/* $OpenBSD: if.c,v 1.80 2022/09/08 13:18:47 kn Exp $ */ /* $NetBSD: if.c,v 1.16.4.2 1996/06/07 21:46:46 thorpej Exp $ */ /* * 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. * 3. 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) #include "netstat.h" static void print_addr(struct sockaddr *, struct sockaddr **, struct if_data *); static void sidewaysintpr(u_int, int); static void catchalarm(int); static void get_rtaddrs(int, struct sockaddr *, struct sockaddr **); static void fetchifs(void); struct iftot; struct if_show_err { const char *name; const char *iname; const char *oname; uint64_t (*count)(uint64_t, uint64_t); }; static uint64_t if_show_fails(uint64_t, uint64_t); static uint64_t if_show_errors(uint64_t, uint64_t); static uint64_t if_show_qdrops(uint64_t, uint64_t); static const struct if_show_err if_show_errs[] = { [IF_SHOW_FAIL] = { "fails", "Ifail", "Ofail", if_show_fails }, [IF_SHOW_ERRS] = { "errs", "Ierrs", "Oerrs", if_show_errors }, [IF_SHOW_DROP] = { "drops", "Idrop", "Odrop", if_show_qdrops }, }; static const struct if_show_err *if_errs = if_show_errs; /* * Print a description of the network interfaces. */ void intpr(int interval, int repeatcount) { struct if_msghdr ifm; int mib[6] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0 }; char name[IFNAMSIZ + 1]; /* + 1 for the '*' */ char *buf = NULL, *next, *lim, *cp; struct rt_msghdr *rtm; struct ifa_msghdr *ifam; struct if_data *ifd; struct sockaddr *sa, *rti_info[RTAX_MAX]; struct sockaddr_dl *sdl; u_int64_t total = 0; size_t len; if_errs = &if_show_errs[dflag]; if (interval) { sidewaysintpr((unsigned)interval, repeatcount); return; } len = get_sysctl(mib, 6, &buf); printf("%-7.7s %-5.5s %-11.11s %-17.17s ", "Name", "Mtu", "Network", "Address"); if (bflag) printf("%10.10s %10.10s", "Ibytes", "Obytes"); else { printf("%8.8s %5.5s %8.8s %5.5s %5.5s", "Ipkts", if_errs->iname, "Opkts", if_errs->oname, "Colls"); } putchar('\n'); lim = buf + len; for (next = buf; next < lim; next += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)next; if (rtm->rtm_version != RTM_VERSION) continue; switch (rtm->rtm_type) { case RTM_IFINFO: total = 0; bcopy(next, &ifm, sizeof ifm); ifd = &ifm.ifm_data; sa = (struct sockaddr *)(next + rtm->rtm_hdrlen); get_rtaddrs(ifm.ifm_addrs, sa, rti_info); sdl = (struct sockaddr_dl *)rti_info[RTAX_IFP]; if (sdl == NULL || sdl->sdl_family != AF_LINK) continue; bzero(name, sizeof(name)); if (sdl->sdl_nlen >= IFNAMSIZ) memcpy(name, sdl->sdl_data, IFNAMSIZ - 1); else if (sdl->sdl_nlen > 0) memcpy(name, sdl->sdl_data, sdl->sdl_nlen); if (interface != 0 && strcmp(name, interface) != 0) continue; /* mark inactive interfaces with a '*' */ cp = strchr(name, '\0'); if ((ifm.ifm_flags & IFF_UP) == 0) *cp++ = '*'; *cp = '\0'; if (qflag) { total = ifd->ifi_ibytes + ifd->ifi_obytes + ifd->ifi_ipackets + ifd->ifi_opackets + ifd->ifi_collisions; total += if_errs->count(ifd->ifi_ierrors, ifd->ifi_iqdrops); total += if_errs->count(ifd->ifi_oerrors, ifd->ifi_oqdrops); if (total == 0) continue; } printf("%-7s %-5d ", name, ifd->ifi_mtu); print_addr(rti_info[RTAX_IFP], rti_info, ifd); break; case RTM_NEWADDR: if (qflag && total == 0) continue; if (interface != 0 && strcmp(name, interface) != 0) continue; ifam = (struct ifa_msghdr *)next; if ((ifam->ifam_addrs & (RTA_NETMASK | RTA_IFA | RTA_BRD)) == 0) break; sa = (struct sockaddr *)(next + rtm->rtm_hdrlen); get_rtaddrs(ifam->ifam_addrs, sa, rti_info); printf("%-7s %-5d ", name, ifd->ifi_mtu); print_addr(rti_info[RTAX_IFA], rti_info, ifd); break; } } free(buf); } static void print_addr(struct sockaddr *sa, struct sockaddr **rtinfo, struct if_data *ifd) { struct sockaddr_dl *sdl; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; char *cp; int m, n; switch (sa->sa_family) { case AF_UNSPEC: printf("%-11.11s ", "none"); printf("%-17.17s ", "none"); break; case AF_INET: sin = (struct sockaddr_in *)sa; cp = netname4(sin->sin_addr.s_addr, ((struct sockaddr_in *)rtinfo[RTAX_NETMASK])->sin_addr.s_addr); if (vflag) n = strlen(cp) < 11 ? 11 : strlen(cp); else n = 11; printf("%-*.*s ", n, n, cp); cp = routename4(sin->sin_addr.s_addr); if (vflag) n = strlen(cp) < 17 ? 17 : strlen(cp); else n = 17; printf("%-*.*s ", n, n, cp); break; case AF_INET6: sin6 = (struct sockaddr_in6 *)sa; #ifdef __KAME__ if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && sin6->sin6_scope_id == 0) { sin6->sin6_scope_id = ntohs(*(u_int16_t *) &sin6->sin6_addr.s6_addr[2]); sin6->sin6_addr.s6_addr[2] = 0; sin6->sin6_addr.s6_addr[3] = 0; } #endif cp = netname6(sin6, (struct sockaddr_in6 *)rtinfo[RTAX_NETMASK]); if (vflag) n = strlen(cp) < 11 ? 11 : strlen(cp); else n = 11; printf("%-*.*s ", n, n, cp); cp = routename6(sin6); if (vflag) n = strlen(cp) < 17 ? 17 : strlen(cp); else n = 17; printf("%-*.*s ", n, n, cp); break; case AF_LINK: sdl = (struct sockaddr_dl *)sa; m = printf("%-11.11s ", ""); if (sdl->sdl_type == IFT_ETHER || sdl->sdl_type == IFT_CARP || sdl->sdl_type == IFT_FDDI || sdl->sdl_type == IFT_ISO88025) printf("%-17.17s ", ether_ntoa((struct ether_addr *)LLADDR(sdl))); else { cp = (char *)LLADDR(sdl); n = sdl->sdl_alen; goto hexprint; } break; 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 += printf("%x%c", *cp++ & 0xff, n > 0 ? '.' : ' '); m = 30 - m; while (m-- > 0) putchar(' '); break; } if (bflag) { if (hflag) { char ibytes[FMT_SCALED_STRSIZE]; char obytes[FMT_SCALED_STRSIZE]; fmt_scaled(ifd->ifi_ibytes, ibytes); fmt_scaled(ifd->ifi_obytes, obytes); printf("%10s %10s", ibytes, obytes); } else printf("%10llu %10llu", ifd->ifi_ibytes, ifd->ifi_obytes); } else printf("%8llu %5llu %8llu %5llu %5llu", ifd->ifi_ipackets, if_errs->count(ifd->ifi_ierrors, ifd->ifi_iqdrops), ifd->ifi_opackets, if_errs->count(ifd->ifi_oerrors, ifd->ifi_oqdrops), ifd->ifi_collisions); putchar('\n'); } struct iftot { char ift_name[IFNAMSIZ]; /* interface name */ u_int64_t ift_ip; /* input packets */ u_int64_t ift_ib; /* input bytes */ u_int64_t ift_ie; /* input errors */ u_int64_t ift_iq; /* input qdrops */ u_int64_t ift_op; /* output packets */ u_int64_t ift_ob; /* output bytes */ u_int64_t ift_oe; /* output errors */ u_int64_t ift_oq; /* output qdrops */ u_int64_t ift_co; /* collisions */ } ip_cur, ip_old, sum_cur, sum_old; volatile sig_atomic_t signalled; /* set if alarm goes off "early" */ /* * Print a running summary of interface statistics. * Repeat display every interval seconds, showing statistics * collected over that interval. Assumes that interval is non-zero. * First line printed at top of screen is always cumulative. */ static void sidewaysintpr(unsigned int interval, int repeatcount) { sigset_t emptyset; int line; char ibytes[FMT_SCALED_STRSIZE]; char obytes[FMT_SCALED_STRSIZE]; fetchifs(); if (ip_cur.ift_name[0] == '\0') { fprintf(stderr, "%s: %s: unknown interface\n", __progname, interface); exit(1); } (void)signal(SIGALRM, catchalarm); signalled = 0; (void)alarm(interval); banner: if (bflag) printf("%7.7s in %8.8s %6.6s out %5.5s", ip_cur.ift_name, " ", ip_cur.ift_name, " "); else printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s", ip_cur.ift_name, " ", ip_cur.ift_name, " ", " "); if (bflag) printf(" %7.7s in %8.8s %6.6s out %5.5s", "total", " ", "total", " "); else printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s", "total", " ", "total", " ", " "); putchar('\n'); if (bflag) printf("%10.10s %8.8s %10.10s %5.5s", "bytes", " ", "bytes", " "); else printf("%8.8s %5.5s %8.8s %5.5s %5.5s", "packets", if_errs->name, "packets", if_errs->name, "colls"); if (bflag) printf("%10.10s %8.8s %10.10s %5.5s", "bytes", " ", "bytes", " "); else printf(" %8.8s %5.5s %8.8s %5.5s %5.5s", "packets", "errs", "packets", "errs", "colls"); putchar('\n'); fflush(stdout); line = 0; bzero(&ip_old, sizeof(ip_old)); bzero(&sum_old, sizeof(sum_old)); loop: bzero(&sum_cur, sizeof(sum_cur)); fetchifs(); if (bflag) { if (hflag) { fmt_scaled(ip_cur.ift_ib - ip_old.ift_ib, ibytes); fmt_scaled(ip_cur.ift_ob - ip_old.ift_ob, obytes); printf("%10s %8.8s %10s %5.5s", ibytes, " ", obytes, " "); } else printf("%10llu %8.8s %10llu %5.5s", ip_cur.ift_ib - ip_old.ift_ib, " ", ip_cur.ift_ob - ip_old.ift_ob, " "); } else printf("%8llu %5llu %8llu %5llu %5llu", ip_cur.ift_ip - ip_old.ift_ip, if_errs->count(ip_cur.ift_ie - ip_old.ift_ie, ip_cur.ift_iq - ip_old.ift_iq), ip_cur.ift_op - ip_old.ift_op, if_errs->count(ip_cur.ift_oe - ip_old.ift_oe, ip_cur.ift_oq - ip_old.ift_oq), ip_cur.ift_co - ip_old.ift_co); ip_old = ip_cur; if (bflag) { if (hflag) { fmt_scaled(sum_cur.ift_ib - sum_old.ift_ib, ibytes); fmt_scaled(sum_cur.ift_ob - sum_old.ift_ob, obytes); printf("%10s %8.8s %10s %5.5s", ibytes, " ", obytes, " "); } else printf("%10llu %8.8s %10llu %5.5s", sum_cur.ift_ib - sum_old.ift_ib, " ", sum_cur.ift_ob - sum_old.ift_ob, " "); } else printf("%8llu %5llu %8llu %5llu %5llu", sum_cur.ift_ip - sum_old.ift_ip, if_errs->count(sum_cur.ift_ie - sum_old.ift_ie, sum_cur.ift_iq - sum_old.ift_iq), sum_cur.ift_op - sum_old.ift_op, if_errs->count(sum_cur.ift_oe - sum_old.ift_oe, sum_cur.ift_oq - sum_old.ift_oq), sum_cur.ift_co - sum_old.ift_co); sum_old = sum_cur; putchar('\n'); fflush(stdout); if (repeatcount && --repeatcount == 0) return; line++; sigemptyset(&emptyset); if (!signalled) sigsuspend(&emptyset); signalled = 0; (void)alarm(interval); if (line == 21 && isatty(STDOUT_FILENO)) goto banner; goto loop; } /* * Called if an interval expires before sidewaysintpr has completed a loop. * Sets a flag to not wait for the alarm. */ /* ARGSUSED */ static void catchalarm(int signo) { signalled = 1; } static void get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info) { int i; for (i = 0; i < RTAX_MAX; i++) { if (addrs & (1 << i)) { rti_info[i] = sa; sa = (struct sockaddr *)((char *)(sa) + roundup(sa->sa_len, sizeof(long))); } else rti_info[i] = NULL; } } static int isegress(char *name) { static int s = -1; int len; struct ifgroupreq ifgr; struct ifg_req *ifg; int rv = 0; if (s == -1) { if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) return 0; } memset(&ifgr, 0, sizeof(ifgr)); strlcpy(ifgr.ifgr_name, name, IFNAMSIZ); if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) { return 0; } len = ifgr.ifgr_len; ifgr.ifgr_groups = calloc(len, 1); if (ifgr.ifgr_groups == NULL) err(1, "getifgroups"); if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) err(1, "SIOCGIFGROUP"); ifg = ifgr.ifgr_groups; for (; ifg && len >= sizeof(struct ifg_req); ifg++) { len -= sizeof(struct ifg_req); if (strcmp(ifg->ifgrq_group, IFG_EGRESS) == 0) rv = 1; } free(ifgr.ifgr_groups); return rv; } static void fetchifs(void) { struct if_msghdr ifm; int mib[6] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0 }; struct rt_msghdr *rtm; struct if_data *ifd; struct sockaddr *sa, *rti_info[RTAX_MAX]; struct sockaddr_dl *sdl; char *buf = NULL, *next, *lim; char name[IFNAMSIZ]; size_t len; int takeit = 0; int foundone = 0; len = get_sysctl(mib, 6, &buf); memset(&ip_cur, 0, sizeof(ip_cur)); lim = buf + len; for (next = buf; next < lim; next += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)next; if (rtm->rtm_version != RTM_VERSION) continue; switch (rtm->rtm_type) { case RTM_IFINFO: bcopy(next, &ifm, sizeof ifm); ifd = &ifm.ifm_data; sa = (struct sockaddr *)(next + rtm->rtm_hdrlen); get_rtaddrs(ifm.ifm_addrs, sa, rti_info); sdl = (struct sockaddr_dl *)rti_info[RTAX_IFP]; if (sdl == NULL || sdl->sdl_family != AF_LINK) continue; bzero(name, sizeof(name)); if (sdl->sdl_nlen >= IFNAMSIZ) memcpy(name, sdl->sdl_data, IFNAMSIZ - 1); else if (sdl->sdl_nlen > 0) memcpy(name, sdl->sdl_data, sdl->sdl_nlen); if (interface != NULL && !strcmp(name, interface)) { takeit = 1; } else if (interface == NULL && foundone == 0 && isegress(name)) { takeit = 1; foundone = 1; } else takeit = 0; if (takeit) { strlcpy(ip_cur.ift_name, name, sizeof(ip_cur.ift_name)); ip_cur.ift_ip = ifd->ifi_ipackets; ip_cur.ift_ib = ifd->ifi_ibytes; ip_cur.ift_ie = ifd->ifi_ierrors; ip_cur.ift_iq = ifd->ifi_iqdrops; ip_cur.ift_op = ifd->ifi_opackets; ip_cur.ift_ob = ifd->ifi_obytes; ip_cur.ift_oe = ifd->ifi_oerrors; ip_cur.ift_oq = ifd->ifi_oqdrops; ip_cur.ift_co = ifd->ifi_collisions; } sum_cur.ift_ip += ifd->ifi_ipackets; sum_cur.ift_ib += ifd->ifi_ibytes; sum_cur.ift_ie += ifd->ifi_ierrors; sum_cur.ift_iq += ifd->ifi_iqdrops; sum_cur.ift_op += ifd->ifi_opackets; sum_cur.ift_ob += ifd->ifi_obytes; sum_cur.ift_oe += ifd->ifi_oerrors; sum_cur.ift_oq += ifd->ifi_oqdrops; sum_cur.ift_co += ifd->ifi_collisions; break; } } if (interface == NULL && foundone == 0) { strlcpy(ip_cur.ift_name, name, sizeof(ip_cur.ift_name)); ip_cur.ift_ip = ifd->ifi_ipackets; ip_cur.ift_ib = ifd->ifi_ibytes; ip_cur.ift_ie = ifd->ifi_ierrors; ip_cur.ift_iq = ifd->ifi_iqdrops; ip_cur.ift_op = ifd->ifi_opackets; ip_cur.ift_ob = ifd->ifi_obytes; ip_cur.ift_oe = ifd->ifi_oerrors; ip_cur.ift_oq = ifd->ifi_oqdrops; ip_cur.ift_co = ifd->ifi_collisions; } free(buf); } static uint64_t if_show_fails(uint64_t errors, uint64_t qdrops) { return (errors + qdrops); } static uint64_t if_show_errors(uint64_t errors, uint64_t qdrops) { return (errors); } static uint64_t if_show_qdrops(uint64_t errors, uint64_t qdrops) { return (qdrops); }