diff options
Diffstat (limited to '')
| -rw-r--r-- | ip/ipaddrlabel.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/ip/ipaddrlabel.c b/ip/ipaddrlabel.c new file mode 100644 index 0000000..b045827 --- /dev/null +++ b/ip/ipaddrlabel.c @@ -0,0 +1,260 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * ipaddrlabel.c "ip addrlabel" + * + * Copyright (C)2007 USAGI/WIDE Project + * + * Based on iprule.c. + * + * Authors: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <netinet/ip.h> +#include <arpa/inet.h> +#include <string.h> +#include <linux/types.h> +#include <linux/if_addrlabel.h> + +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" +#include "json_print.h" + +#define IFAL_RTA(r) ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrlblmsg)))) +#define IFAL_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrlblmsg)) + +extern struct rtnl_handle rth; + +static void usage(void) __attribute__((noreturn)); + +static void usage(void) +{ + fprintf(stderr, + "Usage: ip addrlabel { add | del } prefix PREFIX [ dev DEV ] [ label LABEL ]\n" + " ip addrlabel [ list | flush | help ]\n"); + exit(-1); +} + +int print_addrlabel(struct nlmsghdr *n, void *arg) +{ + struct ifaddrlblmsg *ifal = NLMSG_DATA(n); + int len = n->nlmsg_len; + struct rtattr *tb[IFAL_MAX+1]; + + if (n->nlmsg_type != RTM_NEWADDRLABEL && n->nlmsg_type != RTM_DELADDRLABEL) + return 0; + + len -= NLMSG_LENGTH(sizeof(*ifal)); + if (len < 0) + return -1; + + parse_rtattr(tb, IFAL_MAX, IFAL_RTA(ifal), len); + + open_json_object(NULL); + if (n->nlmsg_type == RTM_DELADDRLABEL) + print_bool(PRINT_ANY, "deleted", "Deleted ", true); + + if (tb[IFAL_ADDRESS]) { + const char *host + = format_host_rta(ifal->ifal_family, + tb[IFAL_ADDRESS]); + + print_string(PRINT_FP, NULL, "prefix ", NULL); + print_color_string(PRINT_ANY, + ifa_family_color(ifal->ifal_family), + "address", "%s", host); + + print_uint(PRINT_ANY, "prefixlen", "/%u ", + ifal->ifal_prefixlen); + } + + if (ifal->ifal_index) { + print_string(PRINT_FP, NULL, "dev ", NULL); + print_color_string(PRINT_ANY, COLOR_IFNAME, + "ifname", "%s ", + ll_index_to_name(ifal->ifal_index)); + } + + if (tb[IFAL_LABEL] && RTA_PAYLOAD(tb[IFAL_LABEL]) == sizeof(uint32_t)) { + uint32_t label = rta_getattr_u32(tb[IFAL_LABEL]); + + print_uint(PRINT_ANY, + "label", "label %u ", label); + } + print_string(PRINT_FP, NULL, "\n", ""); + close_json_object(); + + return 0; +} + +static int ipaddrlabel_list(int argc, char **argv) +{ + int af = preferred_family; + + if (af == AF_UNSPEC) + af = AF_INET6; + + if (argc > 0) { + fprintf(stderr, "\"ip addrlabel show\" does not take any arguments.\n"); + return -1; + } + + if (rtnl_addrlbldump_req(&rth, af) < 0) { + perror("Cannot send dump request"); + return 1; + } + + new_json_obj(json); + if (rtnl_dump_filter(&rth, print_addrlabel, stdout) < 0) { + fprintf(stderr, "Dump terminated\n"); + delete_json_obj(); + return 1; + } + delete_json_obj(); + + return 0; +} + + +static int ipaddrlabel_modify(int cmd, int argc, char **argv) +{ + struct { + struct nlmsghdr n; + struct ifaddrlblmsg ifal; + char buf[1024]; + } req = { + .n.nlmsg_type = cmd, + .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrlblmsg)), + .n.nlmsg_flags = NLM_F_REQUEST, + .ifal.ifal_family = preferred_family, + }; + + inet_prefix prefix = {}; + uint32_t label = 0xffffffffUL; + char *p = NULL; + char *l = NULL; + + if (cmd == RTM_NEWADDRLABEL) { + req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL; + } + + while (argc > 0) { + if (strcmp(*argv, "prefix") == 0) { + NEXT_ARG(); + p = *argv; + get_prefix(&prefix, *argv, preferred_family); + } else if (strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + if ((req.ifal.ifal_index = ll_name_to_index(*argv)) == 0) + invarg("dev is invalid\n", *argv); + } else if (strcmp(*argv, "label") == 0) { + NEXT_ARG(); + l = *argv; + if (get_u32(&label, *argv, 0) || label == 0xffffffffUL) + invarg("label is invalid\n", *argv); + } + argc--; + argv++; + } + if (p == NULL) { + fprintf(stderr, "Not enough information: \"prefix\" argument is required.\n"); + return -1; + } + if (l == NULL) { + fprintf(stderr, "Not enough information: \"label\" argument is required.\n"); + return -1; + } + addattr32(&req.n, sizeof(req), IFAL_LABEL, label); + addattr_l(&req.n, sizeof(req), IFAL_ADDRESS, &prefix.data, prefix.bytelen); + req.ifal.ifal_prefixlen = prefix.bitlen; + + if (req.ifal.ifal_family == AF_UNSPEC) + req.ifal.ifal_family = AF_INET6; + + if (rtnl_talk(&rth, &req.n, NULL) < 0) + return -2; + + return 0; +} + + +static int flush_addrlabel(struct nlmsghdr *n, void *arg) +{ + struct rtnl_handle rth2; + struct rtmsg *r = NLMSG_DATA(n); + int len = n->nlmsg_len; + struct rtattr *tb[IFAL_MAX+1]; + + len -= NLMSG_LENGTH(sizeof(*r)); + if (len < 0) + return -1; + + parse_rtattr(tb, IFAL_MAX, RTM_RTA(r), len); + + if (tb[IFAL_ADDRESS]) { + n->nlmsg_type = RTM_DELADDRLABEL; + n->nlmsg_flags = NLM_F_REQUEST; + + if (rtnl_open(&rth2, 0) < 0) + return -1; + + if (rtnl_talk(&rth2, n, NULL) < 0) + return -2; + + rtnl_close(&rth2); + } + + return 0; +} + +static int ipaddrlabel_flush(int argc, char **argv) +{ + int af = preferred_family; + + if (af == AF_UNSPEC) + af = AF_INET6; + + if (argc > 0) { + fprintf(stderr, "\"ip addrlabel flush\" does not allow extra arguments\n"); + return -1; + } + + if (rtnl_addrlbldump_req(&rth, af) < 0) { + perror("Cannot send dump request"); + return -1; + } + + if (rtnl_dump_filter(&rth, flush_addrlabel, NULL) < 0) { + fprintf(stderr, "Flush terminated\n"); + return -1; + } + + return 0; +} + +int do_ipaddrlabel(int argc, char **argv) +{ + if (argc < 1) { + return ipaddrlabel_list(0, NULL); + } else if (matches(argv[0], "list") == 0 || + matches(argv[0], "lst") == 0 || + matches(argv[0], "show") == 0) { + return ipaddrlabel_list(argc-1, argv+1); + } else if (matches(argv[0], "add") == 0) { + return ipaddrlabel_modify(RTM_NEWADDRLABEL, argc-1, argv+1); + } else if (matches(argv[0], "delete") == 0) { + return ipaddrlabel_modify(RTM_DELADDRLABEL, argc-1, argv+1); + } else if (matches(argv[0], "flush") == 0) { + return ipaddrlabel_flush(argc-1, argv+1); + } else if (matches(argv[0], "help") == 0) + usage(); + + fprintf(stderr, "Command \"%s\" is unknown, try \"ip addrlabel help\".\n", *argv); + exit(-1); +} |