddr->u16[4], 8);
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hc06_ptr += 8;
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}
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}
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/*--------------------------------------------------------------------*/
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static void
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uncompress_lladdr(uint8_t mode, uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr) {
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switch(mode) {
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case 0: /* 00 -> 128 bits */
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/* copy whole address from packet */
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memcpy(ipaddr, hc06_ptr, 16);
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hc06_ptr += 16;
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break;
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case 1: /* 01 -> 64 bits */
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ipaddr->u8[0] = 0xfe;
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ipaddr->u8[1] = 0x80;
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/* copy 6 NULL bytes then 2 last bytes of IID */
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memset(&ipaddr->u8[2], 0, 6);
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/* copy IID from packet */
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memcpy(&ipaddr->u8[8], hc06_ptr, 8);
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hc06_ptr += 8;
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break;
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case 2: /* 10 -> 16 bits */
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ipaddr->u8[0] = 0xfe;
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ipaddr->u8[1] = 0x80;
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/* copy 12 NULL bytes then 2 last bytes of IID */
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memset(&ipaddr->u8[2], 0, 12);
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memcpy(&ipaddr->u8[14], hc06_ptr, 2);
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hc06_ptr += 2;
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break;
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case 3: /* 11 -> 0 bits */
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/* setup link-local address */
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ipaddr->u8[0] = 0xfe;
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ipaddr->u8[1] = 0x80;
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/* copy 12 NULL bytes then 8 last bytes from L2 */
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memset(&ipaddr->u8[2], 0, 6);
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/* infer IID from L2 address */
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uip_ds6_set_addr_iid(ipaddr, lladdr);
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break;
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}
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}
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/*--------------------------------------------------------------------*/
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/**
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* \brief Compress IP/UDP header
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@ -471,38 +528,13 @@ compress_hdr_hc06(rimeaddr_t *rime_destaddr)
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_CID | SICSLOWPAN_IPHC_SAC;
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RIME_IPHC_BUF[2] |= context->number << 4;
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/* compession compare with this nodes address (source) */
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if(uip_is_addr_mac_addr_based(&UIP_IP_BUF->srcipaddr, &uip_lladdr)){
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/* elide the IID */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_11; /* 0-bits */
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} else {
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if(sicslowpan_is_iid_16_bit_compressable(&UIP_IP_BUF->srcipaddr)){
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/* compress IID to 16 bits */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_10; /* 16-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->srcipaddr.u16[7], 2);
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hc06_ptr += 2;
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} else {
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/* do not compress IID */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_01; /* 64-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->srcipaddr.u16[4], 8);
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hc06_ptr += 8;
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}
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}
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compress_addr_64(SICSLOWPAN_IPHC_SAM_BIT,
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&UIP_IP_BUF->srcipaddr, &uip_lladdr);
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/* No context found for this address */
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} else if(uip_is_addr_link_local(&UIP_IP_BUF->srcipaddr)) {
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// TODO: make a function of this: compress_ll_hc06(&UIP_IP_BUF->srcipaddr);
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if(uip_is_addr_mac_addr_based(&UIP_IP_BUF->srcipaddr, &uip_lladdr)){
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_11; /* 0-bits */
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} else if(sicslowpan_is_iid_16_bit_compressable(&UIP_IP_BUF->srcipaddr)){
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/* compress IID to 16 bits fe80::XXXX */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_10; /* 16-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->srcipaddr.u16[7], 2);
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hc06_ptr += 2;
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} else {
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/* do not compress IID => fe80::IID */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_01; /* 64-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->srcipaddr.u16[4], 8);
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hc06_ptr += 8;
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}
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compress_addr_64(SICSLOWPAN_IPHC_SAM_BIT,
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&UIP_IP_BUF->srcipaddr, &uip_lladdr);
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} else {
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/* send the full address => SAC = 0, SAM = 00 */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_SAM_00; /* 128-bits */
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@ -544,38 +576,13 @@ compress_hdr_hc06(rimeaddr_t *rime_destaddr)
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAC;
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RIME_IPHC_BUF[2] |= context->number;
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/* compession compare with link adress (destination) */
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if(uip_is_addr_mac_addr_based(&UIP_IP_BUF->destipaddr, (uip_lladdr_t *)rime_destaddr)) {
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/* elide the IID */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_11; /* 0-bits */
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} else {
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if(sicslowpan_is_iid_16_bit_compressable(&UIP_IP_BUF->destipaddr)) {
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/* compress IID to 16 bits */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_10; /* 16-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->destipaddr.u16[7], 2);
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hc06_ptr += 2;
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} else {
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/* do not compress IID */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_01; /* 64-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->destipaddr.u16[4], 8);
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hc06_ptr += 8;
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}
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}
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compress_addr_64(SICSLOWPAN_IPHC_DAM_BIT,
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&UIP_IP_BUF->destipaddr, (uip_lladdr_t *)rime_destaddr);
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/* No context found for this address */
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} else if(uip_is_addr_link_local(&UIP_IP_BUF->destipaddr)) {
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// TODO: make a function of this: compress_ll_hc06(&UIP_IP_BUF->destipaddr);
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if(uip_is_addr_mac_addr_based(&UIP_IP_BUF->destipaddr, (uip_lladdr_t *)rime_destaddr)) {
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_11; /* 0-bits */
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} else if(sicslowpan_is_iid_16_bit_compressable(&UIP_IP_BUF->destipaddr)){
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/* compress IID to 16 bits fe80::XXXX */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_10; /* 16-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->destipaddr.u16[7], 2);
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hc06_ptr += 2;
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} else {
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/* do not compress IID => fe80::IID */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_01; /* 64-bits */
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memcpy(hc06_ptr, &UIP_IP_BUF->destipaddr.u16[4], 8);
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hc06_ptr += 8;
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}
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compress_addr_64(SICSLOWPAN_IPHC_DAM_BIT,
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&UIP_IP_BUF->destipaddr, (uip_lladdr_t *)rime_destaddr);
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} else {
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/* send the full address */
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RIME_IPHC_BUF[1] |= SICSLOWPAN_IPHC_DAM_00; /* 128-bits */
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@ -760,40 +767,8 @@ uncompress_hdr_hc06(u16_t ip_len) {
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/* end context based compression */
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} else {
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/* no compression and link local */
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switch(RIME_IPHC_BUF[1] & SICSLOWPAN_IPHC_SAM_11) {
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case SICSLOWPAN_IPHC_SAM_00: /* 128 bits */
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/* copy whole address from packet */
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memcpy(&SICSLOWPAN_IP_BUF->srcipaddr.u8[0], hc06_ptr, 16);
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hc06_ptr += 16;
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break;
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case SICSLOWPAN_IPHC_SAM_01: /* 64 bits */
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SICSLOWPAN_IP_BUF->srcipaddr.u8[0] = 0xfe;
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SICSLOWPAN_IP_BUF->srcipaddr.u8[1] = 0x80;
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/* copy 6 NULL bytes then 2 last bytes of IID */
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memset(&SICSLOWPAN_IP_BUF->srcipaddr.u8[2], 0, 6);
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/* copy IID from packet */
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memcpy(&SICSLOWPAN_IP_BUF->srcipaddr.u8[8], hc06_ptr, 8);
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hc06_ptr += 8;
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break;
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case SICSLOWPAN_IPHC_SAM_10: /* 16 bits */
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SICSLOWPAN_IP_BUF->srcipaddr.u8[0] = 0xfe;
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SICSLOWPAN_IP_BUF->srcipaddr.u8[1] = 0x80;
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/* copy 12 NULL bytes then 2 last bytes of IID */
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memset(&SICSLOWPAN_IP_BUF->srcipaddr.u8[2], 0, 12);
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memcpy(&SICSLOWPAN_IP_BUF->srcipaddr.u8[14], hc06_ptr, 2);
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hc06_ptr += 2;
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break;
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case SICSLOWPAN_IPHC_SAM_11: /* 0 bits */
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/* setup link-local address */
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SICSLOWPAN_IP_BUF->srcipaddr.u8[0] = 0xfe;
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SICSLOWPAN_IP_BUF->srcipaddr.u8[1] = 0x80;
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/* copy 12 NULL bytes then 8 last bytes from L2 */
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memset(&SICSLOWPAN_IP_BUF->srcipaddr.u8[2], 0, 6);
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/* infer IID from L2 address */
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uip_ds6_set_addr_iid(&SICSLOWPAN_IP_BUF->srcipaddr,
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(uip_lladdr_t *)packetbuf_addr(PACKETBUF_ADDR_SENDER));
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break;
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}
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uncompress_lladdr((RIME_IPHC_BUF[1] & SICSLOWPAN_IPHC_SAM_11) >> SICSLOWPAN_IPHC_SAM_BIT,
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&SICSLOWPAN_IP_BUF->srcipaddr, (uip_lladdr_t *)packetbuf_addr(PACKETBUF_ADDR_SENDER));
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}
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/* Destination address */
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@ -872,33 +847,8 @@ uncompress_hdr_hc06(u16_t ip_len) {
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}
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} else {
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/* not context based => link local M = 0, DAC = 0 - same as SAC */
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switch (RIME_IPHC_BUF[1] & SICSLOWPAN_IPHC_DAM_11) {
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case SICSLOWPAN_IPHC_DAM_00: /* 128 bits */
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memcpy(&SICSLOWPAN_IP_BUF->destipaddr.u8[0], hc06_ptr, 16);
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hc06_ptr += 16;
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break;
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case SICSLOWPAN_IPHC_DAM_01: /* 64 bits */
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SICSLOWPAN_IP_BUF->destipaddr.u8[0] = 0xfe;
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SICSLOWPAN_IP_BUF->destipaddr.u8[1] = 0x80;
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memset(&SICSLOWPAN_IP_BUF->destipaddr.u8[2], 0, 6);
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memcpy(&SICSLOWPAN_IP_BUF->destipaddr.u8[8], hc06_ptr, 8);
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hc06_ptr += 8;
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break;
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case SICSLOWPAN_IPHC_DAM_10: /* 16 bits */
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SICSLOWPAN_IP_BUF->destipaddr.u8[0] = 0xfe;
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SICSLOWPAN_IP_BUF->destipaddr.u8[1] = 0x80;
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memset(&SICSLOWPAN_IP_BUF->destipaddr.u8[2], 0, 12);
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memcpy(&SICSLOWPAN_IP_BUF->destipaddr.u8[14], hc06_ptr, 2);
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hc06_ptr += 2;
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break;
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case SICSLOWPAN_IPHC_DAM_11: /* 0 bits */
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SICSLOWPAN_IP_BUF->destipaddr.u8[0] = 0xfe;
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SICSLOWPAN_IP_BUF->destipaddr.u8[1] = 0x80;
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memset(&SICSLOWPAN_IP_BUF->destipaddr.u8[2], 0, 6);
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uip_ds6_set_addr_iid(&SICSLOWPAN_IP_BUF->destipaddr,
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(uip_lladdr_t *)packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
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break;
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}
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uncompress_lladdr((RIME_IPHC_BUF[1] & SICSLOWPAN_IPHC_DAM_11) >> SICSLOWPAN_IPHC_DAM_BIT,
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&SICSLOWPAN_IP_BUF->destipaddr, (uip_lladdr_t *)packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
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}
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}
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uncomp_hdr_len += UIP_IPH_LEN;
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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 1.9 2010/03/09 15:18:03 c_oflynn Exp $
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* $Id: sicslowpan.h,v 1.10 2010/03/16 10:21:04 joxe Exp $
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*/
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/**
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* \file
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@ -120,6 +120,8 @@
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#define SICSLOWPAN_IPHC_SAM_10 0x20
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#define SICSLOWPAN_IPHC_SAM_11 0x30
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#define SICSLOWPAN_IPHC_SAM_BIT 4
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#define SICSLOWPAN_IPHC_M 0x08
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#define SICSLOWPAN_IPHC_DAC 0x04
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#define SICSLOWPAN_IPHC_DAM_00 0x00
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@ -127,6 +129,8 @@
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#define SICSLOWPAN_IPHC_DAM_10 0x02
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#define SICSLOWPAN_IPHC_DAM_11 0x03
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#define SICSLOWPAN_IPHC_DAM_BIT 0
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/* Link local context number */
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#define SICSLOWPAN_IPHC_ADDR_CONTEXT_LL 0
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/* 16-bit multicast addresses compression */
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