diff options
Diffstat (limited to 'plugins/sudoers/interfaces.c')
| -rw-r--r-- | plugins/sudoers/interfaces.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/plugins/sudoers/interfaces.c b/plugins/sudoers/interfaces.c new file mode 100644 index 0000000..b60f2a6 --- /dev/null +++ b/plugins/sudoers/interfaces.c @@ -0,0 +1,134 @@ +/* + * 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" + +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; +} |