Commit 29d34a4d authored by Jakub Kicinski's avatar Jakub Kicinski
Browse files

tools: ynl: generate code for rt-addr and add a sample 



YNL C can now generate code for simple classic netlink families.
Include rt-addr in the Makefile for generation and add a sample.

  $ ./tools/net/ynl/samples/rt-addr
              lo: 127.0.0.1
       wlp0s20f3: 192.168.1.101
              lo: ::
       wlp0s20f3: fe80::6385:be6:746e:8116
            vpn0: fe80::3597:d353:b5a7:66dd

Reviewed-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: default avatarDonald Hunter <donald.hunter@gmail.com>
Link: https://patch.msgid.link/20250410014658.782120-13-kuba@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 882e7b13

tools/net/ynl/Makefile.deps

+1 −0
Original line number Diff line number Diff line
@@ -29,4 +29,5 @@ CFLAGS_nfsd:=$(call get_hdr_inc,_LINUX_NFSD_NETLINK_H,nfsd_netlink.h) 
CFLAGS_ovs_datapath:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)

CFLAGS_ovs_flow:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)

CFLAGS_ovs_vport:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)

CFLAGS_rt-addr:=$(call get_hdr_inc,__LINUX_RTNETLINK_H,rtnetlink.h)

CFLAGS_tcp_metrics:=$(call get_hdr_inc,_LINUX_TCP_METRICS_H,tcp_metrics.h)

tools/net/ynl/generated/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -25,7 +25,7 @@ SPECS_DIR:=../../../../Documentation/netlink/specs 
GENS_PATHS=$(shell grep -nrI --files-without-match \

		'protocol: netlink' \

		$(SPECS_DIR))

GENS=$(patsubst $(SPECS_DIR)/%.yaml,%,${GENS_PATHS})

GENS=$(patsubst $(SPECS_DIR)/%.yaml,%,${GENS_PATHS}) rt-addr

SRCS=$(patsubst %,%-user.c,${GENS})

HDRS=$(patsubst %,%-user.h,${GENS})

OBJS=$(patsubst %,%-user.o,${GENS})

tools/net/ynl/samples/.gitignore

+2 −1
Original line number Diff line number Diff line
@@ -3,3 +3,4 @@ devlink 
netdev

ovs

page-pool

rt-addr

tools/net/ynl/samples/rt-addr.c

0 → 100644
+80 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

#include <stdio.h>

#include <string.h>



#include <ynl.h>



#include <arpa/inet.h>

#include <net/if.h>



#include "rt-addr-user.h"



static void rt_addr_print(struct rt_addr_getaddr_rsp *a)

{

	char ifname[IF_NAMESIZE];

	char addr_str[64];

	const char *addr;

	const char *name;



	name = if_indextoname(a->_hdr.ifa_index, ifname);

	if (name)

		printf("%16s: ", name);



	switch (a->_present.address_len) {

	case 4:

		addr = inet_ntop(AF_INET, a->address,

				 addr_str, sizeof(addr_str));

		break;

	case 16:

		addr = inet_ntop(AF_INET6, a->address,

				 addr_str, sizeof(addr_str));

		break;

	default:

		addr = NULL;

		break;

	}

	if (addr)

		printf("%s", addr);

	else

		printf("[%d]", a->_present.address_len);



	printf("\n");

}



int main(int argc, char **argv)

{

	struct rt_addr_getaddr_list *rsp;

	struct rt_addr_getaddr_req *req;

	struct ynl_error yerr;

	struct ynl_sock *ys;



	ys = ynl_sock_create(&ynl_rt_addr_family, &yerr);

	if (!ys) {

		fprintf(stderr, "YNL: %s\n", yerr.msg);

		return 1;

	}



	req = rt_addr_getaddr_req_alloc();

	if (!req)

		goto err_destroy;



	rsp = rt_addr_getaddr_dump(ys, req);

	rt_addr_getaddr_req_free(req);

	if (!rsp)

		goto err_close;



	if (ynl_dump_empty(rsp))

		fprintf(stderr, "Error: no addresses reported\n");

	ynl_dump_foreach(rsp, addr)

		rt_addr_print(addr);

	rt_addr_getaddr_list_free(rsp);



	ynl_sock_destroy(ys);

	return 0;



err_close:

	fprintf(stderr, "YNL: %s\n", ys->err.msg);

err_destroy:

	ynl_sock_destroy(ys);

	return 2;

}