/usr.bin/netstat/if.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 732 lines · 612 code · 53 blank · 67 comment · 120 complexity · 9dc739b52f4c3755da6e336482aba881 MD5 · raw file
- /*-
- * Copyright (c) 1983, 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #if 0
- #ifndef lint
- static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
- #endif /* not lint */
- #endif
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include <sys/types.h>
- #include <sys/protosw.h>
- #include <sys/socket.h>
- #include <sys/socketvar.h>
- #include <sys/sysctl.h>
- #include <sys/time.h>
- #include <net/if.h>
- #include <net/if_var.h>
- #include <net/if_dl.h>
- #include <net/if_types.h>
- #include <net/ethernet.h>
- #include <net/pfvar.h>
- #include <net/if_pfsync.h>
- #include <netinet/in.h>
- #include <netinet/in_var.h>
- #include <netipx/ipx.h>
- #include <netipx/ipx_if.h>
- #include <arpa/inet.h>
- #include <err.h>
- #include <errno.h>
- #include <libutil.h>
- #ifdef INET6
- #include <netdb.h>
- #endif
- #include <signal.h>
- #include <stdint.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include "netstat.h"
- #define YES 1
- #define NO 0
- static void sidewaysintpr(int, u_long);
- static void catchalarm(int);
- #ifdef INET6
- static char addr_buf[NI_MAXHOST]; /* for getnameinfo() */
- #endif
- static const char* pfsyncacts[] = {
- /* PFSYNC_ACT_CLR */ "clear all request",
- /* PFSYNC_ACT_INS */ "state insert",
- /* PFSYNC_ACT_INS_ACK */ "state inserted ack",
- /* PFSYNC_ACT_UPD */ "state update",
- /* PFSYNC_ACT_UPD_C */ "compressed state update",
- /* PFSYNC_ACT_UPD_REQ */ "uncompressed state request",
- /* PFSYNC_ACT_DEL */ "state delete",
- /* PFSYNC_ACT_DEL_C */ "compressed state delete",
- /* PFSYNC_ACT_INS_F */ "fragment insert",
- /* PFSYNC_ACT_DEL_F */ "fragment delete",
- /* PFSYNC_ACT_BUS */ "bulk update mark",
- /* PFSYNC_ACT_TDB */ "TDB replay counter update",
- /* PFSYNC_ACT_EOF */ "end of frame mark",
- };
- static void
- pfsync_acts_stats(const char *fmt, uint64_t *a)
- {
- int i;
- for (i = 0; i < PFSYNC_ACT_MAX; i++, a++)
- if (*a || sflag <= 1)
- printf(fmt, *a, pfsyncacts[i], plural(*a));
- }
- /*
- * Dump pfsync statistics structure.
- */
- void
- pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
- {
- struct pfsyncstats pfsyncstat, zerostat;
- size_t len = sizeof(struct pfsyncstats);
- if (live) {
- if (zflag)
- memset(&zerostat, 0, len);
- if (sysctlbyname("net.pfsync.stats", &pfsyncstat, &len,
- zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
- if (errno != ENOENT)
- warn("sysctl: net.pfsync.stats");
- return;
- }
- } else
- kread(off, &pfsyncstat, len);
- printf("%s:\n", name);
- #define p(f, m) if (pfsyncstat.f || sflag <= 1) \
- printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
- p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n");
- p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n");
- pfsync_acts_stats("\t %ju %s%s received\n",
- &pfsyncstat.pfsyncs_iacts[0]);
- p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n");
- p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n");
- p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n");
- p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n");
- p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n");
- p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n");
- p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n");
- p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n");
- p(pfsyncs_stale, "\t\t%ju stale state%s\n");
- p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n");
- p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n");
- p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n");
- pfsync_acts_stats("\t %ju %s%s sent\n",
- &pfsyncstat.pfsyncs_oacts[0]);
- p(pfsyncs_onomem, "\t\t%ju failure%s due to mbuf memory error\n");
- p(pfsyncs_oerrors, "\t\t%ju send error%s\n");
- #undef p
- }
- /*
- * Display a formatted value, or a '-' in the same space.
- */
- static void
- show_stat(const char *fmt, int width, u_long value, short showvalue)
- {
- const char *lsep, *rsep;
- char newfmt[32];
- lsep = "";
- if (strncmp(fmt, "LS", 2) == 0) {
- lsep = " ";
- fmt += 2;
- }
- rsep = " ";
- if (strncmp(fmt, "NRS", 3) == 0) {
- rsep = "";
- fmt += 3;
- }
- if (showvalue == 0) {
- /* Print just dash. */
- sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
- printf(newfmt, "-");
- return;
- }
- if (hflag) {
- char buf[5];
- /* Format in human readable form. */
- humanize_number(buf, sizeof(buf), (int64_t)value, "",
- HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL);
- sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
- printf(newfmt, buf);
- } else {
- /* Construct the format string. */
- sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep);
- printf(newfmt, value);
- }
- }
- /*
- * Print a description of the network interfaces.
- */
- void
- intpr(int interval1, u_long ifnetaddr, void (*pfunc)(char *))
- {
- struct ifnet ifnet;
- struct ifnethead ifnethead;
- union {
- struct ifaddr ifa;
- struct in_ifaddr in;
- #ifdef INET6
- struct in6_ifaddr in6;
- #endif
- struct ipx_ifaddr ipx;
- } ifaddr;
- u_long ifaddraddr;
- u_long ifaddrfound;
- u_long opackets;
- u_long ipackets;
- u_long obytes;
- u_long ibytes;
- u_long omcasts;
- u_long imcasts;
- u_long oerrors;
- u_long ierrors;
- u_long idrops;
- u_long collisions;
- int drops;
- struct sockaddr *sa = NULL;
- char name[IFNAMSIZ];
- short network_layer;
- short link_layer;
- if (ifnetaddr == 0) {
- printf("ifnet: symbol not defined\n");
- return;
- }
- if (interval1) {
- sidewaysintpr(interval1, ifnetaddr);
- return;
- }
- if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead) != 0)
- return;
- ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
- if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
- return;
- if (!pfunc) {
- if (Wflag)
- printf("%-7.7s", "Name");
- else
- printf("%-5.5s", "Name");
- printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s",
- "Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop");
- if (bflag)
- printf(" %10.10s","Ibytes");
- printf(" %8.8s %5.5s", "Opkts", "Oerrs");
- if (bflag)
- printf(" %10.10s","Obytes");
- printf(" %5s", "Coll");
- if (dflag)
- printf(" %s", "Drop");
- putchar('\n');
- }
- ifaddraddr = 0;
- while (ifnetaddr || ifaddraddr) {
- struct sockaddr_in *sockin;
- #ifdef INET6
- struct sockaddr_in6 *sockin6;
- #endif
- char *cp;
- int n, m;
- network_layer = 0;
- link_layer = 0;
- if (ifaddraddr == 0) {
- if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
- return;
- strlcpy(name, ifnet.if_xname, sizeof(name));
- ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
- if (interface != 0 && strcmp(name, interface) != 0)
- continue;
- cp = strchr(name, '\0');
- if (pfunc) {
- (*pfunc)(name);
- continue;
- }
- if ((ifnet.if_flags&IFF_UP) == 0)
- *cp++ = '*';
- *cp = '\0';
- ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead);
- }
- ifaddrfound = ifaddraddr;
- /*
- * Get the interface stats. These may get
- * overriden below on a per-interface basis.
- */
- opackets = ifnet.if_opackets;
- ipackets = ifnet.if_ipackets;
- obytes = ifnet.if_obytes;
- ibytes = ifnet.if_ibytes;
- omcasts = ifnet.if_omcasts;
- imcasts = ifnet.if_imcasts;
- oerrors = ifnet.if_oerrors;
- ierrors = ifnet.if_ierrors;
- idrops = ifnet.if_iqdrops;
- collisions = ifnet.if_collisions;
- drops = ifnet.if_snd.ifq_drops;
- if (ifaddraddr == 0) {
- if (Wflag)
- printf("%-7.7s", name);
- else
- printf("%-5.5s", name);
- printf(" %5lu ", ifnet.if_mtu);
- printf("%-13.13s ", "none");
- printf("%-17.17s ", "none");
- } else {
- if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)
- != 0) {
- ifaddraddr = 0;
- continue;
- }
- #define CP(x) ((char *)(x))
- cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
- CP(&ifaddr);
- sa = (struct sockaddr *)cp;
- if (af != AF_UNSPEC && sa->sa_family != af) {
- ifaddraddr =
- (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
- continue;
- }
- if (Wflag)
- printf("%-7.7s", name);
- else
- printf("%-5.5s", name);
- printf(" %5lu ", ifnet.if_mtu);
- switch (sa->sa_family) {
- case AF_UNSPEC:
- printf("%-13.13s ", "none");
- printf("%-15.15s ", "none");
- break;
- case AF_INET:
- sockin = (struct sockaddr_in *)sa;
- #ifdef notdef
- /* can't use inet_makeaddr because kernel
- * keeps nets unshifted.
- */
- in = inet_makeaddr(ifaddr.in.ia_subnet,
- INADDR_ANY);
- printf("%-13.13s ", netname(in.s_addr,
- ifaddr.in.ia_subnetmask));
- #else
- printf("%-13.13s ",
- netname(htonl(ifaddr.in.ia_subnet),
- ifaddr.in.ia_subnetmask));
- #endif
- printf("%-17.17s ",
- routename(sockin->sin_addr.s_addr));
- network_layer = 1;
- break;
- #ifdef INET6
- case AF_INET6:
- sockin6 = (struct sockaddr_in6 *)sa;
- in6_fillscopeid(&ifaddr.in6.ia_addr);
- printf("%-13.13s ",
- netname6(&ifaddr.in6.ia_addr,
- &ifaddr.in6.ia_prefixmask.sin6_addr));
- in6_fillscopeid(sockin6);
- getnameinfo(sa, sa->sa_len, addr_buf,
- sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
- printf("%-17.17s ", addr_buf);
- network_layer = 1;
- break;
- #endif /*INET6*/
- case AF_IPX:
- {
- struct sockaddr_ipx *sipx =
- (struct sockaddr_ipx *)sa;
- u_long net;
- char netnum[10];
- *(union ipx_net *) &net = sipx->sipx_addr.x_net;
- sprintf(netnum, "%lx", (u_long)ntohl(net));
- printf("ipx:%-8s ", netnum);
- /* printf("ipx:%-8s ", netname(net, 0L)); */
- printf("%-17s ",
- ipx_phost((struct sockaddr *)sipx));
- }
- network_layer = 1;
- break;
- case AF_APPLETALK:
- printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
- printf("%-11.11s ",atalk_print(sa,0x0b) );
- break;
- case AF_LINK:
- {
- struct sockaddr_dl *sdl =
- (struct sockaddr_dl *)sa;
- char linknum[10];
- cp = (char *)LLADDR(sdl);
- n = sdl->sdl_alen;
- sprintf(linknum, "<Link#%d>", sdl->sdl_index);
- m = printf("%-13.13s ", linknum);
- }
- goto hexprint;
- default:
- m = printf("(%d)", sa->sa_family);
- for (cp = sa->sa_len + (char *)sa;
- --cp > sa->sa_data && (*cp == 0);) {}
- n = cp - sa->sa_data + 1;
- cp = sa->sa_data;
- hexprint:
- while ((--n >= 0) && (m < 30))
- m += printf("%02x%c", *cp++ & 0xff,
- n > 0 ? ':' : ' ');
- m = 32 - m;
- while (m-- > 0)
- putchar(' ');
- link_layer = 1;
- break;
- }
- /*
- * Fixup the statistics for interfaces that
- * update stats for their network addresses
- */
- if (network_layer) {
- opackets = ifaddr.in.ia_ifa.if_opackets;
- ipackets = ifaddr.in.ia_ifa.if_ipackets;
- obytes = ifaddr.in.ia_ifa.if_obytes;
- ibytes = ifaddr.in.ia_ifa.if_ibytes;
- }
- ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
- }
- show_stat("lu", 8, ipackets, link_layer|network_layer);
- show_stat("lu", 5, ierrors, link_layer);
- show_stat("lu", 5, idrops, link_layer);
- if (bflag)
- show_stat("lu", 10, ibytes, link_layer|network_layer);
- show_stat("lu", 8, opackets, link_layer|network_layer);
- show_stat("lu", 5, oerrors, link_layer);
- if (bflag)
- show_stat("lu", 10, obytes, link_layer|network_layer);
- show_stat("NRSlu", 5, collisions, link_layer);
- if (dflag)
- show_stat("LSd", 4, drops, link_layer);
- putchar('\n');
- if (aflag && ifaddrfound) {
- /*
- * Print family's multicast addresses
- */
- struct ifmultiaddr *multiaddr;
- struct ifmultiaddr ifma;
- union {
- struct sockaddr sa;
- struct sockaddr_in in;
- #ifdef INET6
- struct sockaddr_in6 in6;
- #endif /* INET6 */
- struct sockaddr_dl dl;
- } msa;
- const char *fmt;
- TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
- if (kread((u_long)multiaddr, (char *)&ifma,
- sizeof ifma) != 0)
- break;
- multiaddr = &ifma;
- if (kread((u_long)ifma.ifma_addr, (char *)&msa,
- sizeof msa) != 0)
- break;
- if (msa.sa.sa_family != sa->sa_family)
- continue;
- fmt = 0;
- switch (msa.sa.sa_family) {
- case AF_INET:
- fmt = routename(msa.in.sin_addr.s_addr);
- break;
- #ifdef INET6
- case AF_INET6:
- in6_fillscopeid(&msa.in6);
- getnameinfo(&msa.sa, msa.sa.sa_len,
- addr_buf, sizeof(addr_buf), 0, 0,
- NI_NUMERICHOST);
- printf("%*s %-19.19s(refs: %d)\n",
- Wflag ? 27 : 25, "",
- addr_buf, ifma.ifma_refcount);
- break;
- #endif /* INET6 */
- case AF_LINK:
- switch (msa.dl.sdl_type) {
- case IFT_ETHER:
- case IFT_FDDI:
- fmt = ether_ntoa(
- (struct ether_addr *)
- LLADDR(&msa.dl));
- break;
- }
- break;
- }
- if (fmt) {
- printf("%*s %-17.17s",
- Wflag ? 27 : 25, "", fmt);
- if (msa.sa.sa_family == AF_LINK) {
- printf(" %8lu", imcasts);
- printf("%*s",
- bflag ? 17 : 6, "");
- printf(" %8lu", omcasts);
- }
- putchar('\n');
- }
- }
- }
- }
- }
- struct iftot {
- SLIST_ENTRY(iftot) chain;
- char ift_name[IFNAMSIZ]; /* interface name */
- u_long ift_ip; /* input packets */
- u_long ift_ie; /* input errors */
- u_long ift_id; /* input drops */
- u_long ift_op; /* output packets */
- u_long ift_oe; /* output errors */
- u_long ift_co; /* collisions */
- u_int ift_dr; /* drops */
- u_long ift_ib; /* input bytes */
- u_long ift_ob; /* output bytes */
- };
- u_char signalled; /* set if alarm goes off "early" */
- /*
- * Print a running summary of interface statistics.
- * Repeat display every interval1 seconds, showing statistics
- * collected over that interval. Assumes that interval1 is non-zero.
- * First line printed at top of screen is always cumulative.
- * XXX - should be rewritten to use ifmib(4).
- */
- static void
- sidewaysintpr(int interval1, u_long off)
- {
- struct ifnet ifnet;
- u_long firstifnet;
- struct ifnethead ifnethead;
- struct itimerval interval_it;
- struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
- int line;
- int oldmask, first;
- u_long interesting_off;
- if (kread(off, (char *)&ifnethead, sizeof ifnethead) != 0)
- return;
- firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
- if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
- printf("malloc failed\n");
- exit(1);
- }
- memset(iftot, 0, sizeof(struct iftot));
- interesting = NULL;
- interesting_off = 0;
- for (off = firstifnet, ip = iftot; off;) {
- char name[IFNAMSIZ];
- if (kread(off, (char *)&ifnet, sizeof ifnet) != 0)
- break;
- strlcpy(name, ifnet.if_xname, sizeof(name));
- if (interface && strcmp(name, interface) == 0) {
- interesting = ip;
- interesting_off = off;
- }
- snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);
- if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
- printf("malloc failed\n");
- exit(1);
- }
- memset(ipn, 0, sizeof(struct iftot));
- SLIST_NEXT(ip, chain) = ipn;
- ip = ipn;
- off = (u_long)TAILQ_NEXT(&ifnet, if_link);
- }
- if (interface && interesting == NULL)
- errx(1, "%s: unknown interface", interface);
- if ((total = malloc(sizeof(struct iftot))) == NULL) {
- printf("malloc failed\n");
- exit(1);
- }
- memset(total, 0, sizeof(struct iftot));
- if ((sum = malloc(sizeof(struct iftot))) == NULL) {
- printf("malloc failed\n");
- exit(1);
- }
- memset(sum, 0, sizeof(struct iftot));
- (void)signal(SIGALRM, catchalarm);
- signalled = NO;
- interval_it.it_interval.tv_sec = interval1;
- interval_it.it_interval.tv_usec = 0;
- interval_it.it_value = interval_it.it_interval;
- setitimer(ITIMER_REAL, &interval_it, NULL);
- first = 1;
- banner:
- printf("%17s %14s %16s", "input",
- interesting ? interesting->ift_name : "(Total)", "output");
- putchar('\n');
- printf("%10s %5s %5s %10s %10s %5s %10s %5s",
- "packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
- "colls");
- if (dflag)
- printf(" %5.5s", "drops");
- putchar('\n');
- fflush(stdout);
- line = 0;
- loop:
- if (interesting != NULL) {
- ip = interesting;
- if (kread(interesting_off, (char *)&ifnet, sizeof ifnet) != 0) {
- printf("???\n");
- exit(1);
- };
- if (!first) {
- show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1);
- show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1);
- show_stat("lu", 5, ifnet.if_iqdrops - ip->ift_id, 1);
- show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1);
- show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1);
- show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1);
- show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1);
- show_stat("NRSlu", 5,
- ifnet.if_collisions - ip->ift_co, 1);
- if (dflag)
- show_stat("LSu", 5,
- ifnet.if_snd.ifq_drops - ip->ift_dr, 1);
- }
- ip->ift_ip = ifnet.if_ipackets;
- ip->ift_ie = ifnet.if_ierrors;
- ip->ift_id = ifnet.if_iqdrops;
- ip->ift_ib = ifnet.if_ibytes;
- ip->ift_op = ifnet.if_opackets;
- ip->ift_oe = ifnet.if_oerrors;
- ip->ift_ob = ifnet.if_obytes;
- ip->ift_co = ifnet.if_collisions;
- ip->ift_dr = ifnet.if_snd.ifq_drops;
- } else {
- sum->ift_ip = 0;
- sum->ift_ie = 0;
- sum->ift_id = 0;
- sum->ift_ib = 0;
- sum->ift_op = 0;
- sum->ift_oe = 0;
- sum->ift_ob = 0;
- sum->ift_co = 0;
- sum->ift_dr = 0;
- for (off = firstifnet, ip = iftot;
- off && SLIST_NEXT(ip, chain) != NULL;
- ip = SLIST_NEXT(ip, chain)) {
- if (kread(off, (char *)&ifnet, sizeof ifnet) != 0) {
- off = 0;
- continue;
- }
- sum->ift_ip += ifnet.if_ipackets;
- sum->ift_ie += ifnet.if_ierrors;
- sum->ift_id += ifnet.if_iqdrops;
- sum->ift_ib += ifnet.if_ibytes;
- sum->ift_op += ifnet.if_opackets;
- sum->ift_oe += ifnet.if_oerrors;
- sum->ift_ob += ifnet.if_obytes;
- sum->ift_co += ifnet.if_collisions;
- sum->ift_dr += ifnet.if_snd.ifq_drops;
- off = (u_long)TAILQ_NEXT(&ifnet, if_link);
- }
- if (!first) {
- show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1);
- show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1);
- show_stat("lu", 5, sum->ift_id - total->ift_id, 1);
- show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1);
- show_stat("lu", 10, sum->ift_op - total->ift_op, 1);
- show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1);
- show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1);
- show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1);
- if (dflag)
- show_stat("LSu", 5,
- sum->ift_dr - total->ift_dr, 1);
- }
- *total = *sum;
- }
- if (!first)
- putchar('\n');
- fflush(stdout);
- if ((noutputs != 0) && (--noutputs == 0))
- exit(0);
- oldmask = sigblock(sigmask(SIGALRM));
- while (!signalled)
- sigpause(0);
- signalled = NO;
- sigsetmask(oldmask);
- line++;
- first = 0;
- if (line == 21)
- goto banner;
- else
- goto loop;
- /*NOTREACHED*/
- }
- /*
- * Set a flag to indicate that a signal from the periodic itimer has been
- * caught.
- */
- static void
- catchalarm(int signo __unused)
- {
- signalled = YES;
- }