sbin/ipfw/altq.c

   1 /*
   2  * Copyright (c) 2002-2003 Luigi Rizzo
   3  * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp
   4  * Copyright (c) 1994 Ugen J.S.Antsilevich
   5  *
   6  * Idea and grammar partially left from:
   7  * Copyright (c) 1993 Daniel Boulet
   8  *
   9  * Redistribution and use in source forms, with and without modification,
  10  * are permitted provided that this entire comment appears intact.
  11  *
  12  * Redistribution in binary form may occur without any restrictions.
  13  * Obviously, it would be nice if you gave credit where credit is due
  14  * but requiring it would be too onerous.
  15  *
  16  * This software is provided ``AS IS'' without any warranties of any kind.
  17  *
  18  * NEW command line interface for IP firewall facility
  19  *
  20  * $FreeBSD$
  21  *
  22  * altq interface
  23  */
  24
  25 #include <sys/types.h>
  26 #include <sys/socket.h>
  27 #include <sys/sockio.h>
  28
  29 #include "ipfw2.h"
  30
  31 #include <err.h>
  32 #include <errno.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <sysexits.h>
  37 #include <unistd.h>
  38 #include <fcntl.h>
  39
  40 #include <net/if.h>             /* IFNAMSIZ */
  41 #include <net/pfvar.h>
  42 #include <netinet/ip_fw.h>
  43
  44 /*
  45  * Map between current altq queue id numbers and names.
  46  */
  47 static TAILQ_HEAD(, pf_altq) altq_entries =
  48         TAILQ_HEAD_INITIALIZER(altq_entries);
  49
  50 void
  51 altq_set_enabled(int enabled)
  52 {
  53         int pffd;
  54
  55         pffd = open("/dev/pf", O_RDWR);
  56         if (pffd == -1)
  57                 err(EX_UNAVAILABLE,
  58                     "altq support opening pf(4) control device");
  59         if (enabled) {
  60                 if (ioctl(pffd, DIOCSTARTALTQ) != 0 && errno != EEXIST)
  61                         err(EX_UNAVAILABLE, "enabling altq");
  62         } else {
  63                 if (ioctl(pffd, DIOCSTOPALTQ) != 0 && errno != ENOENT)
  64                         err(EX_UNAVAILABLE, "disabling altq");
  65         }
  66         close(pffd);
  67 }
  68
  69 static void
  70 altq_fetch(void)
  71 {
  72         struct pfioc_altq pfioc;
  73         struct pf_altq *altq;
  74         int pffd;
  75         unsigned int mnr;
  76         static int altq_fetched = 0;
  77
  78         if (altq_fetched)
  79                 return;
  80         altq_fetched = 1;
  81         pffd = open("/dev/pf", O_RDONLY);
  82         if (pffd == -1) {
  83                 warn("altq support opening pf(4) control device");
  84                 return;
  85         }
  86         bzero(&pfioc, sizeof(pfioc));
  87         if (ioctl(pffd, DIOCGETALTQS, &pfioc) != 0) {
  88                 warn("altq support getting queue list");
  89                 close(pffd);
  90                 return;
  91         }
  92         mnr = pfioc.nr;
  93         for (pfioc.nr = 0; pfioc.nr < mnr; pfioc.nr++) {
  94                 if (ioctl(pffd, DIOCGETALTQ, &pfioc) != 0) {
  95                         if (errno == EBUSY)
  96                                 break;
  97                         warn("altq support getting queue list");
  98                         close(pffd);
  99                         return;
 100                 }
 101                 if (pfioc.altq.qid == 0)
 102                         continue;
 103                 altq = safe_calloc(1, sizeof(*altq));
 104                 *altq = pfioc.altq;
 105                 TAILQ_INSERT_TAIL(&altq_entries, altq, entries);
 106         }
 107         close(pffd);
 108 }
 109
 110 u_int32_t
 111 altq_name_to_qid(const char *name)
 112 {
 113         struct pf_altq *altq;
 114
 115         altq_fetch();
 116         TAILQ_FOREACH(altq, &altq_entries, entries)
 117                 if (strcmp(name, altq->qname) == 0)
 118                         break;
 119         if (altq == NULL)
 120                 errx(EX_DATAERR, "altq has no queue named `%s'", name);
 121         return altq->qid;
 122 }
 123
 124 const char *
 125 altq_qid_to_name(u_int32_t qid)
 126 {
 127         struct pf_altq *altq;
 128
 129         altq_fetch();
 130         TAILQ_FOREACH(altq, &altq_entries, entries)
 131                 if (qid == altq->qid)
 132                         break;
 133         if (altq == NULL)
 134                 return NULL;
 135         return altq->qname;
 136 }
 137
 138 void
 139 print_altq_cmd(ipfw_insn_altq *altqptr)
 140 {
 141         if (altqptr) {
 142                 const char *qname;
 143
 144                 qname = altq_qid_to_name(altqptr->qid);
 145                 if (qname == NULL)
 146                         printf(" altq ?<%u>", altqptr->qid);
 147                 else
 148                         printf(" altq %s", qname);
 149         }
 150 }