yMSUcKN3

1#include <iostream>
2#include <inttypes.h>
3#include <cstring>
4#include <stdlib.h>
5#include <winsock2.h>
6using namespace std;
7
8struct msgStruct {
9    uint32_t secretKey;
10    uint16_t requestType;
11    uint16_t padding;
12    char * varName;
13    uint16_t varLen;
14    char * varVal;
15};
16
17struct intStr {
18    uint32_t secretKey;
19    uint16_t requestType;
20    uint16_t padding;
21};
22
23struct lenStr {
24    uint16_t varLen;
25    char * varVal;
26};
27
28
29int main()
30{
31    msgStruct myMsg;
32    myMsg.secretKey = 1070;
33    myMsg.requestType = 1;
34    myMsg.padding = 0;
35    myMsg.varName = "PATH";
36    myMsg.varVal = "/tmp/usr";
37    myMsg.varLen = strlen(myMsg.varVal);
38    cout << myMsg.varLen << endl;
39
40    char * target = new char [sizeof(uint32_t) + 2*sizeof(uint16_t) + strlen(myMsg.varName) + strlen(myMsg.varVal) + sizeof(myMsg.varLen) + 2];
41
42    //char *target = new char[size];
43    int net_secretKey = myMsg.secretKey;
44    int net_requestType = myMsg.requestType;
45    int net_padding = myMsg.padding;
46    memcpy(target, &net_secretKey, sizeof(net_secretKey));
47    memcpy(target+sizeof(net_secretKey), &net_requestType, sizeof(net_requestType));
48    memcpy(target+sizeof(net_secretKey) + sizeof(net_requestType), &net_padding, sizeof(net_padding));
49    memcpy(target+sizeof(net_secretKey) + sizeof(net_requestType) + sizeof(net_padding), myMsg.varName, strlen(myMsg.varName));
50    target[sizeof(net_secretKey) + sizeof(net_requestType) + sizeof(net_padding) + strlen(myMsg.varName)] = '\0';
51    memcpy(target+sizeof(net_secretKey) + sizeof(net_requestType) + sizeof(net_padding) + strlen(myMsg.varName) + 1, &myMsg.varLen, sizeof(myMsg.varLen));
52    memcpy(target+sizeof(net_secretKey) + sizeof(net_requestType) + sizeof(net_padding) + strlen(myMsg.varName) + sizeof(myMsg.varLen) + 1, myMsg.varVal, strlen(myMsg.varVal));
53    target[sizeof(net_secretKey) + sizeof(net_requestType) + sizeof(net_padding) + strlen(myMsg.varName) + strlen(myMsg.varVal) + sizeof(myMsg.varLen) + 1] = '\0';
54
55    intStr is;
56    memcpy(&is, target, sizeof(intStr));
57    //cout << is.secretKey << endl;
58    //cout << is.requestType << endl;
59    //cout << is.padding << endl;
60    int x;
61    char str1[5];
62    char str2[5];
63    int y = sizeof(net_secretKey) + sizeof(net_requestType) + sizeof(net_padding);
64
65    memcpy(&str1, target+12, 5);
66    //memcpy(&str2, target+19, 7);
67    cout << str1 << endl;
68    memcpy(&str2, target+19, myMsg.varLen + 1);
69    cout << str2 << endl;
70    cout << str1 << endl;
71    /*for (unsigned int i = y; i < sizeof(uint32_t) + 2*sizeof(uint16_t) + strlen(myMsg.varName) + strlen(myMsg.varVal) + sizeof(myMsg.varLen) + 10; i++) {
72
73        if (target[i] == '\0') {
74            cout << y << endl;
75            cout << i << endl;
76            y = i;
77        }
78    }*/
79    lenStr ls;
80    memcpy(&ls, target+17, sizeof(uint16_t));
81    //cout << "varlen is " << ls.varLen << endl;
82    msgStruct recMsg;
83    recMsg.secretKey = is.secretKey;
84    recMsg.requestType = is.requestType;
85    recMsg.padding = is.padding;
86    recMsg.varLen = ls.varLen;
87    recMsg.varName = str1;
88    recMsg.varVal = str2;
89
90    cout << recMsg.secretKey << endl;
91    cout << recMsg.requestType << endl;
92    cout << recMsg.padding << endl;
93    cout << recMsg.varName << endl;
94    cout << recMsg.varLen << endl;
95    cout << recMsg.varVal << endl;
96    return 0;
97}