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Kernel: Implement basic gateway for network interfaces

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Bananymous
2024-02-05 17:38:57 +02:00
parent dd3641f054
commit f804e87f7d
5 changed files with 46 additions and 3 deletions
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21
userspace/dhcp-client/main.cpp
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@@ -73,7 +73,7 @@ BAN::MACAddress get_mac_address(int socket)
return mac_address;
}
void update_ipv4_info(int socket, BAN::IPv4Address address, BAN::IPv4Address subnet)
void update_ipv4_info(int socket, BAN::IPv4Address address, BAN::IPv4Address netmask, BAN::IPv4Address gateway)
{
{
ifreq ifreq;
@@ -98,6 +98,19 @@ void update_ipv4_info(int socket, BAN::IPv4Address address, BAN::IPv4Address sub
exit(1);
}
}
if (gateway.raw)
{
ifreq ifreq;
auto& ifru_gwaddr = *reinterpret_cast<sockaddr_in*>(&ifreq.ifr_ifru.ifru_gwaddr);
ifru_gwaddr.sin_family = AF_INET;
ifru_gwaddr.sin_addr.s_addr = gateway.raw;
if (ioctl(socket, SIOCSIFGWADDR, &ifreq) == -1)
{
perror("ioctl");
exit(1);
}
}
}
void send_dhcp_packet(int socket, const DHCPPacket& dhcp_packet, BAN::IPv4Address server_ipv4)
@@ -359,7 +372,11 @@ int main()
return 1;
}
update_ipv4_info(socket, dhcp_ack->address, dhcp_ack->subnet);
BAN::IPv4Address gateway { 0 };
if (!dhcp_ack->routers.empty())
gateway = dhcp_ack->routers.front();
update_ipv4_info(socket, dhcp_ack->address, dhcp_ack->subnet, gateway);
close(socket);