/**
* rmnet_map_do_flow_control() - Process MAP flow control command
* @skb: Socket buffer containing the MAP flow control message
* @config: Physical end-point configuration of ingress device
* @enable: boolean for enable/disable
*
* Process in-band MAP flow control messages. Assumes mux ID is mapped to a
* RmNet Data vitrual network device.
*
* Return:
* - RMNET_MAP_COMMAND_UNSUPPORTED on any error
* - RMNET_MAP_COMMAND_ACK on success
*/
static uint8_t rmnet_map_do_flow_control(struct sk_buff *skb,
struct rmnet_phys_ep_conf_s *config,
int enable)
{
struct rmnet_map_control_command_s *cmd;
struct net_device *vnd;
struct rmnet_logical_ep_conf_s *ep;
uint8_t mux_id;
uint16_t ip_family;
uint16_t fc_seq;
uint32_t qos_id;
int r;
if (unlikely(!skb || !config))
BUG();
mux_id = RMNET_MAP_GET_MUX_ID(skb);
cmd = RMNET_MAP_GET_CMD_START(skb);
if (mux_id >= RMNET_DATA_MAX_LOGICAL_EP) {
LOGD("Got packet on %s with bad mux id %d",
skb->dev->name, mux_id);
rmnet_kfree_skb(skb, RMNET_STATS_SKBFREE_MAPC_BAD_MUX);
return RX_HANDLER_CONSUMED;
}
ep = &(config->muxed_ep[mux_id]);
if (!ep->refcount) {
LOGD("Packet on %s:%d; has no logical endpoint config",
skb->dev->name, mux_id);
rmnet_kfree_skb(skb, RMNET_STATS_SKBFREE_MAPC_MUX_NO_EP);
return RX_HANDLER_CONSUMED;
}
vnd = ep->egress_dev;
ip_family = cmd->flow_control.ip_family;
fc_seq = ntohs(cmd->flow_control.flow_control_seq_num);
qos_id = ntohl(cmd->flow_control.qos_id);
/* Ignore the ip family and pass the sequence number for both v4 and v6
* sequence. User space does not support creating dedicated flows for
* the 2 protocols
*/
r = rmnet_vnd_do_flow_control(vnd, qos_id, fc_seq, fc_seq, enable);
LOGD("dev:%s, qos_id:0x%08X, ip_family:%hd, fc_seq %hd, en:%d",
skb->dev->name, qos_id, ip_family & 3, fc_seq, enable);
if (r)
return RMNET_MAP_COMMAND_UNSUPPORTED;
else
return RMNET_MAP_COMMAND_ACK;
}
static u8 rmnet_map_do_flow_control(struct sk_buff *skb,
struct rmnet_port *port,
int enable)
{
struct rmnet_map_control_command *cmd;
struct rmnet_endpoint *ep;
struct net_device *vnd;
u16 ip_family;
u16 fc_seq;
u32 qos_id;
u8 mux_id;
int r;
mux_id = RMNET_MAP_GET_MUX_ID(skb);
cmd = RMNET_MAP_GET_CMD_START(skb);
if (mux_id >= RMNET_MAX_LOGICAL_EP) {
kfree_skb(skb);
return RX_HANDLER_CONSUMED;
}
ep = rmnet_get_endpoint(port, mux_id);
if (!ep) {
kfree_skb(skb);
return RX_HANDLER_CONSUMED;
}
vnd = ep->egress_dev;
ip_family = cmd->flow_control.ip_family;
fc_seq = ntohs(cmd->flow_control.flow_control_seq_num);
qos_id = ntohl(cmd->flow_control.qos_id);
/* Ignore the ip family and pass the sequence number for both v4 and v6
* sequence. User space does not support creating dedicated flows for
* the 2 protocols
*/
r = rmnet_vnd_do_flow_control(vnd, enable);
if (r) {
kfree_skb(skb);
return RMNET_MAP_COMMAND_UNSUPPORTED;
} else {
return RMNET_MAP_COMMAND_ACK;
}
}
