netdev - [PATCH iproute-next v4 2/3] lib: Introduce ppp protocols

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Message-Id: <20220729085035.535788-3-wojciech.drewek@intel.com>
Date:   Fri, 29 Jul 2022 10:50:34 +0200
From:   Wojciech Drewek <wojciech.drewek@...el.com>
To:     netdev@...r.kernel.org
Cc:     dsahern@...il.com, stephen@...workplumber.org, gnault@...hat.com
Subject: [PATCH iproute-next v4 2/3] lib: Introduce ppp protocols

PPP protocol field uses different values than ethertype. Introduce
utilities for translating PPP protocols from strings to values
and vice versa. Use generic API from utils in order to get
proto id and name.

Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
v4: ppp_defs.h removed
---
 include/rt_names.h |  3 +++
 lib/Makefile       |  2 +-
 lib/ppp_proto.c    | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 lib/ppp_proto.c

diff --git a/include/rt_names.h b/include/rt_names.h
index 1835f3be2bed..6358650db404 100644
--- a/include/rt_names.h
+++ b/include/rt_names.h
@@ -31,6 +31,9 @@ int ll_addr_a2n(char *lladdr, int len, const char *arg);
 const char * ll_proto_n2a(unsigned short id, char *buf, int len);
 int ll_proto_a2n(unsigned short *id, const char *buf);
 
+const char *ppp_proto_n2a(unsigned short id, char *buf, int len);
+int ppp_proto_a2n(unsigned short *id, const char *buf);
+
 const char *nl_proto_n2a(int id, char *buf, int len);
 int nl_proto_a2n(__u32 *id, const char *arg);
 
diff --git a/lib/Makefile b/lib/Makefile
index 6c98f9a61fdb..ddedd37feb32 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -5,7 +5,7 @@ CFLAGS += -fPIC
 
 UTILOBJ = utils.o utils_math.o rt_names.o ll_map.o ll_types.o ll_proto.o ll_addr.o \
 	inet_proto.o namespace.o json_writer.o json_print.o json_print_math.o \
-	names.o color.o bpf_legacy.o bpf_glue.o exec.o fs.o cg_map.o
+	names.o color.o bpf_legacy.o bpf_glue.o exec.o fs.o cg_map.o ppp_proto.o
 
 ifeq ($(HAVE_ELF),y)
 ifeq ($(HAVE_LIBBPF),y)
diff --git a/lib/ppp_proto.c b/lib/ppp_proto.c
new file mode 100644
index 000000000000..a63466432888
--- /dev/null
+++ b/lib/ppp_proto.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Utilities for translating PPP protocols from strings
+ * and vice versa.
+ *
+ * Authors:     Wojciech Drewek <wojciech.drewek@...el.com>
+ */
+
+#include <linux/ppp_defs.h>
+#include <linux/if_ether.h>
+#include "utils.h"
+#include "rt_names.h"
+
+static const struct proto ppp_proto_names[] = {
+	{PPP_IP, "ip"},
+	{PPP_AT, "at"},
+	{PPP_IPX, "ipx"},
+	{PPP_VJC_COMP, "vjc_comp"},
+	{PPP_VJC_UNCOMP, "vjc_uncomp"},
+	{PPP_MP, "mp"},
+	{PPP_IPV6, "ipv6"},
+	{PPP_COMPFRAG, "compfrag"},
+	{PPP_COMP, "comp"},
+	{PPP_MPLS_UC, "mpls_uc"},
+	{PPP_MPLS_MC, "mpls_mc"},
+	{PPP_IPCP, "ipcp"},
+	{PPP_ATCP, "atcp"},
+	{PPP_IPXCP, "ipxcp"},
+	{PPP_IPV6CP, "ipv6cp"},
+	{PPP_CCPFRAG, "ccpfrag"},
+	{PPP_CCP, "ccp"},
+	{PPP_MPLSCP, "mplscp"},
+	{PPP_LCP, "lcp"},
+	{PPP_PAP, "pap"},
+	{PPP_LQR, "lqr"},
+	{PPP_CHAP, "chap"},
+	{PPP_CBCP, "cbcp"},
+};
+
+const char *ppp_proto_n2a(unsigned short id, char *buf, int len)
+{
+	size_t len_tb = ARRAY_SIZE(ppp_proto_names);
+
+	return proto_n2a(id, buf, len, ppp_proto_names, len_tb);
+}
+
+int ppp_proto_a2n(unsigned short *id, const char *buf)
+{
+	size_t len_tb = ARRAY_SIZE(ppp_proto_names);
+
+	return proto_a2n(id, buf, ppp_proto_names, len_tb);
+}
-- 
2.31.1