From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- .../wireless/bcmdhd.1.28.23.x.cn/wl_linux_mon.c | 422 +++++++++++++++++++++ 1 file changed, 422 insertions(+) create mode 100755 drivers/net/wireless/bcmdhd.1.28.23.x.cn/wl_linux_mon.c (limited to 'drivers/net/wireless/bcmdhd.1.28.23.x.cn/wl_linux_mon.c') diff --git a/drivers/net/wireless/bcmdhd.1.28.23.x.cn/wl_linux_mon.c b/drivers/net/wireless/bcmdhd.1.28.23.x.cn/wl_linux_mon.c new file mode 100755 index 00000000..af258632 --- /dev/null +++ b/drivers/net/wireless/bcmdhd.1.28.23.x.cn/wl_linux_mon.c @@ -0,0 +1,422 @@ +/* + * Broadcom Dongle Host Driver (DHD), Linux monitor network interface + * + * Copyright (C) 1999-2012, Broadcom Corporation + * + * Unless you and Broadcom execute a separate written software license + * agreement governing use of this software, this software is licensed to you + * under the terms of the GNU General Public License version 2 (the "GPL"), + * available at http://www.broadcom.com/licenses/GPLv2.php, with the + * following added to such license: + * + * As a special exception, the copyright holders of this software give you + * permission to link this software with independent modules, and to copy and + * distribute the resulting executable under terms of your choice, provided that + * you also meet, for each linked independent module, the terms and conditions of + * the license of that module. An independent module is a module which is not + * derived from this software. The special exception does not apply to any + * modifications of the software. + * + * Notwithstanding the above, under no circumstances may you combine this + * software in any way with any other Broadcom software provided under a license + * other than the GPL, without Broadcom's express prior written consent. + * + * $Id: dhd_linux_mon.c 280623 2011-08-30 14:49:39Z $ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +typedef enum monitor_states +{ + MONITOR_STATE_DEINIT = 0x0, + MONITOR_STATE_INIT = 0x1, + MONITOR_STATE_INTERFACE_ADDED = 0x2, + MONITOR_STATE_INTERFACE_DELETED = 0x4 +} monitor_states_t; +int dhd_add_monitor(char *name, struct net_device **new_ndev); +extern int dhd_start_xmit(struct sk_buff *skb, struct net_device *net); +int dhd_del_monitor(struct net_device *ndev); +int dhd_monitor_init(void *dhd_pub); +int dhd_monitor_uninit(void); + +/** + * Local declarations and defintions (not exposed) + */ +#ifndef DHD_MAX_IFS +#define DHD_MAX_IFS 16 +#endif +#define MON_PRINT(format, ...) printk("DHD-MON: %s " format, __func__, ##__VA_ARGS__) +#define MON_TRACE MON_PRINT + +typedef struct monitor_interface { + int radiotap_enabled; + struct net_device* real_ndev; /* The real interface that the monitor is on */ + struct net_device* mon_ndev; +} monitor_interface; + +typedef struct dhd_linux_monitor { + void *dhd_pub; + monitor_states_t monitor_state; + monitor_interface mon_if[DHD_MAX_IFS]; + struct mutex lock; /* lock to protect mon_if */ +} dhd_linux_monitor_t; + +static dhd_linux_monitor_t g_monitor; + +static struct net_device* lookup_real_netdev(char *name); +static monitor_interface* ndev_to_monif(struct net_device *ndev); +static int dhd_mon_if_open(struct net_device *ndev); +static int dhd_mon_if_stop(struct net_device *ndev); +static int dhd_mon_if_subif_start_xmit(struct sk_buff *skb, struct net_device *ndev); +static void dhd_mon_if_set_multicast_list(struct net_device *ndev); +static int dhd_mon_if_change_mac(struct net_device *ndev, void *addr); + +static const struct net_device_ops dhd_mon_if_ops = { + .ndo_open = dhd_mon_if_open, + .ndo_stop = dhd_mon_if_stop, + .ndo_start_xmit = dhd_mon_if_subif_start_xmit, +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)) + .ndo_set_rx_mode = dhd_mon_if_set_multicast_list, +#else + .ndo_set_multicast_list = dhd_mon_if_set_multicast_list, +#endif + .ndo_set_mac_address = dhd_mon_if_change_mac, +}; + +/** + * Local static function defintions + */ + +/* Look up dhd's net device table to find a match (e.g. interface "eth0" is a match for "mon.eth0" + * "p2p-eth0-0" is a match for "mon.p2p-eth0-0") + */ +static struct net_device* lookup_real_netdev(char *name) +{ + struct net_device *ndev_found = NULL; + + int i; + int len = 0; + int last_name_len = 0; + struct net_device *ndev; + + /* We need to find interface "p2p-p2p-0" corresponding to monitor interface "mon-p2p-0", + * Once mon iface name reaches IFNAMSIZ, it is reset to p2p0-0 and corresponding mon + * iface would be mon-p2p0-0. + */ + for (i = 0; i < DHD_MAX_IFS; i++) { + ndev = dhd_idx2net(g_monitor.dhd_pub, i); + + /* Skip "p2p" and look for "-p2p0-x" in monitor interface name. If it + * it matches, then this netdev is the corresponding real_netdev. + */ + if (ndev && strstr(ndev->name, "p2p-p2p0")) { + len = strlen("p2p"); + } else { + /* if p2p- is not present, then the IFNAMSIZ have reached and name + * would have got reset. In this casse,look for p2p0-x in mon-p2p0-x + */ + len = 0; + } + if (ndev && strstr(name, (ndev->name + len))) { + if (strlen(ndev->name) > last_name_len) { + ndev_found = ndev; + last_name_len = strlen(ndev->name); + } + } + } + + return ndev_found; +} + +static monitor_interface* ndev_to_monif(struct net_device *ndev) +{ + int i; + + for (i = 0; i < DHD_MAX_IFS; i++) { + if (g_monitor.mon_if[i].mon_ndev == ndev) + return &g_monitor.mon_if[i]; + } + + return NULL; +} + +static int dhd_mon_if_open(struct net_device *ndev) +{ + int ret = 0; + + MON_PRINT("enter\n"); + return ret; +} + +static int dhd_mon_if_stop(struct net_device *ndev) +{ + int ret = 0; + + MON_PRINT("enter\n"); + return ret; +} + +static int dhd_mon_if_subif_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + int ret = 0; + int rtap_len; + int qos_len = 0; + int dot11_hdr_len = 24; + int snap_len = 6; + unsigned char *pdata; + unsigned short frame_ctl; + unsigned char src_mac_addr[6]; + unsigned char dst_mac_addr[6]; + struct ieee80211_hdr *dot11_hdr; + struct ieee80211_radiotap_header *rtap_hdr; + monitor_interface* mon_if; + + MON_PRINT("enter\n"); + + mon_if = ndev_to_monif(ndev); + if (mon_if == NULL || mon_if->real_ndev == NULL) { + MON_PRINT(" cannot find matched net dev, skip the packet\n"); + goto fail; + } + + if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) + goto fail; + + rtap_hdr = (struct ieee80211_radiotap_header *)skb->data; + if (unlikely(rtap_hdr->it_version)) + goto fail; + + rtap_len = ieee80211_get_radiotap_len(skb->data); + if (unlikely(skb->len < rtap_len)) + goto fail; + + MON_PRINT("radiotap len (should be 14): %d\n", rtap_len); + + /* Skip the ratio tap header */ + skb_pull(skb, rtap_len); + + dot11_hdr = (struct ieee80211_hdr *)skb->data; + frame_ctl = le16_to_cpu(dot11_hdr->frame_control); + /* Check if the QoS bit is set */ + if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) { + /* Check if this ia a Wireless Distribution System (WDS) frame + * which has 4 MAC addresses + */ + if (dot11_hdr->frame_control & 0x0080) + qos_len = 2; + if ((dot11_hdr->frame_control & 0x0300) == 0x0300) + dot11_hdr_len += 6; + + memcpy(dst_mac_addr, dot11_hdr->addr1, sizeof(dst_mac_addr)); + memcpy(src_mac_addr, dot11_hdr->addr2, sizeof(src_mac_addr)); + + /* Skip the 802.11 header, QoS (if any) and SNAP, but leave spaces for + * for two MAC addresses + */ + skb_pull(skb, dot11_hdr_len + qos_len + snap_len - sizeof(src_mac_addr) * 2); + pdata = (unsigned char*)skb->data; + memcpy(pdata, dst_mac_addr, sizeof(dst_mac_addr)); + memcpy(pdata + sizeof(dst_mac_addr), src_mac_addr, sizeof(src_mac_addr)); + PKTSETPRIO(skb, 0); + + MON_PRINT("if name: %s, matched if name %s\n", ndev->name, mon_if->real_ndev->name); + + /* Use the real net device to transmit the packet */ + ret = dhd_start_xmit(skb, mon_if->real_ndev); + + return ret; + } +fail: + dev_kfree_skb(skb); + return 0; +} + +static void dhd_mon_if_set_multicast_list(struct net_device *ndev) +{ + monitor_interface* mon_if; + + mon_if = ndev_to_monif(ndev); + if (mon_if == NULL || mon_if->real_ndev == NULL) { + MON_PRINT(" cannot find matched net dev, skip the packet\n"); + } else { + MON_PRINT("enter, if name: %s, matched if name %s\n", + ndev->name, mon_if->real_ndev->name); + } +} + +static int dhd_mon_if_change_mac(struct net_device *ndev, void *addr) +{ + int ret = 0; + monitor_interface* mon_if; + + mon_if = ndev_to_monif(ndev); + if (mon_if == NULL || mon_if->real_ndev == NULL) { + MON_PRINT(" cannot find matched net dev, skip the packet\n"); + } else { + MON_PRINT("enter, if name: %s, matched if name %s\n", + ndev->name, mon_if->real_ndev->name); + } + return ret; +} + +/** + * Global function definitions (declared in dhd_linux_mon.h) + */ + +int dhd_add_monitor(char *name, struct net_device **new_ndev) +{ + int i; + int idx = -1; + int ret = 0; + struct net_device* ndev = NULL; + dhd_linux_monitor_t **dhd_mon; + + mutex_lock(&g_monitor.lock); + + MON_TRACE("enter, if name: %s\n", name); + if (!name || !new_ndev) { + MON_PRINT("invalid parameters\n"); + ret = -EINVAL; + goto out; + } + + /* + * Find a vacancy + */ + for (i = 0; i < DHD_MAX_IFS; i++) + if (g_monitor.mon_if[i].mon_ndev == NULL) { + idx = i; + break; + } + if (idx == -1) { + MON_PRINT("exceeds maximum interfaces\n"); + ret = -EFAULT; + goto out; + } + + ndev = alloc_etherdev(sizeof(dhd_linux_monitor_t*)); + if (!ndev) { + MON_PRINT("failed to allocate memory\n"); + ret = -ENOMEM; + goto out; + } + + ndev->type = ARPHRD_IEEE80211_RADIOTAP; + strncpy(ndev->name, name, IFNAMSIZ); + ndev->name[IFNAMSIZ - 1] = 0; + ndev->netdev_ops = &dhd_mon_if_ops; + + ret = register_netdevice(ndev); + if (ret) { + MON_PRINT(" register_netdevice failed (%d)\n", ret); + goto out; + } + + *new_ndev = ndev; + g_monitor.mon_if[idx].radiotap_enabled = TRUE; + g_monitor.mon_if[idx].mon_ndev = ndev; + g_monitor.mon_if[idx].real_ndev = lookup_real_netdev(name); + dhd_mon = (dhd_linux_monitor_t **)netdev_priv(ndev); + *dhd_mon = &g_monitor; + g_monitor.monitor_state = MONITOR_STATE_INTERFACE_ADDED; + MON_PRINT("net device returned: 0x%p\n", ndev); + MON_PRINT("found a matched net device, name %s\n", g_monitor.mon_if[idx].real_ndev->name); + +out: + if (ret && ndev) + free_netdev(ndev); + + mutex_unlock(&g_monitor.lock); + return ret; + +} + +int dhd_del_monitor(struct net_device *ndev) +{ + int i; + bool rollback_lock = false; + if (!ndev) + return -EINVAL; + mutex_lock(&g_monitor.lock); + for (i = 0; i < DHD_MAX_IFS; i++) { + if (g_monitor.mon_if[i].mon_ndev == ndev || + g_monitor.mon_if[i].real_ndev == ndev) { + g_monitor.mon_if[i].real_ndev = NULL; + if (rtnl_is_locked()) { + rtnl_unlock(); + rollback_lock = true; + } + unregister_netdev(g_monitor.mon_if[i].mon_ndev); + free_netdev(g_monitor.mon_if[i].mon_ndev); + g_monitor.mon_if[i].mon_ndev = NULL; + g_monitor.monitor_state = MONITOR_STATE_INTERFACE_DELETED; + break; + } + } + if (rollback_lock) { + rtnl_lock(); + rollback_lock = false; + } + + if (g_monitor.monitor_state != + MONITOR_STATE_INTERFACE_DELETED) + MON_PRINT("interface not found in monitor IF array, is this a monitor IF? 0x%p\n", + ndev); + mutex_unlock(&g_monitor.lock); + + return 0; +} + +int dhd_monitor_init(void *dhd_pub) +{ + if (g_monitor.monitor_state == MONITOR_STATE_DEINIT) { + g_monitor.dhd_pub = dhd_pub; + mutex_init(&g_monitor.lock); + g_monitor.monitor_state = MONITOR_STATE_INIT; + } + return 0; +} + +int dhd_monitor_uninit(void) +{ + int i; + struct net_device *ndev; + bool rollback_lock = false; + mutex_lock(&g_monitor.lock); + if (g_monitor.monitor_state != MONITOR_STATE_DEINIT) { + for (i = 0; i < DHD_MAX_IFS; i++) { + ndev = g_monitor.mon_if[i].mon_ndev; + if (ndev) { + if (rtnl_is_locked()) { + rtnl_unlock(); + rollback_lock = true; + } + unregister_netdev(ndev); + free_netdev(ndev); + g_monitor.mon_if[i].real_ndev = NULL; + g_monitor.mon_if[i].mon_ndev = NULL; + if (rollback_lock) { + rtnl_lock(); + rollback_lock = false; + } + } + } + g_monitor.monitor_state = MONITOR_STATE_DEINIT; + } + mutex_unlock(&g_monitor.lock); + return 0; +} -- cgit