int
libcfs_ipif_enumerate (char ***namesp)
{
/* Allocate and fill in 'names', returning # interfaces/error */
char **names;
int toobig;
int nalloc;
int nfound;
struct socket *so;
struct ifreq *ifr;
struct ifconf ifc;
int rc;
int nob;
int i;
CFS_DECL_FUNNEL_DATA;
CFS_NET_IN;
rc = socreate(PF_INET, &so, SOCK_STREAM, 0);
CFS_NET_EX;
if (rc != 0) {
CERROR ("Can't create socket: %d\n", rc);
return (-rc);
}
nalloc = 16; /* first guess at max interfaces */
toobig = 0;
for (;;) {
if (nalloc * sizeof(*ifr) > CFS_PAGE_SIZE) {
toobig = 1;
nalloc = CFS_PAGE_SIZE/sizeof(*ifr);
CWARN("Too many interfaces: only enumerating first %d\n",
nalloc);
}
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);
CFS_NET_IN;
rc = -ifioctl(so, SIOCGIFCONF, (caddr_t)&ifc, current_proc());
CFS_NET_EX;
if (rc < 0) {
CERROR ("Error %d enumerating interfaces\n", rc);
goto out1;
}
nfound = ifc.ifc_len/sizeof(*ifr);
LASSERT (nfound <= nalloc);
if (nfound < nalloc || toobig)
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 = strnlen (ifr[i].ifr_name, IFNAMSIZ);
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:
CFS_NET_IN;
soclose(so);
CFS_NET_EX;
return rc;
}
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_enumerate (char ***namesp)
{
/* Allocate and fill in 'names', returning # interfaces/error */
char **names;
int toobig;
int nalloc;
int nfound;
socket_t so;
struct ifreq *ifr;
struct ifconf ifc;
int rc;
int nob;
int i;
rc = -sock_socket(PF_INET, SOCK_STREAM, 0,
NULL, NULL, &so);
if (rc != 0) {
CERROR ("Can't create socket: %d\n", rc);
return (rc);
}
nalloc = 16; /* first guess at max interfaces */
toobig = 0;
for (;;) {
if (nalloc * sizeof(*ifr) > CFS_PAGE_SIZE) {
toobig = 1;
nalloc = CFS_PAGE_SIZE/sizeof(*ifr);
CWARN("Too many interfaces: only enumerating first %d\n",
nalloc);
}
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);
#if 1
/*
* XXX Liang:
* sock_ioctl(..., SIOCGIFCONF, ...) is not supposed to be used in
* kernel space because it always try to copy result to userspace.
* So we can't get interfaces name by sock_ioctl(...,SIOCGIFCONF,...).
* I've created a bug for Apple, let's wait...
*/
nfound = 0;
for (i = 0; i < 16; i++) {
struct ifreq en;
bzero(&en, sizeof(en));
snprintf(en.ifr_name, IFNAMSIZ, "en%d", i);
rc = -sock_ioctl (so, SIOCGIFFLAGS, &en);
if (rc != 0)
continue;
strcpy(ifr[nfound++].ifr_name, en.ifr_name);
}
#else /* NOT in using now */
rc = -sock_ioctl(so, SIOCGIFCONF, (caddr_t)&ifc);
if (rc < 0) {
CERROR ("Error %d enumerating interfaces\n", rc);
goto out1;
}
nfound = ifc.ifc_len/sizeof(*ifr);
LASSERT (nfound <= nalloc);
#endif
if (nfound < nalloc || toobig)
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 = strnlen (ifr[i].ifr_name, IFNAMSIZ);
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:
sock_close(so);
return rc;
}
