diff options
author | 1998-11-15 20:07:31 +0000 | |
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committer | 1998-11-15 20:07:31 +0000 | |
commit | 49d6a0009c6ab09ed184028a082a098d455a34f2 (patch) | |
tree | f3e03429bb25dd641148c70cd8af596732c162f0 /arp.c | |
parent | - Use numerical sort for interface sorting. (diff) | |
download | net-tools-49d6a0009c6ab09ed184028a082a098d455a34f2.tar.gz net-tools-49d6a0009c6ab09ed184028a082a098d455a34f2.tar.bz2 net-tools-49d6a0009c6ab09ed184028a082a098d455a34f2.zip |
Yow. This is net-tools completely reindented.
Some other cleanups:
- lib/net-string.c removed because it was not used and had a copyright notice
that conflicted with the GPL.
- Minor cleanups.
- Fix an potential buffer overflow in ax25.
- Switch to CVS $Id$ for versioning consistently
Diffstat (limited to 'arp.c')
-rw-r--r-- | arp.c | 1143 |
1 files changed, 570 insertions, 573 deletions
@@ -1,53 +1,53 @@ /* - * arp This file contains an implementation of the command - * that maintains the kernel's ARP cache. It is derived - * from Berkeley UNIX arp(8), but cleaner and with sup- - * port for devices other than Ethernet. + * arp This file contains an implementation of the command + * that maintains the kernel's ARP cache. It is derived + * from Berkeley UNIX arp(8), but cleaner and with sup- + * port for devices other than Ethernet. * - * NET-TOOLS A collection of programs that form the base set of the - * NET-3 Networking Distribution for the LINUX operating - * system. + * NET-TOOLS A collection of programs that form the base set of the + * NET-3 Networking Distribution for the LINUX operating + * system. * - * Version: arp 1.83 (1998-02-13) + * Version: $Id: arp.c,v 1.9 1998/11/15 20:07:31 freitag Exp $ * - * Maintainer: Bernd 'eckes' Eckenfels, <net-tools@lina.inka.de> + * Maintainer: Bernd 'eckes' Eckenfels, <net-tools@lina.inka.de> * - * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> + * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> * * Changes: - * (based on work from Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>) - * Alan Cox : modified for NET3 - * Andrew Tridgell : proxy arp netmasks - * Bernd Eckenfels : -n option - * Bernd Eckenfels : Use only /proc for display - * {1.60} Bernd Eckenfels : new arpcode (-i) for 1.3.42 but works - * with 1.2.x, too - * {1.61} Bernd Eckenfels : more verbose messages - * {1.62} Bernd Eckenfels : check -t for hw adresses and try to - * explain EINVAL (jeff) - *970125 {1.63} Bernd Eckenfels : -a print hardwarename instead of tiltle - *970201 {1.64} Bernd Eckenfels : net-features.h support - *970203 {1.65} Bernd Eckenfels : "#define" in "#if", - * -H|-A additional to -t|-p - *970214 {1.66} Bernd Eckenfels : Fix optarg required for -H and -A - *970412 {1.67} Bernd Eckenfels : device=""; is default - *970514 {1.68} Bernd Eckenfels : -N and -D - *970517 {1.69} Bernd Eckenfels : usage() fixed - *970622 {1.70} Bernd Eckenfels : arp -d priv - *970106 {1.80} Bernd Eckenfels : new syntax without -D and with "dev <If>", - * ATF_MAGIC, ATF_DONTPUB support. - * Typo fix (Debian Bug#5728 Giuliano Procida) - *970803 {1.81} Bernd Eckenfels : removed junk comment line 1 - *970925 {1.82} Bernd Eckenfels : include fix for libc6 - *980213 (1.83) Phil Blundell: set ATF_COM on new entries + * (based on work from Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>) + * Alan Cox : modified for NET3 + * Andrew Tridgell : proxy arp netmasks + * Bernd Eckenfels : -n option + * Bernd Eckenfels : Use only /proc for display + * {1.60} Bernd Eckenfels : new arpcode (-i) for 1.3.42 but works + * with 1.2.x, too + * {1.61} Bernd Eckenfels : more verbose messages + * {1.62} Bernd Eckenfels : check -t for hw adresses and try to + * explain EINVAL (jeff) + *970125 {1.63} Bernd Eckenfels : -a print hardwarename instead of tiltle + *970201 {1.64} Bernd Eckenfels : net-features.h support + *970203 {1.65} Bernd Eckenfels : "#define" in "#if", + * -H|-A additional to -t|-p + *970214 {1.66} Bernd Eckenfels : Fix optarg required for -H and -A + *970412 {1.67} Bernd Eckenfels : device=""; is default + *970514 {1.68} Bernd Eckenfels : -N and -D + *970517 {1.69} Bernd Eckenfels : usage() fixed + *970622 {1.70} Bernd Eckenfels : arp -d priv + *970106 {1.80} Bernd Eckenfels : new syntax without -D and with "dev <If>", + * ATF_MAGIC, ATF_DONTPUB support. + * Typo fix (Debian Bug#5728 Giuliano Procida) + *970803 {1.81} Bernd Eckenfels : removed junk comment line 1 + *970925 {1.82} Bernd Eckenfels : include fix for libc6 + *980213 (1.83) Phil Blundell: set ATF_COM on new entries *980629 (1.84) Arnaldo Carvalho de Melo: gettext instead of catgets * * - * This program is free software; you can redistribute 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. + * This program is free software; you can redistribute 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. */ #include <sys/types.h> #include <sys/socket.h> @@ -76,693 +76,690 @@ #define FEATURE_ARP #include "lib/net-features.h" -char *Release = RELEASE, - *Version = "arp 1.84 (1998-06-29)"; - -int opt_n = 0; /* do not resolve addresses */ -int opt_N = 0; /* use symbolic names */ -int opt_v = 0; /* debugging output flag */ -int opt_D = 0; /* HW-address is devicename */ -int opt_e = 0; /* 0=BSD output, 1=new linux */ -int opt_a = 0; /* all entries, substring match */ -struct aftype *ap; /* current address family */ -struct hwtype *hw; /* current hardware type */ -int sockfd=0; /* active socket descriptor */ -int hw_set = 0; /* flag if hw-type was set (-H) */ -char device[16]=""; /* current device */ +char *Release = RELEASE, *Version = "arp 1.84 (1998-06-29)"; + +int opt_n = 0; /* do not resolve addresses */ +int opt_N = 0; /* use symbolic names */ +int opt_v = 0; /* debugging output flag */ +int opt_D = 0; /* HW-address is devicename */ +int opt_e = 0; /* 0=BSD output, 1=new linux */ +int opt_a = 0; /* all entries, substring match */ +struct aftype *ap; /* current address family */ +struct hwtype *hw; /* current hardware type */ +int sockfd = 0; /* active socket descriptor */ +int hw_set = 0; /* flag if hw-type was set (-H) */ +char device[16] = ""; /* current device */ static void usage(void); /* Delete an entry from the ARP cache. */ -static int -arp_del(char **args) +static int arp_del(char **args) { - char host[128]; - struct arpreq req; - struct sockaddr sa; - int flags=0; - int err; + char host[128]; + struct arpreq req; + struct sockaddr sa; + int flags = 0; + int err; - memset((char *) &req, 0, sizeof(req)); + memset((char *) &req, 0, sizeof(req)); - /* Resolve the host name. */ - if (*args == NULL) { + /* Resolve the host name. */ + if (*args == NULL) { fprintf(stderr, _("arp: need host name\n")); - return(-1); - } - host[(sizeof host)-1] = 0; - strncpy(host, *args, (sizeof host)-1); - if (ap->input(0, host, &sa) < 0) { + return (-1); + } + host[(sizeof host) - 1] = 0; + strncpy(host, *args, (sizeof host) - 1); + if (ap->input(0, host, &sa) < 0) { ap->herror(host); - return(-1); - } - - /* If a host has more than one address, use the correct one! */ - memcpy((char *) &req.arp_pa, (char *) &sa, sizeof(struct sockaddr)); - - if (hw_set) - req.arp_ha.sa_family=hw->type; - - req.arp_flags=ATF_PERM; - args++; - while (*args != NULL) { - if (opt_v) fprintf(stderr,"args=%s\n",*args); - if (! strcmp(*args, "pub")) { - flags |= 1; - args++; - continue; + return (-1); + } + /* If a host has more than one address, use the correct one! */ + memcpy((char *) &req.arp_pa, (char *) &sa, sizeof(struct sockaddr)); + + if (hw_set) + req.arp_ha.sa_family = hw->type; + + req.arp_flags = ATF_PERM; + args++; + while (*args != NULL) { + if (opt_v) + fprintf(stderr, "args=%s\n", *args); + if (!strcmp(*args, "pub")) { + flags |= 1; + args++; + continue; } - if (! strcmp(*args, "priv")) { - flags |= 2; - args++; - continue; + if (!strcmp(*args, "priv")) { + flags |= 2; + args++; + continue; } - if (! strcmp(*args, "temp")) { - req.arp_flags &= ~ATF_PERM; - args++; - continue; + if (!strcmp(*args, "temp")) { + req.arp_flags &= ~ATF_PERM; + args++; + continue; } - if (! strcmp(*args, "trail")) { - req.arp_flags |= ATF_USETRAILERS; - args++; - continue; + if (!strcmp(*args, "trail")) { + req.arp_flags |= ATF_USETRAILERS; + args++; + continue; } - if (! strcmp(*args, "dontpub")) { + if (!strcmp(*args, "dontpub")) { #ifdef HAVE_ATF_DONTPUB - req.arp_flags |= ATF_DONTPUB; + req.arp_flags |= ATF_DONTPUB; #else - ENOSUPP("arp", "ATF_DONTPUB"); + ENOSUPP("arp", "ATF_DONTPUB"); #endif - args++; - continue; + args++; + continue; } - if (! strcmp(*args, "auto")) { + if (!strcmp(*args, "auto")) { #ifdef HAVE_ATF_MAGIC - req.arp_flags |= ATF_MAGIC; + req.arp_flags |= ATF_MAGIC; #else - ENOSUPP("arp", "ATF_MAGIC"); + ENOSUPP("arp", "ATF_MAGIC"); #endif - args++; - continue; + args++; + continue; } - if (! strcmp(*args, "dev")) { - if (*++args == NULL) usage(); - strncpy(device,*args,sizeof(device)-1); - device[sizeof(device)-1]='\0'; - args++; - continue; + if (!strcmp(*args, "dev")) { + if (*++args == NULL) + usage(); + strncpy(device, *args, sizeof(device) - 1); + device[sizeof(device) - 1] = '\0'; + args++; + continue; } - if (! strcmp(*args, "netmask")) { - if (*++args == NULL) usage(); - if (strcmp(*args,"255.255.255.255") != 0) { - strcpy(host, *args); - if (ap->input(0, host, &sa) < 0) { - ap->herror(host); - return(-1); - } - memcpy((char *) &req.arp_netmask, (char *) &sa, - sizeof(struct sockaddr)); - req.arp_flags |= ATF_NETMASK; - } - args++; - continue; - } - usage(); - } - if (flags == 0) - flags = 3; - - strcpy(req.arp_dev,device); - - err = -1; - - /* Call the kernel. */ - if (flags & 2) { - if (opt_v) fprintf(stderr,"arp: SIOCDARP(nopub)\n"); - if ((err = ioctl(sockfd, SIOCDARP, &req) < 0)) { - if (errno == ENXIO) { - if (flags & 1) - goto nopub; - printf(_("No ARP entry for %s\n"), host); - return(-1); - } - perror("SIOCDARP(priv)"); - return(-1); - } - } - if ((flags & 1) && (err)) { -nopub: - req.arp_flags |= ATF_PUBL; - if (opt_v) fprintf(stderr,"arp: SIOCDARP(pub)\n"); - if (ioctl(sockfd, SIOCDARP, &req) < 0) { - if (errno == ENXIO) { - printf(_("No ARP entry for %s\n"), host); - return(-1); + if (!strcmp(*args, "netmask")) { + if (*++args == NULL) + usage(); + if (strcmp(*args, "255.255.255.255") != 0) { + strcpy(host, *args); + if (ap->input(0, host, &sa) < 0) { + ap->herror(host); + return (-1); } - perror("SIOCDARP(pub)"); - return(-1); - } - } - - return(0); + memcpy((char *) &req.arp_netmask, (char *) &sa, + sizeof(struct sockaddr)); + req.arp_flags |= ATF_NETMASK; + } + args++; + continue; + } + usage(); + } + if (flags == 0) + flags = 3; + + strcpy(req.arp_dev, device); + + err = -1; + + /* Call the kernel. */ + if (flags & 2) { + if (opt_v) + fprintf(stderr, "arp: SIOCDARP(nopub)\n"); + if ((err = ioctl(sockfd, SIOCDARP, &req) < 0)) { + if (errno == ENXIO) { + if (flags & 1) + goto nopub; + printf(_("No ARP entry for %s\n"), host); + return (-1); + } + perror("SIOCDARP(priv)"); + return (-1); + } + } + if ((flags & 1) && (err)) { + nopub: + req.arp_flags |= ATF_PUBL; + if (opt_v) + fprintf(stderr, "arp: SIOCDARP(pub)\n"); + if (ioctl(sockfd, SIOCDARP, &req) < 0) { + if (errno == ENXIO) { + printf(_("No ARP entry for %s\n"), host); + return (-1); + } + perror("SIOCDARP(pub)"); + return (-1); + } + } + return (0); } /* Get the hardware address to a specified interface name */ -static int -arp_getdevhw(char *ifname, struct sockaddr *sa, struct hwtype *hw) +static int arp_getdevhw(char *ifname, struct sockaddr *sa, struct hwtype *hw) { - struct ifreq ifr; - struct hwtype *xhw; - - strcpy(ifr.ifr_name, ifname); - if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) < 0) { - fprintf(stderr,"arp: cant get HW-Address for `%s': %s.\n", ifname, strerror(errno)); - return(-1); - } - if (hw && (ifr.ifr_hwaddr.sa_family!=hw->type)) { - fprintf(stderr,"arp: protocol type missmatch.\n"); - return(-1); - } - memcpy((char *)sa, (char *)&(ifr.ifr_hwaddr), sizeof(struct sockaddr)); - - if (opt_v) { - if (!(xhw = get_hwntype(ifr.ifr_hwaddr.sa_family)) || (xhw->sprint==0)) { - xhw = get_hwntype(-1); - } - fprintf(stderr, "arp: device `%s' has HW address %s `%s'.\n",ifname, xhw->name, xhw->sprint(&ifr.ifr_hwaddr)); - } - return(0); + struct ifreq ifr; + struct hwtype *xhw; + + strcpy(ifr.ifr_name, ifname); + if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) < 0) { + fprintf(stderr, "arp: cant get HW-Address for `%s': %s.\n", ifname, strerror(errno)); + return (-1); + } + if (hw && (ifr.ifr_hwaddr.sa_family != hw->type)) { + fprintf(stderr, "arp: protocol type missmatch.\n"); + return (-1); + } + memcpy((char *) sa, (char *) &(ifr.ifr_hwaddr), sizeof(struct sockaddr)); + + if (opt_v) { + if (!(xhw = get_hwntype(ifr.ifr_hwaddr.sa_family)) || (xhw->sprint == 0)) { + xhw = get_hwntype(-1); + } + fprintf(stderr, "arp: device `%s' has HW address %s `%s'.\n", ifname, xhw->name, xhw->sprint(&ifr.ifr_hwaddr)); + } + return (0); } /* Set an entry in the ARP cache. */ -static int -arp_set(char **args) +static int arp_set(char **args) { - char host[128]; - struct arpreq req; - struct sockaddr sa; - int flags; + char host[128]; + struct arpreq req; + struct sockaddr sa; + int flags; - memset((char *) &req, 0, sizeof(req)); + memset((char *) &req, 0, sizeof(req)); - /* Resolve the host name. */ - if (*args == NULL) { + /* Resolve the host name. */ + if (*args == NULL) { fprintf(stderr, _("arp: need host name\n")); - return(-1); - } - host[(sizeof host)-1] = 0; - strncpy(host, *args++, (sizeof host)-1); - if (ap->input(0, host, &sa) < 0) { + return (-1); + } + host[(sizeof host) - 1] = 0; + strncpy(host, *args++, (sizeof host) - 1); + if (ap->input(0, host, &sa) < 0) { ap->herror(host); - return(-1); - } - - /* If a host has more than one address, use the correct one! */ - memcpy((char *) &req.arp_pa, (char *) &sa, sizeof(struct sockaddr)); + return (-1); + } + /* If a host has more than one address, use the correct one! */ + memcpy((char *) &req.arp_pa, (char *) &sa, sizeof(struct sockaddr)); - /* Fetch the hardware address. */ - if (*args == NULL) { + /* Fetch the hardware address. */ + if (*args == NULL) { fprintf(stderr, _("arp: need hardware address\n")); - return(-1); - } - - if (opt_D) { - if (arp_getdevhw(*args++, &req.arp_ha, hw_set?hw:NULL) < 0) - return(-1); - } else { - if (hw->input(*args++, &req.arp_ha) < 0) { - fprintf(stderr, _("arp: invalid hardware address\n")); - return(-1); + return (-1); } - } - - /* Check out any modifiers. */ - flags = ATF_PERM | ATF_COM; - while (*args != NULL) { - if (! strcmp(*args, "temp")) { - flags &= ~ATF_PERM; - args++; - continue; + if (opt_D) { + if (arp_getdevhw(*args++, &req.arp_ha, hw_set ? hw : NULL) < 0) + return (-1); + } else { + if (hw->input(*args++, &req.arp_ha) < 0) { + fprintf(stderr, _("arp: invalid hardware address\n")); + return (-1); } - if (! strcmp(*args, "pub")) { - flags |= ATF_PUBL; - args++; - continue; + } + + /* Check out any modifiers. */ + flags = ATF_PERM | ATF_COM; + while (*args != NULL) { + if (!strcmp(*args, "temp")) { + flags &= ~ATF_PERM; + args++; + continue; } - if (! strcmp(*args, "priv")) { - flags &= ~ATF_PUBL; - args++; - continue; + if (!strcmp(*args, "pub")) { + flags |= ATF_PUBL; + args++; + continue; } - if (! strcmp(*args, "trail")) { - flags |= ATF_USETRAILERS; - args++; - continue; + if (!strcmp(*args, "priv")) { + flags &= ~ATF_PUBL; + args++; + continue; + } + if (!strcmp(*args, "trail")) { + flags |= ATF_USETRAILERS; + args++; + continue; } - if (! strcmp(*args, "dontpub")) { + if (!strcmp(*args, "dontpub")) { #ifdef HAVE_ATF_DONTPUB - flags |= ATF_DONTPUB; + flags |= ATF_DONTPUB; #else - ENOSUPP("arp", "ATF_DONTPUB"); + ENOSUPP("arp", "ATF_DONTPUB"); #endif - args++; - continue; + args++; + continue; } - - if (! strcmp(*args, "auto")) { + if (!strcmp(*args, "auto")) { #ifdef HAVE_ATF_MAGIC - flags |= ATF_MAGIC; + flags |= ATF_MAGIC; #else - ENOSUPP("arp", "ATF_MAGIC"); + ENOSUPP("arp", "ATF_MAGIC"); #endif - args++; - continue; + args++; + continue; } - if (! strcmp(*args, "dev")) { - if (*++args == NULL) usage(); - strncpy(device,*args,sizeof(device)-1); - device[sizeof(device)-1]='\0'; - args++; - continue; + if (!strcmp(*args, "dev")) { + if (*++args == NULL) + usage(); + strncpy(device, *args, sizeof(device) - 1); + device[sizeof(device) - 1] = '\0'; + args++; + continue; } - - if (! strcmp(*args, "netmask")) { - if (*++args == NULL) usage(); - if (strcmp(*args,"255.255.255.255") != 0) { - strcpy(host, *args); - if (ap->input(0, host, &sa) < 0) { - ap->herror(host); - return(-1); - } - memcpy((char *) &req.arp_netmask, (char *) &sa, - sizeof(struct sockaddr)); - flags |= ATF_NETMASK; - } - args++; - continue; + if (!strcmp(*args, "netmask")) { + if (*++args == NULL) + usage(); + if (strcmp(*args, "255.255.255.255") != 0) { + strcpy(host, *args); + if (ap->input(0, host, &sa) < 0) { + ap->herror(host); + return (-1); + } + memcpy((char *) &req.arp_netmask, (char *) &sa, + sizeof(struct sockaddr)); + flags |= ATF_NETMASK; + } + args++; + continue; } usage(); - } + } - /* Fill in the remainder of the request. */ - req.arp_flags = flags; + /* Fill in the remainder of the request. */ + req.arp_flags = flags; - strcpy(req.arp_dev,device); + strcpy(req.arp_dev, device); - /* Call the kernel. */ - if (opt_v) fprintf(stderr,"arp: SIOCSARP()\n"); - if (ioctl(sockfd, SIOCSARP, &req) < 0) { + /* Call the kernel. */ + if (opt_v) + fprintf(stderr, "arp: SIOCSARP()\n"); + if (ioctl(sockfd, SIOCSARP, &req) < 0) { if (errno != EINVAL) { - perror("SIOCSARP"); - return(-1); + perror("SIOCSARP"); + return (-1); } - } - - return(0); + } + return (0); } /* Process an EtherFile */ -static int -arp_file(char *name) +static int arp_file(char *name) { - char buff[1024]; - char *sp, *args[32]; - int linenr, argc; - FILE *fp; + char buff[1024]; + char *sp, *args[32]; + int linenr, argc; + FILE *fp; - if ((fp = fopen(name, "r")) == NULL) { + if ((fp = fopen(name, "r")) == NULL) { fprintf(stderr, _("arp: cannot open etherfile %s !\n"), name); - return(-1); - } - - /* Read the lines in the file. */ - linenr = 0; - while (fgets(buff, sizeof(buff), fp) != (char *)NULL) { + return (-1); + } + /* Read the lines in the file. */ + linenr = 0; + while (fgets(buff, sizeof(buff), fp) != (char *) NULL) { linenr++; - if (opt_v == 1) fprintf(stderr, ">> %s", buff); - if ((sp = strchr(buff, '\n')) != (char *)NULL) *sp = '\0'; - if (buff[0] == '#' || buff[0] == '\0') continue; + if (opt_v == 1) + fprintf(stderr, ">> %s", buff); + if ((sp = strchr(buff, '\n')) != (char *) NULL) + *sp = '\0'; + if (buff[0] == '#' || buff[0] == '\0') + continue; argc = getargs(buff, args); if (argc < 2) { - fprintf(stderr, _("arp: format error on line %u of etherfile %s !\n"), - linenr, name); - continue; + fprintf(stderr, _("arp: format error on line %u of etherfile %s !\n"), + linenr, name); + continue; } - if (arp_set(args) != 0) - fprintf(stderr, _("arp: cannot set entry on line %u of etherfile %s !\n"), - linenr, name); - } + fprintf(stderr, _("arp: cannot set entry on line %u of etherfile %s !\n"), + linenr, name); + } - (void) fclose(fp); - return(0); + (void) fclose(fp); + return (0); } /* Print the contents of an ARP request block. */ -static void -arp_disp_2(char *name,int type,int arp_flags,char *hwa,char *mask,char *dev) +static void arp_disp_2(char *name, int type, int arp_flags, char *hwa, char *mask, char *dev) { - static int title = 0; - struct hwtype *xhw; - char flags[10]; - - xhw = get_hwntype(type); - if (xhw == NULL) - xhw = get_hwtype(DFLT_HW); - - if (title++ == 0) { - printf(_("Address\t\t\tHWtype\tHWaddress\t Flags Mask\t\t Iface\n")); - } - /* Setup the flags. */ - flags[0] = '\0'; - if (arp_flags & ATF_COM) strcat(flags, "C"); - if (arp_flags & ATF_PERM) strcat(flags, "M"); - if (arp_flags & ATF_PUBL) strcat(flags, "P"); + static int title = 0; + struct hwtype *xhw; + char flags[10]; + + xhw = get_hwntype(type); + if (xhw == NULL) + xhw = get_hwtype(DFLT_HW); + + if (title++ == 0) { + printf(_("Address\t\t\tHWtype\tHWaddress\t Flags Mask\t\t Iface\n")); + } + /* Setup the flags. */ + flags[0] = '\0'; + if (arp_flags & ATF_COM) + strcat(flags, "C"); + if (arp_flags & ATF_PERM) + strcat(flags, "M"); + if (arp_flags & ATF_PUBL) + strcat(flags, "P"); #ifdef HAVE_ATF_MAGIC - if (arp_flags & ATF_MAGIC) strcat(flags, "A"); + if (arp_flags & ATF_MAGIC) + strcat(flags, "A"); #endif #ifdef HAVE_ATF_DONTPUB - if (arp_flags & ATF_DONTPUB) strcat(flags, "!"); + if (arp_flags & ATF_DONTPUB) + strcat(flags, "!"); #endif - if (arp_flags & ATF_USETRAILERS) strcat(flags, "T"); + if (arp_flags & ATF_USETRAILERS) + strcat(flags, "T"); - if (!(arp_flags & ATF_NETMASK)) mask=""; + if (!(arp_flags & ATF_NETMASK)) + mask = ""; - printf("%-23.23s\t", name); + printf("%-23.23s\t", name); - if (!(arp_flags & ATF_COM)) { + if (!(arp_flags & ATF_COM)) { if (arp_flags & ATF_PUBL) - printf("%-8.8s%-20.20s","*","*"); + printf("%-8.8s%-20.20s", "*", "*"); else - printf("%-8.8s%-20.20s","","(incomplete)"); - } else { + printf("%-8.8s%-20.20s", "", "(incomplete)"); + } else { printf("%-8.8s%-20.20s", xhw->name, hwa); - } + } - printf("%-6.6s%-15.15s %s\n", flags,mask,dev); + printf("%-6.6s%-15.15s %s\n", flags, mask, dev); } /* Print the contents of an ARP request block. */ -static void -arp_disp(char *name, char *ip, int type,int arp_flags,char *hwa,char *mask,char *dev) +static void arp_disp(char *name, char *ip, int type, int arp_flags, char *hwa, char *mask, char *dev) { - struct hwtype *xhw; - - xhw = get_hwntype(type); - if (xhw == NULL) - xhw = get_hwtype(DFLT_HW); - + struct hwtype *xhw; + xhw = get_hwntype(type); + if (xhw == NULL) + xhw = get_hwtype(DFLT_HW); - printf("%s (%s) at ", name, ip); + printf("%s (%s) at ", name, ip); - if (!(arp_flags & ATF_COM)) { + if (!(arp_flags & ATF_COM)) { if (arp_flags & ATF_PUBL) - printf("* "); + printf("* "); else - printf("<incomplete> "); - } else { + printf("<incomplete> "); + } else { printf("%s [%s] ", hwa, xhw->name); - } - - if (arp_flags & ATF_NETMASK) + } + + if (arp_flags & ATF_NETMASK) printf("netmask %s ", mask); - - if (arp_flags & ATF_PERM) printf("PERM "); - if (arp_flags & ATF_PUBL) printf("PUP "); + + if (arp_flags & ATF_PERM) + printf("PERM "); + if (arp_flags & ATF_PUBL) + printf("PUP "); #ifdef HAVE_ATF_MAGIC - if (arp_flags & ATF_MAGIC) printf("AUTO "); + if (arp_flags & ATF_MAGIC) + printf("AUTO "); #endif #ifdef HAVE_ATF_DONTPUB - if (arp_flags & ATF_DONTPUB) printf("DONTPUB "); + if (arp_flags & ATF_DONTPUB) + printf("DONTPUB "); #endif - if (arp_flags & ATF_USETRAILERS) printf("TRAIL "); + if (arp_flags & ATF_USETRAILERS) + printf("TRAIL "); - printf("on %s\n", dev); + printf("on %s\n", dev); } /* Display the contents of the ARP cache in the kernel. */ -static int -arp_show(char *name) +static int arp_show(char *name) { - char host[100]; - struct sockaddr sa; - char ip[100]; - char hwa[100]; - char mask[100]; - char line[200]; - char dev[100]; - int type,flags; - FILE *fp; - char *hostname; - int num,entries=0,showed=0; - - host[0]='\0'; - - if (name != NULL) { - /* Resolve the host name. */ - host[(sizeof host)-1] = 0; - strncpy(host, name, (sizeof host)-1); - if (ap->input(0, host, &sa) < 0) { - ap->herror(host); - return(-1); - } - strcpy(host,ap->sprint(&sa, 1)); - } - - /* Open the PROCps kernel table. */ - if ((fp = fopen(_PATH_PROCNET_ARP, "r")) == NULL) { + char host[100]; + struct sockaddr sa; + char ip[100]; + char hwa[100]; + char mask[100]; + char line[200]; + char dev[100]; + int type, flags; + FILE *fp; + char *hostname; + int num, entries = 0, showed = 0; + + host[0] = '\0'; + + if (name != NULL) { + /* Resolve the host name. */ + host[(sizeof host) - 1] = 0; + strncpy(host, name, (sizeof host) - 1); + if (ap->input(0, host, &sa) < 0) { + ap->herror(host); + return (-1); + } + strcpy(host, ap->sprint(&sa, 1)); + } + /* Open the PROCps kernel table. */ + if ((fp = fopen(_PATH_PROCNET_ARP, "r")) == NULL) { perror(_PATH_PROCNET_ARP); - return(-1); - } - - /* Bypass header -- read until newline */ - if (fgets(line, sizeof(line), fp) != (char *)NULL) { - strcpy(mask,"-"); - strcpy(dev,"-"); + return (-1); + } + /* Bypass header -- read until newline */ + if (fgets(line, sizeof(line), fp) != (char *) NULL) { + strcpy(mask, "-"); + strcpy(dev, "-"); /* Read the ARP cache entries. */ - for(;fgets(line,sizeof(line),fp);) - { - num=sscanf(line,"%s 0x%x 0x%x %100s %100s %100s\n", - ip,&type,&flags,hwa,mask,dev); - if(num<4) - break; - - entries++; - /* if the user specified hw-type differs, skip it */ - if (hw_set && (type != hw->type)) - continue; - - /* if the user specified address differs, skip it */ - if (host[0] && strcmp(ip,host)) - continue; - - /* if the user specified device differs, skip it */ - if (device[0] && strcmp(dev,device)) - continue; - - showed++; - /* This IS ugly but it works -be */ - if (opt_n) - hostname="?"; - else { - if (ap->input(0, ip,&sa) < 0) - hostname=ip; - else - hostname = ap->sprint(&sa, opt_n | 0x8000); - if (strcmp(hostname, ip)==0) - hostname="?"; - } + for (; fgets(line, sizeof(line), fp);) { + num = sscanf(line, "%s 0x%x 0x%x %100s %100s %100s\n", + ip, &type, &flags, hwa, mask, dev); + if (num < 4) + break; + + entries++; + /* if the user specified hw-type differs, skip it */ + if (hw_set && (type != hw->type)) + continue; + + /* if the user specified address differs, skip it */ + if (host[0] && strcmp(ip, host)) + continue; - if (opt_e) - arp_disp_2(hostname[0]=='?'?ip:hostname,type,flags,hwa,mask,dev); + /* if the user specified device differs, skip it */ + if (device[0] && strcmp(dev, device)) + continue; + + showed++; + /* This IS ugly but it works -be */ + if (opt_n) + hostname = "?"; + else { + if (ap->input(0, ip, &sa) < 0) + hostname = ip; else - arp_disp(hostname,ip,type,flags,hwa,mask,dev); + hostname = ap->sprint(&sa, opt_n | 0x8000); + if (strcmp(hostname, ip) == 0) + hostname = "?"; + } + + if (opt_e) + arp_disp_2(hostname[0] == '?' ? ip : hostname, type, flags, hwa, mask, dev); + else + arp_disp(hostname, ip, type, flags, hwa, mask, dev); + } + } + if (opt_v) + printf(_("Entries: %d\tSkipped: %d\tFound: %d\n"), entries, entries - showed, showed); + + if (!showed) { + if (host[0] && !opt_a) + printf("%s (%s) -- no entry\n", name, host); + else if (hw_set || host[0] || device[0]) { + printf(_("arp: in %d entries no match found.\n"), entries); } - } - if (opt_v) - printf(_("Entries: %d\tSkipped: %d\tFound: %d\n"),entries,entries-showed,showed); - - if (!showed) { - if (host[0] && !opt_a) - printf("%s (%s) -- no entry\n", name, host); - else if (hw_set || host[0] || device[0]) { - printf(_("arp: in %d entries no match found.\n"),entries); - } - } - (void) fclose(fp); - return(0); + } + (void) fclose(fp); + return (0); } -static void -version(void) +static void version(void) { - fprintf(stderr, "%s\n%s\n%s\n",Release,Version,Features); - exit(-1); + fprintf(stderr, "%s\n%s\n%s\n", Release, Version, Features); + exit(-1); } -static void -usage(void) +static void usage(void) { - fprintf(stderr, _("Usage: arp [-vn] [-H type] [-i if] -a [hostname]\n")); - fprintf(stderr, _(" arp [-v] [-i if] -d hostname [pub][nopub]\n")); - fprintf(stderr, _(" arp [-v] [-H type] [-i if] -s hostname hw_addr [temp][nopub]\n")); - fprintf(stderr, _(" arp [-v] [-H type] [-i if] -s hostname hw_addr [netmask nm] pub\n")); - fprintf(stderr, _(" arp [-v] [-H type] [-i if] -Ds hostname if [netmask nm] pub\n")); - fprintf(stderr, _(" arp [-vnD] [-H type] [-i if] -f filename\n")); - exit(-1); + fprintf(stderr, _("Usage: arp [-vn] [-H type] [-i if] -a [hostname]\n")); + fprintf(stderr, _(" arp [-v] [-i if] -d hostname [pub][nopub]\n")); + fprintf(stderr, _(" arp [-v] [-H type] [-i if] -s hostname hw_addr [temp][nopub]\n")); + fprintf(stderr, _(" arp [-v] [-H type] [-i if] -s hostname hw_addr [netmask nm] pub\n")); + fprintf(stderr, _(" arp [-v] [-H type] [-i if] -Ds hostname if [netmask nm] pub\n")); + fprintf(stderr, _(" arp [-vnD] [-H type] [-i if] -f filename\n")); + exit(-1); } -int -main(int argc, char **argv) +int main(int argc, char **argv) { - int i, lop, what; - struct option longopts[]= - { - {"verbose", 0, 0, 'v'}, - {"version", 0, 0, 'V'}, - {"all", 0, 0, 'a'}, - {"delete", 0, 0, 'd'}, - {"file", 0, 0, 'f'}, - {"numeric", 0, 0, 'n'}, - {"set", 0, 0, 's'}, - {"protocol", 1, 0, 'A'}, - {"hw-type", 1, 0, 'H'}, - {"device", 0, 0, 'i'}, - {"help", 0, 0, 'h'}, - {"use-device", 0, 0, 'D'}, - {"symbolic", 0, 0, 'N'}, - {NULL, 0, 0, 0} - }; - + int i, lop, what; + struct option longopts[] = + { + {"verbose", 0, 0, 'v'}, + {"version", 0, 0, 'V'}, + {"all", 0, 0, 'a'}, + {"delete", 0, 0, 'd'}, + {"file", 0, 0, 'f'}, + {"numeric", 0, 0, 'n'}, + {"set", 0, 0, 's'}, + {"protocol", 1, 0, 'A'}, + {"hw-type", 1, 0, 'H'}, + {"device", 0, 0, 'i'}, + {"help", 0, 0, 'h'}, + {"use-device", 0, 0, 'D'}, + {"symbolic", 0, 0, 'N'}, + {NULL, 0, 0, 0} + }; + #if I18N - bindtextdomain("net-tools", "/usr/share/locale"); - textdomain("net-tools"); + bindtextdomain("net-tools", "/usr/share/locale"); + textdomain("net-tools"); #endif - /* Initialize variables... */ - if ((hw = get_hwtype(DFLT_HW)) == NULL) { + /* Initialize variables... */ + if ((hw = get_hwtype(DFLT_HW)) == NULL) { fprintf(stderr, _("%s: hardware type not supported!\n"), DFLT_HW); - return(-1); - } - if ((ap = get_aftype(DFLT_AF)) == NULL) { + return (-1); + } + if ((ap = get_aftype(DFLT_AF)) == NULL) { fprintf(stderr, _("%s: address family not supported!\n"), DFLT_AF); - return(-1); - } - what = 0; + return (-1); + } + what = 0; - /* Fetch the command-line arguments. */ - /* opterr = 0; */ - while ((i = getopt_long(argc, argv, "A:H:adfp:nsei:t:vh?DNV",longopts, &lop)) != EOF) switch(i) { + /* Fetch the command-line arguments. */ + /* opterr = 0; */ + while ((i = getopt_long(argc, argv, "A:H:adfp:nsei:t:vh?DNV", longopts, &lop)) != EOF) + switch (i) { case 'a': - what = 1; - opt_a = 1; - break; + what = 1; + opt_a = 1; + break; case 'f': - what = 2; - break; + what = 2; + break; case 'd': - what = 3; - break; + what = 3; + break; case 's': - what = 4; - break; + what = 4; + break; case 'e': - opt_e = 1; - break; + opt_e = 1; + break; case 'n': - opt_n = FLAG_NUM; - break; + opt_n = FLAG_NUM; + break; case 'D': - opt_D = 1; - break; + opt_D = 1; + break; case 'N': - opt_N = FLAG_SYM; - fprintf(stderr,"arp: -N not yet supported.\n"); - break; + opt_N = FLAG_SYM; + fprintf(stderr, "arp: -N not yet supported.\n"); + break; case 'v': - opt_v = 1; - break; + opt_v = 1; + break; case 'A': case 'p': - ap = get_aftype(optarg); - if (ap == NULL) { - fprintf(stderr, _("arp: %s: unknown address family.\n"), - optarg); - exit(-1); - } - break; + ap = get_aftype(optarg); + if (ap == NULL) { + fprintf(stderr, _("arp: %s: unknown address family.\n"), + optarg); + exit(-1); + } + break; case 'H': case 't': - hw = get_hwtype(optarg); - if (hw == NULL) { - fprintf(stderr, _("arp: %s: unknown hardware type.\n"), - optarg); - exit(-1); - } - hw_set = 1; - break; + hw = get_hwtype(optarg); + if (hw == NULL) { + fprintf(stderr, _("arp: %s: unknown hardware type.\n"), + optarg); + exit(-1); + } + hw_set = 1; + break; case 'i': - strncpy(device,optarg,sizeof(device)-1); - device[sizeof(device)-1]='\0'; - break; + strncpy(device, optarg, sizeof(device) - 1); + device[sizeof(device) - 1] = '\0'; + break; case 'V': - version(); + version(); case '?': case 'h': default: - usage(); - } + usage(); + } - if (ap->af != AF_INET) { + if (ap->af != AF_INET) { fprintf(stderr, _("arp: %s: kernel only supports 'inet'.\n"), - ap->name); + ap->name); exit(-1); - } - if (hw->alen <= 0) { + } + if (hw->alen <= 0) { fprintf(stderr, _("arp: %s: hardware type without ARP support.\n"), - hw->name); + hw->name); exit(-1); - } - if ((sockfd = socket(AF_INET,SOCK_DGRAM,0)) <0) - { - perror("socket"); - exit(-1); - } - - /* Now see what we have to do here... */ - switch(what) { - case 0: - opt_e = 1; - what = arp_show(argv[optind]); - break; - - case 1: /* show an ARP entry in the cache */ - what = arp_show(argv[optind]); - break; - - case 2: /* process an EtherFile */ - what = arp_file(argv[optind]); - break; - - case 3: /* delete an ARP entry from the cache */ - what = arp_del(&argv[optind]); - break; - - case 4: /* set an ARP entry in the cache */ - what = arp_set(&argv[optind]); - break; - - default: - usage(); - } + } + if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { + perror("socket"); + exit(-1); + } + /* Now see what we have to do here... */ + switch (what) { + case 0: + opt_e = 1; + what = arp_show(argv[optind]); + break; + + case 1: /* show an ARP entry in the cache */ + what = arp_show(argv[optind]); + break; + + case 2: /* process an EtherFile */ + what = arp_file(argv[optind]); + break; + + case 3: /* delete an ARP entry from the cache */ + what = arp_del(&argv[optind]); + break; + + case 4: /* set an ARP entry in the cache */ + what = arp_set(&argv[optind]); + break; + + default: + usage(); + } - exit(what); + exit(what); } |