From nobody Wed Jul 26 15:58:47 2023 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4R9z8l4H4cz4pFBh; Wed, 26 Jul 2023 15:58:47 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4R9z8l3WL3z4G9H; Wed, 26 Jul 2023 15:58:47 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1690387127; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=veXf+utroKjs6Dc5AGmvWUTK57xCLBJUNW8ac8QSb2I=; b=coGdmCZR9SRjrKrRh8uvptoYsvMsfVoILQ5jzJUwXJybEpSm+Aeh9IPA2W50m9dozsi0/l 3yh9EPM6pgCYgvWhUALj94dvJsz7PIZnWUw4hnCywLs/PiEprnsyHuZsMTpvgXWfEKACTa uVJukJcU/AwL0iGj22asiCcFGlAdUMTGDaE4ZozRIeJtDw0nK5eo9/yMnXVZXrdR+FArZ+ cyGfBOE44O01neNq1ga/fownV5esRTADIe/lxdYCAubrAOPIJPgoYqc3OJMIeMn8C3LUW2 Ss37Vse7LJPJw+N7Ezs8t/kvMyMCZUu6znrwGj2Gmg9Qbiows9Zq0gB1e/5i0Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1690387127; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=veXf+utroKjs6Dc5AGmvWUTK57xCLBJUNW8ac8QSb2I=; b=uas8B/50I/ZzMEfSrQax8Hn8rLjq2Slm7glQOnQt3Q2eV330+fEWTmNzqO03PAsSyzjRYJ fxTjxBJGxMSCV8wCXkRW3VS3OnEcps/Ttjsr8EoX5/tEng2kxvwdo7EUXDgea4KXOySrAE m6Q1/L+MlgRvCiikikEGo+7jMbiTzZvoTsX30Tvk6sT1rdzPTP15LUnMihDUnqh5/sUFXb xpHzDSBfVZmU+6Ini+LvcYeDtsuXag3EWRS0FDpxy5L3pVBqtkwm9TYtUSzcBqi8u7C5f3 LcqAxk0iYLp8uCYGVIoO90iUZULwSw98d5VuZxRecXUJDhVID+j+hz7bFFv5dQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1690387127; a=rsa-sha256; cv=none; b=orxvsl3Hj8uxpYXX+/q8QEJN5MacDxCW52yMAEy34ECCrNTCJHxGReKc+u+Ro+DSk5RcIM MNuIEUmklUqzPg/X6KAZPkvexPJD77fqBZgKafadLU9wmnjcKzV6S7Jj+zOjcC+y3NHCoC aiV64wIEpGz9kXR92x11exVH7m31O7shu/FPBMPUdRFCEVP55CQjAqxVfrTOFiMI+lDEvT XWJN4b/RuAQmTDf9YT5Ptz5btixrIqGtCzP1pyXfwqpi3N+Hh1lzSeH6FjWt6HP5D4SaJ2 jc9OhJBC/FIZ1bzyIr4w7KXrilDc9avAv8noWIuc4acLYg9aEwsNotV7zlgtcQ== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4R9z8l2VPGzpBV; Wed, 26 Jul 2023 15:58:47 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.17.1/8.17.1) with ESMTP id 36QFwlkp070925; Wed, 26 Jul 2023 15:58:47 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.17.1/8.17.1/Submit) id 36QFwl4K070924; Wed, 26 Jul 2023 15:58:47 GMT (envelope-from git) Date: Wed, 26 Jul 2023 15:58:47 GMT Message-Id: <202307261558.36QFwl4K070924@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mike Karels Subject: git: 372e3d561d82 - main - netstat -i: compute most field widths dynamically List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-all@freebsd.org X-BeenThere: dev-commits-src-all@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: karels X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 372e3d561d82aba7a66fcd4ecb49a4d0a9f69345 Auto-Submitted: auto-generated The branch main has been updated by karels: URL: https://cgit.FreeBSD.org/src/commit/?id=372e3d561d82aba7a66fcd4ecb49a4d0a9f69345 commit 372e3d561d82aba7a66fcd4ecb49a4d0a9f69345 Author: Mike Karels AuthorDate: 2023-07-26 15:56:52 +0000 Commit: Mike Karels CommitDate: 2023-07-26 15:56:52 +0000 netstat -i: compute most field widths dynamically The network and address fields were sometimes truncated for netstat -i without -W, and often much too wide for netstat -i with the -W option. Fields such as normal packet counts often overflowed. As a result, columns didn't line up, and large white spaces made it harder to follow a line across the display. Change the code to compute the required field sizes for network, address, and various packet counts. Hoist the code to format network and address into a subroutine that can be called twice, once to measure the required field widths, and once to emit the values. Use separate field widths for input and output packets, byte counts, and error and drop counters. These are left at defaults (the preceding values) with the -h option, in which case the fields have a limited total width. An extra space is included between the Network and Address, which otherwise seemed too close. Change the mention of -W with -i in the man page to say that most field widths are computed dynamically in this case. MFC after: 1 week Reviewed by: sjg, glebius Differential Revision: https://reviews.freebsd.org/D41160 --- usr.bin/netstat/if.c | 217 ++++++++++++++++++++++++++++++---------------- usr.bin/netstat/netstat.1 | 3 + 2 files changed, 143 insertions(+), 77 deletions(-) diff --git a/usr.bin/netstat/if.c b/usr.bin/netstat/if.c index fec5a4c4845b..8fe9e3a3c924 100644 --- a/usr.bin/netstat/if.c +++ b/usr.bin/netstat/if.c @@ -269,6 +269,99 @@ next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family) return (ifma); } +enum process_op { MEASURE, EMIT }; + +static void +process_ifa_addr(enum process_op op, struct ifaddrs *ifa, int *max_net_len, + int *max_addr_len, bool *network, bool *link) +{ + int net_len, addr_len; + const char *nn, *rn; + + if (op == EMIT) { + net_len = *max_net_len; + addr_len = *max_addr_len; + } + + switch (ifa->ifa_addr->sa_family) { + case AF_UNSPEC: + if (op == MEASURE) { + net_len = strlen("none"); + addr_len = strlen("none"); + } else { + xo_emit("{:network/%-*.*s} ", net_len, net_len, + "none"); + xo_emit("{:address/%-*.*s} ", addr_len, addr_len, + "none"); + } + break; + case AF_INET: +#ifdef INET6 + case AF_INET6: +#endif /* INET6 */ + nn = netname(ifa->ifa_addr, ifa->ifa_netmask); + rn = routename(ifa->ifa_addr, numeric_addr); + if (op == MEASURE) { + net_len = strlen(nn); + addr_len = strlen(rn); + } else { + xo_emit("{t:network/%-*s} ", net_len, nn); + xo_emit("{t:address/%-*s} ", addr_len, rn); + } + + if (network != NULL) + *network = true; + break; + case AF_LINK: + { + struct sockaddr_dl *sdl; + char linknum[sizeof("")]; + + sdl = (struct sockaddr_dl *)ifa->ifa_addr; + snprintf(linknum, sizeof(linknum), "", sdl->sdl_index); + if (op == MEASURE) { + net_len = strlen(linknum); + if (sdl->sdl_nlen == 0 && + sdl->sdl_alen == 0 && + sdl->sdl_slen == 0) + addr_len = 1; + else + addr_len = strlen(routename(ifa->ifa_addr, 1)); + } else { + xo_emit("{t:network/%-*.*s} ", net_len, net_len, + linknum); + if (sdl->sdl_nlen == 0 && + sdl->sdl_alen == 0 && + sdl->sdl_slen == 0) + xo_emit("{P:/%*s} ", addr_len, ""); + else + xo_emit("{t:address/%-*.*s} ", addr_len, + addr_len, routename(ifa->ifa_addr, 1)); + } + if (link != NULL) + *link = true; + break; + } + } + + if (op == MEASURE) { + if (net_len > *max_net_len) + *max_net_len = net_len; + if (addr_len > *max_addr_len) + *max_addr_len = addr_len; + } +} + +static int +max_num_len(int max_len, u_long num) +{ + int len = 2; /* include space */ + + for (; num > 10; len++) + num /= 10; + return (MAX(max_len, len)); +} + /* * Print a description of the network interfaces. */ @@ -278,7 +371,8 @@ intpr(void (*pfunc)(char *), int af) struct ifaddrs *ifap, *ifa; struct ifmaddrs *ifmap, *ifma; u_int ifn_len_max = 5, ifn_len; - u_int has_ipv6 = 0, net_len = 13, addr_len = 17; + u_int net_len = strlen("Network "), addr_len = strlen("Address "); + u_int npkt_len = 8, nbyte_len = 10, nerr_len = 5; if (interval) return sidewaysintpr(); @@ -298,39 +392,51 @@ intpr(void (*pfunc)(char *), int af) if ((ifa->ifa_flags & IFF_UP) == 0) ++ifn_len; ifn_len_max = MAX(ifn_len_max, ifn_len); - if (ifa->ifa_addr->sa_family == AF_INET6) - has_ipv6 = 1; - } - if (Wflag) { - if (has_ipv6) { - net_len = 24; - addr_len = 39; - } else - net_len = 18; + process_ifa_addr(MEASURE, ifa, &net_len, &addr_len, + NULL, NULL); + +#define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s) + if (!hflag) { + npkt_len = max_num_len(npkt_len, IFA_STAT(ipackets)); + npkt_len = max_num_len(npkt_len, IFA_STAT(opackets)); + nerr_len = max_num_len(nerr_len, IFA_STAT(ierrors)); + nerr_len = max_num_len(nerr_len, IFA_STAT(iqdrops)); + nerr_len = max_num_len(nerr_len, IFA_STAT(collisions)); + if (dflag) + nerr_len = max_num_len(nerr_len, + IFA_STAT(oqdrops)); + if (bflag) { + nbyte_len = max_num_len(nbyte_len, + IFA_STAT(ibytes)); + nbyte_len = max_num_len(nbyte_len, + IFA_STAT(obytes)); + } + } } xo_open_list("interface"); if (!pfunc) { xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name"); - xo_emit(" {T:/%5.5s} {T:/%-*.*s} {T:/%-*.*s} {T:/%8.8s} " - "{T:/%5.5s} {T:/%5.5s}", + xo_emit(" {T:/%5.5s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} " + "{T:/%*.*s} {T:/%*.*s}", "Mtu", net_len, net_len, "Network", addr_len, addr_len, - "Address", "Ipkts", "Ierrs", "Idrop"); + "Address", npkt_len, npkt_len, "Ipkts", + nerr_len, nerr_len, "Ierrs", nerr_len, nerr_len, "Idrop"); if (bflag) - xo_emit(" {T:/%10.10s}","Ibytes"); - xo_emit(" {T:/%8.8s} {T:/%5.5s}", "Opkts", "Oerrs"); + xo_emit(" {T:/%*.*s}", nbyte_len, nbyte_len, "Ibytes"); + xo_emit(" {T:/%*.*s} {T:/%*.*s}", npkt_len, npkt_len, "Opkts", + nerr_len, nerr_len, "Oerrs"); if (bflag) - xo_emit(" {T:/%10.10s}","Obytes"); - xo_emit(" {T:/%5s}", "Coll"); + xo_emit(" {T:/%*.*s}", nbyte_len, nbyte_len, "Obytes"); + xo_emit(" {T:/%*s}", nerr_len, "Coll"); if (dflag) - xo_emit(" {T:/%5.5s}", "Drop"); + xo_emit(" {T:/%*.*s}", nerr_len, nerr_len, "Drop"); xo_emit("\n"); } for (ifa = ifap; ifa; ifa = ifa->ifa_next) { bool network = false, link = false; char *name, *xname, buf[IFNAMSIZ+1]; - const char *nn, *rn; if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0) continue; @@ -371,72 +477,29 @@ intpr(void (*pfunc)(char *), int af) show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0); #undef IFA_MTU - switch (ifa->ifa_addr->sa_family) { - case AF_UNSPEC: - xo_emit("{:network/%-*.*s} ", net_len, net_len, - "none"); - xo_emit("{:address/%-*.*s} ", addr_len, addr_len, - "none"); - break; - case AF_INET: -#ifdef INET6 - case AF_INET6: -#endif /* INET6 */ - nn = netname(ifa->ifa_addr, ifa->ifa_netmask); - rn = routename(ifa->ifa_addr, numeric_addr); - if (Wflag) { - xo_emit("{t:network/%-*s} ", net_len, nn); - xo_emit("{t:address/%-*s} ", addr_len, rn); - } else { - xo_emit("{d:network/%-*.*s}{et:network} ", - net_len, net_len, nn, nn); - xo_emit("{d:address/%-*.*s}{et:address} ", - addr_len, addr_len, rn, rn); - } - - network = true; - break; - case AF_LINK: - { - struct sockaddr_dl *sdl; - char linknum[sizeof("")]; - - sdl = (struct sockaddr_dl *)ifa->ifa_addr; - snprintf(linknum, sizeof(linknum), "", sdl->sdl_index); - xo_emit("{t:network/%-*.*s} ", net_len, net_len, - linknum); - if (sdl->sdl_nlen == 0 && - sdl->sdl_alen == 0 && - sdl->sdl_slen == 0) - xo_emit("{P:/%*s} ", addr_len, ""); - else - xo_emit("{t:address/%-*.*s} ", addr_len, - addr_len, routename(ifa->ifa_addr, 1)); - link = true; - break; - } - } + process_ifa_addr(EMIT, ifa, &net_len, &addr_len, + &network, &link); -#define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s) - show_stat("lu", 8, "received-packets", IFA_STAT(ipackets), - link|network, 1); - show_stat("lu", 5, "received-errors", IFA_STAT(ierrors), + show_stat("lu", npkt_len, "received-packets", + IFA_STAT(ipackets), link|network, 1); + show_stat("lu", nerr_len, "received-errors", IFA_STAT(ierrors), link, 1); - show_stat("lu", 5, "dropped-packets", IFA_STAT(iqdrops), + show_stat("lu", nerr_len, "dropped-packets", IFA_STAT(iqdrops), link, 1); if (bflag) - show_stat("lu", 10, "received-bytes", IFA_STAT(ibytes), - link|network, 0); - show_stat("lu", 8, "sent-packets", IFA_STAT(opackets), + show_stat("lu", nbyte_len, "received-bytes", + IFA_STAT(ibytes), link|network, 0); + show_stat("lu", npkt_len, "sent-packets", IFA_STAT(opackets), link|network, 1); - show_stat("lu", 5, "send-errors", IFA_STAT(oerrors), link, 1); + show_stat("lu", nerr_len, "send-errors", IFA_STAT(oerrors), + link, 1); if (bflag) - show_stat("lu", 10, "sent-bytes", IFA_STAT(obytes), - link|network, 0); - show_stat("NRSlu", 5, "collisions", IFA_STAT(collisions), + show_stat("lu", nbyte_len, "sent-bytes", + IFA_STAT(obytes), link|network, 0); + show_stat("NRSlu", nerr_len, "collisions", IFA_STAT(collisions), link, 1); if (dflag) - show_stat("LSlu", 5, "dropped-packets", + show_stat("LSlu", nerr_len, "dropped-packets", IFA_STAT(oqdrops), link, 1); xo_emit("\n"); diff --git a/usr.bin/netstat/netstat.1 b/usr.bin/netstat/netstat.1 index e2ea7047456c..3ba0b1d191f6 100644 --- a/usr.bin/netstat/netstat.1 +++ b/usr.bin/netstat/netstat.1 @@ -308,6 +308,9 @@ See Avoid truncating addresses even if this causes some fields to overflow. See .Sx GENERAL OPTIONS . +However, in most cases field widths are determined automatically with the +.Fl i +option, and this option has little effect. .It Fl f Ar protocol_family Filter by .Ar protocol_family .