/* get ia6_flags for link-local addr on if. returns -1 on error. */
static int
get_llflag(const char *name)
{
#ifdef HAVE_GETIFADDRS
struct ifaddrs *ifap, *ifa;
struct in6_ifreq ifr6;
struct sockaddr_in6 *sin6;
int s;
if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
warnmsg(LOG_ERR, __func__, "socket(SOCK_DGRAM): %s",
strerror(errno));
exit(1);
}
if (getifaddrs(&ifap) != 0) {
warnmsg(LOG_ERR, __func__, "etifaddrs: %s",
strerror(errno));
exit(1);
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (strlen(ifa->ifa_name) != strlen(name)
|| strncmp(ifa->ifa_name, name, strlen(name)) != 0)
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
continue;
memset(&ifr6, 0, sizeof(ifr6));
strcpy(ifr6.ifr_name, name);
memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
warnmsg(LOG_ERR, __func__,
"ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
exit(1);
}
freeifaddrs(ifap);
close(s);
return ifr6.ifr_ifru.ifru_flags6;
}
freeifaddrs(ifap);
close(s);
return -1;
#else
int s;
unsigned int maxif;
struct ifreq *iflist;
struct ifconf ifconf;
struct ifreq *ifr, *ifr_end;
struct sockaddr_in6 *sin6;
struct in6_ifreq ifr6;
maxif = if_maxindex() + 1;
iflist = (struct ifreq *)malloc(maxif * BUFSIZ); /* XXX */
if (iflist == NULL) {
warnmsg(LOG_ERR, __func__, "not enough core");
exit(1);
}
if ((s = socket(PF_INET6, SOCK_DGRAM, 0)) < 0) {
warnmsg(LOG_ERR, __func__, "socket(SOCK_DGRAM): %s",
strerror(errno));
exit(1);
}
memset(&ifconf, 0, sizeof(ifconf));
ifconf.ifc_req = iflist;
ifconf.ifc_len = maxif * BUFSIZ; /* XXX */
if (ioctl(s, SIOCGIFCONF, &ifconf) < 0) {
warnmsg(LOG_ERR, __func__, "ioctl(SIOCGIFCONF): %s",
strerror(errno));
exit(1);
}
/* Look for this interface in the list */
ifr_end = (struct ifreq *) (ifconf.ifc_buf + ifconf.ifc_len);
for (ifr = ifconf.ifc_req;
ifr < ifr_end;
ifr = (struct ifreq *) ((char *) &ifr->ifr_addr
+ ifr->ifr_addr.sa_len)) {
if (strlen(ifr->ifr_name) != strlen(name)
|| strncmp(ifr->ifr_name, name, strlen(name)) != 0)
continue;
if (ifr->ifr_addr.sa_family != AF_INET6)
continue;
sin6 = (struct sockaddr_in6 *)&ifr->ifr_addr;
if (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
continue;
memset(&ifr6, 0, sizeof(ifr6));
strcpy(ifr6.ifr_name, name);
memcpy(&ifr6.ifr_ifru.ifru_addr, sin6, sin6->sin6_len);
if (ioctl(s, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
warnmsg(LOG_ERR, __func__,
"ioctl(SIOCGIFAFLAG_IN6): %s", strerror(errno));
exit(1);
}
free(iflist);
close(s);
return ifr6.ifr_ifru.ifru_flags6;
}
free(iflist);
close(s);
return -1;
#endif
}
/*
* Return the interface list
*/
int
ifaddrlist(register struct ifaddrlist **ipaddrp, register char *errbuf, size_t l)
{
#ifdef HAVE_GETIFADDRS
struct ifaddrs *ifap, *ifa;
int nipaddr;
struct ifaddrlist *al;
struct ifaddrlist *ifaddrlist;
unsigned int maxif;
struct sockaddr_in *sin;
#if 1
maxif = if_maxindex() * 3; /* 3 is a magic number... */
#else
maxif = 64;
#endif
ifaddrlist = (struct ifaddrlist *)malloc(maxif *
sizeof(struct ifaddrlist));
if (ifaddrlist == NULL)
return -1;
if (getifaddrs(&ifap) != 0)
return -1;
al = ifaddrlist;
nipaddr = 0;
for (ifa = ifap; ifa && nipaddr < maxif; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_INET)
continue;
if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr ==
htonl(INADDR_ANY))
continue;
if ((ifa->ifa_flags & IFF_UP) == 0)
continue;
#ifdef IFF_LOOPBACK
if ((ifa->ifa_flags & IFF_LOOPBACK) != 0)
continue;
#else
if (strcmp(ifa->ifa_name, "lo0") == 0)
continue;
#endif
sin = (struct sockaddr_in *)ifa->ifa_addr;
al->addr = sin->sin_addr.s_addr;
al->device = strdup(ifa->ifa_name);
++al;
++nipaddr;
}
*ipaddrp = ifaddrlist;
#ifdef HAVE_FREEIFADDRS
freeifaddrs(ifap);
#else
free(ifap);
#endif
return nipaddr;
#else
register int fd, nipaddr;
#ifdef HAVE_SOCKADDR_SA_LEN
register int n;
#endif
register struct ifreq *ifrp, *ifend, *ifnext, *mp;
register struct sockaddr_in *sin;
register struct ifaddrlist *al;
struct ifconf ifc;
struct ifreq *ibuf, ifr;
char device[sizeof(ifr.ifr_name) + 1];
struct ifaddrlist *ifaddrlist;
unsigned int maxif;
#if 1
maxif = if_maxindex() * 3; /* 3 is a magic number... */
#else
maxif = 64;
#endif
ifaddrlist = (struct ifaddrlist *)malloc(maxif *
sizeof(struct ifaddrlist));
if (ifaddrlist == NULL)
return -1;
ibuf = (struct ifreq *)malloc(maxif * sizeof(struct ifreq));
if (ibuf == NULL) {
free(ifaddrlist);
return -1;
}
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
(void)snprintf(errbuf, l, "socket: %s", strerror(errno));
free(ifaddrlist);
free(ibuf);
return (-1);
}
ifc.ifc_len = maxif * sizeof(struct ifreq);
ifc.ifc_buf = (caddr_t)ibuf;
if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 ||
ifc.ifc_len < sizeof(struct ifreq)) {
(void)snprintf(errbuf, l, "SIOCGIFCONF: %s", strerror(errno));
(void)close(fd);
free(ifaddrlist);
free(ibuf);
return (-1);
}
ifrp = ibuf;
ifend = (struct ifreq *)((char *)ibuf + ifc.ifc_len);
al = ifaddrlist;
mp = NULL;
nipaddr = 0;
for (; ifrp < ifend; ifrp = ifnext) {
#ifdef HAVE_SOCKADDR_SA_LEN
n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
if (n < sizeof(*ifrp))
ifnext = ifrp + 1;
else
ifnext = (struct ifreq *)((char *)ifrp + n);
if (ifrp->ifr_addr.sa_family != AF_INET)
continue;
#else
ifnext = ifrp + 1;
#endif
if (((struct sockaddr_in *)&ifrp->ifr_addr)->sin_addr.s_addr ==
htonl(INADDR_ANY))
continue;
/*
* Need a template to preserve address info that is
* used below to locate the next entry. (Otherwise,
* SIOCGIFFLAGS stomps over it because the requests
* are returned in a union.)
*/
strncpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifrp->ifr_name));
if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
if (errno == ENXIO)
continue;
(void)snprintf(errbuf, l, "SIOCGIFFLAGS: %.*s: %s",
(int)sizeof(ifr.ifr_name), ifr.ifr_name,
strerror(errno));
(void)close(fd);
free(ifaddrlist);
free(ibuf);
return (-1);
}
/* Must be up and not the loopback */
if ((ifr.ifr_flags & IFF_UP) == 0 || ISLOOPBACK(&ifr))
continue;
(void)strncpy(device, ifr.ifr_name, sizeof(ifr.ifr_name));
device[sizeof(device) - 1] = '\0';
if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
(void)snprintf(errbuf, l, "SIOCGIFADDR: %s: %s",
device, strerror(errno));
(void)close(fd);
free(ifaddrlist);
free(ibuf);
return (-1);
}
sin = (struct sockaddr_in *)&ifr.ifr_addr;
al->addr = sin->sin_addr.s_addr;
al->device = strdup(device);
++al;
++nipaddr;
}
(void)close(fd);
*ipaddrp = ifaddrlist;
free(ibuf);
return (nipaddr);
#endif
}
