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@intel.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David Ahern <dsahern@kernel.org>

2 files changed, 53 insertions, 1 deletions

diff --git a/lib/Makefile b/lib/Makefile
index 6c98f9a6..ddedd37f 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 00000000..a6346643
--- /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@intel.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);
+}