diff options
| author |   Thibaut Robert <thibaut.robert@gmail.com> | 2018-06-19 20:44:19 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-28 21:54:03 +0900 |
| commit | 8c05c98b1a2f0bc8a8fbcc0746adedea01311040 (patch) | |
| tree | fcc95d3758ff9ac79f80257abebd62477ef8bac1 /drivers/staging/wilc1000 | |
| parent | staging: mt7621-gpio: avoid use banks in device tree (diff) | |
| download | linux-dev-8c05c98b1a2f0bc8a8fbcc0746adedea01311040.tar.xz linux-dev-8c05c98b1a2f0bc8a8fbcc0746adedea01311040.zip | |
staging: wilc1000: Use common structs to parse ip packets
Use structs ethhdr, iphdr and tcphdr instead of manual parsing in
tcp_process.
This commit fix handling of ip packets containing options.
It also fixes the following sparse warning:
drivers/staging/wilc1000//wilc_wlan.c:201:19: warning: cast to restricted __be16
Signed-off-by: Thibaut Robert <thibaut.robert@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/wilc1000')
| -rw-r--r-- | drivers/staging/wilc1000/wilc_wlan.c | 43 |
1 files changed, 15 insertions, 28 deletions
diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c index 55755d7fbb30..85af36595e69 100644 --- a/drivers/staging/wilc1000/wilc_wlan.c +++ b/drivers/staging/wilc1000/wilc_wlan.c @@ -1,4 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 +#include <linux/if_ether.h> +#include <linux/ip.h> #include "wilc_wfi_netdevice.h" #include "wilc_wlan_cfg.h" @@ -150,9 +152,8 @@ static inline int add_tcp_pending_ack(u32 ack, u32 session_index, static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe) { - u8 *eth_hdr_ptr; - u8 *buffer = tqe->buffer; - unsigned short h_proto; + void *buffer = tqe->buffer; + const struct ethhdr *eth_hdr_ptr = buffer; int i; unsigned long flags; struct wilc_vif *vif; @@ -163,37 +164,23 @@ static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe) spin_lock_irqsave(&wilc->txq_spinlock, flags); - eth_hdr_ptr = &buffer[0]; - h_proto = ntohs(*((unsigned short *)ð_hdr_ptr[12])); - if (h_proto == ETH_P_IP) { - u8 *ip_hdr_ptr; - u8 protocol; + if (eth_hdr_ptr->h_proto == htons(ETH_P_IP)) { + const struct iphdr *ip_hdr_ptr = buffer + ETH_HLEN; - ip_hdr_ptr = &buffer[ETHERNET_HDR_LEN]; - protocol = ip_hdr_ptr[9]; - - if (protocol == 0x06) { - u8 *tcp_hdr_ptr; + if (ip_hdr_ptr->protocol == IPPROTO_TCP) { + const struct tcphdr *tcp_hdr_ptr; u32 IHL, total_length, data_offset; - tcp_hdr_ptr = &ip_hdr_ptr[IP_HDR_LEN]; - IHL = (ip_hdr_ptr[0] & 0xf) << 2; - total_length = ((u32)ip_hdr_ptr[2] << 8) + - (u32)ip_hdr_ptr[3]; - data_offset = ((u32)tcp_hdr_ptr[12] & 0xf0) >> 2; + IHL = ip_hdr_ptr->ihl << 2; + tcp_hdr_ptr = buffer + ETH_HLEN + IHL; + total_length = ntohs(ip_hdr_ptr->tot_len); + + data_offset = tcp_hdr_ptr->doff << 2; if (total_length == (IHL + data_offset)) { u32 seq_no, ack_no; - seq_no = ((u32)tcp_hdr_ptr[4] << 24) + - ((u32)tcp_hdr_ptr[5] << 16) + - ((u32)tcp_hdr_ptr[6] << 8) + - (u32)tcp_hdr_ptr[7]; - - ack_no = ((u32)tcp_hdr_ptr[8] << 24) + - ((u32)tcp_hdr_ptr[9] << 16) + - ((u32)tcp_hdr_ptr[10] << 8) + - (u32)tcp_hdr_ptr[11]; - + seq_no = ntohl(tcp_hdr_ptr->seq); + ack_no = ntohl(tcp_hdr_ptr->ack_seq); for (i = 0; i < tcp_session; i++) { u32 j = ack_session_info[i].seq_num; |