int
libcfs_ipif_query (char *name, int *up, __u32 *ip)
{
struct ifreq ifr;
int nob;
int rc;
__u32 val;
nob = strlen(name);
if (nob >= IFNAMSIZ) {
CERROR("Interface name %s too long\n", name);
return -EINVAL;
}
CLASSERT (sizeof(ifr.ifr_name) >= IFNAMSIZ);
strcpy(ifr.ifr_name, name);
rc = libcfs_sock_ioctl(SIOCGIFFLAGS, (unsigned long)&ifr);
if (rc != 0) {
CERROR("Can't get flags for interface %s\n", name);
return rc;
}
if ((ifr.ifr_flags & IFF_UP) == 0) {
CDEBUG(D_NET, "Interface %s down\n", name);
*up = 0;
*ip = 0;
return 0;
}
*up = 1;
strcpy(ifr.ifr_name, name);
ifr.ifr_addr.sa_family = AF_INET;
rc = libcfs_sock_ioctl(SIOCGIFADDR, (unsigned long)&ifr);
if (rc != 0) {
CERROR("Can't get IP address for interface %s\n", name);
return rc;
}
val = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
*ip = ntohl(val);
return 0;
}
int
libcfs_ipif_enumerate (char ***namesp)
{
/* Allocate and fill in 'names', returning # interfaces/error */
char **names;
int nalloc;
int nfound;
struct ifreq *ifr;
struct ifconf ifc;
int rc;
int nob;
int i;
nalloc = 16; /* first guess at max interfaces */
for (;;) {
LIBCFS_ALLOC(ifr, nalloc * sizeof(*ifr));
if (ifr == NULL) {
CERROR ("ENOMEM enumerating up to %d interfaces\n",
nalloc);
rc = -ENOMEM;
goto out0;
}
ifc.ifc_buf = (char *)ifr;
ifc.ifc_len = nalloc * sizeof(*ifr);
rc = libcfs_sock_ioctl(SIOCGIFCONF, (unsigned long)&ifc);
if (rc < 0) {
CERROR ("Error %d enumerating interfaces\n", rc);
goto out1;
}
LASSERT (rc == 0);
nfound = ifc.ifc_len/sizeof(*ifr);
LASSERT (nfound <= nalloc);
if (nfound < nalloc)
break;
LIBCFS_FREE(ifr, nalloc * sizeof(*ifr));
nalloc *= 2;
}
if (nfound == 0)
goto out1;
LIBCFS_ALLOC(names, nfound * sizeof(*names));
if (names == NULL) {
rc = -ENOMEM;
goto out1;
}
/* NULL out all names[i] */
memset (names, 0, nfound * sizeof(*names));
for (i = 0; i < nfound; i++) {
nob = strlen (ifr[i].ifr_name);
if (nob >= IFNAMSIZ) {
/* no space for terminating NULL */
CERROR("interface name %.*s too long (%d max)\n",
nob, ifr[i].ifr_name, IFNAMSIZ);
rc = -ENAMETOOLONG;
goto out2;
}
LIBCFS_ALLOC(names[i], IFNAMSIZ);
if (names[i] == NULL) {
rc = -ENOMEM;
goto out2;
}
memcpy(names[i], ifr[i].ifr_name, nob);
names[i][nob] = 0;
}
*namesp = names;
rc = nfound;
out2:
if (rc < 0)
libcfs_ipif_free_enumeration(names, nfound);
out1:
LIBCFS_FREE(ifr, nalloc * sizeof(*ifr));
out0:
return rc;
}
int
libcfs_ipif_query (char *name, int *up, __u32 *ip)
{
struct ifreq ifr;
int nob;
int rc;
__u32 val;
#ifdef __FreeBSD__
char *idx;
#endif
nob = strlen(name);
if (nob >= IFNAMSIZ) {
CERROR("Interface name %s too long\n", name);
return -EINVAL;
}
#ifdef __FreeBSD__
idx = strchr(name, ':');
if (idx)
*idx++ = '\0';
#endif
CLASSERT (sizeof(ifr.ifr_name) >= IFNAMSIZ);
strcpy(ifr.ifr_name, name);
rc = libcfs_sock_ioctl(SIOCGIFFLAGS, &ifr);
if (rc != 0) {
CERROR("Can't get flags for interface %s: %s\n", name,
strerror(errno));
return rc;
}
if ((ifr.ifr_flags & IFF_UP) == 0) {
CDEBUG(D_NET, "Interface %s down\n", name);
*up = 0;
*ip = 0;
return 0;
}
*up = 1;
#ifdef __FreeBSD__
if (idx) {
struct ifaddrs *ifa0, *ifa;
char *endp;
int nidx;
nidx = strtol(idx, &endp, 10);
if (nidx < 0 || nidx >= INT_MAX ||
endp == idx || *endp)
abort();
rc = -1;
errno = EADDRNOTAVAIL;
getifaddrs(&ifa0);
for (ifa = ifa0; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family == AF_INET &&
strcmp(ifa->ifa_name, name) == 0 &&
!nidx--) {
rc = 0;
memcpy(&ifr.ifr_addr, ifa->ifa_addr,
ifa->ifa_addr->sa_len);
break;
}
}
freeifaddrs(ifa);
} else {
#endif
strcpy(ifr.ifr_name, name);
ifr.ifr_addr.sa_family = AF_INET;
rc = libcfs_sock_ioctl(SIOCGIFADDR, &ifr);
#ifdef __FreeBSD__
}
#endif
if (rc != 0) {
CERROR("Can't get IP address for interface %s\n", name);
return rc;
}
val = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
*ip = ntohl(val);
return 0;
}
