From d8833593c704fffec95ad513c5282337aa4f2d3a Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Thu, 23 Apr 2020 11:12:05 +0200
Subject: [PATCH] ip.7: Note a few more valid 'protocol' values

See https://bugzilla.kernel.org/show_bug.cgi?id=204981

Reported-by: Martin Doucha <mdoucha@suse.cz>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man7/ip.7 | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/man7/ip.7 b/man7/ip.7
index 59f05ae37..2ea454748 100644
--- a/man7/ip.7
+++ b/man7/ip.7
@@ -78,28 +78,44 @@ An IP socket is created using
 .PP
     socket(AF_INET, socket_type, protocol);
 .PP
-Valid socket types are
+Valid socket types include
 .B SOCK_STREAM
-to open a
-.BR tcp (7)
-socket,
+to open a stream socket,
 .B SOCK_DGRAM
-to open a
-.BR udp (7)
-socket, or
+to open a datagram socket, and
 .B SOCK_RAW
 to open a
 .BR raw (7)
 socket to access the IP protocol directly.
+.PP
 .I protocol
 is the IP protocol in the IP header to be received or sent.
-The only valid values for
+Valid values for
 .I protocol
-are 0 and
+include:
+.IP \(bu 2
+0 and
 .B IPPROTO_TCP
-for TCP sockets, and 0 and
+for
+.BR tcp (7)
+stream sockets;
+.IP \(bu
+0 and
 .B IPPROTO_UDP
-for UDP sockets.
+for
+.BR udp (7)
+datagram sockets;
+.IP \(bu
+.B IPPROTO_SCTP
+for
+.BR sctp (7)
+stream sockets; and
+.IP \(bu
+.B IPPROTO_UDPLITE
+for
+.BR udplite (7)
+datagram sockets.
+.PP
 For
 .B SOCK_RAW
 you may specify a valid IANA IP protocol defined in