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TAP

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- Randomize the remaining octets of the link-local address
This commit is contained in:
Tristan Brice Velloza Kildaire 2024-12-14 14:33:32 +02:00
parent 95930680d0
commit 5546163742
1 changed files with 18 additions and 1 deletions
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17
TAP.c
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@ -23,10 +23,22 @@ extern char* ipv6_addr;
extern char* netmask; extern char* netmask;
extern void cleanup(); extern void cleanup();
#include<stdlib.h>
void localRand(struct in6_addr* ll_a)
{
for(int i = 2; i < 16; i++)
{
ll_a->s6_addr[i] = rand();
}
}
// TODO: Allow optional-arg for case where we must also generate the hwaddr // TODO: Allow optional-arg for case where we must also generate the hwaddr
// (this would be the case whereby we are running without `--ethernet`) // (this would be the case whereby we are running without `--ethernet`)
struct in6_addr generateLinkLocal(char* interfaceName) struct in6_addr generateLinkLocal(char* interfaceName)
{ {
srand(0); // TODO: FIXME, use time or something
struct in6_addr ll_a; struct in6_addr ll_a;
memset(&ll_a, 0, sizeof(struct in6_addr)); memset(&ll_a, 0, sizeof(struct in6_addr));
ll_a.s6_addr[0] = 0xfe; ll_a.s6_addr[0] = 0xfe;
@ -38,6 +50,11 @@ struct in6_addr generateLinkLocal(char* interfaceName)
// (TODO, should not matter, link-local is interface scoped) // (TODO, should not matter, link-local is interface scoped)
// TODO: Should tie it to mac address because of uniqueness // TODO: Should tie it to mac address because of uniqueness
// on the lan it shall attach to (over lora) // on the lan it shall attach to (over lora)
localRand(&ll_a);
int dummySock = socket(AF_PACKET, SOCK_PACKET, 0); int dummySock = socket(AF_PACKET, SOCK_PACKET, 0);
if(dummySock < 0) if(dummySock < 0)