diff options
Diffstat (limited to 'tc/f_tcindex.c')
| -rw-r--r-- | tc/f_tcindex.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/tc/f_tcindex.c b/tc/f_tcindex.c new file mode 100644 index 0000000..ae4cbf1 --- /dev/null +++ b/tc/f_tcindex.c @@ -0,0 +1,185 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * f_tcindex.c Traffic control index filter + * + * Written 1998,1999 by Werner Almesberger + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <string.h> +#include <netinet/in.h> + +#include "utils.h" +#include "tc_util.h" + +static void explain(void) +{ + fprintf(stderr, + " Usage: ... tcindex [ hash SIZE ] [ mask MASK ] [ shift SHIFT ]\n" + " [ pass_on | fall_through ]\n" + " [ classid CLASSID ] [ action ACTION_SPEC ]\n"); +} + +static int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc, + char **argv, struct nlmsghdr *n) +{ + struct tcmsg *t = NLMSG_DATA(n); + struct rtattr *tail; + char *end; + + if (handle) { + t->tcm_handle = strtoul(handle, &end, 0); + if (*end) { + fprintf(stderr, "Illegal filter ID\n"); + return -1; + } + } + if (!argc) return 0; + tail = addattr_nest(n, 4096, TCA_OPTIONS); + while (argc) { + if (!strcmp(*argv, "hash")) { + int hash; + + NEXT_ARG(); + hash = strtoul(*argv, &end, 0); + if (*end || !hash || hash > 0x10000) { + explain(); + return -1; + } + addattr_l(n, 4096, TCA_TCINDEX_HASH, &hash, + sizeof(hash)); + } else if (!strcmp(*argv,"mask")) { + __u16 mask; + + NEXT_ARG(); + mask = strtoul(*argv, &end, 0); + if (*end) { + explain(); + return -1; + } + addattr_l(n, 4096, TCA_TCINDEX_MASK, &mask, + sizeof(mask)); + } else if (!strcmp(*argv,"shift")) { + int shift; + + NEXT_ARG(); + shift = strtoul(*argv, &end, 0); + if (*end) { + explain(); + return -1; + } + addattr_l(n, 4096, TCA_TCINDEX_SHIFT, &shift, + sizeof(shift)); + } else if (!strcmp(*argv,"fall_through")) { + int value = 1; + + addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value, + sizeof(value)); + } else if (!strcmp(*argv,"pass_on")) { + int value = 0; + + addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value, + sizeof(value)); + } else if (!strcmp(*argv,"classid")) { + __u32 handle; + + NEXT_ARG(); + if (get_tc_classid(&handle, *argv)) { + fprintf(stderr, "Illegal \"classid\"\n"); + return -1; + } + addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4); + } else if (!strcmp(*argv,"police")) { + NEXT_ARG(); + if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) { + fprintf(stderr, "Illegal \"police\"\n"); + return -1; + } + continue; + } else if (!strcmp(*argv,"action")) { + NEXT_ARG(); + if (parse_action(&argc, &argv, TCA_TCINDEX_ACT, n)) { + fprintf(stderr, "Illegal \"action\"\n"); + return -1; + } + continue; + } else { + explain(); + return -1; + } + argc--; + argv++; + } + addattr_nest_end(n, tail); + return 0; +} + + +static int tcindex_print_opt(struct filter_util *qu, FILE *f, + struct rtattr *opt, __u32 handle) +{ + struct rtattr *tb[TCA_TCINDEX_MAX+1]; + + if (opt == NULL) + return 0; + + parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt); + + if (handle != ~0) fprintf(f, "handle 0x%04x ", handle); + if (tb[TCA_TCINDEX_HASH]) { + __u16 hash; + + if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash)) + return -1; + hash = rta_getattr_u16(tb[TCA_TCINDEX_HASH]); + fprintf(f, "hash %d ", hash); + } + if (tb[TCA_TCINDEX_MASK]) { + __u16 mask; + + if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask)) + return -1; + mask = rta_getattr_u16(tb[TCA_TCINDEX_MASK]); + fprintf(f, "mask 0x%04x ", mask); + } + if (tb[TCA_TCINDEX_SHIFT]) { + int shift; + + if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift)) + return -1; + shift = rta_getattr_u32(tb[TCA_TCINDEX_SHIFT]); + fprintf(f, "shift %d ", shift); + } + if (tb[TCA_TCINDEX_FALL_THROUGH]) { + int fall_through; + + if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) < + sizeof(fall_through)) + return -1; + fall_through = rta_getattr_u32(tb[TCA_TCINDEX_FALL_THROUGH]); + fprintf(f, fall_through ? "fall_through " : "pass_on "); + } + if (tb[TCA_TCINDEX_CLASSID]) { + SPRINT_BUF(b1); + fprintf(f, "classid %s ", sprint_tc_classid(*(__u32 *) + RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1)); + } + if (tb[TCA_TCINDEX_POLICE]) { + fprintf(f, "\n"); + tc_print_police(f, tb[TCA_TCINDEX_POLICE]); + } + if (tb[TCA_TCINDEX_ACT]) { + fprintf(f, "\n"); + tc_print_action(f, tb[TCA_TCINDEX_ACT], 0); + } + return 0; +} + +struct filter_util tcindex_filter_util = { + .id = "tcindex", + .parse_fopt = tcindex_parse_opt, + .print_fopt = tcindex_print_opt, +}; |