comicsansg/tncattach
1
0
Fork 0
mirror of https://github.com/markqvist/tncattach.git synced 2025-09-03 05:27:47 -04:00
Code Issues Projects Releases Wiki Activity

TAP

Browse Source 
- Removed code to generate a link-local address
This commit is contained in:
Tristan Brice Velloza Kildaire 2024-12-15 17:59:23 +02:00
parent 0d24b3a128
commit b74256bccc
1 changed files with 3 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
TAP.c
View File

@ -24,63 +24,6 @@ extern char* ipv6_addr;
extern char* netmask;
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();
}
}
#include<time.h>
// TODO: Allow optional-arg for case where we must also generate the hwaddr
// (this would be the case whereby we are running without `--ethernet`)
struct in6_addr generateLinkLocal(char* interfaceName)
{
time_t t = time(NULL);
srand(t);
struct in6_addr ll_a;
memset(&ll_a, 0, sizeof(struct in6_addr));
ll_a.s6_addr[0] = 0xfe;
ll_a.s6_addr[1] = 0x80;
// TODO: Set the rest here
// TODO: Loop till we generate an address NOT in use
// (TODO, should not matter, link-local is interface scoped)
// TODO: Should tie it to mac address because of uniqueness
// on the lan it shall attach to (over lora)
localRand(&ll_a);
int dummySock = socket(AF_PACKET, SOCK_PACKET, 0);
if(dummySock < 0)
{
printf("Failed to open configuration socket in order to generate link-local address\n");
close(dummySock);
exit(1);
}
struct ifreq reqParams;
memset(&reqParams, 0, sizeof(reqParams));
strcpy(reqParams.ifr_name, interfaceName);
if(ioctl(dummySock, SIOCGIFHWADDR, &reqParams) < 0)
{
printf("Failed to fetch hardware address Failed to open configuration socket in order to generate link-local address\n");
close(dummySock);
exit(1);
}
return ll_a;
}
void trySixSet
(
@ -164,8 +107,8 @@ int open_tap(void) {
int inet = socket(set_ipv4 ? AF_INET : AF_INET6, SOCK_DGRAM, 0);
printf("inet fd: %d\n", inet);
printf("tun/tap handle fd: %d\n", fd);
printf("set_ipv4: %d\n", set_ipv4);
printf("set_ipv6: %d\n", set_ipv6);
printf("set_ipv4: %d\n", set_ipv4);
printf("set_ipv6: %d\n", set_ipv6);
// inet=fd;
if (inet == -1) {
@ -331,8 +274,7 @@ int open_tap(void) {
// If link-local was requested
if(link_local_v6)
{
// Add link-local address
trySixSet(ifr.ifr_ifindex, generateLinkLocal(if_name), 64);
// Do nothing; kernel adds for us
}
// If use-specified non-link-local IPv6 was