1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <string.h>
4
5#include <ynl.h>
6
7#include <net/if.h>
8
9#include "netdev-user.h"
10
11/* netdev genetlink family code sample
12 * This sample shows off basics of the netdev family but also notification
13 * handling, hence the somewhat odd UI. We subscribe to notifications first
14 * then wait for ifc selection, so the socket may already accumulate
15 * notifications as we wait. This allows us to test that YNL can handle
16 * requests and notifications getting interleaved.
17 */
18
19static void netdev_print_device(struct netdev_dev_get_rsp *d, unsigned int op)
20{
21	char ifname[IF_NAMESIZE];
22	const char *name;
23
24	if (!d->_present.ifindex)
25		return;
26
27	name = if_indextoname(d->ifindex, ifname);
28	if (name)
29		printf("%8s", name);
30	printf("[%d]\t", d->ifindex);
31
32	if (!d->_present.xdp_features)
33		return;
34
35	printf("%llx:", d->xdp_features);
36	for (int i = 0; d->xdp_features > 1U << i; i++) {
37		if (d->xdp_features & (1U << i))
38			printf(" %s", netdev_xdp_act_str(1 << i));
39	}
40
41	printf(" xdp-zc-max-segs=%u", d->xdp_zc_max_segs);
42
43	name = netdev_op_str(op);
44	if (name)
45		printf(" (ntf: %s)", name);
46	printf("\n");
47}
48
49int main(int argc, char **argv)
50{
51	struct netdev_dev_get_list *devs;
52	struct ynl_ntf_base_type *ntf;
53	struct ynl_error yerr;
54	struct ynl_sock *ys;
55	int ifindex = 0;
56
57	if (argc > 1)
58		ifindex = strtol(argv[1], NULL, 0);
59
60	ys = ynl_sock_create(&ynl_netdev_family, &yerr);
61	if (!ys) {
62		fprintf(stderr, "YNL: %s\n", yerr.msg);
63		return 1;
64	}
65
66	if (ynl_subscribe(ys, "mgmt"))
67		goto err_close;
68
69	printf("Select ifc ($ifindex; or 0 = dump; or -2 ntf check): ");
70	scanf("%d", &ifindex);
71
72	if (ifindex > 0) {
73		struct netdev_dev_get_req *req;
74		struct netdev_dev_get_rsp *d;
75
76		req = netdev_dev_get_req_alloc();
77		netdev_dev_get_req_set_ifindex(req, ifindex);
78
79		d = netdev_dev_get(ys, req);
80		netdev_dev_get_req_free(req);
81		if (!d)
82			goto err_close;
83
84		netdev_print_device(d, 0);
85		netdev_dev_get_rsp_free(d);
86	} else if (!ifindex) {
87		devs = netdev_dev_get_dump(ys);
88		if (!devs)
89			goto err_close;
90
91		ynl_dump_foreach(devs, d)
92			netdev_print_device(d, 0);
93		netdev_dev_get_list_free(devs);
94	} else if (ifindex == -2) {
95		ynl_ntf_check(ys);
96	}
97	while ((ntf = ynl_ntf_dequeue(ys))) {
98		netdev_print_device((struct netdev_dev_get_rsp *)&ntf->data,
99				    ntf->cmd);
100		ynl_ntf_free(ntf);
101	}
102
103	ynl_sock_destroy(ys);
104	return 0;
105
106err_close:
107	fprintf(stderr, "YNL: %s\n", ys->err.msg);
108	ynl_sock_destroy(ys);
109	return 2;
110}
111