From fbb624e76fde53c42737332510f37ee5a15b3069 Mon Sep 17 00:00:00 2001
From: Ed Schouten <ed@FreeBSD.org>
Date: Wed, 12 Aug 2015 17:42:20 +0000
Subject: [PATCH] Add the last remaining system calls: send() and recv().

There is still one TODO item for these calls: add file descriptor
passing. The data structures are already prepared for this. It's just
the translation that's missing.

Obtained from:	http://github.com/NuxiNL/freebsd
---
 sys/compat/cloudabi64/cloudabi64_sock.c | 104 +++++++++++++++++++++++-
 1 file changed, 100 insertions(+), 4 deletions(-)

diff --git a/sys/compat/cloudabi64/cloudabi64_sock.c b/sys/compat/cloudabi64/cloudabi64_sock.c
index be359899994..c612a32dfc7 100644
--- a/sys/compat/cloudabi64/cloudabi64_sock.c
+++ b/sys/compat/cloudabi64/cloudabi64_sock.c
@@ -26,23 +26,119 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/socket.h>
+#include <sys/syscallsubr.h>
+#include <sys/systm.h>
+#include <sys/uio.h>
+
+#include <compat/cloudabi/cloudabi_util.h>
+
 #include <compat/cloudabi64/cloudabi64_syscalldefs.h>
 #include <compat/cloudabi64/cloudabi64_proto.h>
 
+static MALLOC_DEFINE(M_SOCKET, "socket", "CloudABI socket");
+
 int
 cloudabi64_sys_sock_recv(struct thread *td,
     struct cloudabi64_sys_sock_recv_args *uap)
 {
+	struct sockaddr_storage ss;
+	cloudabi64_recv_in_t ri;
+	cloudabi64_recv_out_t ro = {};
+	cloudabi64_iovec_t iovobj;
+	struct msghdr msghdr = {};
+	size_t i;
+	int error;
+
+	error = copyin(uap->in, &ri, sizeof(ri));
+	if (error != 0)
+		return (error);
+
+	/* Convert results in cloudabi_recv_in_t to struct msghdr. */
+	if (ri.ri_datalen > UIO_MAXIOV)
+		return (EINVAL);
+	msghdr.msg_iovlen = ri.ri_datalen;
+	msghdr.msg_iov = malloc(msghdr.msg_iovlen * sizeof(struct iovec),
+	    M_SOCKET, M_WAITOK);
+	for (i = 0; i < msghdr.msg_iovlen; i++) {
+		error = copyin(&((cloudabi64_iovec_t *)ri.ri_data)[i], &iovobj,
+		    sizeof(iovobj));
+		if (error != 0) {
+			free(msghdr.msg_iov, M_SOCKET);
+			return (error);
+		}
+		msghdr.msg_iov[i].iov_base = (void *)iovobj.iov_base;
+		msghdr.msg_iov[i].iov_len = iovobj.iov_len;
+	}
+	msghdr.msg_name = &ss;
+	msghdr.msg_namelen = sizeof(ss);
+	if (ri.ri_flags & CLOUDABI_MSG_PEEK)
+		msghdr.msg_flags |= MSG_PEEK;
+	if (ri.ri_flags & CLOUDABI_MSG_WAITALL)
+		msghdr.msg_flags |= MSG_WAITALL;
 
-	/* Not implemented. */
-	return (ENOSYS);
+	/* TODO(ed): Add file descriptor passing. */
+	error = kern_recvit(td, uap->s, &msghdr, UIO_SYSSPACE, NULL);
+	free(msghdr.msg_iov, M_SOCKET);
+	if (error != 0)
+		return (error);
+
+	/* Convert results in msghdr to cloudabi_recv_out_t. */
+	ro.ro_datalen = td->td_retval[0];
+	cloudabi_convert_sockaddr((struct sockaddr *)&ss,
+	    MIN(msghdr.msg_namelen, sizeof(ss)), &ro.ro_peername);
+	td->td_retval[0] = 0;
+	return (copyout(&ro, uap->out, sizeof(ro)));
 }
 
 int
 cloudabi64_sys_sock_send(struct thread *td,
     struct cloudabi64_sys_sock_send_args *uap)
 {
+	cloudabi64_send_in_t si;
+	cloudabi64_send_out_t so = {};
+	cloudabi64_ciovec_t iovobj;
+	struct msghdr msghdr = {};
+	size_t i;
+	int error, flags;
+
+	error = copyin(uap->in, &si, sizeof(si));
+	if (error != 0)
+		return (error);
+
+	/* Convert results in cloudabi_send_in_t to struct msghdr. */
+	if (si.si_datalen > UIO_MAXIOV)
+		return (EINVAL);
+	msghdr.msg_iovlen = si.si_datalen;
+	msghdr.msg_iov = malloc(msghdr.msg_iovlen * sizeof(struct iovec),
+	    M_SOCKET, M_WAITOK);
+	for (i = 0; i < msghdr.msg_iovlen; i++) {
+		error = copyin(&((cloudabi64_ciovec_t *)si.si_data)[i], &iovobj,
+		    sizeof(iovobj));
+		if (error != 0) {
+			free(msghdr.msg_iov, M_SOCKET);
+			return (error);
+		}
+		msghdr.msg_iov[i].iov_base = (void *)iovobj.iov_base;
+		msghdr.msg_iov[i].iov_len = iovobj.iov_len;
+	}
+
+	flags = MSG_NOSIGNAL;
+	if (si.si_flags & CLOUDABI_MSG_EOR)
+		flags |= MSG_EOR;
+
+	/* TODO(ed): Add file descriptor passing. */
+	error = kern_sendit(td, uap->s, &msghdr, flags, NULL, UIO_USERSPACE);
+	free(msghdr.msg_iov, M_SOCKET);
+	if (error != 0)
+		return (error);
 
-	/* Not implemented. */
-	return (ENOSYS);
+	/* Convert results in msghdr to cloudabi_send_out_t. */
+	so.so_datalen = td->td_retval[0];
+	td->td_retval[0] = 0;
+	return (copyout(&so, uap->out, sizeof(so)));
 }
-- 
2.45.2