#include <config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef NEED_RESOLV_H
# include <arpa/nameser.h>
# include <resolv.h>
#endif
#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);
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)) {
if ((mask = strchr(addr, '/')) == NULL)
continue;
*mask++ = '\0';
if ((ifp = calloc(1, sizeof(*ifp))) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
if (strchr(addr, ':')) {
#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 {
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;
}