From bdbec30a849807fb5e6841a38cfe0d168e5962b9 Mon Sep 17 00:00:00 2001
From: Stefano Brivio <sbrivio@redhat.com>
Date: Thu, 21 Dec 2023 12:06:05 +0100
Subject: seitan: Add netlink, sendto()/sendmsg(), iovec handling, demo with
 routes

A bit rough at the moment, but it does the trick. Bonus: setsockopt()
(with magic values only, not used in any demo yet).

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
---
 cooker/calls/net.c | 259 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 259 insertions(+)

(limited to 'cooker/calls')

diff --git a/cooker/calls/net.c b/cooker/calls/net.c
index a348037..94b13cd 100644
--- a/cooker/calls/net.c
+++ b/cooker/calls/net.c
@@ -79,6 +79,9 @@ static struct num protocols[] = {
 	{ "mpls",	IPPROTO_MPLS },
 	{ "raw",	IPPROTO_RAW },
 	{ "mptcp",	IPPROTO_MPTCP },
+
+	{ "nl_route",	NETLINK_ROUTE },
+
 	{ 0 },
 };
 
@@ -243,9 +246,265 @@ static struct arg connect_args[] = {
 	{ 0 }
 };
 
+static struct num send_flags[] = {
+	{ "confirm",	MSG_CONFIRM },
+	{ "dontroute",	MSG_DONTROUTE },
+	{ "dontwait",	MSG_DONTWAIT },
+	{ "eor",	MSG_EOR },
+	{ "more",	MSG_MORE },
+	{ "nosignal",	MSG_NOSIGNAL },
+	{ "oob",	MSG_OOB },
+	{ "fastopen",	MSG_FASTOPEN },
+	{ 0 },
+};
+
+static struct arg send_args[] = {
+	{ 0,
+		{
+			"fd",		INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 1,
+		{
+			"buf",		STRING,		WBUF,
+			0,
+			BUFSIZ,
+			{ 0 },
+		},
+	},
+	{ 2,
+		{
+			"len",		LONG,		SIZE,
+			0,
+			0,
+			{ .d_size = (intptr_t)&send_args[1] },
+		},
+	},
+	{ 3,
+		{
+			"flags",	INT,		FLAGS,
+			0,
+			0,
+			{ .d_num = send_flags }
+		}
+	},
+	{ 0 }
+};
+
+static struct arg sendto_args[] = {
+	{ 0,
+		{
+			"fd",		INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 1,
+		{
+			"buf",		STRING,		WBUF,
+			0,
+			BUFSIZ,
+			{ 0 },
+		},
+	},
+	{ 2,
+		{
+			"len",		LONG,		SIZE,
+			0,
+			0,
+			{ .d_size = (intptr_t)&sendto_args[1] },
+		},
+	},
+	{ 3,
+		{
+			"flags",	INT,		FLAGS,
+			0,
+			0,
+			{ .d_num = send_flags }
+		}
+	},
+	{ 4,
+		{
+			"addr",		SELECT,		0,
+			0,
+			sizeof(struct sockaddr_storage),
+			{ .d_select = &connect_addr_select },
+		},
+	},
+	{ 5,
+		{
+			"addrlen",	LONG,		SIZE,
+			0,
+			0,
+			{ .d_size = (intptr_t)&connect_addr_select },
+		},
+	},
+	{ 0 }
+};
+
+static struct select sendmsg_name_select = {
+	&connect_family, { .d_num = connect_addr_select_family }
+};
+
+static struct field sendmsg_msghdr[] = {
+	{
+		"name",		SELECT,		0,
+		offsetof(struct msghdr, msg_name),
+		sizeof(struct sockaddr_storage),
+		{ .d_select = &sendmsg_name_select },
+	},
+	{
+		"namelen",	LONG,		SIZE,
+		offsetof(struct msghdr, msg_namelen),
+		0,
+		{ .d_size = (intptr_t)&sendmsg_name_select },
+	},
+	{
+		"iov",		STRING,		WBUF | IOV,
+		offsetof(struct msghdr, msg_iov),
+		BUFSIZ,
+		{ .d_iovlen = offsetof(struct msghdr, msg_iovlen) -
+			      offsetof(struct msghdr, msg_iov) },
+	},
+	{
+		"iovlen",	LONG,		0,
+		offsetof(struct msghdr, msg_iovlen),
+		0,
+		{ 0 },
+	},
+	{
+		"control",	STRING,		0,
+		offsetof(struct msghdr, msg_control),
+		BUFSIZ,
+		{ 0 },
+	},
+	{
+		"controllen",	LONG,		SIZE,
+		offsetof(struct msghdr, msg_controllen),
+		0,
+		{ 0 },
+	},
+	{
+		"flags",	INT,		0,
+		offsetof(struct msghdr, msg_flags),
+		0,
+		{ 0 },
+	},
+	{ 0 }
+};
+
+static struct arg sendmsg_args[] = {
+	{ 0,
+		{
+			"fd",		INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 1,
+		{
+			"msg",		STRUCT,		0,
+			0,
+			sizeof(struct msghdr),
+			{ .d_struct = sendmsg_msghdr },
+		},
+	},
+	{ 2,
+		{
+			"flags",	INT,		FLAGS,
+			0,
+			0,
+			{ .d_num = send_flags }
+		}
+	},
+	{ 0 }
+};
+
+static struct arg recvmsg_args[] = {
+	{ 0,
+		{
+			"fd",		INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 1,
+		{
+			"msg",		STRUCT,		0,
+			0,
+			sizeof(struct msghdr),
+			{ .d_struct = sendmsg_msghdr },
+		},
+	},
+	{ 2,
+		{
+			"flags",	INT,		FLAGS,
+			0,
+			0,
+			{ .d_num = send_flags }
+		}
+	},
+	{ 0 }
+};
+
+static struct arg setsockopt_args[] = {
+	{ 0,
+		{
+			"fd",		INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 1,
+		{
+			"level",	INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 2,
+		{
+			"optname",	INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 3,
+		{
+			"optval",	INT,		0,
+			0,
+			BUFSIZ,
+			{ 0 },
+		},
+	},
+	{ 4,
+		{
+			"optlen",	INT,		0,
+			0,
+			0,
+			{ 0 },
+		},
+	},
+	{ 0 }
+};
+
 struct call syscalls_net[] = {
 	{ __NR_connect,		"connect",		connect_args },
 	{ __NR_bind,		"bind",			connect_args },
 	{ __NR_socket,		"socket",		socket_args },
+	/* { __NR_send,		"send",			send_args }, */
+	{ __NR_sendto,		"sendto",		sendto_args },
+	{ __NR_sendmsg,		"sendmsg",		sendmsg_args },
+	{ __NR_recvmsg,		"recvmsg",		recvmsg_args },
+	{ __NR_setsockopt,	"setsockopt",		setsockopt_args },
 	{ 0 },
 };
-- 
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