| /* |
| * q_netem.c NETEM. |
| * |
| * 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: Stephen Hemminger <shemminger@osdl.org> |
| * |
| */ |
| |
| #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: ... netem latency TIME [ jitter TIME ] [ limit PACKETS] \n" \ |
| " [ loss PERCENT ] [ duplicate PERCENT ]\n" \ |
| " [ gap PACKETS]\n"); |
| } |
| |
| static void explain1(const char *arg) |
| { |
| fprintf(stderr, "Illegal \"%s\"\n", arg); |
| } |
| |
| #define usage() return(-1) |
| |
| static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv, |
| struct nlmsghdr *n) |
| { |
| struct tc_netem_qopt opt; |
| int ok = 0; |
| |
| memset(&opt, 0, sizeof(opt)); |
| opt.limit = 1000; |
| |
| while (argc > 0) { |
| if (matches(*argv, "limit") == 0) { |
| NEXT_ARG(); |
| if (get_size(&opt.limit, *argv)) { |
| explain1("limit"); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "latency") == 0) { |
| NEXT_ARG(); |
| if (get_usecs(&opt.latency, *argv)) { |
| explain1("latency"); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "loss") == 0) { |
| NEXT_ARG(); |
| if (get_percent(&opt.loss, *argv)) { |
| explain1("loss"); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "gap") == 0) { |
| NEXT_ARG(); |
| if (get_u32(&opt.gap, *argv, 0)) { |
| explain1("gap"); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "duplicate") == 0) { |
| NEXT_ARG(); |
| if (get_percent(&opt.duplicate, *argv)) { |
| explain1("duplicate"); |
| return -1; |
| } |
| ok++; |
| } else if (matches(*argv, "jitter") == 0) { |
| NEXT_ARG(); |
| if (get_usecs(&opt.jitter, *argv)) { |
| explain1("jitter"); |
| return -1; |
| } |
| ok++; |
| } else if (strcmp(*argv, "help") == 0) { |
| explain(); |
| return -1; |
| } else { |
| fprintf(stderr, "What is \"%s\"?\n", *argv); |
| explain(); |
| return -1; |
| } |
| argc--; argv++; |
| } |
| |
| return ok ? addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)) : 0; |
| } |
| |
| static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) |
| { |
| struct tc_netem_qopt *qopt; |
| SPRINT_BUF(b1); |
| |
| if (opt == NULL) |
| return 0; |
| |
| if (RTA_PAYLOAD(opt) < sizeof(*qopt)) |
| return -1; |
| |
| qopt = RTA_DATA(opt); |
| |
| fprintf(f, "limit %d", qopt->limit); |
| if (qopt->latency) |
| fprintf(f, " latency %s", |
| sprint_usecs(qopt->latency, b1)); |
| if (qopt->jitter) |
| fprintf(f, " jitter %s", sprint_usecs(qopt->jitter, b1)); |
| |
| if (qopt->loss) |
| fprintf(f, " loss %s", |
| sprint_percent(qopt->loss, b1)); |
| if (qopt->gap) |
| fprintf(f, " gap %lu", (unsigned long)qopt->gap); |
| |
| |
| return 0; |
| } |
| |
| static int netem_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats) |
| { |
| return 0; |
| } |
| |
| struct qdisc_util netem_util = { |
| .id = "netem", |
| .parse_qopt = netem_parse_opt, |
| .print_qopt = netem_print_opt, |
| .print_xstats = netem_print_xstats, |
| }; |