1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2016 John Fastabend <john.r.fastabend@intel.com>
4 static const char *__doc__ =
5 "XDP redirect tool, using bpf_redirect helper\n"
6 "Usage: xdp_redirect <IFINDEX|IFNAME>_IN <IFINDEX|IFNAME>_OUT\n";
9 #include <linux/if_link.h>
21 #include <sys/resource.h>
23 #include <bpf/libbpf.h>
25 #include "xdp_sample_user.h"
26 #include "xdp_redirect.skel.h"
28 static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_CNT |
29 SAMPLE_EXCEPTION_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI;
31 DEFINE_SAMPLE_INIT(xdp_redirect);
33 static const struct option long_options[] = {
34 {"help", no_argument, NULL, 'h' },
35 {"skb-mode", no_argument, NULL, 'S' },
36 {"force", no_argument, NULL, 'F' },
37 {"stats", no_argument, NULL, 's' },
38 {"interval", required_argument, NULL, 'i' },
39 {"verbose", no_argument, NULL, 'v' },
43 int main(int argc, char **argv)
45 int ifindex_in, ifindex_out, opt;
46 char str[2 * IF_NAMESIZE + 1];
47 char ifname_out[IF_NAMESIZE];
48 char ifname_in[IF_NAMESIZE];
49 int ret = EXIT_FAIL_OPTION;
50 unsigned long interval = 2;
51 struct xdp_redirect *skel;
56 while ((opt = getopt_long(argc, argv, "hSFi:vs",
57 long_options, NULL)) != -1) {
61 mask &= ~(SAMPLE_DEVMAP_XMIT_CNT |
62 SAMPLE_DEVMAP_XMIT_CNT_MULTI);
68 interval = strtoul(optarg, NULL, 0);
74 mask |= SAMPLE_REDIRECT_CNT;
79 sample_usage(argv, long_options, __doc__, mask, error);
84 if (argc <= optind + 1) {
85 sample_usage(argv, long_options, __doc__, mask, true);
89 ifindex_in = if_nametoindex(argv[optind]);
91 ifindex_in = strtoul(argv[optind], NULL, 0);
93 ifindex_out = if_nametoindex(argv[optind + 1]);
95 ifindex_out = strtoul(argv[optind + 1], NULL, 0);
97 if (!ifindex_in || !ifindex_out) {
98 fprintf(stderr, "Bad interface index or name\n");
99 sample_usage(argv, long_options, __doc__, mask, true);
103 skel = xdp_redirect__open();
105 fprintf(stderr, "Failed to xdp_redirect__open: %s\n", strerror(errno));
110 ret = sample_init_pre_load(skel);
112 fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret));
117 skel->rodata->from_match[0] = ifindex_in;
118 skel->rodata->to_match[0] = ifindex_out;
119 skel->rodata->ifindex_out = ifindex_out;
121 ret = xdp_redirect__load(skel);
123 fprintf(stderr, "Failed to xdp_redirect__load: %s\n", strerror(errno));
128 ret = sample_init(skel, mask);
130 fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret));
136 if (sample_install_xdp(skel->progs.xdp_redirect_prog, ifindex_in,
140 /* Loading dummy XDP prog on out-device */
141 sample_install_xdp(skel->progs.xdp_redirect_dummy_prog, ifindex_out,
145 if (!if_indextoname(ifindex_in, ifname_in)) {
146 fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_in,
151 if (!if_indextoname(ifindex_out, ifname_out)) {
152 fprintf(stderr, "Failed to if_indextoname for %d: %s\n", ifindex_out,
157 safe_strncpy(str, get_driver_name(ifindex_in), sizeof(str));
158 printf("Redirecting from %s (ifindex %d; driver %s) to %s (ifindex %d; driver %s)\n",
159 ifname_in, ifindex_in, str, ifname_out, ifindex_out, get_driver_name(ifindex_out));
160 snprintf(str, sizeof(str), "%s->%s", ifname_in, ifname_out);
162 ret = sample_run(interval, NULL, NULL);
164 fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret));
170 xdp_redirect__destroy(skel);