| /* |
| * q_rtlim.c RTLIM. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <syslog.h> |
| #include <fcntl.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <arpa/inet.h> |
| #include <string.h> |
| |
| #include "utils.h" |
| #include "tc_util.h" |
| |
| static void explain(void) |
| { |
| fprintf(stderr, |
| "Usage: ... rlim limit PACKETS rate KBPS [ overhead BYTES ]\n"); |
| } |
| |
| static void explain1(char *arg) |
| { |
| fprintf(stderr, "Illegal \"%s\"\n", arg); |
| } |
| |
| |
| #define usage() return(-1) |
| |
| static int rlim_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) |
| { |
| unsigned x; |
| struct tc_rlim_qopt opt = { |
| .overhead = 24, /* Ether IPG + Preamble + CRC */ |
| }; |
| struct rtattr *tail; |
| |
| while (argc > 0) { |
| if (matches(*argv, "limit") == 0) { |
| NEXT_ARG(); |
| if (opt.limit) { |
| fprintf(stderr, "Double \"limit\" spec\n"); |
| return -1; |
| } |
| if (get_size(&opt.limit, *argv)) { |
| explain1("limit"); |
| return -1; |
| } |
| } else if (strcmp(*argv, "rate") == 0) { |
| NEXT_ARG(); |
| if (opt.rate) { |
| fprintf(stderr, "Double \"rate\" spec\n"); |
| return -1; |
| } |
| |
| if (get_rate(&x, *argv)) { |
| explain1("rate"); |
| return -1; |
| } |
| opt.rate = x; |
| } else if (strcmp(*argv, "help") == 0) { |
| explain(); |
| return -1; |
| } else { |
| fprintf(stderr, "What is \"%s\"?\n", *argv); |
| explain(); |
| return -1; |
| } |
| argc--; argv++; |
| } |
| |
| if (opt.rate == 0) { |
| fprintf(stderr, "\"rate\" is required.\n"); |
| return -1; |
| } |
| |
| if (opt.limit == 0) |
| opt.limit = 1000; |
| |
| tail = NLMSG_TAIL(n); |
| addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
| addattr_l(n, 2024, TCA_RLIM_PARMS, &opt, sizeof(opt)); |
| tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
| |
| return 0; |
| } |
| |
| static int rlim_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) |
| { |
| struct rtattr *tb[TCA_RLIM_PARMS+1]; |
| struct tc_rlim_qopt *qopt; |
| SPRINT_BUF(b1); |
| SPRINT_BUF(b2); |
| |
| if (opt == NULL) |
| return 0; |
| |
| parse_rtattr_nested(tb, TCA_RLIM_PARMS, opt); |
| if (tb[TCA_RLIM_PARMS] == NULL) |
| return -1; |
| |
| qopt = RTA_DATA(tb[TCA_RLIM_PARMS]); |
| if (RTA_PAYLOAD(tb[TCA_RLIM_PARMS]) < sizeof(*qopt)) |
| return -1; |
| |
| fprintf(f, "limit %s rate %s overhead %u", |
| sprint_size(qopt->limit, b1), |
| sprint_rate(qopt->rate, b2), |
| qopt->overhead); |
| |
| return 0; |
| } |
| |
| struct qdisc_util rlim_qdisc_util = { |
| .id = "rlim", |
| .parse_qopt = rlim_parse_opt, |
| .print_qopt = rlim_print_opt, |
| }; |
| |