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("xdp-features (%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-rx-metadata-features (%llx):", d->xdp_rx_metadata_features);
 42	for (int i = 0; d->xdp_rx_metadata_features >= 1U << i; i++) {
 43		if (d->xdp_rx_metadata_features & (1U << i))
 44			printf(" %s", netdev_xdp_rx_metadata_str(1 << i));
 45	}
 46
 47	printf(" xsk-features (%llx):", d->xsk_features);
 48	for (int i = 0; d->xsk_features >= 1U << i; i++) {
 49		if (d->xsk_features & (1U << i))
 50			printf(" %s", netdev_xsk_flags_str(1 << i));
 51	}
 52
 53	printf(" xdp-zc-max-segs=%u", d->xdp_zc_max_segs);
 54
 55	name = netdev_op_str(op);
 56	if (name)
 57		printf(" (ntf: %s)", name);
 58	printf("\n");
 59}
 60
 61int main(int argc, char **argv)
 62{
 63	struct netdev_dev_get_list *devs;
 64	struct ynl_ntf_base_type *ntf;
 65	struct ynl_error yerr;
 66	struct ynl_sock *ys;
 67	int ifindex = 0;
 68
 69	if (argc > 1)
 70		ifindex = strtol(argv[1], NULL, 0);
 71
 72	ys = ynl_sock_create(&ynl_netdev_family, &yerr);
 73	if (!ys) {
 74		fprintf(stderr, "YNL: %s\n", yerr.msg);
 75		return 1;
 76	}
 77
 78	if (ynl_subscribe(ys, "mgmt"))
 79		goto err_close;
 80
 81	printf("Select ifc ($ifindex; or 0 = dump; or -2 ntf check): ");
 82	scanf("%d", &ifindex);
 83
 84	if (ifindex > 0) {
 85		struct netdev_dev_get_req *req;
 86		struct netdev_dev_get_rsp *d;
 87
 88		req = netdev_dev_get_req_alloc();
 89		netdev_dev_get_req_set_ifindex(req, ifindex);
 90
 91		d = netdev_dev_get(ys, req);
 92		netdev_dev_get_req_free(req);
 93		if (!d)
 94			goto err_close;
 95
 96		netdev_print_device(d, 0);
 97		netdev_dev_get_rsp_free(d);
 98	} else if (!ifindex) {
 99		devs = netdev_dev_get_dump(ys);
100		if (!devs)
101			goto err_close;
102
103		ynl_dump_foreach(devs, d)
104			netdev_print_device(d, 0);
105		netdev_dev_get_list_free(devs);
106	} else if (ifindex == -2) {
107		ynl_ntf_check(ys);
108	}
109	while ((ntf = ynl_ntf_dequeue(ys))) {
110		netdev_print_device((struct netdev_dev_get_rsp *)&ntf->data,
111				    ntf->cmd);
112		ynl_ntf_free(ntf);
113	}
114
115	ynl_sock_destroy(ys);
116	return 0;
117
118err_close:
119	fprintf(stderr, "YNL: %s\n", ys->err.msg);
120	ynl_sock_destroy(ys);
121	return 2;
122}