From ec8dcc7faf13c57f5f6d785e4429818f1239a058 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sun, 8 Jan 2023 20:50:18 +0100
Subject: [PATCH] drop decnet

Drop decnet as it has been removed since kernel 6.1 and
https://github.com/torvalds/linux/commit/1202cdd665315c525b5237e96e0bedc76d7e754f
resulting in the following build failure:

net/proto-decnet.c:5:10: fatal error: linux/dn.h: No such file or directory
    5 | #include <linux/dn.h>
      |          ^~~~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/47e0a5e0b6fcf33ab4f9848d5d8c2be9e5283950

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: https://github.com/kernelslacker/trinity/pull/41]
---
 include/net.h      |  1 -
 net/proto-decnet.c | 59 ----------------------------------------------
 net/proto-unix.c   |  1 -
 net/protocols.c    |  1 -
 4 files changed, 62 deletions(-)
 delete mode 100644 net/proto-decnet.c

diff --git a/include/net.h b/include/net.h
index 99d55363..791e8090 100644
--- a/include/net.h
+++ b/include/net.h
@@ -80,7 +80,6 @@ extern const struct netproto proto_atmpvc;
 extern const struct netproto proto_atmsvc;
 extern const struct netproto proto_x25;
 extern const struct netproto proto_rose;
-extern const struct netproto proto_decnet;
 extern const struct netproto proto_llc;
 extern const struct netproto proto_netlink;
 extern const struct netproto proto_packet;
diff --git a/net/proto-decnet.c b/net/proto-decnet.c
deleted file mode 100644
index 7711cf00..00000000
--- a/net/proto-decnet.c
+++ /dev/null
@@ -1,59 +0,0 @@
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <netinet/in.h>
-#include <linux/dn.h>
-#include <stdlib.h>
-#include "net.h"
-#include "random.h"
-#include "utils.h"	// RAND_ARRAY
-#include "compat.h"
-
-static void decnet_gen_sockaddr(struct sockaddr **addr, socklen_t *addrlen)
-{
-	struct sockaddr_dn *dn;
-	unsigned int i;
-
-	dn = zmalloc(sizeof(struct sockaddr_dn));
-
-	dn->sdn_family = PF_DECnet;
-	dn->sdn_flags = rnd();
-	dn->sdn_objnum = rnd();
-	dn->sdn_objnamel = rnd() % 16;
-	for (i = 0; i < dn->sdn_objnamel; i++)
-		dn->sdn_objname[i] = rnd();
-	dn->sdn_add.a_len = RAND_BOOL();
-	dn->sdn_add.a_addr[0] = rnd();
-	dn->sdn_add.a_addr[1] = rnd();
-	*addr = (struct sockaddr *) dn;
-	*addrlen = sizeof(struct sockaddr_dn);
-}
-
-static const unsigned int decnet_opts[] = {
-	SO_CONDATA, SO_CONACCESS, SO_PROXYUSR, SO_LINKINFO,
-	DSO_CONDATA, DSO_DISDATA, DSO_CONACCESS, DSO_ACCEPTMODE,
-	DSO_CONACCEPT, DSO_CONREJECT, DSO_LINKINFO, DSO_STREAM,
-	DSO_SEQPACKET, DSO_MAXWINDOW, DSO_NODELAY, DSO_CORK,
-	DSO_SERVICES, DSO_INFO
-};
-
-static void decnet_setsockopt(struct sockopt *so, __unused__ struct socket_triplet *triplet)
-{
-	so->level = SOL_DECNET;
-	so->optname = RAND_ARRAY(decnet_opts);
-
-	// TODO: set optlen correctly
-}
-
-static struct socket_triplet decnet_triplets[] = {
-	{ .family = PF_DECnet, .protocol = DNPROTO_NSP, .type = SOCK_SEQPACKET },
-	{ .family = PF_DECnet, .protocol = DNPROTO_NSP, .type = SOCK_STREAM },
-};
-
-const struct netproto proto_decnet = {
-	.name = "decnet",
-	.setsockopt = decnet_setsockopt,
-	.gen_sockaddr = decnet_gen_sockaddr,
-	.valid_triplets = decnet_triplets,
-	.nr_triplets = ARRAY_SIZE(decnet_triplets),
-};
diff --git a/net/proto-unix.c b/net/proto-unix.c
index f7427a22..119c1429 100644
--- a/net/proto-unix.c
+++ b/net/proto-unix.c
@@ -2,7 +2,6 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <netinet/in.h>
-#include <linux/dn.h>
 #include <stdlib.h>
 #include "net.h"
 #include "random.h"
diff --git a/net/protocols.c b/net/protocols.c
index ea64d5f5..278f08b5 100644
--- a/net/protocols.c
+++ b/net/protocols.c
@@ -18,7 +18,6 @@ const struct protoptr net_protocols[TRINITY_PF_MAX] = {
 #ifdef USE_IPV6
 	[PF_INET6] = { .proto = &proto_inet6 },
 #endif
-	[PF_DECnet] = { .proto = &proto_decnet },
 	[PF_PACKET] = { .proto = &proto_packet },
 #ifdef USE_NETECONET
 	[PF_ECONET] = { .proto = &proto_econet },
-- 
2.39.0