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
|
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/ptrace.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <unistd.h>
void dump_memory_region(FILE* pMemFile, unsigned long start_address, long length, int serverSocket) {
unsigned long address;
int pageLength = 4096;
unsigned char page[pageLength];
fseeko(pMemFile, start_address, SEEK_SET);
for (address=start_address; address < start_address + length; address += pageLength) {
fread(&page, 1, pageLength, pMemFile);
if (serverSocket == -1) {
fwrite(&page, 1, pageLength, stdout);
} else {
send(serverSocket, &page, pageLength, 0);
}
}
}
int main(int argc, char **argv) {
if (argc == 2 || argc == 4) {
int pid = atoi(argv[1]);
long ptraceResult = ptrace(PTRACE_ATTACH, pid, NULL, NULL);
if (ptraceResult < 0) {
printf("Unable to attach to the pid specified\n");
return 1;
}
wait(NULL);
char mapsFilename[1024];
sprintf(mapsFilename, "/proc/%s/maps", argv[1]);
FILE* pMapsFile = fopen(mapsFilename, "r");
char memFilename[1024];
sprintf(memFilename, "/proc/%s/mem", argv[1]);
FILE* pMemFile = fopen(memFilename, "r");
int serverSocket = -1;
if (argc == 4) {
unsigned int port;
int count = sscanf(argv[3], "%d", &port);
if (count == 0) {
printf("Invalid port specified\n");
return 2;
}
serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket == -1) {
printf("Could not create socket\n");
return 3;
}
struct sockaddr_in serverSocketAddress;
serverSocketAddress.sin_addr.s_addr = inet_addr(argv[2]);
serverSocketAddress.sin_family = AF_INET;
serverSocketAddress.sin_port = htons(port);
if (connect(serverSocket, (struct sockaddr *) &serverSocketAddress, sizeof(serverSocketAddress)) < 0) {
printf("Could not connect to server\n");
return 4;
}
}
char line[256];
while (fgets(line, 256, pMapsFile) != NULL) {
unsigned long start_address;
unsigned long end_address;
sscanf(line, "%08lx-%08lx\n", &start_address, &end_address);
dump_memory_region(pMemFile, start_address, end_address - start_address, serverSocket);
}
fclose(pMapsFile);
fclose(pMemFile);
if (serverSocket != -1) {
close(serverSocket);
}
ptrace(PTRACE_CONT, pid, NULL, NULL);
ptrace(PTRACE_DETACH, pid, NULL, NULL);
} else {
printf("%s <pid>\n", argv[0]);
printf("%s <pid> <ip-address> <port>\n", argv[0]);
exit(0);
}
}
|
