1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Ramon Fried <rfried.dev@gmail.com>
*/
#include <common.h>
#include <net.h>
#include <net/pcap.h>
#include <time.h>
#include <asm/io.h>
#define LINKTYPE_ETHERNET 1
static bool initialized;
static bool running;
static bool buffer_full;
static void *buf;
static unsigned int max_size;
static unsigned int pos;
static unsigned long incoming_count;
static unsigned long outgoing_count;
struct pcap_header {
u32 magic;
u16 version_major;
u16 version_minor;
s32 thiszone;
u32 sigfigs;
u32 snaplen;
u32 network;
};
struct pcap_packet_header {
u32 ts_sec;
u32 ts_usec;
u32 incl_len;
u32 orig_len;
};
static struct pcap_header file_header = {
.magic = 0xa1b2c3d4,
.version_major = 2,
.version_minor = 4,
.snaplen = 65535,
.network = LINKTYPE_ETHERNET,
};
int pcap_init(phys_addr_t paddr, unsigned long size)
{
buf = map_physmem(paddr, size, 0);
if (!buf) {
printf("Failed mapping PCAP memory\n");
return -ENOMEM;
}
printf("PCAP capture initialized: addr: 0x%lx max length: %lu\n",
(unsigned long)buf, size);
memcpy(buf, &file_header, sizeof(file_header));
pos = sizeof(file_header);
max_size = size;
initialized = true;
running = false;
buffer_full = false;
incoming_count = 0;
outgoing_count = 0;
return 0;
}
int pcap_start_stop(bool start)
{
if (!initialized) {
printf("error: pcap was not initialized\n");
return -ENODEV;
}
running = start;
return 0;
}
int pcap_clear(void)
{
if (!initialized) {
printf("error: pcap was not initialized\n");
return -ENODEV;
}
pos = sizeof(file_header);
incoming_count = 0;
outgoing_count = 0;
buffer_full = false;
printf("pcap capture cleared\n");
return 0;
}
int pcap_post(const void *packet, size_t len, bool outgoing)
{
struct pcap_packet_header header;
u64 cur_time = timer_get_us();
if (!initialized || !running || !buf)
return -ENODEV;
if (buffer_full)
return -ENOMEM;
if ((pos + len + sizeof(header)) >= max_size) {
buffer_full = true;
printf("\n!!! Buffer is full, consider increasing buffer size !!!\n");
return -ENOMEM;
}
header.ts_sec = cur_time / 1000000;
header.ts_usec = cur_time % 1000000;
header.incl_len = len;
header.orig_len = len;
memcpy(buf + pos, &header, sizeof(header));
pos += sizeof(header);
memcpy(buf + pos, packet, len);
pos += len;
if (outgoing)
outgoing_count++;
else
incoming_count++;
env_set_hex("pcapsize", pos);
return 0;
}
int pcap_print_status(void)
{
if (!initialized) {
printf("pcap was not initialized\n");
return -ENODEV;
}
printf("PCAP status:\n");
printf("\tInitialized addr: 0x%lx\tmax length: %u\n",
(unsigned long)buf, max_size);
printf("\tStatus: %s.\t file size: %u\n", running ? "Active" : "Idle",
pos);
printf("\tIncoming packets: %lu Outgoing packets: %lu\n",
incoming_count, outgoing_count);
return 0;
}
bool pcap_active(void)
{
return running;
}
|