int br_read_fdb(const char *bridge, struct fdb_entry *fdbs,
unsigned long offset, int num)
{
int i, fd = -1, n;
struct __fdb_entry fe[num];
#ifdef HAVE_LIBSYSFS
struct sysfs_class_device *dev;
/* open /sys/class/net/brXXX/brforward */
if (br_class_net &&
(dev = sysfs_get_class_device(br_class_net, (char *) bridge))) {
char path[SYSFS_PATH_MAX];
snprintf(path, SYSFS_PATH_MAX, "%s/%s", dev->path,
SYSFS_BRIDGE_FDB);
fd = open(path, O_RDONLY, 0);
}
if (fd != -1) {
/* read records from file */
lseek(fd, offset*sizeof(struct __fdb_entry), SEEK_SET);
n = read(fd, fe, num*sizeof(struct __fdb_entry));
if (n > 0)
n /= sizeof(struct __fdb_entry);
} else
#endif
{
/* old kernel, use ioctl */
unsigned long args[4] = { BRCTL_GET_FDB_ENTRIES,
(unsigned long) fe,
num, offset };
struct ifreq ifr;
int retries = 0;
strncpy(ifr.ifr_name, bridge, IFNAMSIZ);
ifr.ifr_data = (char *) args;
retry:
n = ioctl(br_socket_fd, SIOCDEVPRIVATE, &ifr);
/* table can change during ioctl processing */
if (n < 0 && errno == EAGAIN && ++retries < 10) {
sleep(0);
goto retry;
}
}
for (i = 0; i < n; i++)
__copy_fdb(fdbs+i, fe+i);
if (fd > 0)
close(fd);
return n;
}
int br_read_fdb(struct bridge *br, struct fdb_entry *fdbs, int offset, int num)
{
struct __fdb_entry f[num];
int i;
int numread;
if ((numread = br_device_ioctl(br, BRCTL_GET_FDB_ENTRIES,
(unsigned long)f, num, offset)) < 0)
return errno;
for (i=0;i<numread;i++)
__copy_fdb(fdbs+i, f+i);
return numread;
}
int br_read_fdb(const char *bridge, struct fdb_entry *fdbs,
unsigned long offset, int num)
{
FILE *f;
int i, n;
struct __fdb_entry fe[num];
char path[SYSFS_PATH_MAX];
/* open /sys/class/net/brXXX/brforward */
snprintf(path, SYSFS_PATH_MAX, SYSFS_CLASS_NET "%s/brforward", bridge);
f = fopen(path, "r");
if (f) {
fseek(f, offset*sizeof(struct __fdb_entry), SEEK_SET);
n = fread(fe, sizeof(struct __fdb_entry), num, f);
fclose(f);
} else {
/* old kernel, use ioctl */
unsigned long args[4] = { BRCTL_GET_FDB_ENTRIES,
(unsigned long) fe,
num, offset };
struct ifreq ifr;
int retries = 0;
strncpy(ifr.ifr_name, bridge, IFNAMSIZ);
ifr.ifr_data = (char *) args;
retry:
n = ioctl(br_socket_fd, SIOCDEVPRIVATE, &ifr);
/* table can change during ioctl processing */
if (n < 0 && errno == EAGAIN && ++retries < 10) {
sleep(0);
goto retry;
}
}
for (i = 0; i < n; i++)
__copy_fdb(fdbs+i, fe+i);
return n;
}
int br_read_fdb(struct bridge *br, struct fdb_entry *fdbs, int offset, int num)
{
struct __fdb_entry f[num];
int i;
int numread;
again:
numread = br_device_ioctl(br, BRCTL_GET_FDB_ENTRIES,
(unsigned long)f, num, offset);
if (numread < 0) {
if (errno == EAGAIN)
goto again;
return -errno;
}
for (i=0;i<numread;i++)
__copy_fdb(fdbs+i, f+i);
return numread;
}
