1 files changed, 240 insertions, 0 deletions
diff --git a/usr.bin/sudo/interfaces.c b/usr.bin/sudo/interfaces.c
new file mode 100644
index 00000000000..eee9d1fe9cc
--- /dev/null
+++ b/usr.bin/sudo/interfaces.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 1996, 1998, 1999 Todd C. Miller <Todd.Miller@courtesan.com>
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 4. Products derived from this software may not be called "Sudo" nor
+ *    may "Sudo" appear in their names without specific prior written
+ *    permission from the author.
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
+ */
+
+/*
+ * Supress a warning w/ gcc on Digital UN*X.
+ * The system headers should really do this....
+ */
+#if defined(__osf__) && !defined(__cplusplus)
+struct mbuf;
+struct rtentry;
+#endif
+
+#include "config.h"
+
+#include <stdio.h>
+#ifdef STDC_HEADERS
+#include <stdlib.h>
+#endif /* STDC_HEADERS */
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <netdb.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#if defined(HAVE_SYS_SOCKIO_H) && !defined(SIOCGIFCONF)
+#include <sys/sockio.h>
+#endif
+#ifdef _ISC
+#include <sys/stream.h>
+#include <sys/sioctl.h>
+#include <sys/stropts.h>
+#include <net/errno.h>
+#define STRSET(cmd, param, len)	{strioctl.ic_cmd=(cmd);\
+				 strioctl.ic_dp=(param);\
+				 strioctl.ic_timout=0;\
+				 strioctl.ic_len=(len);}
+#endif /* _ISC */
+#ifdef _MIPS
+#include <net/soioctl.h>
+#endif /* _MIPS */
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+
+#include "sudo.h"
+#include "interfaces.h"
+
+#ifndef lint
+static const char rcsid[] = "$Sudo: interfaces.c,v 1.59 1999/08/12 16:24:09 millert Exp $";
+#endif /* lint */
+
+
+#if defined(SIOCGIFCONF) && !defined(STUB_LOAD_INTERFACES)
+/*
+ * Allocate and fill in the interfaces global variable with the
+ * machine's ip addresses and netmasks.
+ */
+void
+load_interfaces()
+{
+    struct ifconf *ifconf;
+    struct ifreq *ifr, ifr_tmp;
+    struct sockaddr_in *sin;
+    int sock, n, i;
+    size_t len = sizeof(struct ifconf) + BUFSIZ;
+    char *previfname = "", *ifconf_buf = NULL;
+#ifdef _ISC
+    struct strioctl strioctl;
+#endif /* _ISC */
+
+    sock = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sock < 0) {
+	(void) fprintf(stderr, "%s: cannot open socket: %s\n",
+	    Argv[0], strerror(errno));
+	exit(1);
+    }
+
+    /*
+     * Get interface configuration or return (leaving num_interfaces 0)
+     */
+    for (;;) {
+	ifconf_buf = erealloc(ifconf_buf, len);
+	ifconf = (struct ifconf *) ifconf_buf;
+	ifconf->ifc_len = len - sizeof(struct ifconf);
+	ifconf->ifc_buf = (caddr_t) (ifconf_buf + sizeof(struct ifconf));
+
+	/* Networking may not be installed in kernel... */
+#ifdef _ISC
+	STRSET(SIOCGIFCONF, (caddr_t) ifconf, len);
+	if (ioctl(sock, I_STR, (caddr_t) &strioctl) < 0) {
+#else
+	if (ioctl(sock, SIOCGIFCONF, (caddr_t) ifconf) < 0) {
+#endif /* _ISC */
+	    free(ifconf_buf);
+	    (void) close(sock);
+	    return;
+	}
+
+	/* Break out of loop if we have a big enough buffer. */
+	if (ifconf->ifc_len + sizeof(struct ifreq) < len)
+	    break;
+	len += BUFSIZ;
+    }
+
+    /* Allocate space for the maximum number of interfaces that could exist. */
+    n = ifconf->ifc_len / sizeof(struct ifreq);
+    interfaces = (struct interface *) emalloc(sizeof(struct interface) * n);
+
+    /* For each interface, store the ip address and netmask. */
+    for (i = 0; i < ifconf->ifc_len; ) {
+	/* Get a pointer to the current interface. */
+	ifr = (struct ifreq *) &ifconf->ifc_buf[i];
+
+	/* Set i to the subscript of the next interface. */
+	i += sizeof(struct ifreq);
+#ifdef HAVE_SA_LEN
+	if (ifr->ifr_addr.sa_len > sizeof(ifr->ifr_addr))
+	    i += ifr->ifr_addr.sa_len - sizeof(struct sockaddr);
+#endif /* HAVE_SA_LEN */
+
+	/* Skip duplicates and interfaces with NULL addresses. */
+	sin = (struct sockaddr_in *) &ifr->ifr_addr;
+	if (sin->sin_addr.s_addr == 0 ||
+	    strncmp(previfname, ifr->ifr_name, sizeof(ifr->ifr_name) - 1) == 0)
+	    continue;
+
+	if (ifr->ifr_addr.sa_family != AF_INET)
+		continue;
+
+#ifdef SIOCGIFFLAGS
+	memset(&ifr_tmp, 0, sizeof(ifr_tmp));
+	strncpy(ifr_tmp.ifr_name, ifr->ifr_name, sizeof(ifr_tmp.ifr_name) - 1);
+	if (ioctl(sock, SIOCGIFFLAGS, (caddr_t) &ifr_tmp) < 0)
+#endif
+	    ifr_tmp = *ifr;
+	
+	/* Skip interfaces marked "down" and "loopback". */
+	if (!(ifr_tmp.ifr_flags & IFF_UP) || (ifr_tmp.ifr_flags & IFF_LOOPBACK))
+		continue;
+
+	sin = (struct sockaddr_in *) &ifr->ifr_addr;
+	interfaces[num_interfaces].addr.s_addr = sin->sin_addr.s_addr;
+
+	/* Stash the name of the interface we saved. */
+	previfname = ifr->ifr_name;
+
+	/* Get the netmask. */
+	(void) memset(&ifr_tmp, 0, sizeof(ifr_tmp));
+	strncpy(ifr_tmp.ifr_name, ifr->ifr_name, sizeof(ifr_tmp.ifr_name) - 1);
+#ifdef SIOCGIFNETMASK
+#ifdef _ISC
+	STRSET(SIOCGIFNETMASK, (caddr_t) &ifr_tmp, sizeof(ifr_tmp));
+	if (ioctl(sock, I_STR, (caddr_t) &strioctl) == 0) {
+#else
+	if (ioctl(sock, SIOCGIFNETMASK, (caddr_t) &ifr_tmp) == 0) {
+#endif /* _ISC */
+	    sin = (struct sockaddr_in *) &ifr_tmp.ifr_addr;
+
+	    interfaces[num_interfaces].netmask.s_addr = sin->sin_addr.s_addr;
+	} else {
+#else
+	{
+#endif /* SIOCGIFNETMASK */
+	    if (IN_CLASSC(interfaces[num_interfaces].addr.s_addr))
+		interfaces[num_interfaces].netmask.s_addr = htonl(IN_CLASSC_NET);
+	    else if (IN_CLASSB(interfaces[num_interfaces].addr.s_addr))
+		interfaces[num_interfaces].netmask.s_addr = htonl(IN_CLASSB_NET);
+	    else
+		interfaces[num_interfaces].netmask.s_addr = htonl(IN_CLASSA_NET);
+	}
+
+	/* Only now can we be sure it was a good/interesting interface. */
+	num_interfaces++;
+    }
+
+    /* If the expected size < real size, realloc the array. */
+    if (n != num_interfaces) {
+	if (num_interfaces != 0)
+	    interfaces = (struct interface *) erealloc(interfaces,
+		sizeof(struct interface) * num_interfaces);
+	else
+	    free(interfaces);
+    }
+    free(ifconf_buf);
+    (void) close(sock);
+}
+
+#else /* !SIOCGIFCONF || STUB_LOAD_INTERFACES */
+
+/*
+ * Stub function for those without SIOCGIFCONF
+ */
+void
+load_interfaces()
+{
+    return;
+}
+
+#endif /* SIOCGIFCONF && !STUB_LOAD_INTERFACES */