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socket: SIOCSIFADDR ioctl

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Matheus
2024-04-07 23:40:51 -03:00
parent dff16f2574
commit dbb5ff27fd
3 changed files with 33 additions and 0 deletions
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tools/netd/main.c
+17
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@@ -17,6 +17,9 @@
#ifndef SIOCADDRT
#define SIOCADDRT 0x890B
#endif
#ifndef SIOCSIFADDR
#define SIOCSIFADDR 0x8916
#endif
#define DHCPHDR_TYPE_CLIENT 1
#define DHCPHDR_TYPE_SERVER 2
@@ -406,6 +409,19 @@ static void addroute(char *device, uint32_t addr, uint32_t gateway, uint32_t mas
logstrerror("failed to add route");
}
static void setifip(char *device, uint32_t addr) {
// get hardware address of device
struct ifreq buffer = {0};
strcpy(buffer.ifr_name, device);
struct sockaddr_in *sockaddr = (struct sockaddr_in *)&buffer.ifr_addr;
sockaddr->sin_family = AF_INET;
sockaddr->sin_addr.s_addr = htonl(addr);
if (ioctl(sockfd, SIOCSIFADDR, &buffer))
logstrerror("failed to set device ip address");
}
int main(int argc, char *argv[]) {
name = argv[0];
@@ -469,6 +485,7 @@ int main(int argc, char *argv[]) {
addroute(argv[1], 0, offer.router, 0, 1);
addroute(argv[1], offer.clientip, 0, offer.netmask, 10);
setifip(argv[1], offer.clientip);
return EXIT_SUCCESS;
}