#if defined(__osf__) && !defined(__cplusplus)
struct mbuf;
struct rtentry;
#endif
#include <config.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
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#ifdef HAVE_STRING_H
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
# include <memory.h>
# endif
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <netdb.h>
#include <errno.h>
#ifdef _ISC
# include <sys/stream.h>
# include <sys/sioctl.h>
# include <sys/stropts.h>
# define STRSET(cmd, param, len) {strioctl.ic_cmd=(cmd);\
strioctl.ic_dp=(param);\
strioctl.ic_timout=0;\
strioctl.ic_len=(len);}
#endif
#ifdef _MIPS
# include <net/soioctl.h>
#endif
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#ifdef HAVE_GETIFADDRS
# include <ifaddrs.h>
#endif
#include "sudo.h"
#include "interfaces.h"
#ifndef IFF_LOOPBACK
# define IFF_LOOPBACK 0
#endif
#ifdef HAVE_GETIFADDRS
void
load_interfaces()
{
struct ifaddrs *ifa, *ifaddrs;
struct sockaddr_in *sin;
#ifdef HAVE_IN6_ADDR
struct sockaddr_in6 *sin6;
#endif
int i;
if (getifaddrs(&ifaddrs))
return;
for (ifa = ifaddrs; ifa != NULL; ifa = ifa -> ifa_next) {
if (ifa->ifa_addr == NULL || !ISSET(ifa->ifa_flags, IFF_UP) ||
ISSET(ifa->ifa_flags, IFF_LOOPBACK))
continue;
switch(ifa->ifa_addr->sa_family) {
case AF_INET:
#ifdef HAVE_IN6_ADDR
case AF_INET6:
#endif
num_interfaces++;
break;
}
}
if (num_interfaces == 0)
return;
interfaces =
(struct interface *) emalloc2(num_interfaces, sizeof(struct interface));
for (ifa = ifaddrs, i = 0; ifa != NULL; ifa = ifa -> ifa_next) {
if (ifa->ifa_addr == NULL || !ISSET(ifa->ifa_flags, IFF_UP) ||
ISSET(ifa->ifa_flags, IFF_LOOPBACK))
continue;
switch(ifa->ifa_addr->sa_family) {
case AF_INET:
sin = (struct sockaddr_in *)ifa->ifa_addr;
if (sin == NULL)
continue;
memcpy(&interfaces[i].addr, &sin->sin_addr,
sizeof(struct in_addr));
sin = (struct sockaddr_in *)ifa->ifa_netmask;
if (sin == NULL)
continue;
memcpy(&interfaces[i].netmask, &sin->sin_addr,
sizeof(struct in_addr));
interfaces[i].family = AF_INET;
i++;
break;
#ifdef HAVE_IN6_ADDR
case AF_INET6:
sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
if (sin6 == NULL)
continue;
memcpy(&interfaces[i].addr, &sin6->sin6_addr,
sizeof(struct in6_addr));
sin6 = (struct sockaddr_in6 *)ifa->ifa_netmask;
if (sin6 == NULL)
continue;
memcpy(&interfaces[i].netmask, &sin6->sin6_addr,
sizeof(struct in6_addr));
interfaces[i].family = AF_INET6;
i++;
break;
#endif
}
}
#ifdef HAVE_FREEIFADDRS
freeifaddrs(ifaddrs);
#else
efree(ifaddrs);
#endif
}
#elif defined(SIOCGIFCONF) && !defined(STUB_LOAD_INTERFACES)
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
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0)
error(1, "cannot open socket");
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));
#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 && errno != EINVAL) {
#endif
efree(ifconf_buf);
(void) close(sock);
return;
}
if (ifconf->ifc_len + sizeof(struct ifreq) < len)
break;
len += BUFSIZ;
}
if ((n = ifconf->ifc_len / sizeof(struct ifreq)) == 0)
return;
interfaces = (struct interface *) emalloc2(n, sizeof(struct interface));
for (i = 0; i < ifconf->ifc_len; ) {
ifr = (struct ifreq *) &ifconf->ifc_buf[i];
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
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
zero_bytes(&ifr_tmp, 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;
if (!ISSET(ifr_tmp.ifr_flags, IFF_UP) ||
ISSET(ifr_tmp.ifr_flags, IFF_LOOPBACK))
continue;
sin = (struct sockaddr_in *) &ifr->ifr_addr;
interfaces[num_interfaces].addr.ip4.s_addr = sin->sin_addr.s_addr;
previfname = ifr->ifr_name;
zero_bytes(&ifr_tmp, 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
sin = (struct sockaddr_in *) &ifr_tmp.ifr_addr;
interfaces[num_interfaces].netmask.ip4.s_addr = sin->sin_addr.s_addr;
} else {
#else
{
#endif
if (IN_CLASSC(interfaces[num_interfaces].addr.ip4.s_addr))
interfaces[num_interfaces].netmask.ip4.s_addr = htonl(IN_CLASSC_NET);
else if (IN_CLASSB(interfaces[num_interfaces].addr.ip4.s_addr))
interfaces[num_interfaces].netmask.ip4.s_addr = htonl(IN_CLASSB_NET);
else
interfaces[num_interfaces].netmask.ip4.s_addr = htonl(IN_CLASSA_NET);
}
interfaces[num_interfaces].family = AF_INET;
num_interfaces++;
}
if (n != num_interfaces) {
if (num_interfaces != 0)
interfaces = (struct interface *) erealloc3(interfaces,
num_interfaces, sizeof(struct interface));
else
efree(interfaces);
}
efree(ifconf_buf);
(void) close(sock);
}
#else
void
load_interfaces()
{
return;
}
#endif
void
dump_interfaces()
{
int i;
#ifdef HAVE_IN6_ADDR
char addrbuf[INET6_ADDRSTRLEN], maskbuf[INET6_ADDRSTRLEN];
#endif
puts("Local IP address and netmask pairs:");
for (i = 0; i < num_interfaces; i++) {
switch(interfaces[i].family) {
case AF_INET:
printf("\t%s / ", inet_ntoa(interfaces[i].addr.ip4));
puts(inet_ntoa(interfaces[i].netmask.ip4));
break;
#ifdef HAVE_IN6_ADDR
case AF_INET6:
inet_ntop(AF_INET6, &interfaces[i].addr.ip6,
addrbuf, sizeof(addrbuf));
inet_ntop(AF_INET6, &interfaces[i].netmask.ip6,
maskbuf, sizeof(maskbuf));
printf("\t%s / %s\n", addrbuf, maskbuf);
break;
#endif
}
}
}