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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <net/ethernet.h>
#include "triton.h"
#include "events.h"
#include "log.h"
#include "memdebug.h"
#include "ipoe.h"
#include "backup.h"
#include "ap_session_backup.h"
#define IPOE_TAG_HWADDR 1
#define IPOE_TAG_CLIENT_ID 2
#define IPOE_TAG_AGENT_CIRCUIT_ID 3
#define IPOE_TAG_AGENT_REMOTE_ID 4
#define IPOE_TAG_XID 5
#define IPOE_TAG_GIADDR 6
#define IPOE_TAG_CALLING_SID 7
#define IPOE_TAG_CALLED_SID 8
#define IPOE_TAG_IFNAME 9
#define IPOE_TAG_FLAGS 10
#define IPOE_TAG_YIADDR 11
#define IPOE_TAG_SIADDR 12
#define IPOE_TAG_MASK 13
#define IPOE_TAG_IFINDEX 100
#define IPOE_FLAG_IFCFG 0x01
#define IPOE_FLAG_DHCP_ADDR 0x02
#define IPOE_FLAG_L4_REDIR 0x04
#define add_tag(id, data, size) if (!backup_add_tag(m, id, 0, data, size)) return -1;
#define add_tag_i(id, data, size) if (!backup_add_tag(m, id, 1, data, size)) return -1;
static LIST_HEAD(ds_list);
static void restore_complete(void);
#ifdef USE_BACKUP
static int session_save(struct ap_session *ses, struct backup_mod *m)
{
struct ipoe_session *conn = container_of(ses, typeof(*conn), ses);
int flags = 0;
if (conn->ifcfg)
flags |= IPOE_FLAG_IFCFG;
if (conn->dhcp_addr)
flags |= IPOE_FLAG_DHCP_ADDR;
if (conn->l4_redirect)
flags |= IPOE_FLAG_L4_REDIR;
add_tag(IPOE_TAG_HWADDR, conn->hwaddr, 6);
add_tag(IPOE_TAG_CALLING_SID, ses->ctrl->calling_station_id, strlen(ses->ctrl->calling_station_id));
add_tag(IPOE_TAG_CALLED_SID, ses->ctrl->called_station_id, strlen(ses->ctrl->called_station_id));
add_tag(IPOE_TAG_XID, &conn->xid, 4);
add_tag(IPOE_TAG_GIADDR, &conn->giaddr, 4);
add_tag(IPOE_TAG_YIADDR, &conn->yiaddr, 4);
add_tag(IPOE_TAG_SIADDR, &conn->siaddr, 4);
add_tag(IPOE_TAG_MASK, &conn->mask, 1);
add_tag(IPOE_TAG_FLAGS, &flags, 4);
if (conn->client_id)
add_tag(IPOE_TAG_CLIENT_ID, conn->client_id->data, conn->client_id->len);
if (conn->agent_circuit_id)
add_tag(IPOE_TAG_AGENT_CIRCUIT_ID, conn->agent_circuit_id->data, conn->agent_circuit_id->len);
if (conn->agent_circuit_id)
add_tag(IPOE_TAG_AGENT_REMOTE_ID, conn->agent_remote_id->data, conn->agent_remote_id->len);
add_tag(IPOE_TAG_IFNAME, conn->serv->ifname, strlen(conn->serv->ifname) + 1);
add_tag_i(IPOE_TAG_IFINDEX, &conn->ifindex, 4);
return 0;
}
static int session_restore(struct ap_session *ses, struct backup_mod *m)
{
struct ipoe_session *conn = container_of(ses, typeof(*conn), ses);
return 0;
}
static void set_dhcpv4_opt(struct dhcp_opt **opt, struct backup_tag *t, uint8_t **ptr)
{
*opt = (struct dhcp_opt *)(*ptr);
(*opt)->len = t->size;
memcpy((*opt)->data, t->data, t->size);
(*ptr) += sizeof(**opt) + t->size;
}
static struct ap_session *ctrl_restore(struct backup_mod *m)
{
struct backup_tag *t;
struct ipoe_session *ses;
struct ipoe_serv *serv;
struct backup_tag *ifname = NULL;
int dlen = 0;
uint8_t *ptr;
struct ipoe_session_info *info;
int flags = 0;
//if (!m->data->internal)
// return NULL;
list_for_each_entry(t, &m->tag_list, entry) {
switch(t->id) {
case IPOE_TAG_CLIENT_ID:
case IPOE_TAG_AGENT_CIRCUIT_ID:
case IPOE_TAG_AGENT_REMOTE_ID:
dlen += sizeof(struct dhcp_opt) + t->size;
break;
case IPOE_TAG_IFNAME:
ifname = t;
break;
}
}
if (!ifname)
return NULL;
serv = ipoe_find_serv((char *)ifname->data);
if (!serv)
return NULL;
ses = ipoe_session_alloc();
if (!ses)
return NULL;
if (dlen)
ses->data = _malloc(dlen);
ptr = ses->data;
list_for_each_entry(t, &m->tag_list, entry) {
switch(t->id) {
case IPOE_TAG_HWADDR:
memcpy(ses->hwaddr, t->data, 6);
break;
case IPOE_TAG_CALLING_SID:
ses->ctrl.calling_station_id = _malloc(t->size + 1);
memcpy(ses->ctrl.calling_station_id, t->data, t->size);
ses->ctrl.calling_station_id[t->size] = 0;
break;
case IPOE_TAG_CALLED_SID:
ses->ctrl.called_station_id = _malloc(t->size + 1);
memcpy(ses->ctrl.called_station_id, t->data, t->size);
ses->ctrl.called_station_id[t->size] = 0;
break;
case IPOE_TAG_XID:
ses->xid = *(uint32_t *)t->data;
break;
case IPOE_TAG_GIADDR:
ses->giaddr = *(uint32_t *)t->data;
break;
case IPOE_TAG_CLIENT_ID:
set_dhcpv4_opt(&ses->client_id, t, &ptr);
break;
case IPOE_TAG_AGENT_CIRCUIT_ID:
set_dhcpv4_opt(&ses->agent_circuit_id, t, &ptr);
break;
case IPOE_TAG_AGENT_REMOTE_ID:
set_dhcpv4_opt(&ses->agent_remote_id, t, &ptr);
break;
case IPOE_TAG_IFINDEX:
ses->ifindex = *(uint32_t *)t->data;
break;
case IPOE_TAG_YIADDR:
ses->yiaddr = *(uint32_t *)t->data;
break;
case IPOE_TAG_SIADDR:
ses->siaddr = *(uint32_t *)t->data;
break;
case IPOE_TAG_MASK:
ses->mask = *(uint8_t *)t->data;
break;
case IPOE_TAG_FLAGS:
flags = *(uint32_t *)t->data;
break;
}
}
if (flags & IPOE_FLAG_IFCFG)
ses->ifcfg = 1;
if (flags & IPOE_FLAG_DHCP_ADDR) {
dhcpv4_reserve_ip(ses->serv->dhcpv4, ses->yiaddr);
ses->dhcp_addr = 1;
}
if (flags & IPOE_FLAG_L4_REDIR)
ses->l4_redirect = 1;
ses->serv = serv;
triton_context_register(&ses->ctx, &ses->ses);
triton_context_wakeup(&ses->ctx);
pthread_mutex_lock(&serv->lock);
list_add_tail(&ses->entry, &serv->sessions);
pthread_mutex_unlock(&serv->lock);
if (ses->ifindex != -1) {
list_for_each_entry(info, &ds_list, entry) {
if (info->ifindex == ses->ifindex) {
list_del(&info->entry);
_free(info);
break;
}
}
}
return &ses->ses;
}
static struct backup_module mod = {
.id = MODID_IPOE,
.save = session_save,
.restore = session_restore,
.ctrl_restore = ctrl_restore,
.restore_complete = restore_complete,
};
#endif
static void dump_sessions(void)
{
ipoe_nl_get_sessions(&ds_list);
#ifndef USE_BACKUP
restore_complete();
#endif
}
static void restore_complete(void)
{
struct ipoe_session_info *info;
while (!list_empty(&ds_list)) {
info = list_entry(ds_list.next, typeof(*info), entry);
ipoe_nl_delete(info->ifindex);
list_del(&info->entry);
_free(info);
}
}
static void init(void)
{
dump_sessions();
#ifdef USE_BACKUP
backup_register_module(&mod);
#endif
}
DEFINE_INIT(100, init);
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