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-rw-r--r--src/ipcalc.c501
1 files changed, 0 insertions, 501 deletions
diff --git a/src/ipcalc.c b/src/ipcalc.c
deleted file mode 100644
index 9108e4c2..00000000
--- a/src/ipcalc.c
+++ /dev/null
@@ -1,501 +0,0 @@
-/*
- * Copyright (c) 1997-2009 Red Hat, Inc. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Authors:
- * Erik Troan <ewt@redhat.com>
- * Preston Brown <pbrown@redhat.com>
- * David Cantrell <dcantrell@redhat.com>
- */
-
-#include <ctype.h>
-#include <popt.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <errno.h>
-
-/*!
- \file ipcalc.c
- \brief provides utilities for manipulating IP addresses.
-
- ipcalc provides utilities and a front-end command line interface for
- manipulating IP addresses, and calculating various aspects of an ip
- address/netmask/network address/prefix/etc.
-
- Functionality can be accessed from other languages from the library
- interface, documented here. To use ipcalc from the shell, read the
- ipcalc(1) manual page.
-
- When passing parameters to the various functions, take note of whether they
- take host byte order or network byte order. Most take host byte order, and
- return host byte order, but there are some exceptions.
-*/
-
-int safe_atoi(const char *s, int *ret_i) {
- char *x = NULL;
- long l;
-
- errno = 0;
- l = strtol(s, &x, 0);
-
- if (!x || x == s || *x || errno)
- return errno > 0 ? -errno : -EINVAL;
-
- if ((long) (int) l != l)
- return -ERANGE;
-
- *ret_i = (int) l;
- return 0;
-}
-
-
-/*!
- \fn struct in_addr prefix2mask(int bits)
- \brief creates a netmask from a specified number of bits
-
- This function converts a prefix length to a netmask. As CIDR (classless
- internet domain internet domain routing) has taken off, more an more IP
- addresses are being specified in the format address/prefix
- (i.e. 192.168.2.3/24, with a corresponding netmask 255.255.255.0). If you
- need to see what netmask corresponds to the prefix part of the address, this
- is the function. See also \ref mask2prefix.
-
- \param prefix is the number of bits to create a mask for.
- \return a network mask, in network byte order.
-*/
-struct in_addr prefix2mask(int prefix) {
- struct in_addr mask;
- memset(&mask, 0, sizeof(mask));
- if (prefix) {
- mask.s_addr = htonl(~((1 << (32 - prefix)) - 1));
- } else {
- mask.s_addr = htonl(0);
- }
- return mask;
-}
-
-/*!
- \fn int mask2prefix(struct in_addr mask)
- \brief calculates the number of bits masked off by a netmask.
-
- This function calculates the significant bits in an IP address as specified by
- a netmask. See also \ref prefix2mask.
-
- \param mask is the netmask, specified as an struct in_addr in network byte order.
- \return the number of significant bits. */
-int mask2prefix(struct in_addr mask)
-{
- int count;
- uint32_t saddr = ntohl(mask.s_addr);
-
- for (count=0; saddr > 0; count++) {
- saddr=saddr << 1;
- }
-
- return count;
-}
-
-/*!
- \fn struct in_addr default_netmask(struct in_addr addr)
-
- \brief returns the default (canonical) netmask associated with specified IP
- address.
-
- When the Internet was originally set up, various ranges of IP addresses were
- segmented into three network classes: A, B, and C. This function will return
- a netmask that is associated with the IP address specified defining where it
- falls in the predefined classes.
-
- \param addr an IP address in network byte order.
- \return a netmask in network byte order. */
-struct in_addr default_netmask(struct in_addr addr)
-{
- uint32_t saddr = addr.s_addr;
- struct in_addr mask;
-
- memset(&mask, 0, sizeof(mask));
-
- if (((ntohl(saddr) & 0xFF000000) >> 24) <= 127)
- mask.s_addr = htonl(0xFF000000);
- else if (((ntohl(saddr) & 0xFF000000) >> 24) <= 191)
- mask.s_addr = htonl(0xFFFF0000);
- else
- mask.s_addr = htonl(0xFFFFFF00);
-
- return mask;
-}
-
-/*!
- \fn struct in_addr calc_broadcast(struct in_addr addr, int prefix)
-
- \brief calculate broadcast address given an IP address and a prefix length.
-
- \param addr an IP address in network byte order.
- \param prefix a prefix length.
-
- \return the calculated broadcast address for the network, in network byte
- order.
-*/
-struct in_addr calc_broadcast(struct in_addr addr, int prefix)
-{
- struct in_addr mask = prefix2mask(prefix);
- struct in_addr broadcast;
-
- memset(&broadcast, 0, sizeof(broadcast));
-
-/* if prefix is set to 31 return 255.255.255.255 (RFC3021) */
- if (mask.s_addr == htonl(0xFFFFFFFE))
- broadcast.s_addr = htonl(0xFFFFFFFF);
- else
- broadcast.s_addr = (addr.s_addr & mask.s_addr) | ~mask.s_addr;
- return broadcast;
-}
-
-/*!
- \fn struct in_addr calc_network(struct in_addr addr, int prefix)
- \brief calculates the network address for a specified address and prefix.
-
- \param addr an IP address, in network byte order
- \param prefix the network prefix
- \return the base address of the network that addr is associated with, in
- network byte order.
-*/
-struct in_addr calc_network(struct in_addr addr, int prefix)
-{
- struct in_addr mask = prefix2mask(prefix);
- struct in_addr network;
-
- memset(&network, 0, sizeof(network));
- network.s_addr = addr.s_addr & mask.s_addr;
- return network;
-}
-
-/*!
- \fn const char *get_hostname(int family, void *addr)
- \brief returns the hostname associated with the specified IP address
-
- \param family the address family, either AF_INET or AF_INET6.
- \param addr an IP address to find a hostname for, in network byte order,
- should either be a pointer to a struct in_addr or a struct in6_addr.
-
- \return a hostname, or NULL if one cannot be determined. Hostname is stored
- in a static buffer that may disappear at any time, the caller should copy the
- data if it needs permanent storage.
-*/
-char *get_hostname(int family, void *addr)
-{
- struct hostent * hostinfo = NULL;
- int x;
- struct in_addr addr4;
- struct in6_addr addr6;
-
- if (family == AF_INET) {
- memset(&addr4, 0, sizeof(addr4));
- memcpy(&addr4, addr, sizeof(addr4));
- hostinfo = gethostbyaddr((const void *) &addr4,
- sizeof(addr4), family);
- } else if (family == AF_INET6) {
- memset(&addr6, 0, sizeof(addr6));
- memcpy(&addr6, addr, sizeof(addr6));
- hostinfo = gethostbyaddr((const void *) &addr6,
- sizeof(addr6), family);
- }
-
- if (!hostinfo)
- return NULL;
-
- for (x=0; hostinfo->h_name[x]; x++) {
- hostinfo->h_name[x] = tolower(hostinfo->h_name[x]);
- }
- return hostinfo->h_name;
-}
-
-/*!
- \fn main(int argc, const char **argv)
- \brief wrapper program for ipcalc functions.
-
- This is a wrapper program for the functions that the ipcalc library provides.
- It can be used from shell scripts or directly from the command line.
-
- For more information, please see the ipcalc(1) man page.
-*/
-int main(int argc, const char **argv) {
- int showBroadcast = 0, showPrefix = 0, showNetwork = 0;
- int showHostname = 0, showNetmask = 0;
- int beSilent = 0;
- int doCheck = 0, familyIPv4 = 0, familyIPv6 = 0;
- int rc;
- poptContext optCon;
- char *ipStr, *prefixStr, *netmaskStr, *chptr;
- char *hostName = NULL;
- char namebuf[INET6_ADDRSTRLEN+1];
- struct in_addr ip, netmask, network, broadcast;
- struct in6_addr ip6;
- int prefix = -1;
- char errBuf[250];
- struct poptOption optionsTable[] = {
- { "check", 'c', 0, &doCheck, 0,
- "Validate IP address for specified address family", },
- { "ipv4", '4', 0, &familyIPv4, 0,
- "IPv4 address family (default)", },
- { "ipv6", '6', 0, &familyIPv6, 0,
- "IPv6 address family", },
- { "broadcast", 'b', 0, &showBroadcast, 0,
- "Display calculated broadcast address", },
- { "hostname", 'h', 0, &showHostname, 0,
- "Show hostname determined via DNS" },
- { "netmask", 'm', 0, &showNetmask, 0,
- "Display default netmask for IP (class A, B, or C)" },
- { "network", 'n', 0, &showNetwork, 0,
- "Display network address", },
- { "prefix", 'p', 0, &showPrefix, 0,
- "Display network prefix", },
- { "silent", 's', 0, &beSilent, 0,
- "Don't ever display error messages" },
- POPT_AUTOHELP
- { NULL, '\0', 0, 0, 0, NULL, NULL }
- };
-
- optCon = poptGetContext("ipcalc", argc, argv, optionsTable, 0);
- poptReadDefaultConfig(optCon, 1);
-
- if ((rc = poptGetNextOpt(optCon)) < -1) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: bad argument %s: %s\n",
- poptBadOption(optCon, POPT_BADOPTION_NOALIAS),
- poptStrerror(rc));
- poptPrintHelp(optCon, stderr, 0);
- }
- return 1;
- }
-
- if (!(ipStr = (char *) poptGetArg(optCon))) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: ip address expected\n");
- poptPrintHelp(optCon, stderr, 0);
- }
- return 1;
- }
-
- /* if there is a : in the address, it is an IPv6 address */
- if (strchr(ipStr,':') != NULL) {
- familyIPv6=1;
- }
-
- if (strchr(ipStr,'/') != NULL) {
- prefixStr = strchr(ipStr, '/') + 1;
- prefixStr--;
- *prefixStr = '\0'; /* fix up ipStr */
- prefixStr++;
- } else {
- prefixStr = NULL;
- }
-
- if (prefixStr != NULL) {
- int r = 0;
- r = safe_atoi(prefixStr, &prefix);
- if (r != 0 || prefix < 0 || ((familyIPv6 && prefix > 128) || (!familyIPv6 && prefix > 32))) {
- if (!beSilent)
- fprintf(stderr, "ipcalc: bad prefix: %s\n", prefixStr);
- return 1;
- }
- }
-
- if (showBroadcast || showNetwork || showPrefix || doCheck) {
- if (!(netmaskStr = (char *) poptGetArg(optCon)) && (prefix < 0 && !doCheck)) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: netmask or prefix expected\n");
- poptPrintHelp(optCon, stderr, 0);
- }
- return 1;
- } else if (netmaskStr && prefix >= 0) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: both netmask and prefix specified\n");
- poptPrintHelp(optCon, stderr, 0);
- }
- return 1;
- } else if (netmaskStr) {
- if (inet_pton(AF_INET, netmaskStr, &netmask) <= 0) {
- if (!beSilent)
- fprintf(stderr, "ipcalc: bad netmask: %s\n", netmaskStr);
- return 1;
- }
- prefix = mask2prefix(netmask);
- }
- }
-
- if ((chptr = (char *) poptGetArg(optCon))) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: unexpected argument: %s\n", chptr);
- poptPrintHelp(optCon, stderr, 0);
- }
- return 1;
- }
-
- if (!familyIPv4 && !familyIPv6)
- familyIPv4 = 1;
-
- if (familyIPv4 && familyIPv6) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: cannot specify both address families\n");
- }
- return 1;
- }
-
- /* Handle CIDR entries such as 172/8 */
- if (prefix >= 0 && familyIPv4) {
- char *tmp = ipStr;
- int i;
-
- for (i=3; i> 0; i--) {
- tmp = strchr(tmp,'.');
- if (!tmp)
- break;
- else
- tmp++;
- }
-
- tmp = NULL;
- for (; i>0; i--) {
- if (asprintf(&tmp, "%s.0", ipStr) == -1) {
- fprintf(stderr, "Memory allocation failure line %d\n", __LINE__);
- abort();
- }
- ipStr = tmp;
- }
- }
-
- if (familyIPv4) {
- if (inet_pton(AF_INET, ipStr, &ip) <= 0) {
- if (!beSilent)
- fprintf(stderr, "ipcalc: bad IPv4 address: %s\n", ipStr);
- return 1;
- } else if (prefix > 32) {
- if (!beSilent)
- fprintf(stderr, "ipcalc: bad IPv4 prefix %d\n", prefix);
- return 1;
- } else {
- if (doCheck)
- return 0;
- }
- }
-
- if (familyIPv6) {
- if (inet_pton(AF_INET6, ipStr, &ip6) <= 0) {
- if (!beSilent)
- fprintf(stderr, "ipcalc: bad IPv6 address: %s\n", ipStr);
- return 1;
- } else if (prefix > 128) {
- if (!beSilent)
- fprintf(stderr, "ipcalc: bad IPv6 prefix %d\n", prefix);
- return 1;
- } else {
- if (doCheck)
- return 0;
- }
- }
-
- if (familyIPv6 &&
- (showBroadcast || showNetmask || showNetwork || showPrefix)) {
- if (!beSilent) {
- fprintf(stderr, "ipcalc: unable to show setting for IPv6\n");
- }
- return 1;
- }
-
- if (familyIPv4 &&
- !(showNetmask|showPrefix|showBroadcast|showNetwork|showHostname)) {
- poptPrintHelp(optCon, stderr, 0);
- return 1;
- }
-
- poptFreeContext(optCon);
-
- /* we know what we want to display now, so display it. */
-
- if (showNetmask) {
- if (prefix >= 0) {
- netmask = prefix2mask(prefix);
- } else {
- netmask = default_netmask(ip);
- prefix = mask2prefix(netmask);
- }
-
- memset(&namebuf, '\0', sizeof(namebuf));
-
- if (inet_ntop(AF_INET, &netmask, namebuf, INET_ADDRSTRLEN) == NULL) {
- fprintf(stderr, "Memory allocation failure line %d\n", __LINE__);
- abort();
- }
-
- printf("NETMASK=%s\n", namebuf);
- }
-
- if (showPrefix) {
- if (prefix == -1)
- prefix = mask2prefix(ip);
- printf("PREFIX=%d\n", prefix);
- }
-
- if (showBroadcast) {
- broadcast = calc_broadcast(ip, prefix);
- memset(&namebuf, '\0', sizeof(namebuf));
-
- if (inet_ntop(AF_INET, &broadcast, namebuf, INET_ADDRSTRLEN) == NULL) {
- fprintf(stderr, "Memory allocation failure line %d\n", __LINE__);
- abort();
- }
-
- printf("BROADCAST=%s\n", namebuf);
- }
-
- if (showNetwork) {
- network = calc_network(ip, prefix);
- memset(&namebuf, '\0', sizeof(namebuf));
-
- if (inet_ntop(AF_INET, &network, namebuf, INET_ADDRSTRLEN) == NULL) {
- fprintf(stderr, "Memory allocation failure line %d\n", __LINE__);
- abort();
- }
-
- printf("NETWORK=%s\n", namebuf);
- }
-
- if (showHostname) {
- if (familyIPv4) {
- hostName = get_hostname(AF_INET, &ip);
- } else if (familyIPv6) {
- hostName = get_hostname(AF_INET6, &ip6);
- }
-
- if (hostName == NULL) {
- if (!beSilent) {
- sprintf(errBuf, "ipcalc: cannot find hostname for %s", ipStr);
- herror(errBuf);
- }
- return 1;
- }
-
- printf("HOSTNAME=%s\n", hostName);
- }
-
- return 0;
-}
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