syscalls: chroot getpeername getsockname socketpair

kernel-src/sys/syscalls/socketpair.c

@@ -0,0 +1,82 @@
+#include <kernel/syscalls.h>
+#include <kernel/sock.h>
+
+syscallret_t syscall_socketpair(context_t *, int domain, int type, int protocol) {
+	syscallret_t ret = {
+		.ret = -1
+	};
+
+	// TODO flags could be OR in with type
+	// we will only support pairs of local sockets
+	if (domain != AF_LOCAL || type != SOCK_STREAM) {
+		ret.errno = EOPNOTSUPP;
+		return ret;
+	}
+
+	vnode_t *node1 = NULL;
+	vnode_t *node2 = NULL;
+	int fd1, fd2;
+	file_t *file1 = NULL;
+	file_t *file2 = NULL;
+	socket_t *sock1 = NULL;
+	socket_t *sock2 = NULL;
+
+	// create pair
+	ret.errno = localsock_pair(&sock1, &sock2);
+	if (ret.errno)
+		return ret;
+
+	// create vnodes
+	ret.errno = sockfs_newsocket(&node1, sock1);
+	if (ret.errno)
+		goto error;
+
+	ret.errno = sockfs_newsocket(&node2, sock2);
+	if (ret.errno)
+		goto error;
+
+	// create fds
+	ret.errno = fd_new(0, &file1, &fd1);
+	if (ret.errno)
+		goto error;
+
+	file1->vnode = node1;
+	file1->flags = FILE_WRITE | FILE_READ;
+	file1->offset = 0;
+	file1->mode = 0777;
+
+	ret.errno = fd_new(0, &file2, &fd2);
+	if (ret.errno)
+		goto error;
+
+	file2->vnode = node2;
+	file2->flags = FILE_WRITE | FILE_READ;
+	file2->offset = 0;
+	file2->mode = 0777;
+
+	ret.errno = 0;
+	ret.ret = (uint64_t)fd1 | ((uint64_t)fd2 << 32);
+
+	return ret;
+	error:
+
+	if (file1) {
+		fd_release(file1);
+		fd_close(fd1);
+	} else if (node1) {
+		VOP_RELEASE(node1);
+	} else {
+		sock1->ops->destroy(sock1);
+	}
+	
+	if (file2) {
+		fd_release(file2);
+		fd_close(fd2);
+	} if (node2) {
+		VOP_RELEASE(node2);
+	} else {
+		sock1->ops->destroy(sock2);
+	}
+
+	return ret;
+}