129 lines · c
1// SPDX-License-Identifier: GPL-2.02#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 sample12 * This sample shows off basics of the netdev family but also notification13 * handling, hence the somewhat odd UI. We subscribe to notifications first14 * then wait for ifc selection, so the socket may already accumulate15 * notifications as we wait. This allows us to test that YNL can handle16 * 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 if (scanf("%d", &ifindex) != 1) {83 fprintf(stderr, "Error: unable to parse input\n");84 goto err_destroy;85 }86 87 if (ifindex > 0) {88 struct netdev_dev_get_req *req;89 struct netdev_dev_get_rsp *d;90 91 req = netdev_dev_get_req_alloc();92 netdev_dev_get_req_set_ifindex(req, ifindex);93 94 d = netdev_dev_get(ys, req);95 netdev_dev_get_req_free(req);96 if (!d)97 goto err_close;98 99 netdev_print_device(d, 0);100 netdev_dev_get_rsp_free(d);101 } else if (!ifindex) {102 devs = netdev_dev_get_dump(ys);103 if (!devs)104 goto err_close;105 106 if (ynl_dump_empty(devs))107 fprintf(stderr, "Error: no devices reported\n");108 ynl_dump_foreach(devs, d)109 netdev_print_device(d, 0);110 netdev_dev_get_list_free(devs);111 } else if (ifindex == -2) {112 ynl_ntf_check(ys);113 }114 while ((ntf = ynl_ntf_dequeue(ys))) {115 netdev_print_device((struct netdev_dev_get_rsp *)&ntf->data,116 ntf->cmd);117 ynl_ntf_free(ntf);118 }119 120 ynl_sock_destroy(ys);121 return 0;122 123err_close:124 fprintf(stderr, "YNL: %s\n", ys->err.msg);125err_destroy:126 ynl_sock_destroy(ys);127 return 2;128}129