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/*
* Copyright (C) 2011 Samsung Electronics.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/netdevice.h>
#include <linux/platform_data/modem_na.h>
#include <linux/platform_device.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <net/ip.h>
#include "modem_prj.h"
#include "modem_utils.h"
#define CMD_SUSPEND ((unsigned short)(0x00CA))
#define CMD_RESUME ((unsigned short)(0x00CB))
static char ip_flags[16];
static char tcp_flags[32];
/* dump2hex
* dump data to hex as fast as possible.
* the length of @buf must be greater than "@len * 3"
* it need 3 bytes per one data byte to print.
*/
static inline int dump2hex(char *buf, const char *data, size_t len)
{
static const char *hex = "0123456789abcdef";
char *dest = buf;
int i;
for (i = 0; i < len; i++) {
*dest++ = hex[(data[i] >> 4) & 0xf];
*dest++ = hex[data[i] & 0xf];
*dest++ = ' ';
}
if (likely(len > 0))
dest--; /* last space will be overwrited with null */
*dest = '\0';
return dest - buf;
}
/* print buffer as hex string */
int pr_buffer(const char *tag, const char *data, size_t data_len,
size_t max_len)
{
size_t len = min(data_len, max_len);
unsigned char hexstr[len ? len * 3 : 1]; /* 1 <= sizeof <= max_len*3 */
dump2hex(hexstr, data, len);
return printk(KERN_DEBUG "[MIF] %s(%u): %s%s\n", tag, data_len, hexstr,
len == data_len ? "" : " ...");
}
/* flow control CMD from CP, it use in serial devices */
int link_rx_flowctl_cmd(struct link_device *ld, const char *data, size_t len)
{
unsigned short *cmd, *end = (unsigned short *)(data + len);
struct io_device *iod = NULL, *multi_raw_iod;
int i;
pr_debug("[MODEM_IF] flow control cmd: size=%d\n", len);
multi_raw_iod = find_iodev(ld, IPC_MULTI_RAW);
if (!multi_raw_iod || !multi_raw_iod->private_data) {
pr_err("[MODEM_IF] %s: no multi raw device\n", __func__);
return -ENODEV;
}
for (cmd = (unsigned short *)data; cmd < end; cmd++) {
switch (*cmd) {
case CMD_SUSPEND:
raw_devs_for_each(multi_raw_iod, i, iod) {
if (iod->io_typ == IODEV_NET && iod->ndev)
netif_stop_queue(iod->ndev);
}
ld->raw_tx_suspended = true;
pr_info("[MODEM_IF] flowctl CMD_SUSPEND(%04X)\n", *cmd);
break;
case CMD_RESUME:
raw_devs_for_each(multi_raw_iod, i, iod) {
if (iod->io_typ == IODEV_NET && iod->ndev)
netif_wake_queue(iod->ndev);
}
ld->raw_tx_suspended = false;
complete_all(&ld->raw_tx_resumed_by_cp);
pr_info("[MODEM_IF] flowctl CMD_RESUME(%04X)\n", *cmd);
break;
default:
pr_err("[MODEM_IF] flowctl BAD CMD: %04X\n", *cmd);
break;
}
}
return 0;
}
void mif_print_data(char *buf, int len)
{
int words = len >> 4;
int residue = len - (words << 4);
int i;
char *b;
char last[80];
char tb[8];
/* Make the last line, if ((len % 16) > 0) */
if (residue > 0) {
memset(last, 0, sizeof(last));
memset(tb, 0, sizeof(tb));
b = buf + (words << 4);
sprintf(last, "%04X: ", (words << 4));
for (i = 0; i < residue; i++) {
sprintf(tb, "%02x ", b[i]);
strcat(last, tb);
if ((i & 0x3) == 0x3) {
sprintf(tb, " ");
strcat(last, tb);
}
}
}
for (i = 0; i < words; i++) {
b = buf + (i << 4);
printk(KERN_ERR "%04X: "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x\n",
(i << 4),
b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
b[8], b[9], b[10], b[11], b[12], b[13], b[14], b[15]);
}
/* Print the last line */
if (residue > 0)
printk(KERN_ERR "%s\n", last);
}
void print_sipc4_hdlc_fmt_frame(const u8 *psrc)
{
u8 *frm; /* HDLC Frame */
struct fmt_hdr *hh; /* HDLC Header */
struct sipc_fmt_hdr *fh; /* IPC Header */
u16 hh_len = sizeof(struct fmt_hdr);
u16 fh_len = sizeof(struct sipc_fmt_hdr);
u8 *data;
int dlen;
/* Actual HDLC header starts from after START flag (0x7F) */
frm = (u8 *)(psrc + 1);
/* Point HDLC header and IPC header */
hh = (struct fmt_hdr *)(frm);
fh = (struct sipc_fmt_hdr *)(frm + hh_len);
/* Point IPC data */
data = frm + (hh_len + fh_len);
dlen = hh->len - (hh_len + fh_len);
pr_err("--------------------HDLC & FMT HEADER----------------------\n");
pr_err("HDLC len = %d, HDLC control = 0x%02x\n", hh->len, hh->control);
pr_err("(M)0x%02X, (S)0x%02X, (T)0x%02X, mseq:%d, aseq:%d, len:%d\n",
fh->main_cmd, fh->sub_cmd, fh->cmd_type,
fh->msg_seq, fh->ack_seq, fh->len);
pr_err("-----------------------IPC FMT DATA------------------------\n");
if (dlen > 0) {
if (dlen > 64)
dlen = 64;
mif_print_data(data, dlen);
}
pr_err("-----------------------------------------------------------\n");
}
void print_sipc4_fmt_frame(const u8 *psrc)
{
struct sipc_fmt_hdr *fh = (struct sipc_fmt_hdr *)psrc;
u16 fh_len = sizeof(struct sipc_fmt_hdr);
u8 *data;
int dlen;
/* Point IPC data */
data = (u8 *)(psrc + fh_len);
dlen = fh->len - fh_len;
pr_err("----------------------IPC FMT HEADER-----------------------\n");
pr_err("(M)0x%02X, (S)0x%02X, (T)0x%02X, mseq:%d, aseq:%d, len:%d\n",
fh->main_cmd, fh->sub_cmd, fh->cmd_type,
fh->msg_seq, fh->ack_seq, fh->len);
pr_err("-----------------------IPC FMT DATA------------------------\n");
if (dlen > 0)
mif_print_data(data, dlen);
pr_err("-----------------------------------------------------------\n");
}
static void print_tcp_header(u8 *pkt)
{
int i;
struct tcphdr *tcph = (struct tcphdr *)pkt;
u8 *opt = pkt + TCP_HDR_SIZE;
unsigned opt_len = (tcph->doff << 2) - TCP_HDR_SIZE;
/*-------------------------------------------------------------------------
TCP Header Format
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Port | Destination Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Acknowledgment Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Data | |C|E|U|A|P|R|S|F| |
| Offset| Rsvd |W|C|R|C|S|S|Y|I| Window |
| | |R|E|G|K|H|T|N|N| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Checksum | Urgent Pointer |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Options | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| data |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-------------------------------------------------------------------------*/
memset(tcp_flags, 0, sizeof(tcp_flags));
if (tcph->cwr)
strcat(tcp_flags, "CWR ");
if (tcph->ece)
strcat(tcp_flags, "ECE ");
if (tcph->urg)
strcat(tcp_flags, "URG ");
if (tcph->ack)
strcat(tcp_flags, "ACK ");
if (tcph->psh)
strcat(tcp_flags, "PSH ");
if (tcph->rst)
strcat(tcp_flags, "RST ");
if (tcph->syn)
strcat(tcp_flags, "SYN ");
if (tcph->fin)
strcat(tcp_flags, "FIN ");
pr_err("TCP:: Src Port = %u, Dst Port = %u\n",
ntohs(tcph->source), ntohs(tcph->dest));
pr_err("TCP:: SEQ = 0x%08X(%u), ACK = 0x%08X(%u)\n",
ntohs(tcph->seq), ntohs(tcph->seq),
ntohs(tcph->ack_seq), ntohs(tcph->ack_seq));
pr_err("TCP:: Flags = %s\n", tcp_flags);
pr_err("TCP:: Window = %u, Checksum = 0x%04X, Urg Pointer = %u\n",
ntohs(tcph->window), ntohs(tcph->check), ntohs(tcph->urg_ptr));
if (opt_len > 0) {
printk(KERN_ERR "TCP:: Options = ");
for (i = 0; i < opt_len; i++)
printk("%02X ", opt[i]);
printk("\n");
}
}
static void print_udp_header(u8 *pkt)
{
struct udphdr *udph = (struct udphdr *)pkt;
/*-------------------------------------------------------------------------
UDP Header Format
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Port | Destination Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| data |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-------------------------------------------------------------------------*/
pr_err("UDP:: Src Port = %u, Dst Prt = %u\n",
ntohs(udph->source), ntohs(udph->dest));
pr_err("UDP:: Length = %u, Checksum = 0x%04X\n",
ntohs(udph->len), ntohs(udph->check));
if (ntohs(udph->dest) == 53)
pr_err("UDP:: DNS query!!!\n");
if (ntohs(udph->source) == 53)
pr_err("UDP:: DNS response!!!\n");
}
void print_ip4_packet(u8 *ip_pkt)
{
struct iphdr *iph = (struct iphdr *)ip_pkt;
u8 *pkt = ip_pkt + (iph->ihl << 2);
u16 flags = (ntohs(iph->frag_off) & 0xE000);
u16 frag_off = (ntohs(iph->frag_off) & 0x1FFF);
pr_err("-----------------------------------------------------------\n");
/*---------------------------------------------------------------------------
IPv4 Header Format
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version| IHL |Type of Service| Total Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification |C|D|M| Fragment Offset |
| |E|F|F| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Time to Live | Protocol | Header Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Destination Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Options | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
IHL - Header Length
Flags - Consist of 3 bits
The 1st bit is "Congestion" bit.
The 2nd bit is "Dont Fragment" bit.
The 3rd bit is "More Fragments" bit.
---------------------------------------------------------------------------*/
memset(ip_flags, 0, sizeof(ip_flags));
if (flags & IP_CE)
strcat(ip_flags, "CE ");
if (flags & IP_DF)
strcat(ip_flags, "DF ");
if (flags & IP_MF)
strcat(ip_flags, "MF ");
pr_err("IP4:: Version = %u, Header Length = %u, TOS = %u, Length = %u\n",
iph->version, (iph->ihl << 2), iph->tos, ntohs(iph->tot_len));
pr_err("IP4:: ID = %u, Fragment Offset = %u\n",
ntohs(iph->id), frag_off);
pr_err("IP4:: Flags = %s\n", ip_flags);
pr_err("IP4:: TTL = %u, Protocol = %u, Header Checksum = 0x%04X\n",
iph->ttl, iph->protocol, ntohs(iph->check));
pr_err("IP4:: Src IP Addr = %u.%u.%u.%u, Dst IP Addr = %u.%u.%u.%u\n",
ip_pkt[12], ip_pkt[13], ip_pkt[14], ip_pkt[15],
ip_pkt[16], ip_pkt[17], ip_pkt[18], ip_pkt[19]);
switch (iph->protocol) {
case 6:
/* TCP */
print_tcp_header(pkt);
break;
case 17:
/* UDP */
print_udp_header(pkt);
break;
default:
break;
}
pr_err("-----------------------------------------------------------\n");
}
|
