1 files changed, 138 insertions, 0 deletions
diff --git a/plugins/sudoers/interfaces.c b/plugins/sudoers/interfaces.c
new file mode 100644
index 0000000..c946fb1
--- /dev/null
+++ b/plugins/sudoers/interfaces.c
@@ -0,0 +1,138 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2010-2016 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netinet/in.h>  
+#include <arpa/inet.h>
+#ifdef NEED_RESOLV_H
+# include <arpa/nameser.h>
+# include <resolv.h>
+#endif /* NEED_RESOLV_H */
+#include <netdb.h>
+#include <errno.h>
+
+#include "sudoers.h"
+#include "interfaces.h"
+
+#ifndef INADDR_NONE
+# define INADDR_NONE ((unsigned int)-1)
+#endif
+
+static struct interface_list interfaces = SLIST_HEAD_INITIALIZER(interfaces);
+
+/*
+ * Parse a space-delimited list of IP address/netmask pairs and
+ * store in a list of interface structures.  Returns true on
+ * success and false on parse error or memory allocation error.
+ */
+bool
+set_interfaces(const char *ai)
+{
+    char *addrinfo, *addr, *mask, *last;
+    struct interface *ifp;
+    bool ret = false;
+    debug_decl(set_interfaces, SUDOERS_DEBUG_NETIF);
+
+    if ((addrinfo = strdup(ai)) == NULL)
+	debug_return_bool(false);
+    for (addr = strtok_r(addrinfo, " \t", &last); addr != NULL; addr = strtok_r(NULL, " \t", &last)) {
+	/* Separate addr and mask. */
+	if ((mask = strchr(addr, '/')) == NULL)
+	    continue;
+	*mask++ = '\0';
+
+	/* Parse addr and store in list. */
+	if ((ifp = calloc(1, sizeof(*ifp))) == NULL) {
+	    sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+	    goto done;
+	}
+	if (strchr(addr, ':')) {
+	    /* IPv6 */
+#ifdef HAVE_STRUCT_IN6_ADDR
+	    ifp->family = AF_INET6;
+	    if (inet_pton(AF_INET6, addr, &ifp->addr.ip6) != 1) {
+		sudo_warnx(U_("unable to parse IP address \"%s\""), addr);
+		free(ifp);
+		goto done;
+	    }
+	    if (inet_pton(AF_INET6, mask, &ifp->netmask.ip6) != 1) {
+		sudo_warnx(U_("unable to parse netmask \"%s\""), mask);
+		free(ifp);
+		goto done;
+	    }
+#else
+	    free(ifp);
+	    continue;
+#endif
+	} else {
+	    /* IPv4 */
+	    ifp->family = AF_INET;
+	    if (inet_pton(AF_INET, addr, &ifp->addr.ip4) != 1) {
+		sudo_warnx(U_("unable to parse IP address \"%s\""), addr);
+		free(ifp);
+		goto done;
+	    }
+	    if (inet_pton(AF_INET, mask, &ifp->netmask.ip4) != 1) {
+		sudo_warnx(U_("unable to parse netmask \"%s\""), mask);
+		free(ifp);
+		goto done;
+	    }
+	}
+	SLIST_INSERT_HEAD(&interfaces, ifp, entries);
+    }
+    ret = true;
+
+done:
+    free(addrinfo);
+    debug_return_bool(ret);
+}
+
+struct interface_list *
+get_interfaces(void)
+{
+    return &interfaces;
+}
+
+void
+dump_interfaces(const char *ai)
+{
+    const char *cp, *ep;
+    const char *ai_end = ai + strlen(ai);
+    debug_decl(set_interfaces, SUDOERS_DEBUG_NETIF);
+
+    sudo_printf(SUDO_CONV_INFO_MSG,
+	_("Local IP address and netmask pairs:\n"));
+    cp = sudo_strsplit(ai, ai_end, " \t", &ep);
+    while (cp != NULL) {
+	sudo_printf(SUDO_CONV_INFO_MSG, "\t%.*s\n", (int)(ep - cp), cp);
+	cp = sudo_strsplit(NULL, ai_end, " \t", &ep);
+    }
+
+    debug_return;
+}