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In tun mode, device's fake MAC address is derived from its EUI-64.

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This commit is contained in:
Salvatore Pitrulli 2011-03-22 12:48:02 +01:00
parent 45db1a6faf
commit efa214533c
2 changed files with 40 additions and 14 deletions
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52
tools/stm32w/wpcapslip6/wpcapslip6.c Normal file → Executable file
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@ -116,13 +116,11 @@ static bool clean_route = false;
static bool clean_neighb = false; static bool clean_neighb = false;
static struct uip_eth_addr adapter_eth_addr; static struct uip_eth_addr adapter_eth_addr;
static char * if_name; static char * if_name;
static char * if_mac;
OSVERSIONINFO osVersionInfo; OSVERSIONINFO osVersionInfo;
/* Fictitious Ethernet address of the attached device (used in tun mode). */ /* Fictitious Ethernet address of the attached device (used in tun mode). */
#define DEV_MAC_ADDR "02-00-00-00-00-02" static struct uip_eth_addr dev_eth_addr = {{0x00,0x00,0x00,0x00,0x00,0x00}};
static const struct uip_eth_addr dev_eth_addr = {{0x02,0x00,0x00,0x00,0x00,0x02}};
static bool request_mac = true; static bool request_mac = true;
@ -327,22 +325,51 @@ read_more:
if(inpktbuf[0] == '!') { if(inpktbuf[0] == '!') {
if (inpktbuf[1] == 'M' && inbufptr == 18) { if (inpktbuf[1] == 'M' && inbufptr == 18) {
/* Read gateway MAC address and autoconfigure tap0 interface */ /* Read gateway MAC address and autoconfigure tap0 interface */
char macs[24]; char macs64[24], macs48[18];
int addr_bytes[8];
int i, pos; int i, pos;
for(i = 0, pos = 0; i < 16; i++) { for(i = 0, pos = 0; i < 16; i++) {
macs[pos++] = inpktbuf[2 + i]; macs64[pos++] = inpktbuf[2 + i];
if ((i & 1) == 1 && i < 14) { if ((i & 1) == 1 && i < 14) {
macs[pos++] = ':'; macs64[pos++] = '-';
} }
} }
macs[pos] = '\0'; macs64[pos] = '\0';
printf("*** Gateway's MAC address: %s\n", macs); printf("*** Gateway's MAC address: %s\n", macs64);
mac_received = true; mac_received = true;
sscanf(macs64, "%2X-%2X-%2X-%2X-%2X-%2X-%2X-%2X",
&addr_bytes[0],
&addr_bytes[1],
&addr_bytes[2],
&addr_bytes[3],
&addr_bytes[4],
&addr_bytes[5],
&addr_bytes[6],
&addr_bytes[7]);
/* Form a fictitious MAC address for the attached device from its EUI-64 (2 middle bytes elided) */
addr_bytes[0] |= 0x02;
for(i=0;i<3;i++){
dev_eth_addr.addr[i] = addr_bytes[i];
}
for(i=3;i<6;i++){
dev_eth_addr.addr[i] = addr_bytes[i+2];
}
sprintf(macs48,"%02X-%02X-%02X-%02X-%02X-%02X",
dev_eth_addr.addr[0],
dev_eth_addr.addr[1],
dev_eth_addr.addr[2],
dev_eth_addr.addr[3],
dev_eth_addr.addr[4],
dev_eth_addr.addr[5]);
printf("Fictitious MAC-48: %s\n", macs48);
if(autoconf){ if(autoconf){
if(IPAddrFromPrefix(autoconf_addr, ipprefix, macs)!=0){ if(IPAddrFromPrefix(autoconf_addr, ipprefix, macs64)!=0){
fprintf(stderr, "Invalid IPv6 address.\n"); fprintf(stderr, "Invalid IPv6 address.\n");
exit(1); exit(1);
} }
@ -353,13 +380,13 @@ read_more:
if(br_prefix != NULL){ if(br_prefix != NULL){
/* RPL Border Router mode. Add route towards LoWPAN. */ /* RPL Border Router mode. Add route towards LoWPAN. */
if(IPAddrFromPrefix(rem_ipaddr, br_prefix, macs)!=0){ if(IPAddrFromPrefix(rem_ipaddr, br_prefix, macs64)!=0){
fprintf(stderr, "Invalid IPv6 address.\n"); fprintf(stderr, "Invalid IPv6 address.\n");
exit(1); exit(1);
} }
addLoWPANRoute(if_name, br_prefix, rem_ipaddr); addLoWPANRoute(if_name, br_prefix, rem_ipaddr);
addNeighbor(if_name, rem_ipaddr, if_mac);//DEV_MAC_ADDR); addNeighbor(if_name, rem_ipaddr, macs48);
} }
} }
@ -860,7 +887,7 @@ int IPAddrFromPrefix(char * ipaddr, const char * ipprefix, const char * mac)
// sscanf requires int instead of 8-bit for hexadecimal variables. // sscanf requires int instead of 8-bit for hexadecimal variables.
sscanf(mac, "%2X:%2X:%2X:%2X:%2X:%2X:%2X:%2X", sscanf(mac, "%2X-%2X-%2X-%2X-%2X-%2X-%2X-%2X",
&addr_bytes[0], &addr_bytes[0],
&addr_bytes[1], &addr_bytes[1],
&addr_bytes[2], &addr_bytes[2],
@ -1060,7 +1087,6 @@ main(int argc, char **argv)
(int *)&adapter_eth_addr.addr[2],(int *)&adapter_eth_addr.addr[3], (int *)&adapter_eth_addr.addr[2],(int *)&adapter_eth_addr.addr[3],
(int *)&adapter_eth_addr.addr[4],(int *)&adapter_eth_addr.addr[5]); (int *)&adapter_eth_addr.addr[4],(int *)&adapter_eth_addr.addr[5]);
if_name = wpcap_start(&adapter_eth_addr, verbose); if_name = wpcap_start(&adapter_eth_addr, verbose);
if_mac = argv[1];
if(local_ipaddr!=NULL){ if(local_ipaddr!=NULL){
addAddress(if_name, local_ipaddr); addAddress(if_name, local_ipaddr);

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tools/stm32w/wpcapslip6/wpcapslip6.exe Normal file → Executable file
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