diff options
Diffstat (limited to 'src/xdp/xdp_prog_user.c')
| -rw-r--r-- | src/xdp/xdp_prog_user.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/src/xdp/xdp_prog_user.c b/src/xdp/xdp_prog_user.c deleted file mode 100644 index c47d2977d..000000000 --- a/src/xdp/xdp_prog_user.c +++ /dev/null @@ -1,182 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -static const char *__doc__ = "XDP redirect helper\n" - " - Allows to populate/query tx_port and redirect_params maps\n"; - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <getopt.h> -#include <stdbool.h> - -#include <locale.h> -#include <unistd.h> -#include <time.h> - -#include <bpf/bpf.h> -#include <bpf/libbpf.h> - -#include <net/if.h> -#include <linux/if_ether.h> -#include <linux/if_link.h> /* depend on kernel-headers installed */ - -#include "common/common_params.h" -#include "common/common_user_bpf_xdp.h" -#include "common/common_libbpf.h" - -#include "common/xdp_stats_kern_user.h" - -static const struct option_wrapper long_options[] = { - - {{"help", no_argument, NULL, 'h' }, - "Show help", false}, - - {{"dev", required_argument, NULL, 'd' }, - "Operate on device <ifname>", "<ifname>", true}, - - {{"redirect-dev", required_argument, NULL, 'r' }, - "Redirect to device <ifname>", "<ifname>", true}, - - {{"src-mac", required_argument, NULL, 'L' }, - "Source MAC address of <dev>", "<mac>", true }, - - {{"dest-mac", required_argument, NULL, 'R' }, - "Destination MAC address of <redirect-dev>", "<mac>", true }, - - {{"quiet", no_argument, NULL, 'q' }, - "Quiet mode (no output)"}, - - {{0, 0, NULL, 0 }, NULL, false} -}; - -static int parse_u8(char *str, unsigned char *x) -{ - unsigned long z; - - z = strtoul(str, 0, 16); - if (z > 0xff) - return -1; - - if (x) - *x = z; - - return 0; -} - -static int parse_mac(char *str, unsigned char mac[ETH_ALEN]) -{ - if (parse_u8(str, &mac[0]) < 0) - return -1; - if (parse_u8(str + 3, &mac[1]) < 0) - return -1; - if (parse_u8(str + 6, &mac[2]) < 0) - return -1; - if (parse_u8(str + 9, &mac[3]) < 0) - return -1; - if (parse_u8(str + 12, &mac[4]) < 0) - return -1; - if (parse_u8(str + 15, &mac[5]) < 0) - return -1; - - return 0; -} - -static int write_iface_params(int map_fd, unsigned char *src, unsigned char *dest) -{ - if (bpf_map_update_elem(map_fd, src, dest, 0) < 0) { - fprintf(stderr, - "WARN: Failed to update bpf map file: err(%d):%s\n", - errno, strerror(errno)); - return -1; - } - - printf("forward: %02x:%02x:%02x:%02x:%02x:%02x -> %02x:%02x:%02x:%02x:%02x:%02x\n", - src[0], src[1], src[2], src[3], src[4], src[5], - dest[0], dest[1], dest[2], dest[3], dest[4], dest[5] - ); - - return 0; -} - -#ifndef PATH_MAX -#define PATH_MAX 4096 -#endif - -const char *pin_basedir = "/sys/fs/bpf"; - -int main(int argc, char **argv) -{ - int i; - int len; - int map_fd; - bool redirect_map; - char pin_dir[PATH_MAX]; - unsigned char src[ETH_ALEN]; - unsigned char dest[ETH_ALEN]; - - struct config cfg = { - .ifindex = -1, - .redirect_ifindex = -1, - }; - - /* Cmdline options can change progsec */ - parse_cmdline_args(argc, argv, long_options, &cfg, __doc__); - - redirect_map = (cfg.ifindex > 0) && (cfg.redirect_ifindex > 0); - - if (cfg.redirect_ifindex > 0 && cfg.ifindex == -1) { - fprintf(stderr, "ERR: required option --dev missing\n\n"); - usage(argv[0], __doc__, long_options, (argc == 1)); - return EXIT_FAIL_OPTION; - } - - len = snprintf(pin_dir, PATH_MAX, "%s/%s", pin_basedir, cfg.ifname); - if (len < 0) { - fprintf(stderr, "ERR: creating pin dirname\n"); - return EXIT_FAIL_OPTION; - } - - if (parse_mac(cfg.src_mac, src) < 0) { - fprintf(stderr, "ERR: can't parse mac address %s\n", cfg.src_mac); - return EXIT_FAIL_OPTION; - } - - if (parse_mac(cfg.dest_mac, dest) < 0) { - fprintf(stderr, "ERR: can't parse mac address %s\n", cfg.dest_mac); - return EXIT_FAIL_OPTION; - } - - /* Open the tx_port map corresponding to the cfg.ifname interface */ - map_fd = open_bpf_map_file(pin_dir, "tx_port", NULL); - if (map_fd < 0) { - return EXIT_FAIL_BPF; - } - - printf("map dir: %s\n", pin_dir); - - if (redirect_map) { - /* setup a virtual port for the static redirect */ - i = 0; - bpf_map_update_elem(map_fd, &i, &cfg.redirect_ifindex, 0); - printf("redirect from ifnum=%d to ifnum=%d\n", cfg.ifindex, cfg.redirect_ifindex); - - /* Open the redirect_params map */ - map_fd = open_bpf_map_file(pin_dir, "redirect_params", NULL); - if (map_fd < 0) { - return EXIT_FAIL_BPF; - } - - /* Setup the mapping containing MAC addresses */ - if (write_iface_params(map_fd, src, dest) < 0) { - fprintf(stderr, "can't write iface params\n"); - return 1; - } - } else { - /* setup 1-1 mapping for the dynamic router */ - for (i = 1; i < 256; ++i) - bpf_map_update_elem(map_fd, &i, &i, 0); - } - - return EXIT_OK; -} |