// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/etherdevice.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/udp.h>
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#include <linux/in.h>
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#include <linux/if_arp.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/in6.h>
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#include <linux/tcp.h>
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#include <linux/icmp.h>
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#include <linux/icmpv6.h>
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#include <linux/uaccess.h>
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#include <linux/errno.h>
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#include <net/ndisc.h>
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#include "gdm_lte.h"
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#include "netlink_k.h"
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#include "hci.h"
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#include "hci_packet.h"
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#include "gdm_endian.h"
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/*
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* Netlink protocol number
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*/
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#define NETLINK_LTE 30
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/*
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* Default MTU Size
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*/
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#define DEFAULT_MTU_SIZE 1500
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#define IP_VERSION_4 4
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#define IP_VERSION_6 6
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static struct {
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int ref_cnt;
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struct sock *sock;
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} lte_event;
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static struct device_type wwan_type = {
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.name = "wwan",
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};
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static int gdm_lte_open(struct net_device *dev)
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{
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netif_start_queue(dev);
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return 0;
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}
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static int gdm_lte_close(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return 0;
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}
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static int gdm_lte_set_config(struct net_device *dev, struct ifmap *map)
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{
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if (dev->flags & IFF_UP)
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return -EBUSY;
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return 0;
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}
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static void tx_complete(void *arg)
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{
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struct nic *nic = arg;
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if (netif_queue_stopped(nic->netdev))
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netif_wake_queue(nic->netdev);
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}
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static int gdm_lte_rx(struct sk_buff *skb, struct nic *nic, int nic_type)
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{
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int ret;
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ret = netif_rx_ni(skb);
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if (ret == NET_RX_DROP) {
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nic->stats.rx_dropped++;
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} else {
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nic->stats.rx_packets++;
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nic->stats.rx_bytes += skb->len + ETH_HLEN;
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}
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return 0;
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}
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static int gdm_lte_emulate_arp(struct sk_buff *skb_in, u32 nic_type)
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{
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struct nic *nic = netdev_priv(skb_in->dev);
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struct sk_buff *skb_out;
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struct ethhdr eth;
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struct vlan_ethhdr vlan_eth;
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struct arphdr *arp_in;
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struct arphdr *arp_out;
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struct arpdata {
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u8 ar_sha[ETH_ALEN];
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u8 ar_sip[4];
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u8 ar_tha[ETH_ALEN];
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u8 ar_tip[4];
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};
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struct arpdata *arp_data_in;
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struct arpdata *arp_data_out;
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u8 arp_temp[60];
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void *mac_header_data;
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u32 mac_header_len;
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/* Check for skb->len, discard if empty */
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if (skb_in->len == 0)
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return -ENODATA;
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/* Format the mac header so that it can be put to skb */
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if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) {
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memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr));
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mac_header_data = &vlan_eth;
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mac_header_len = VLAN_ETH_HLEN;
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} else {
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memcpy(ð, skb_in->data, sizeof(struct ethhdr));
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mac_header_data = ð
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mac_header_len = ETH_HLEN;
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}
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/* Get the pointer of the original request */
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arp_in = (struct arphdr *)(skb_in->data + mac_header_len);
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arp_data_in = (struct arpdata *)(skb_in->data + mac_header_len +
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sizeof(struct arphdr));
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/* Get the pointer of the outgoing response */
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arp_out = (struct arphdr *)arp_temp;
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arp_data_out = (struct arpdata *)(arp_temp + sizeof(struct arphdr));
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/* Copy the arp header */
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memcpy(arp_out, arp_in, sizeof(struct arphdr));
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arp_out->ar_op = htons(ARPOP_REPLY);
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/* Copy the arp payload: based on 2 bytes of mac and fill the IP */
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arp_data_out->ar_sha[0] = arp_data_in->ar_sha[0];
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arp_data_out->ar_sha[1] = arp_data_in->ar_sha[1];
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memcpy(&arp_data_out->ar_sha[2], &arp_data_in->ar_tip[0], 4);
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memcpy(&arp_data_out->ar_sip[0], &arp_data_in->ar_tip[0], 4);
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memcpy(&arp_data_out->ar_tha[0], &arp_data_in->ar_sha[0], 6);
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memcpy(&arp_data_out->ar_tip[0], &arp_data_in->ar_sip[0], 4);
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/* Fill the destination mac with source mac of the received packet */
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memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN);
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/* Fill the source mac with nic's source mac */
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memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
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/* Alloc skb and reserve align */
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skb_out = dev_alloc_skb(skb_in->len);
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if (!skb_out)
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return -ENOMEM;
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skb_reserve(skb_out, NET_IP_ALIGN);
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skb_put_data(skb_out, mac_header_data, mac_header_len);
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skb_put_data(skb_out, arp_out, sizeof(struct arphdr));
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skb_put_data(skb_out, arp_data_out, sizeof(struct arpdata));
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skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
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skb_out->dev = skb_in->dev;
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skb_reset_mac_header(skb_out);
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skb_pull(skb_out, ETH_HLEN);
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gdm_lte_rx(skb_out, nic, nic_type);
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return 0;
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}
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static __sum16 icmp6_checksum(struct ipv6hdr *ipv6, u16 *ptr, int len)
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{
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unsigned short *w = ptr;
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__wsum sum = 0;
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int i;
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u16 pa;
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union {
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struct {
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u8 ph_src[16];
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u8 ph_dst[16];
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u32 ph_len;
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u8 ph_zero[3];
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u8 ph_nxt;
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} ph __packed;
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u16 pa[20];
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} pseudo_header;
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memset(&pseudo_header, 0, sizeof(pseudo_header));
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memcpy(&pseudo_header.ph.ph_src, &ipv6->saddr.in6_u.u6_addr8, 16);
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memcpy(&pseudo_header.ph.ph_dst, &ipv6->daddr.in6_u.u6_addr8, 16);
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pseudo_header.ph.ph_len = be16_to_cpu(ipv6->payload_len);
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pseudo_header.ph.ph_nxt = ipv6->nexthdr;
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w = (u16 *)&pseudo_header;
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for (i = 0; i < ARRAY_SIZE(pseudo_header.pa); i++) {
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pa = pseudo_header.pa[i];
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sum = csum_add(sum, csum_unfold((__force __sum16)pa));
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}
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w = ptr;
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while (len > 1) {
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sum = csum_add(sum, csum_unfold((__force __sum16)*w++));
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len -= 2;
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}
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return csum_fold(sum);
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}
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static int gdm_lte_emulate_ndp(struct sk_buff *skb_in, u32 nic_type)
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{
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struct nic *nic = netdev_priv(skb_in->dev);
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struct sk_buff *skb_out;
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struct ethhdr eth;
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struct vlan_ethhdr vlan_eth;
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struct neighbour_advertisement {
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u8 target_address[16];
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u8 type;
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u8 length;
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u8 link_layer_address[6];
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};
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struct neighbour_advertisement na;
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struct neighbour_solicitation {
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u8 target_address[16];
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};
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struct neighbour_solicitation *ns;
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struct ipv6hdr *ipv6_in;
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struct ipv6hdr ipv6_out;
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struct icmp6hdr *icmp6_in;
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struct icmp6hdr icmp6_out;
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void *mac_header_data;
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u32 mac_header_len;
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/* Format the mac header so that it can be put to skb */
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if (ntohs(((struct ethhdr *)skb_in->data)->h_proto) == ETH_P_8021Q) {
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memcpy(&vlan_eth, skb_in->data, sizeof(struct vlan_ethhdr));
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if (ntohs(vlan_eth.h_vlan_encapsulated_proto) != ETH_P_IPV6)
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return -EPROTONOSUPPORT;
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mac_header_data = &vlan_eth;
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mac_header_len = VLAN_ETH_HLEN;
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} else {
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memcpy(ð, skb_in->data, sizeof(struct ethhdr));
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if (ntohs(eth.h_proto) != ETH_P_IPV6)
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return -EPROTONOSUPPORT;
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mac_header_data = ð
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mac_header_len = ETH_HLEN;
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}
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/* Check if this is IPv6 ICMP packet */
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ipv6_in = (struct ipv6hdr *)(skb_in->data + mac_header_len);
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if (ipv6_in->version != 6 || ipv6_in->nexthdr != IPPROTO_ICMPV6)
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return -EPROTONOSUPPORT;
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/* Check if this is NDP packet */
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icmp6_in = (struct icmp6hdr *)(skb_in->data + mac_header_len +
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sizeof(struct ipv6hdr));
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if (icmp6_in->icmp6_type == NDISC_ROUTER_SOLICITATION) { /* Check RS */
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return -EPROTONOSUPPORT;
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} else if (icmp6_in->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) {
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/* Check NS */
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u8 icmp_na[sizeof(struct icmp6hdr) +
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sizeof(struct neighbour_advertisement)];
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u8 zero_addr8[16] = {0,};
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if (memcmp(ipv6_in->saddr.in6_u.u6_addr8, zero_addr8, 16) == 0)
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/* Duplicate Address Detection: Source IP is all zero */
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return 0;
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icmp6_out.icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT;
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icmp6_out.icmp6_code = 0;
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icmp6_out.icmp6_cksum = 0;
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/* R=0, S=1, O=1 */
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icmp6_out.icmp6_dataun.un_data32[0] = htonl(0x60000000);
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ns = (struct neighbour_solicitation *)
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(skb_in->data + mac_header_len +
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sizeof(struct ipv6hdr) + sizeof(struct icmp6hdr));
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memcpy(&na.target_address, ns->target_address, 16);
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na.type = 0x02;
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na.length = 1;
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na.link_layer_address[0] = 0x00;
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na.link_layer_address[1] = 0x0a;
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na.link_layer_address[2] = 0x3b;
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na.link_layer_address[3] = 0xaf;
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na.link_layer_address[4] = 0x63;
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na.link_layer_address[5] = 0xc7;
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memcpy(&ipv6_out, ipv6_in, sizeof(struct ipv6hdr));
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memcpy(ipv6_out.saddr.in6_u.u6_addr8, &na.target_address, 16);
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memcpy(ipv6_out.daddr.in6_u.u6_addr8,
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ipv6_in->saddr.in6_u.u6_addr8, 16);
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ipv6_out.payload_len = htons(sizeof(struct icmp6hdr) +
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sizeof(struct neighbour_advertisement));
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memcpy(icmp_na, &icmp6_out, sizeof(struct icmp6hdr));
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memcpy(icmp_na + sizeof(struct icmp6hdr), &na,
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sizeof(struct neighbour_advertisement));
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icmp6_out.icmp6_cksum = icmp6_checksum(&ipv6_out,
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(u16 *)icmp_na,
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sizeof(icmp_na));
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} else {
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return -EINVAL;
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}
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/* Fill the destination mac with source mac of the received packet */
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memcpy(mac_header_data, mac_header_data + ETH_ALEN, ETH_ALEN);
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/* Fill the source mac with nic's source mac */
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memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
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/* Alloc skb and reserve align */
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skb_out = dev_alloc_skb(skb_in->len);
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if (!skb_out)
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return -ENOMEM;
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skb_reserve(skb_out, NET_IP_ALIGN);
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skb_put_data(skb_out, mac_header_data, mac_header_len);
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skb_put_data(skb_out, &ipv6_out, sizeof(struct ipv6hdr));
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skb_put_data(skb_out, &icmp6_out, sizeof(struct icmp6hdr));
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skb_put_data(skb_out, &na, sizeof(struct neighbour_advertisement));
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skb_out->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
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skb_out->dev = skb_in->dev;
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skb_reset_mac_header(skb_out);
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skb_pull(skb_out, ETH_HLEN);
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gdm_lte_rx(skb_out, nic, nic_type);
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return 0;
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}
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static s32 gdm_lte_tx_nic_type(struct net_device *dev, struct sk_buff *skb)
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{
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struct nic *nic = netdev_priv(dev);
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struct ethhdr *eth;
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struct vlan_ethhdr *vlan_eth;
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struct iphdr *ip;
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struct ipv6hdr *ipv6;
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int mac_proto;
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void *network_data;
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u32 nic_type;
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/* NIC TYPE is based on the nic_id of this net_device */
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nic_type = 0x00000010 | nic->nic_id;
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/* Get ethernet protocol */
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eth = (struct ethhdr *)skb->data;
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if (ntohs(eth->h_proto) == ETH_P_8021Q) {
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vlan_eth = (struct vlan_ethhdr *)skb->data;
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mac_proto = ntohs(vlan_eth->h_vlan_encapsulated_proto);
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network_data = skb->data + VLAN_ETH_HLEN;
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nic_type |= NIC_TYPE_F_VLAN;
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} else {
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mac_proto = ntohs(eth->h_proto);
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network_data = skb->data + ETH_HLEN;
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}
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/* Process packet for nic type */
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switch (mac_proto) {
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case ETH_P_ARP:
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nic_type |= NIC_TYPE_ARP;
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break;
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case ETH_P_IP:
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nic_type |= NIC_TYPE_F_IPV4;
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ip = network_data;
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/* Check DHCPv4 */
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if (ip->protocol == IPPROTO_UDP) {
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struct udphdr *udp =
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network_data + sizeof(struct iphdr);
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if (ntohs(udp->dest) == 67 || ntohs(udp->dest) == 68)
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nic_type |= NIC_TYPE_F_DHCP;
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}
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break;
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case ETH_P_IPV6:
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nic_type |= NIC_TYPE_F_IPV6;
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ipv6 = network_data;
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if (ipv6->nexthdr == IPPROTO_ICMPV6) /* Check NDP request */ {
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struct icmp6hdr *icmp6 =
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network_data + sizeof(struct ipv6hdr);
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if (icmp6->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION)
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nic_type |= NIC_TYPE_ICMPV6;
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} else if (ipv6->nexthdr == IPPROTO_UDP) /* Check DHCPv6 */ {
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struct udphdr *udp =
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network_data + sizeof(struct ipv6hdr);
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if (ntohs(udp->dest) == 546 || ntohs(udp->dest) == 547)
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nic_type |= NIC_TYPE_F_DHCP;
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}
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break;
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default:
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break;
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}
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return nic_type;
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}
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static netdev_tx_t gdm_lte_tx(struct sk_buff *skb, struct net_device *dev)
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{
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struct nic *nic = netdev_priv(dev);
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u32 nic_type;
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void *data_buf;
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int data_len;
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int idx;
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int ret = 0;
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nic_type = gdm_lte_tx_nic_type(dev, skb);
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if (nic_type == 0) {
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netdev_err(dev, "tx - invalid nic_type\n");
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return -EMEDIUMTYPE;
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}
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if (nic_type & NIC_TYPE_ARP) {
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if (gdm_lte_emulate_arp(skb, nic_type) == 0) {
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dev_kfree_skb(skb);
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return 0;
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}
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}
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if (nic_type & NIC_TYPE_ICMPV6) {
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if (gdm_lte_emulate_ndp(skb, nic_type) == 0) {
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dev_kfree_skb(skb);
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return 0;
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}
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}
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/*
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* Need byte shift (that is, remove VLAN tag) if there is one
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* For the case of ARP, this breaks the offset as vlan_ethhdr+4
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* is treated as ethhdr However, it shouldn't be a problem as
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* the response starts from arp_hdr and ethhdr is created by this
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* driver based on the NIC mac
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*/
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if (nic_type & NIC_TYPE_F_VLAN) {
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struct vlan_ethhdr *vlan_eth = (struct vlan_ethhdr *)skb->data;
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nic->vlan_id = ntohs(vlan_eth->h_vlan_TCI) & VLAN_VID_MASK;
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data_buf = skb->data + (VLAN_ETH_HLEN - ETH_HLEN);
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data_len = skb->len - (VLAN_ETH_HLEN - ETH_HLEN);
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} else {
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nic->vlan_id = 0;
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data_buf = skb->data;
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data_len = skb->len;
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}
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/* If it is a ICMPV6 packet, clear all the other bits :
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* for backward compatibility with the firmware
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*/
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if (nic_type & NIC_TYPE_ICMPV6)
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nic_type = NIC_TYPE_ICMPV6;
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/* If it is not a dhcp packet, clear all the flag bits :
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* original NIC, otherwise the special flag (IPVX | DHCP)
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*/
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if (!(nic_type & NIC_TYPE_F_DHCP))
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nic_type &= NIC_TYPE_MASK;
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ret = sscanf(dev->name, "lte%d", &idx);
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if (ret != 1) {
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dev_kfree_skb(skb);
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return -EINVAL;
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}
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ret = nic->phy_dev->send_sdu_func(nic->phy_dev->priv_dev,
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data_buf, data_len,
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nic->pdn_table.dft_eps_id, 0,
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tx_complete, nic, idx,
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nic_type);
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if (ret == TX_NO_BUFFER || ret == TX_NO_SPC) {
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netif_stop_queue(dev);
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if (ret == TX_NO_BUFFER)
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ret = 0;
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else
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ret = -ENOSPC;
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} else if (ret == TX_NO_DEV) {
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ret = -ENODEV;
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}
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/* Updates tx stats */
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if (ret) {
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nic->stats.tx_dropped++;
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} else {
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nic->stats.tx_packets++;
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nic->stats.tx_bytes += data_len;
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}
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dev_kfree_skb(skb);
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return 0;
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}
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static struct net_device_stats *gdm_lte_stats(struct net_device *dev)
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{
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struct nic *nic = netdev_priv(dev);
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return &nic->stats;
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}
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static int gdm_lte_event_send(struct net_device *dev, char *buf, int len)
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{
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struct phy_dev *phy_dev = ((struct nic *)netdev_priv(dev))->phy_dev;
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struct hci_packet *hci = (struct hci_packet *)buf;
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int length;
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int idx;
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int ret;
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ret = sscanf(dev->name, "lte%d", &idx);
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if (ret != 1)
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return -EINVAL;
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length = gdm_dev16_to_cpu(phy_dev->get_endian(phy_dev->priv_dev),
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hci->len) + HCI_HEADER_SIZE;
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return netlink_send(lte_event.sock, idx, 0, buf, length);
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}
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static void gdm_lte_event_rcv(struct net_device *dev, u16 type,
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void *msg, int len)
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{
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struct nic *nic = netdev_priv(dev);
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nic->phy_dev->send_hci_func(nic->phy_dev->priv_dev, msg, len, NULL,
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NULL);
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}
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int gdm_lte_event_init(void)
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{
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if (lte_event.ref_cnt == 0)
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lte_event.sock = netlink_init(NETLINK_LTE, gdm_lte_event_rcv);
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if (lte_event.sock) {
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lte_event.ref_cnt++;
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return 0;
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}
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pr_err("event init failed\n");
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return -ENODATA;
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}
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void gdm_lte_event_exit(void)
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{
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if (lte_event.sock && --lte_event.ref_cnt == 0) {
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sock_release(lte_event.sock->sk_socket);
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lte_event.sock = NULL;
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}
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}
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static int find_dev_index(u32 nic_type)
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{
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u8 index;
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index = (u8)(nic_type & 0x0000000f);
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if (index >= MAX_NIC_TYPE)
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return -EINVAL;
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return index;
|
}
|
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static void gdm_lte_netif_rx(struct net_device *dev, char *buf,
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int len, int flagged_nic_type)
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{
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u32 nic_type;
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struct nic *nic;
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struct sk_buff *skb;
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struct ethhdr eth;
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struct vlan_ethhdr vlan_eth;
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void *mac_header_data;
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u32 mac_header_len;
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char ip_version = 0;
|
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nic_type = flagged_nic_type & NIC_TYPE_MASK;
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nic = netdev_priv(dev);
|
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if (flagged_nic_type & NIC_TYPE_F_DHCP) {
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/* Change the destination mac address
|
* with the one requested the IP
|
*/
|
if (flagged_nic_type & NIC_TYPE_F_IPV4) {
|
struct dhcp_packet {
|
u8 op; /* BOOTREQUEST or BOOTREPLY */
|
u8 htype; /* hardware address type.
|
* 1 = 10mb ethernet
|
*/
|
u8 hlen; /* hardware address length */
|
u8 hops; /* used by relay agents only */
|
u32 xid; /* unique id */
|
u16 secs; /* elapsed since client began
|
* acquisition/renewal
|
*/
|
u16 flags; /* only one flag so far: */
|
#define BROADCAST_FLAG 0x8000
|
/* "I need broadcast replies" */
|
u32 ciaddr; /* client IP (if client is in
|
* BOUND, RENEW or REBINDING state)
|
*/
|
u32 yiaddr; /* 'your' (client) IP address */
|
/* IP address of next server to use in
|
* bootstrap, returned in DHCPOFFER,
|
* DHCPACK by server
|
*/
|
u32 siaddr_nip;
|
u32 gateway_nip; /* relay agent IP address */
|
u8 chaddr[16]; /* link-layer client hardware
|
* address (MAC)
|
*/
|
u8 sname[64]; /* server host name (ASCIZ) */
|
u8 file[128]; /* boot file name (ASCIZ) */
|
u32 cookie; /* fixed first four option
|
* bytes (99,130,83,99 dec)
|
*/
|
} __packed;
|
int offset = sizeof(struct iphdr) +
|
sizeof(struct udphdr) +
|
offsetof(struct dhcp_packet, chaddr);
|
if (offset + ETH_ALEN > len)
|
return;
|
ether_addr_copy(nic->dest_mac_addr, buf + offset);
|
}
|
}
|
|
if (nic->vlan_id > 0) {
|
mac_header_data = (void *)&vlan_eth;
|
mac_header_len = VLAN_ETH_HLEN;
|
} else {
|
mac_header_data = (void *)ð
|
mac_header_len = ETH_HLEN;
|
}
|
|
/* Format the data so that it can be put to skb */
|
ether_addr_copy(mac_header_data, nic->dest_mac_addr);
|
memcpy(mac_header_data + ETH_ALEN, nic->src_mac_addr, ETH_ALEN);
|
|
vlan_eth.h_vlan_TCI = htons(nic->vlan_id);
|
vlan_eth.h_vlan_proto = htons(ETH_P_8021Q);
|
|
if (nic_type == NIC_TYPE_ARP) {
|
/* Should be response: Only happens because
|
* there was a request from the host
|
*/
|
eth.h_proto = htons(ETH_P_ARP);
|
vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_ARP);
|
} else {
|
ip_version = buf[0] >> 4;
|
if (ip_version == IP_VERSION_4) {
|
eth.h_proto = htons(ETH_P_IP);
|
vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IP);
|
} else if (ip_version == IP_VERSION_6) {
|
eth.h_proto = htons(ETH_P_IPV6);
|
vlan_eth.h_vlan_encapsulated_proto = htons(ETH_P_IPV6);
|
} else {
|
netdev_err(dev, "Unknown IP version %d\n", ip_version);
|
return;
|
}
|
}
|
|
/* Alloc skb and reserve align */
|
skb = dev_alloc_skb(len + mac_header_len + NET_IP_ALIGN);
|
if (!skb)
|
return;
|
skb_reserve(skb, NET_IP_ALIGN);
|
|
skb_put_data(skb, mac_header_data, mac_header_len);
|
skb_put_data(skb, buf, len);
|
|
skb->protocol = ((struct ethhdr *)mac_header_data)->h_proto;
|
skb->dev = dev;
|
skb_reset_mac_header(skb);
|
skb_pull(skb, ETH_HLEN);
|
|
gdm_lte_rx(skb, nic, nic_type);
|
}
|
|
static void gdm_lte_multi_sdu_pkt(struct phy_dev *phy_dev, char *buf, int len)
|
{
|
struct net_device *dev;
|
struct multi_sdu *multi_sdu = (struct multi_sdu *)buf;
|
struct sdu *sdu = NULL;
|
u8 endian = phy_dev->get_endian(phy_dev->priv_dev);
|
u8 *data = (u8 *)multi_sdu->data;
|
int copied;
|
u16 i = 0;
|
u16 num_packet;
|
u16 hci_len;
|
u16 cmd_evt;
|
u32 nic_type;
|
int index;
|
|
hci_len = gdm_dev16_to_cpu(endian, multi_sdu->len);
|
num_packet = gdm_dev16_to_cpu(endian, multi_sdu->num_packet);
|
|
for (i = 0; i < num_packet; i++) {
|
copied = data - multi_sdu->data;
|
if (len < copied + sizeof(*sdu)) {
|
pr_err("rx prevent buffer overflow");
|
return;
|
}
|
|
sdu = (struct sdu *)data;
|
|
cmd_evt = gdm_dev16_to_cpu(endian, sdu->cmd_evt);
|
hci_len = gdm_dev16_to_cpu(endian, sdu->len);
|
nic_type = gdm_dev32_to_cpu(endian, sdu->nic_type);
|
|
if (cmd_evt != LTE_RX_SDU) {
|
pr_err("rx sdu wrong hci %04x\n", cmd_evt);
|
return;
|
}
|
if (hci_len < 12 ||
|
len < copied + sizeof(*sdu) + (hci_len - 12)) {
|
pr_err("rx sdu invalid len %d\n", hci_len);
|
return;
|
}
|
|
index = find_dev_index(nic_type);
|
if (index < 0) {
|
pr_err("rx sdu invalid nic_type :%x\n", nic_type);
|
return;
|
}
|
dev = phy_dev->dev[index];
|
gdm_lte_netif_rx(dev, (char *)sdu->data,
|
(int)(hci_len - 12), nic_type);
|
|
data += ((hci_len + 3) & 0xfffc) + HCI_HEADER_SIZE;
|
}
|
}
|
|
static void gdm_lte_pdn_table(struct net_device *dev, char *buf, int len)
|
{
|
struct nic *nic = netdev_priv(dev);
|
struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf;
|
u8 ed = nic->phy_dev->get_endian(nic->phy_dev->priv_dev);
|
|
if (!pdn_table->activate) {
|
memset(&nic->pdn_table, 0x00, sizeof(struct pdn_table));
|
netdev_info(dev, "pdn deactivated\n");
|
|
return;
|
}
|
|
nic->pdn_table.activate = pdn_table->activate;
|
nic->pdn_table.dft_eps_id = gdm_dev32_to_cpu(ed, pdn_table->dft_eps_id);
|
nic->pdn_table.nic_type = gdm_dev32_to_cpu(ed, pdn_table->nic_type);
|
|
netdev_info(dev, "pdn activated, nic_type=0x%x\n",
|
nic->pdn_table.nic_type);
|
}
|
|
static int gdm_lte_receive_pkt(struct phy_dev *phy_dev, char *buf, int len)
|
{
|
struct hci_packet *hci = (struct hci_packet *)buf;
|
struct hci_pdn_table_ind *pdn_table = (struct hci_pdn_table_ind *)buf;
|
struct sdu *sdu;
|
struct net_device *dev;
|
u8 endian = phy_dev->get_endian(phy_dev->priv_dev);
|
int ret = 0;
|
u16 cmd_evt;
|
u32 nic_type;
|
int index;
|
|
if (!len)
|
return ret;
|
|
cmd_evt = gdm_dev16_to_cpu(endian, hci->cmd_evt);
|
|
dev = phy_dev->dev[0];
|
if (!dev)
|
return 0;
|
|
switch (cmd_evt) {
|
case LTE_RX_SDU:
|
sdu = (struct sdu *)hci->data;
|
nic_type = gdm_dev32_to_cpu(endian, sdu->nic_type);
|
index = find_dev_index(nic_type);
|
if (index < 0)
|
return index;
|
dev = phy_dev->dev[index];
|
gdm_lte_netif_rx(dev, hci->data, len, nic_type);
|
break;
|
case LTE_RX_MULTI_SDU:
|
gdm_lte_multi_sdu_pkt(phy_dev, buf, len);
|
break;
|
case LTE_LINK_ON_OFF_INDICATION:
|
netdev_info(dev, "link %s\n",
|
((struct hci_connect_ind *)buf)->connect
|
? "on" : "off");
|
break;
|
case LTE_PDN_TABLE_IND:
|
pdn_table = (struct hci_pdn_table_ind *)buf;
|
nic_type = gdm_dev32_to_cpu(endian, pdn_table->nic_type);
|
index = find_dev_index(nic_type);
|
if (index < 0)
|
return index;
|
dev = phy_dev->dev[index];
|
gdm_lte_pdn_table(dev, buf, len);
|
/* Fall through */
|
default:
|
ret = gdm_lte_event_send(dev, buf, len);
|
break;
|
}
|
|
return ret;
|
}
|
|
static int rx_complete(void *arg, void *data, int len, int context)
|
{
|
struct phy_dev *phy_dev = arg;
|
|
return gdm_lte_receive_pkt(phy_dev, data, len);
|
}
|
|
void start_rx_proc(struct phy_dev *phy_dev)
|
{
|
int i;
|
|
for (i = 0; i < MAX_RX_SUBMIT_COUNT; i++)
|
phy_dev->rcv_func(phy_dev->priv_dev,
|
rx_complete, phy_dev, USB_COMPLETE);
|
}
|
|
static const struct net_device_ops gdm_netdev_ops = {
|
.ndo_open = gdm_lte_open,
|
.ndo_stop = gdm_lte_close,
|
.ndo_set_config = gdm_lte_set_config,
|
.ndo_start_xmit = gdm_lte_tx,
|
.ndo_get_stats = gdm_lte_stats,
|
};
|
|
static u8 gdm_lte_macaddr[ETH_ALEN] = {0x00, 0x0a, 0x3b, 0x00, 0x00, 0x00};
|
|
static void form_mac_address(u8 *dev_addr, u8 *nic_src, u8 *nic_dest,
|
u8 *mac_address, u8 index)
|
{
|
/* Form the dev_addr */
|
if (!mac_address)
|
ether_addr_copy(dev_addr, gdm_lte_macaddr);
|
else
|
ether_addr_copy(dev_addr, mac_address);
|
|
/* The last byte of the mac address
|
* should be less than or equal to 0xFC
|
*/
|
dev_addr[ETH_ALEN - 1] += index;
|
|
/* Create random nic src and copy the first
|
* 3 bytes to be the same as dev_addr
|
*/
|
eth_random_addr(nic_src);
|
memcpy(nic_src, dev_addr, 3);
|
|
/* Copy the nic_dest from dev_addr*/
|
ether_addr_copy(nic_dest, dev_addr);
|
}
|
|
static void validate_mac_address(u8 *mac_address)
|
{
|
/* if zero address or multicast bit set, restore the default value */
|
if (is_zero_ether_addr(mac_address) || (mac_address[0] & 0x01)) {
|
pr_err("MAC invalid, restoring default\n");
|
memcpy(mac_address, gdm_lte_macaddr, 6);
|
}
|
}
|
|
int register_lte_device(struct phy_dev *phy_dev,
|
struct device *dev, u8 *mac_address)
|
{
|
struct nic *nic;
|
struct net_device *net;
|
char pdn_dev_name[16];
|
int ret = 0;
|
u8 index;
|
|
validate_mac_address(mac_address);
|
|
for (index = 0; index < MAX_NIC_TYPE; index++) {
|
/* Create device name lteXpdnX */
|
sprintf(pdn_dev_name, "lte%%dpdn%d", index);
|
|
/* Allocate netdev */
|
net = alloc_netdev(sizeof(struct nic), pdn_dev_name,
|
NET_NAME_UNKNOWN, ether_setup);
|
if (!net) {
|
pr_err("alloc_netdev failed\n");
|
ret = -ENOMEM;
|
goto err;
|
}
|
net->netdev_ops = &gdm_netdev_ops;
|
net->flags &= ~IFF_MULTICAST;
|
net->mtu = DEFAULT_MTU_SIZE;
|
|
nic = netdev_priv(net);
|
memset(nic, 0, sizeof(struct nic));
|
nic->netdev = net;
|
nic->phy_dev = phy_dev;
|
nic->nic_id = index;
|
|
form_mac_address(net->dev_addr,
|
nic->src_mac_addr,
|
nic->dest_mac_addr,
|
mac_address,
|
index);
|
|
SET_NETDEV_DEV(net, dev);
|
SET_NETDEV_DEVTYPE(net, &wwan_type);
|
|
ret = register_netdev(net);
|
if (ret)
|
goto err;
|
|
netif_carrier_on(net);
|
|
phy_dev->dev[index] = net;
|
}
|
|
return 0;
|
|
err:
|
unregister_lte_device(phy_dev);
|
|
return ret;
|
}
|
|
void unregister_lte_device(struct phy_dev *phy_dev)
|
{
|
struct net_device *net;
|
int index;
|
|
for (index = 0; index < MAX_NIC_TYPE; index++) {
|
net = phy_dev->dev[index];
|
if (!net)
|
continue;
|
|
unregister_netdev(net);
|
free_netdev(net);
|
}
|
}
|
