Kernel/LibC: Implement basic ioctl for network addresses

kernel/kernel/FS/Inode.cpp

@@ -183,4 +183,10 @@ namespace Kernel
 		return has_data_impl();
 	}
 
+	BAN::ErrorOr<long> Inode::ioctl(int request, void* arg)
+	{
+		LockGuard _(m_lock);
+		return ioctl_impl(request, arg);
+	}
+
 }

kernel/kernel/Networking/NetworkSocket.cpp

@@ -2,6 +2,8 @@
 #include <kernel/Networking/NetworkManager.h>
 #include <kernel/Networking/NetworkSocket.h>
 
+#include <net/if.h>
+
 namespace Kernel
 {
 
@@ -123,4 +125,65 @@ namespace Kernel
 		return TRY(read_packet(BAN::ByteSpan { reinterpret_cast<uint8_t*>(arguments->buffer), arguments->length }, sender_addr));
 	}
 
+	BAN::ErrorOr<long> NetworkSocket::ioctl_impl(int request, void* arg)
+	{
+		if (!arg)
+		{
+			dprintln("No argument provided");
+			return BAN::Error::from_errno(EINVAL);
+		}
+		if (m_interface == nullptr)
+		{
+			dprintln("No interface bound");
+			return BAN::Error::from_errno(EADDRNOTAVAIL);
+		}
+
+		auto* ifreq = reinterpret_cast<struct ifreq*>(arg);
+
+		switch (request)
+		{
+			case SIOCGIFADDR:
+			{
+				auto ipv4_address = m_interface->get_ipv4_address();
+				ifreq->ifr_ifru.ifru_addr.sa_family = AF_INET;
+				memcpy(ifreq->ifr_ifru.ifru_addr.sa_data, &ipv4_address, sizeof(ipv4_address));
+				return 0;
+			}
+			case SIOCSIFADDR:
+			{
+				if (ifreq->ifr_ifru.ifru_addr.sa_family != AF_INET)
+					return BAN::Error::from_errno(EADDRNOTAVAIL);
+				BAN::IPv4Address ipv4_address { *reinterpret_cast<uint32_t*>(ifreq->ifr_ifru.ifru_addr.sa_data) };
+				m_interface->set_ipv4_address(ipv4_address);
+				dprintln("IPv4 address set to {}", m_interface->get_ipv4_address());
+				return 0;
+			}
+			case SIOCGIFNETMASK:
+			{
+				auto netmask_address = m_interface->get_netmask();
+				ifreq->ifr_ifru.ifru_netmask.sa_family = AF_INET;
+				memcpy(ifreq->ifr_ifru.ifru_netmask.sa_data, &netmask_address, sizeof(netmask_address));
+				return 0;
+			}
+			case SIOCSIFNETMASK:
+			{
+				if (ifreq->ifr_ifru.ifru_netmask.sa_family != AF_INET)
+					return BAN::Error::from_errno(EADDRNOTAVAIL);
+				BAN::IPv4Address netmask { *reinterpret_cast<uint32_t*>(ifreq->ifr_ifru.ifru_netmask.sa_data) };
+				m_interface->set_netmask(netmask);
+				dprintln("Netmask set to {}", m_interface->get_netmask());
+				return 0;
+			}
+			case SIOCGIFHWADDR:
+			{
+				auto mac_address = m_interface->get_mac_address();
+				ifreq->ifr_ifru.ifru_hwaddr.sa_family = AF_INET;
+				memcpy(ifreq->ifr_ifru.ifru_hwaddr.sa_data, &mac_address, sizeof(mac_address));
+				return 0;
+			}
+			default:
+				return BAN::Error::from_errno(EINVAL);
+		}
+	}
+
 }

kernel/kernel/Process.cpp

@@ -952,6 +952,13 @@ namespace Kernel
 		return TRY(inode->recvfrom(arguments));
 	}
 
+	BAN::ErrorOr<long> Process::sys_ioctl(int fildes, int request, void* arg)
+	{
+		LockGuard _(m_lock);
+		auto inode = TRY(m_open_file_descriptors.inode_of(fildes));
+		return TRY(inode->ioctl(request, arg));
+	}
+
 	BAN::ErrorOr<long> Process::sys_pipe(int fildes[2])
 	{
 		LockGuard _(m_lock);

kernel/kernel/Syscall.cpp

@@ -225,6 +225,9 @@ namespace Kernel
 		case SYS_RECVFROM:
 			ret = Process::current().sys_recvfrom((sys_recvfrom_t*)arg1);
 			break;
+		case SYS_IOCTL:
+			ret = Process::current().sys_ioctl((int)arg1, (int)arg2, (void*)arg3);
+			break;
 		default:
 			dwarnln("Unknown syscall {}", syscall);
 			break;