OpenWrt – Rev 4
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/*
* swlib.c: Switch configuration API (user space part)
*
* Copyright (C) 2008 Felix Fietkau <nbd@nbd.name>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <inttypes.h>
#include <errno.h>
#include <stdint.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <linux/switch.h>
#include "swlib.h"
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
//#define DEBUG 1
#ifdef DEBUG
#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
#else
#define DPRINTF(fmt, ...) do {} while (0)
#endif
static struct nl_sock *handle;
static struct nl_cache *cache;
static struct genl_family *family;
static struct nlattr *tb[SWITCH_ATTR_MAX + 1];
static int refcount = 0;
static struct nla_policy port_policy[SWITCH_ATTR_MAX] = {
[SWITCH_PORT_ID] = { .type = NLA_U32 },
[SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
};
static struct nla_policy portmap_policy[SWITCH_PORTMAP_MAX] = {
[SWITCH_PORTMAP_SEGMENT] = { .type = NLA_STRING },
[SWITCH_PORTMAP_VIRT] = { .type = NLA_U32 },
};
static struct nla_policy link_policy[SWITCH_LINK_ATTR_MAX] = {
[SWITCH_LINK_FLAG_LINK] = { .type = NLA_FLAG },
[SWITCH_LINK_FLAG_DUPLEX] = { .type = NLA_FLAG },
[SWITCH_LINK_FLAG_ANEG] = { .type = NLA_FLAG },
[SWITCH_LINK_SPEED] = { .type = NLA_U32 },
[SWITCH_LINK_FLAG_EEE_100BASET] = { .type = NLA_FLAG },
[SWITCH_LINK_FLAG_EEE_1000BASET] = { .type = NLA_FLAG },
};
static inline void *
swlib_alloc(size_t size)
{
void *ptr;
ptr = malloc(size);
if (!ptr)
goto done;
memset(ptr, 0, size);
done:
return ptr;
}
static int
wait_handler(struct nl_msg *msg, void *arg)
{
int *finished = arg;
*finished = 1;
return NL_STOP;
}
/* helper function for performing netlink requests */
static int
swlib_call(int cmd, int (*call)(struct nl_msg *, void *),
int (*data)(struct nl_msg *, void *), void *arg)
{
struct nl_msg *msg;
struct nl_cb *cb = NULL;
int finished;
int flags = 0;
int err;
msg = nlmsg_alloc();
if (!msg) {
fprintf(stderr, "Out of memory!\n");
exit(1);
}
if (!data)
flags |= NLM_F_DUMP;
genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, genl_family_get_id(family), 0, flags, cmd, 0);
if (data) {
if (data(msg, arg) < 0)
goto nla_put_failure;
}
cb = nl_cb_alloc(NL_CB_CUSTOM);
if (!cb) {
fprintf(stderr, "nl_cb_alloc failed.\n");
exit(1);
}
err = nl_send_auto_complete(handle, msg);
if (err < 0) {
fprintf(stderr, "nl_send_auto_complete failed: %d\n", err);
goto out;
}
finished = 0;
if (call)
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, call, arg);
if (data)
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished);
else
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished);
err = nl_recvmsgs(handle, cb);
if (err < 0) {
goto out;
}
if (!finished)
err = nl_wait_for_ack(handle);
out:
if (cb)
nl_cb_put(cb);
nla_put_failure:
nlmsg_free(msg);
return err;
}
static int
send_attr(struct nl_msg *msg, void *arg)
{
struct switch_val *val = arg;
struct switch_attr *attr = val->attr;
NLA_PUT_U32(msg, SWITCH_ATTR_ID, attr->dev->id);
NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, attr->id);
switch(attr->atype) {
case SWLIB_ATTR_GROUP_PORT:
NLA_PUT_U32(msg, SWITCH_ATTR_OP_PORT, val->port_vlan);
break;
case SWLIB_ATTR_GROUP_VLAN:
NLA_PUT_U32(msg, SWITCH_ATTR_OP_VLAN, val->port_vlan);
break;
default:
break;
}
return 0;
nla_put_failure:
return -1;
}
static int
store_port_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val)
{
struct nlattr *p;
int ports = val->attr->dev->ports;
int err = 0;
int remaining;
if (!val->value.ports)
val->value.ports = malloc(sizeof(struct switch_port) * ports);
nla_for_each_nested(p, nla, remaining) {
struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
struct switch_port *port;
if (val->len >= ports)
break;
err = nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, p, port_policy);
if (err < 0)
goto out;
if (!tb[SWITCH_PORT_ID])
continue;
port = &val->value.ports[val->len];
port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
port->flags = 0;
if (tb[SWITCH_PORT_FLAG_TAGGED])
port->flags |= SWLIB_PORT_FLAG_TAGGED;
val->len++;
}
out:
return err;
}
static int
store_link_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val)
{
struct nlattr *tb[SWITCH_LINK_ATTR_MAX + 1];
struct switch_port_link *link;
int err = 0;
if (!val->value.link)
val->value.link = malloc(sizeof(struct switch_port_link));
err = nla_parse_nested(tb, SWITCH_LINK_ATTR_MAX, nla, link_policy);
if (err < 0)
goto out;
link = val->value.link;
link->link = !!tb[SWITCH_LINK_FLAG_LINK];
link->duplex = !!tb[SWITCH_LINK_FLAG_DUPLEX];
link->aneg = !!tb[SWITCH_LINK_FLAG_ANEG];
link->tx_flow = !!tb[SWITCH_LINK_FLAG_TX_FLOW];
link->rx_flow = !!tb[SWITCH_LINK_FLAG_RX_FLOW];
link->speed = nla_get_u32(tb[SWITCH_LINK_SPEED]);
link->eee = 0;
if (tb[SWITCH_LINK_FLAG_EEE_100BASET])
link->eee |= SWLIB_LINK_FLAG_EEE_100BASET;
if (tb[SWITCH_LINK_FLAG_EEE_1000BASET])
link->eee |= SWLIB_LINK_FLAG_EEE_1000BASET;
out:
return err;
}
static int
store_val(struct nl_msg *msg, void *arg)
{
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct switch_val *val = arg;
if (!val)
goto error;
if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL) < 0) {
goto error;
}
if (tb[SWITCH_ATTR_OP_VALUE_INT])
val->value.i = nla_get_u32(tb[SWITCH_ATTR_OP_VALUE_INT]);
else if (tb[SWITCH_ATTR_OP_VALUE_STR])
val->value.s = strdup(nla_get_string(tb[SWITCH_ATTR_OP_VALUE_STR]));
else if (tb[SWITCH_ATTR_OP_VALUE_PORTS])
val->err = store_port_val(msg, tb[SWITCH_ATTR_OP_VALUE_PORTS], val);
else if (tb[SWITCH_ATTR_OP_VALUE_LINK])
val->err = store_link_val(msg, tb[SWITCH_ATTR_OP_VALUE_LINK], val);
val->err = 0;
return 0;
error:
return NL_SKIP;
}
int
swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
{
int cmd;
int err;
switch(attr->atype) {
case SWLIB_ATTR_GROUP_GLOBAL:
cmd = SWITCH_CMD_GET_GLOBAL;
break;
case SWLIB_ATTR_GROUP_PORT:
cmd = SWITCH_CMD_GET_PORT;
break;
case SWLIB_ATTR_GROUP_VLAN:
cmd = SWITCH_CMD_GET_VLAN;
break;
default:
return -EINVAL;
}
memset(&val->value, 0, sizeof(val->value));
val->len = 0;
val->attr = attr;
val->err = -EINVAL;
err = swlib_call(cmd, store_val, send_attr, val);
if (!err)
err = val->err;
return err;
}
static int
send_attr_ports(struct nl_msg *msg, struct switch_val *val)
{
struct nlattr *n;
int i;
/* TODO implement multipart? */
if (val->len == 0)
goto done;
n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_PORTS);
if (!n)
goto nla_put_failure;
for (i = 0; i < val->len; i++) {
struct switch_port *port = &val->value.ports[i];
struct nlattr *np;
np = nla_nest_start(msg, SWITCH_ATTR_PORT);
if (!np)
goto nla_put_failure;
NLA_PUT_U32(msg, SWITCH_PORT_ID, port->id);
if (port->flags & SWLIB_PORT_FLAG_TAGGED)
NLA_PUT_FLAG(msg, SWITCH_PORT_FLAG_TAGGED);
nla_nest_end(msg, np);
}
nla_nest_end(msg, n);
done:
return 0;
nla_put_failure:
return -1;
}
static int
send_attr_link(struct nl_msg *msg, struct switch_val *val)
{
struct switch_port_link *link = val->value.link;
struct nlattr *n;
n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_LINK);
if (!n)
goto nla_put_failure;
if (link->duplex)
NLA_PUT_FLAG(msg, SWITCH_LINK_FLAG_DUPLEX);
if (link->aneg)
NLA_PUT_FLAG(msg, SWITCH_LINK_FLAG_ANEG);
NLA_PUT_U32(msg, SWITCH_LINK_SPEED, link->speed);
nla_nest_end(msg, n);
return 0;
nla_put_failure:
return -1;
}
static int
send_attr_val(struct nl_msg *msg, void *arg)
{
struct switch_val *val = arg;
struct switch_attr *attr = val->attr;
if (send_attr(msg, arg))
goto nla_put_failure;
switch(attr->type) {
case SWITCH_TYPE_NOVAL:
break;
case SWITCH_TYPE_INT:
NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val->value.i);
break;
case SWITCH_TYPE_STRING:
if (!val->value.s)
goto nla_put_failure;
NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val->value.s);
break;
case SWITCH_TYPE_PORTS:
if (send_attr_ports(msg, val) < 0)
goto nla_put_failure;
break;
case SWITCH_TYPE_LINK:
if (send_attr_link(msg, val))
goto nla_put_failure;
break;
default:
goto nla_put_failure;
}
return 0;
nla_put_failure:
return -1;
}
int
swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
{
int cmd;
switch(attr->atype) {
case SWLIB_ATTR_GROUP_GLOBAL:
cmd = SWITCH_CMD_SET_GLOBAL;
break;
case SWLIB_ATTR_GROUP_PORT:
cmd = SWITCH_CMD_SET_PORT;
break;
case SWLIB_ATTR_GROUP_VLAN:
cmd = SWITCH_CMD_SET_VLAN;
break;
default:
return -EINVAL;
}
val->attr = attr;
return swlib_call(cmd, NULL, send_attr_val, val);
}
enum {
CMD_NONE,
CMD_DUPLEX,
CMD_ANEG,
CMD_SPEED,
};
int swlib_set_attr_string(struct switch_dev *dev, struct switch_attr *a, int port_vlan, const char *str)
{
struct switch_port *ports;
struct switch_port_link *link;
struct switch_val val;
char *ptr;
int cmd = CMD_NONE;
memset(&val, 0, sizeof(val));
val.port_vlan = port_vlan;
switch(a->type) {
case SWITCH_TYPE_INT:
val.value.i = atoi(str);
break;
case SWITCH_TYPE_STRING:
val.value.s = (char *)str;
break;
case SWITCH_TYPE_PORTS:
ports = alloca(sizeof(struct switch_port) * dev->ports);
memset(ports, 0, sizeof(struct switch_port) * dev->ports);
val.len = 0;
ptr = (char *)str;
while(ptr && *ptr)
{
while(*ptr && isspace(*ptr))
ptr++;
if (!*ptr)
break;
if (!isdigit(*ptr))
return -1;
if (val.len >= dev->ports)
return -1;
ports[val.len].flags = 0;
ports[val.len].id = strtoul(ptr, &ptr, 10);
while(*ptr && !isspace(*ptr)) {
if (*ptr == 't')
ports[val.len].flags |= SWLIB_PORT_FLAG_TAGGED;
else
return -1;
ptr++;
}
if (*ptr)
ptr++;
val.len++;
}
val.value.ports = ports;
break;
case SWITCH_TYPE_LINK:
link = malloc(sizeof(struct switch_port_link));
memset(link, 0, sizeof(struct switch_port_link));
ptr = (char *)str;
for (ptr = strtok(ptr," "); ptr; ptr = strtok(NULL, " ")) {
switch (cmd) {
case CMD_NONE:
if (!strcmp(ptr, "duplex"))
cmd = CMD_DUPLEX;
else if (!strcmp(ptr, "autoneg"))
cmd = CMD_ANEG;
else if (!strcmp(ptr, "speed"))
cmd = CMD_SPEED;
else
fprintf(stderr, "Unsupported option %s\n", ptr);
break;
case CMD_DUPLEX:
if (!strcmp(ptr, "half"))
link->duplex = 0;
else if (!strcmp(ptr, "full"))
link->duplex = 1;
else
fprintf(stderr, "Unsupported value %s\n", ptr);
cmd = CMD_NONE;
break;
case CMD_ANEG:
if (!strcmp(ptr, "on"))
link->aneg = 1;
else if (!strcmp(ptr, "off"))
link->aneg = 0;
else
fprintf(stderr, "Unsupported value %s\n", ptr);
cmd = CMD_NONE;
break;
case CMD_SPEED:
link->speed = atoi(ptr);
cmd = CMD_NONE;
break;
}
}
val.value.link = link;
break;
case SWITCH_TYPE_NOVAL:
if (str && !strcmp(str, "0"))
return 0;
break;
default:
return -1;
}
return swlib_set_attr(dev, a, &val);
}
struct attrlist_arg {
int id;
int atype;
struct switch_dev *dev;
struct switch_attr *prev;
struct switch_attr **head;
};
static int
add_id(struct nl_msg *msg, void *arg)
{
struct attrlist_arg *l = arg;
NLA_PUT_U32(msg, SWITCH_ATTR_ID, l->id);
return 0;
nla_put_failure:
return -1;
}
static int
add_attr(struct nl_msg *msg, void *ptr)
{
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct attrlist_arg *arg = ptr;
struct switch_attr *new;
if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL) < 0)
goto done;
new = swlib_alloc(sizeof(struct switch_attr));
if (!new)
goto done;
new->dev = arg->dev;
new->atype = arg->atype;
if (arg->prev) {
arg->prev->next = new;
} else {
arg->prev = *arg->head;
}
*arg->head = new;
arg->head = &new->next;
if (tb[SWITCH_ATTR_OP_ID])
new->id = nla_get_u32(tb[SWITCH_ATTR_OP_ID]);
if (tb[SWITCH_ATTR_OP_TYPE])
new->type = nla_get_u32(tb[SWITCH_ATTR_OP_TYPE]);
if (tb[SWITCH_ATTR_OP_NAME])
new->name = strdup(nla_get_string(tb[SWITCH_ATTR_OP_NAME]));
if (tb[SWITCH_ATTR_OP_DESCRIPTION])
new->description = strdup(nla_get_string(tb[SWITCH_ATTR_OP_DESCRIPTION]));
done:
return NL_SKIP;
}
int
swlib_scan(struct switch_dev *dev)
{
struct attrlist_arg arg;
if (dev->ops || dev->port_ops || dev->vlan_ops)
return 0;
arg.atype = SWLIB_ATTR_GROUP_GLOBAL;
arg.dev = dev;
arg.id = dev->id;
arg.prev = NULL;
arg.head = &dev->ops;
swlib_call(SWITCH_CMD_LIST_GLOBAL, add_attr, add_id, &arg);
arg.atype = SWLIB_ATTR_GROUP_PORT;
arg.prev = NULL;
arg.head = &dev->port_ops;
swlib_call(SWITCH_CMD_LIST_PORT, add_attr, add_id, &arg);
arg.atype = SWLIB_ATTR_GROUP_VLAN;
arg.prev = NULL;
arg.head = &dev->vlan_ops;
swlib_call(SWITCH_CMD_LIST_VLAN, add_attr, add_id, &arg);
return 0;
}
struct switch_attr *swlib_lookup_attr(struct switch_dev *dev,
enum swlib_attr_group atype, const char *name)
{
struct switch_attr *head;
if (!name || !dev)
return NULL;
switch(atype) {
case SWLIB_ATTR_GROUP_GLOBAL:
head = dev->ops;
break;
case SWLIB_ATTR_GROUP_PORT:
head = dev->port_ops;
break;
case SWLIB_ATTR_GROUP_VLAN:
head = dev->vlan_ops;
break;
}
while(head) {
if (!strcmp(name, head->name))
return head;
head = head->next;
}
return NULL;
}
static void
swlib_priv_free(void)
{
if (family)
nl_object_put((struct nl_object*)family);
if (cache)
nl_cache_free(cache);
if (handle)
nl_socket_free(handle);
family = NULL;
handle = NULL;
cache = NULL;
}
static int
swlib_priv_init(void)
{
int ret;
handle = nl_socket_alloc();
if (!handle) {
DPRINTF("Failed to create handle\n");
goto err;
}
if (genl_connect(handle)) {
DPRINTF("Failed to connect to generic netlink\n");
goto err;
}
ret = genl_ctrl_alloc_cache(handle, &cache);
if (ret < 0) {
DPRINTF("Failed to allocate netlink cache\n");
goto err;
}
family = genl_ctrl_search_by_name(cache, "switch");
if (!family) {
DPRINTF("Switch API not present\n");
goto err;
}
return 0;
err:
swlib_priv_free();
return -EINVAL;
}
struct swlib_scan_arg {
const char *name;
struct switch_dev *head;
struct switch_dev *ptr;
};
static int
add_port_map(struct switch_dev *dev, struct nlattr *nla)
{
struct nlattr *p;
int err = 0, idx = 0;
int remaining;
dev->maps = malloc(sizeof(struct switch_portmap) * dev->ports);
if (!dev->maps)
return -1;
memset(dev->maps, 0, sizeof(struct switch_portmap) * dev->ports);
nla_for_each_nested(p, nla, remaining) {
struct nlattr *tb[SWITCH_PORTMAP_MAX+1];
if (idx >= dev->ports)
continue;
err = nla_parse_nested(tb, SWITCH_PORTMAP_MAX, p, portmap_policy);
if (err < 0)
continue;
if (tb[SWITCH_PORTMAP_SEGMENT] && tb[SWITCH_PORTMAP_VIRT]) {
dev->maps[idx].segment = strdup(nla_get_string(tb[SWITCH_PORTMAP_SEGMENT]));
dev->maps[idx].virt = nla_get_u32(tb[SWITCH_PORTMAP_VIRT]);
}
idx++;
}
out:
return err;
}
static int
add_switch(struct nl_msg *msg, void *arg)
{
struct swlib_scan_arg *sa = arg;
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct switch_dev *dev;
const char *name;
const char *alias;
if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
goto done;
if (!tb[SWITCH_ATTR_DEV_NAME])
goto done;
name = nla_get_string(tb[SWITCH_ATTR_DEV_NAME]);
alias = nla_get_string(tb[SWITCH_ATTR_ALIAS]);
if (sa->name && (strcmp(name, sa->name) != 0) && (strcmp(alias, sa->name) != 0))
goto done;
dev = swlib_alloc(sizeof(struct switch_dev));
if (!dev)
goto done;
strncpy(dev->dev_name, name, IFNAMSIZ - 1);
dev->alias = strdup(alias);
if (tb[SWITCH_ATTR_ID])
dev->id = nla_get_u32(tb[SWITCH_ATTR_ID]);
if (tb[SWITCH_ATTR_NAME])
dev->name = strdup(nla_get_string(tb[SWITCH_ATTR_NAME]));
if (tb[SWITCH_ATTR_PORTS])
dev->ports = nla_get_u32(tb[SWITCH_ATTR_PORTS]);
if (tb[SWITCH_ATTR_VLANS])
dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]);
if (tb[SWITCH_ATTR_CPU_PORT])
dev->cpu_port = nla_get_u32(tb[SWITCH_ATTR_CPU_PORT]);
if (tb[SWITCH_ATTR_PORTMAP])
add_port_map(dev, tb[SWITCH_ATTR_PORTMAP]);
if (!sa->head) {
sa->head = dev;
sa->ptr = dev;
} else {
sa->ptr->next = dev;
sa->ptr = dev;
}
refcount++;
done:
return NL_SKIP;
}
static int
list_switch(struct nl_msg *msg, void *arg)
{
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
goto done;
if (!tb[SWITCH_ATTR_DEV_NAME] || !tb[SWITCH_ATTR_NAME])
goto done;
printf("Found: %s - %s\n", nla_get_string(tb[SWITCH_ATTR_DEV_NAME]),
nla_get_string(tb[SWITCH_ATTR_ALIAS]));
done:
return NL_SKIP;
}
void
swlib_list(void)
{
if (swlib_priv_init() < 0)
return;
swlib_call(SWITCH_CMD_GET_SWITCH, list_switch, NULL, NULL);
swlib_priv_free();
}
void
swlib_print_portmap(struct switch_dev *dev, char *segment)
{
int i;
if (segment) {
if (!strcmp(segment, "cpu")) {
printf("%d ", dev->cpu_port);
} else if (!strcmp(segment, "disabled")) {
for (i = 0; i < dev->ports; i++)
if (!dev->maps[i].segment)
printf("%d ", i);
} else for (i = 0; i < dev->ports; i++) {
if (dev->maps[i].segment && !strcmp(dev->maps[i].segment, segment))
printf("%d ", i);
}
} else {
printf("%s - %s\n", dev->dev_name, dev->name);
for (i = 0; i < dev->ports; i++)
if (i == dev->cpu_port)
printf("port%d:\tcpu\n", i);
else if (dev->maps[i].segment)
printf("port%d:\t%s.%d\n", i, dev->maps[i].segment, dev->maps[i].virt);
else
printf("port%d:\tdisabled\n", i);
}
}
struct switch_dev *
swlib_connect(const char *name)
{
struct swlib_scan_arg arg;
if (!refcount) {
if (swlib_priv_init() < 0)
return NULL;
};
arg.head = NULL;
arg.ptr = NULL;
arg.name = name;
swlib_call(SWITCH_CMD_GET_SWITCH, add_switch, NULL, &arg);
if (!refcount)
swlib_priv_free();
return arg.head;
}
static void
swlib_free_attributes(struct switch_attr **head)
{
struct switch_attr *a = *head;
struct switch_attr *next;
while (a) {
next = a->next;
free(a->name);
free(a->description);
free(a);
a = next;
}
*head = NULL;
}
static void
swlib_free_port_map(struct switch_dev *dev)
{
int i;
if (!dev || !dev->maps)
return;
for (i = 0; i < dev->ports; i++)
free(dev->maps[i].segment);
free(dev->maps);
}
void
swlib_free(struct switch_dev *dev)
{
swlib_free_attributes(&dev->ops);
swlib_free_attributes(&dev->port_ops);
swlib_free_attributes(&dev->vlan_ops);
swlib_free_port_map(dev);
free(dev->name);
free(dev->alias);
free(dev);
if (--refcount == 0)
swlib_priv_free();
}
void
swlib_free_all(struct switch_dev *dev)
{
struct switch_dev *p;
while (dev) {
p = dev->next;
swlib_free(dev);
dev = p;
}
}