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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>
#include <ynl.h>
#include <net/if.h>
#include "netdev-user.h"
/* netdev genetlink family code sample
* This sample shows off basics of the netdev family but also notification
* handling, hence the somewhat odd UI. We subscribe to notifications first
* then wait for ifc selection, so the socket may already accumulate
* notifications as we wait. This allows us to test that YNL can handle
* requests and notifications getting interleaved.
*/
static void netdev_print_device(struct netdev_dev_get_rsp *d, unsigned int op)
{
char ifname[IF_NAMESIZE];
const char *name;
if (!d->_present.ifindex)
return;
name = if_indextoname(d->ifindex, ifname);
if (name)
printf("%8s", name);
printf("[%d]\t", d->ifindex);
if (!d->_present.xdp_features)
return;
printf("xdp-features (%llx):", d->xdp_features);
for (int i = 0; d->xdp_features >= 1U << i; i++) {
if (d->xdp_features & (1U << i))
printf(" %s", netdev_xdp_act_str(1 << i));
}
printf(" xdp-rx-metadata-features (%llx):", d->xdp_rx_metadata_features);
for (int i = 0; d->xdp_rx_metadata_features >= 1U << i; i++) {
if (d->xdp_rx_metadata_features & (1U << i))
printf(" %s", netdev_xdp_rx_metadata_str(1 << i));
}
printf(" xsk-features (%llx):", d->xsk_features);
for (int i = 0; d->xsk_features >= 1U << i; i++) {
if (d->xsk_features & (1U << i))
printf(" %s", netdev_xsk_flags_str(1 << i));
}
printf(" xdp-zc-max-segs=%u", d->xdp_zc_max_segs);
name = netdev_op_str(op);
if (name)
printf(" (ntf: %s)", name);
printf("\n");
}
int main(int argc, char **argv)
{
struct netdev_dev_get_list *devs;
struct ynl_ntf_base_type *ntf;
struct ynl_error yerr;
struct ynl_sock *ys;
int ifindex = 0;
if (argc > 1)
ifindex = strtol(argv[1], NULL, 0);
ys = ynl_sock_create(&ynl_netdev_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return 1;
}
if (ynl_subscribe(ys, "mgmt"))
goto err_close;
printf("Select ifc ($ifindex; or 0 = dump; or -2 ntf check): ");
scanf("%d", &ifindex);
if (ifindex > 0) {
struct netdev_dev_get_req *req;
struct netdev_dev_get_rsp *d;
req = netdev_dev_get_req_alloc();
netdev_dev_get_req_set_ifindex(req, ifindex);
d = netdev_dev_get(ys, req);
netdev_dev_get_req_free(req);
if (!d)
goto err_close;
netdev_print_device(d, 0);
netdev_dev_get_rsp_free(d);
} else if (!ifindex) {
devs = netdev_dev_get_dump(ys);
if (!devs)
goto err_close;
if (ynl_dump_empty(devs))
fprintf(stderr, "Error: no devices reported\n");
ynl_dump_foreach(devs, d)
netdev_print_device(d, 0);
netdev_dev_get_list_free(devs);
} else if (ifindex == -2) {
ynl_ntf_check(ys);
}
while ((ntf = ynl_ntf_dequeue(ys))) {
netdev_print_device((struct netdev_dev_get_rsp *)&ntf->data,
ntf->cmd);
ynl_ntf_free(ntf);
}
ynl_sock_destroy(ys);
return 0;
err_close:
fprintf(stderr, "YNL: %s\n", ys->err.msg);
ynl_sock_destroy(ys);
return 2;
}
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