| /* |
| * m_police.c Parse/print policing module options. |
| * |
| * This program is free software; you can u32istribute 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> |
| * FIXES: 19990619 - J Hadi Salim (hadi@cyberus.ca) |
| * simple addattr packaging fix. |
| * 2002: J Hadi Salim - Add tc action extensions syntax |
| * |
| */ |
| |
| #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" |
| |
| struct action_util police_action_util = { |
| .id = "police", |
| .parse_aopt = act_parse_police, |
| .print_aopt = print_police, |
| }; |
| |
| static void usage(void) |
| { |
| fprintf(stderr, "Usage: ... police rate BPS burst BYTES[/BYTES] [ mtu BYTES[/BYTES] ]\n"); |
| fprintf(stderr, " [ peakrate BPS ] [ avrate BPS ] [ overhead BYTES ]\n"); |
| fprintf(stderr, " [ linklayer TYPE ] [ CONTROL ]\n"); |
| |
| fprintf(stderr, "Where: CONTROL := conform-exceed <EXCEEDACT>[/NOTEXCEEDACT]\n"); |
| fprintf(stderr, " Define how to handle packets which exceed (<EXCEEDACT>)\n"); |
| fprintf(stderr, " or conform (<NOTEXCEEDACT>) the configured bandwidth limit.\n"); |
| fprintf(stderr, " EXCEEDACT/NOTEXCEEDACT := { pipe | ok | reclassify | drop | continue }\n"); |
| exit(-1); |
| } |
| |
| static void explain1(char *arg) |
| { |
| fprintf(stderr, "Illegal \"%s\"\n", arg); |
| } |
| |
| static int get_police_result(int *action, int *result, char *arg) |
| { |
| char *p = strchr(arg, '/'); |
| |
| if (p) |
| *p = 0; |
| |
| if (action_a2n(arg, action, true)) { |
| if (p) |
| *p = '/'; |
| return -1; |
| } |
| |
| if (p) { |
| *p = '/'; |
| if (action_a2n(p+1, result, true)) |
| return -1; |
| } |
| return 0; |
| } |
| |
| int act_parse_police(struct action_util *a, int *argc_p, char ***argv_p, |
| int tca_id, struct nlmsghdr *n) |
| { |
| int argc = *argc_p; |
| char **argv = *argv_p; |
| int res = -1; |
| int ok = 0; |
| struct tc_police p = { .action = TC_POLICE_RECLASSIFY }; |
| __u32 rtab[256]; |
| __u32 ptab[256]; |
| __u32 avrate = 0; |
| int presult = 0; |
| unsigned buffer = 0, mtu = 0, mpu = 0; |
| unsigned short overhead = 0; |
| unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */ |
| int Rcell_log = -1, Pcell_log = -1; |
| struct rtattr *tail; |
| |
| if (a) /* new way of doing things */ |
| NEXT_ARG(); |
| |
| if (argc <= 0) |
| return -1; |
| |
| while (argc > 0) { |
| |
| if (matches(*argv, "index") == 0) { |
| NEXT_ARG(); |
| if (get_u32(&p.index, *argv, 10)) { |
| fprintf(stderr, "Illegal \"index\"\n"); |
| return -1; |
| } |
| } else if (matches(*argv, "burst") == 0 || |
| strcmp(*argv, "buffer") == 0 || |
| strcmp(*argv, "maxburst") == 0) { |
| NEXT_ARG(); |
| if (buffer) { |
| fprintf(stderr, "Double \"buffer/burst\" spec\n"); |
| return -1; |
| } |
| if (get_size_and_cell(&buffer, &Rcell_log, *argv) < 0) { |
| explain1("buffer"); |
| return -1; |
| } |
| } else if (strcmp(*argv, "mtu") == 0 || |
| strcmp(*argv, "minburst") == 0) { |
| NEXT_ARG(); |
| if (mtu) { |
| fprintf(stderr, "Double \"mtu/minburst\" spec\n"); |
| return -1; |
| } |
| if (get_size_and_cell(&mtu, &Pcell_log, *argv) < 0) { |
| explain1("mtu"); |
| return -1; |
| } |
| } else if (strcmp(*argv, "mpu") == 0) { |
| NEXT_ARG(); |
| if (mpu) { |
| fprintf(stderr, "Double \"mpu\" spec\n"); |
| return -1; |
| } |
| if (get_size(&mpu, *argv)) { |
| explain1("mpu"); |
| return -1; |
| } |
| } else if (strcmp(*argv, "rate") == 0) { |
| NEXT_ARG(); |
| if (p.rate.rate) { |
| fprintf(stderr, "Double \"rate\" spec\n"); |
| return -1; |
| } |
| if (get_rate(&p.rate.rate, *argv)) { |
| explain1("rate"); |
| return -1; |
| } |
| } else if (strcmp(*argv, "avrate") == 0) { |
| NEXT_ARG(); |
| if (avrate) { |
| fprintf(stderr, "Double \"avrate\" spec\n"); |
| return -1; |
| } |
| if (get_rate(&avrate, *argv)) { |
| explain1("avrate"); |
| return -1; |
| } |
| } else if (matches(*argv, "peakrate") == 0) { |
| NEXT_ARG(); |
| if (p.peakrate.rate) { |
| fprintf(stderr, "Double \"peakrate\" spec\n"); |
| return -1; |
| } |
| if (get_rate(&p.peakrate.rate, *argv)) { |
| explain1("peakrate"); |
| return -1; |
| } |
| } else if (matches(*argv, "reclassify") == 0) { |
| p.action = TC_POLICE_RECLASSIFY; |
| } else if (matches(*argv, "drop") == 0 || |
| matches(*argv, "shot") == 0) { |
| p.action = TC_POLICE_SHOT; |
| } else if (matches(*argv, "continue") == 0) { |
| p.action = TC_POLICE_UNSPEC; |
| } else if (matches(*argv, "pass") == 0) { |
| p.action = TC_POLICE_OK; |
| } else if (matches(*argv, "pipe") == 0) { |
| p.action = TC_POLICE_PIPE; |
| } else if (strcmp(*argv, "conform-exceed") == 0) { |
| NEXT_ARG(); |
| if (get_police_result(&p.action, &presult, *argv)) { |
| fprintf(stderr, "Illegal \"action\"\n"); |
| return -1; |
| } |
| } else if (matches(*argv, "overhead") == 0) { |
| NEXT_ARG(); |
| if (get_u16(&overhead, *argv, 10)) { |
| explain1("overhead"); return -1; |
| } |
| } else if (matches(*argv, "linklayer") == 0) { |
| NEXT_ARG(); |
| if (get_linklayer(&linklayer, *argv)) { |
| explain1("linklayer"); return -1; |
| } |
| } else if (strcmp(*argv, "help") == 0) { |
| usage(); |
| } else { |
| break; |
| } |
| ok++; |
| argc--; argv++; |
| } |
| |
| if (!ok) |
| return -1; |
| |
| if (p.rate.rate && avrate) |
| return -1; |
| |
| /* Must at least do late binding, use TB or ewma policing */ |
| if (!p.rate.rate && !avrate && !p.index) { |
| fprintf(stderr, "\"rate\" or \"avrate\" MUST be specified.\n"); |
| return -1; |
| } |
| |
| /* When the TB policer is used, burst is required */ |
| if (p.rate.rate && !buffer && !avrate) { |
| fprintf(stderr, "\"burst\" requires \"rate\".\n"); |
| return -1; |
| } |
| |
| if (p.peakrate.rate) { |
| if (!p.rate.rate) { |
| fprintf(stderr, "\"peakrate\" requires \"rate\".\n"); |
| return -1; |
| } |
| if (!mtu) { |
| fprintf(stderr, "\"mtu\" is required, if \"peakrate\" is requested.\n"); |
| return -1; |
| } |
| } |
| |
| if (p.rate.rate) { |
| p.rate.mpu = mpu; |
| p.rate.overhead = overhead; |
| if (tc_calc_rtable(&p.rate, rtab, Rcell_log, mtu, |
| linklayer) < 0) { |
| fprintf(stderr, "POLICE: failed to calculate rate table.\n"); |
| return -1; |
| } |
| p.burst = tc_calc_xmittime(p.rate.rate, buffer); |
| } |
| p.mtu = mtu; |
| if (p.peakrate.rate) { |
| p.peakrate.mpu = mpu; |
| p.peakrate.overhead = overhead; |
| if (tc_calc_rtable(&p.peakrate, ptab, Pcell_log, mtu, |
| linklayer) < 0) { |
| fprintf(stderr, "POLICE: failed to calculate peak rate table.\n"); |
| return -1; |
| } |
| } |
| |
| tail = NLMSG_TAIL(n); |
| addattr_l(n, MAX_MSG, tca_id, NULL, 0); |
| addattr_l(n, MAX_MSG, TCA_POLICE_TBF, &p, sizeof(p)); |
| if (p.rate.rate) |
| addattr_l(n, MAX_MSG, TCA_POLICE_RATE, rtab, 1024); |
| if (p.peakrate.rate) |
| addattr_l(n, MAX_MSG, TCA_POLICE_PEAKRATE, ptab, 1024); |
| if (avrate) |
| addattr32(n, MAX_MSG, TCA_POLICE_AVRATE, avrate); |
| if (presult) |
| addattr32(n, MAX_MSG, TCA_POLICE_RESULT, presult); |
| |
| tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
| res = 0; |
| |
| *argc_p = argc; |
| *argv_p = argv; |
| return res; |
| } |
| |
| int parse_police(int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) |
| { |
| return act_parse_police(NULL, argc_p, argv_p, tca_id, n); |
| } |
| |
| int print_police(struct action_util *a, FILE *f, struct rtattr *arg) |
| { |
| SPRINT_BUF(b1); |
| SPRINT_BUF(b2); |
| struct tc_police *p; |
| struct rtattr *tb[TCA_POLICE_MAX+1]; |
| unsigned int buffer; |
| unsigned int linklayer; |
| |
| if (arg == NULL) |
| return 0; |
| |
| parse_rtattr_nested(tb, TCA_POLICE_MAX, arg); |
| |
| if (tb[TCA_POLICE_TBF] == NULL) { |
| fprintf(f, "[NULL police tbf]"); |
| return 0; |
| } |
| #ifndef STOOPID_8BYTE |
| if (RTA_PAYLOAD(tb[TCA_POLICE_TBF]) < sizeof(*p)) { |
| fprintf(f, "[truncated police tbf]"); |
| return -1; |
| } |
| #endif |
| p = RTA_DATA(tb[TCA_POLICE_TBF]); |
| |
| fprintf(f, " police 0x%x ", p->index); |
| fprintf(f, "rate %s ", sprint_rate(p->rate.rate, b1)); |
| buffer = tc_calc_xmitsize(p->rate.rate, p->burst); |
| fprintf(f, "burst %s ", sprint_size(buffer, b1)); |
| fprintf(f, "mtu %s ", sprint_size(p->mtu, b1)); |
| if (show_raw) |
| fprintf(f, "[%08x] ", p->burst); |
| |
| if (p->peakrate.rate) |
| fprintf(f, "peakrate %s ", sprint_rate(p->peakrate.rate, b1)); |
| |
| if (tb[TCA_POLICE_AVRATE]) |
| fprintf(f, "avrate %s ", |
| sprint_rate(rta_getattr_u32(tb[TCA_POLICE_AVRATE]), |
| b1)); |
| fprintf(f, "action %s", action_n2a(p->action)); |
| |
| if (tb[TCA_POLICE_RESULT]) { |
| __u32 action = rta_getattr_u32(tb[TCA_POLICE_RESULT]); |
| |
| fprintf(f, "/%s ", action_n2a(action)); |
| } else |
| fprintf(f, " "); |
| |
| fprintf(f, "overhead %ub ", p->rate.overhead); |
| linklayer = (p->rate.linklayer & TC_LINKLAYER_MASK); |
| if (linklayer > TC_LINKLAYER_ETHERNET || show_details) |
| fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2)); |
| fprintf(f, "\n\tref %d bind %d", p->refcnt, p->bindcnt); |
| if (show_stats) { |
| if (tb[TCA_POLICE_TM]) { |
| struct tcf_t *tm = RTA_DATA(tb[TCA_POLICE_TM]); |
| |
| print_tm(f, tm); |
| } |
| } |
| fprintf(f, "\n"); |
| |
| |
| return 0; |
| } |
| |
| int tc_print_police(FILE *f, struct rtattr *arg) |
| { |
| return print_police(&police_action_util, f, arg); |
| } |