/*
* Description: This function is called by Netfilter when packet hits
* the ip post routing hook. The packet is sent to EMFL
* only when it is going on to bridge port.
*
* Input: skb - Pointer to the packet buffer. Other parameters
* are not used.
*
* Return: Returns the value indicating packet can be forwarded
* or packet is stolen.
*/
static uint32
emf_ip_post_hook(uint32 hook, struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int32 (*okfn)(struct sk_buff *))
{
emf_info_t *emfi;
ASSERT(skb->protocol == __constant_htons(ETH_P_IP));
EMF_DEBUG("Frame at IP_POST_HOOK going to if %p %s\n",
skb->dev, skb->dev->name);
/* Find the LAN that the bridge interface corresponds to */
emfi = emf_instance_find_by_brptr(emf, skb->dev);
if (emfi == NULL)
{
EMF_INFO("No EMF processing needed for unknown ports\n");
return (NF_ACCEPT);
}
EMF_DUMP_PKT(skb->data);
return (emfc_input(emfi->emfci, skb, skb->dev,
PKTDATA(NULL, skb), TRUE));
}
/*
* Description: This function is called by Netfilter when packet hits
* the ip post routing hook. The packet is sent to EMFL
* only when it is going on to bridge port.
*
* Input: pskb - Pointer to the packet buffer. Other parameters
* are not used.
*
* Return: Returns the value indicating packet can be forwarded
* or packet is stolen.
*/
static uint32
emf_ip_post_hook(
uint32 hook,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
struct sk_buff *skb,
#else
struct sk_buff **pskb,
#endif
const struct net_device *in,
const struct net_device *out,
int32 (*okfn)(struct sk_buff *))
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
struct sk_buff **pskb = &skb;
#endif
emf_info_t *emfi;
ASSERT((*pskb)->protocol == __constant_htons(ETH_P_IP));
EMF_DEBUG("Frame at IP_POST_HOOK going to if %p %s\n",
(*pskb)->dev, (*pskb)->dev->name);
/* Find the LAN that the bridge interface corresponds to */
emfi = emf_instance_find_by_brptr(emf, (*pskb)->dev);
if (emfi == NULL)
{
EMF_INFO("No EMF processing needed for unknown ports\n");
return (NF_ACCEPT);
}
EMF_DUMP_PKT((*pskb)->data);
return (emfc_input(emfi->emfci, *pskb, (*pskb)->dev,
PKTDATA(NULL, *pskb), TRUE));
}
/*
* Description: This function handles the OS specific processing
* required for configuration commands.
*
* Input: data - Configuration command parameters
*/
void
emf_cfg_request_process(emf_cfg_request_t *cfg)
{
emf_info_t *emfi;
emf_cfg_mfdb_t *mfdb;
emf_cfg_uffp_t *uffp;
emf_cfg_rtport_t *rtport;
emf_cfg_if_t *if_cfg;
emf_iflist_t *iflist_prev;
struct net_device *if_ptr, *br_ptr;
if (cfg == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg, "Invalid input buffer passed\n");
return;
}
/* Validate the instance identifier */
br_ptr = emf_if_name_validate(cfg->inst_id);
if (br_ptr == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg, "Unknown instance identifier %s\n",
cfg->inst_id);
return;
}
/* Locate the EMF instance */
emfi = emf_instance_find_by_brptr(emf, br_ptr);
if ((emfi == NULL) && (cfg->command_id != EMFCFG_CMD_BR_ADD))
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg, "Invalid instance identifier %s\n",
cfg->inst_id);
return;
}
/* Convert the interface name in arguments to interface pointer */
switch (cfg->command_id)
{
case EMFCFG_CMD_MFDB_ADD:
case EMFCFG_CMD_MFDB_DEL:
mfdb = (emf_cfg_mfdb_t *)cfg->arg;
mfdb->if_ptr = emf_if_name_validate(mfdb->if_name);
if (mfdb->if_ptr == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Invalid interface specified "
"during MFDB entry add/delete\n");
return;
}
/* The interfaces specified should be in the iflist */
if ((strncmp(mfdb->if_name, "wds", 3) != 0) &&
(emf_iflist_find(emf, emfi, mfdb->if_ptr, &iflist_prev) == NULL))
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Interface not part of bridge %s\n",
br_ptr->name);
return;
}
emfc_cfg_request_process(emfi->emfci, cfg);
break;
case EMFCFG_CMD_IF_ADD:
case EMFCFG_CMD_IF_DEL:
/* Add/Del the interface to/from the global list */
if_cfg = (emf_cfg_if_t *)cfg->arg;
if_ptr = emf_if_name_validate(if_cfg->if_name);
if (if_ptr == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Invalid interface specified\n");
return;
}
if (cfg->command_id == EMFCFG_CMD_IF_ADD)
{
if (emf_iflist_add(emf, emfi, if_ptr) != SUCCESS)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Interface add failed\n");
return;
}
if (emfc_iflist_add(emfi->emfci, if_ptr) != SUCCESS)
{
emf_iflist_del(emf, emfi, if_ptr);
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Interface add failed\n");
return;
}
}
if (cfg->command_id == EMFCFG_CMD_IF_DEL)
{
if ((emf_iflist_del(emf, emfi, if_ptr) != SUCCESS) ||
(emfc_iflist_del(emfi->emfci, if_ptr) != SUCCESS))
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Interface delete failed\n");
return;
}
}
cfg->status = EMFCFG_STATUS_SUCCESS;
break;
case EMFCFG_CMD_IF_LIST:
if (emf_iflist_list(emfi, (emf_cfg_if_list_t *)cfg->arg,
cfg->size) != SUCCESS)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size += sprintf(cfg->arg, "EMF if list get failed\n");
break;
}
cfg->status = EMFCFG_STATUS_SUCCESS;
break;
case EMFCFG_CMD_BR_ADD:
if (emfi != NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"EMF already configured for %s\n",
cfg->inst_id);
return;
}
/* Create a new EMF instance corresponding to the bridge
* interface.
*/
emfi = emf_instance_add(emf, cfg->inst_id, br_ptr);
if (emfi == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg, "EMF add on %s failed\n",
cfg->inst_id);
return;
}
cfg->status = EMFCFG_STATUS_SUCCESS;
break;
case EMFCFG_CMD_BR_DEL:
/* Delete and free the EMF instance */
if (emf_instance_del(emf, emfi) != SUCCESS)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg, "EMF delete on %s failed\n",
cfg->inst_id);
return;
}
cfg->status = EMFCFG_STATUS_SUCCESS;
break;
case EMFCFG_CMD_UFFP_ADD:
case EMFCFG_CMD_UFFP_DEL:
uffp = (emf_cfg_uffp_t *)cfg->arg;
if_ptr = uffp->if_ptr = emf_if_name_validate(uffp->if_name);
/* FALLTHRU */
case EMFCFG_CMD_RTPORT_ADD:
case EMFCFG_CMD_RTPORT_DEL:
rtport = (emf_cfg_rtport_t *)cfg->arg;
if_ptr = rtport->if_ptr = emf_if_name_validate(rtport->if_name);
if (if_ptr == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Invalid iface specified for deletion\n");
return;
}
if (emf_iflist_find(emf, emfi, if_ptr, &iflist_prev) == NULL)
{
cfg->status = EMFCFG_STATUS_FAILURE;
cfg->size = sprintf(cfg->arg,
"Interface not part of bridge %s\n",
br_ptr->name);
return;
}
emfc_cfg_request_process(emfi->emfci, cfg);
break;
default:
emfc_cfg_request_process(emfi->emfci, cfg);
break;
}
return;
}
