一开始想直接在上个程序改,自己构造IP包头,但后来发现不行,微软不让干了,所有后来选用libcap库来收发包
代码写的很乱..
1 #pragma pack(4)
2
3 #define ECHO_REQUEST 8
4 #define DATASIZE 65500
5 #define PACKETSIZE 65535
6 #define IPCOUNT 9
7 #define MACSIZE 6
8 #define OPTION_RR 7
9
10 struct ethhdr
11 {
12 char mac_dst[MACSIZE];
13 char mac_src[MACSIZE];
14
15 unsigned short eth_protocol;
16
17 char eth_data[DATASIZE];
18 };
19
20 struct iphdr
21 {
22 unsigned char ip_hdr_len : 4; //包头长度
23 unsigned char ip_version : 4; //版本
24 unsigned char ip_tos;
25
26 unsigned short ip_length; //总长度
27 unsigned short ip_identify;//标识
28 unsigned short ip_offset;//片偏移
29 unsigned char ip_ttl;
30 unsigned char ip_protocol;
31 unsigned short ip_cksum;
32
33 struct in_addr ip_src; //源地址
34 struct in_addr ip_dst; //目的地址
35
36 unsigned char ip_code;
37 unsigned char ip_len;
38 unsigned char ip_ptr;
39
40 struct in_addr ip_router[IPCOUNT];
41
42 char ip_data[DATASIZE];
43 };
44
45 struct icmphdr
46 {
47 unsigned char icmp_type; //8位类型
48 unsigned char icmp_code; //8位代码
49 unsigned short icmp_cksum; //16位的校验和
50
51 unsigned short icmp_identify;
52 unsigned short icmp_seq;
53
54 LONGLONG icmp_timestamp;
55 char icmp_data[DATASIZE];
56 };
57
58 bool ping_rr(char * target,int payload,int count)
59 {
60 WSADATA wsaData;
61 WSAStartup(MAKEWORD(2, 2), &wsaData);
62
63 if(payload > DATASIZE)
64 {
65 printf("发送的字节数有错误,有效范围从 0 到 %d",DATASIZE);
66 return false;
67 }
68
69 payload = payload - sizeof(LONGLONG);
70
71 struct hostent* phostent = gethostbyname(target);
72 if (!phostent)
73 {
74 printf("解析IP失败!\n");
75 return false;
76 }
77
78 struct in_addr addrSrv = {0};
79 addrSrv.S_un.S_addr = *(u_long *)phostent->h_addr_list[0];
80
81 printf("正在 Ping %s [%s] 具有 %d 字节的数据: \n",target,inet_ntoa(addrSrv),payload + sizeof(LONGLONG));
82
83 icmphdr ihdr = {0};
84 iphdr ip_hdr = {0};
85 ethhdr eth_hdr = {0};
86
87 char mac_src[] = "\x68\xf7\x28\x7f\xc2\x71"; //本机MAC地址
88 char mac_dst[] = "\x84\xd9\x31\xb9\x21\x98"; //目的MAC地址
89
90 memcpy((void *)eth_hdr.mac_src,(void *)mac_src,sizeof(mac_src) -1);
91 memcpy((void *)eth_hdr.mac_dst,(void *)mac_dst,sizeof(mac_dst) -1);
92
93 eth_hdr.eth_protocol = htons(2048); //0x0800 //链路层IP数据报
94
95 ip_hdr.ip_hdr_len = 0xf; //包头设置为最大长度
96 ip_hdr.ip_version = 4;
97 ip_hdr.ip_identify = (unsigned short)GetCurrentProcessId();
98 ip_hdr.ip_offset = 0;
99 ip_hdr.ip_ttl = 0x40;//默认设置为64
100 ip_hdr.ip_protocol = IPPROTO_ICMP;
101 ip_hdr.ip_src.s_addr = inet_addr("172.30.1.145"); //本机IP
102 ip_hdr.ip_dst.s_addr = *(u_long *)phostent->h_addr_list[0];
103 ip_hdr.ip_code = OPTION_RR; //RR选项为7
104 ip_hdr.ip_len = 0x27; //39字节 最多能存9个IP地址
105 ip_hdr.ip_ptr = 4;
106 ip_hdr.ip_cksum = 0;
107
108 memset((void *)ip_hdr.ip_router,0,sizeof(struct in_addr) * IPCOUNT);
109
110 memset((void *)ihdr.icmp_data,0,DATASIZE);
111 memset((void *)ip_hdr.ip_data,0,DATASIZE);
112
113 packet_pad(ihdr.icmp_data,payload); //填充数据
114
115 ihdr.icmp_type = ECHO_REQUEST;
116 ihdr.icmp_identify = (unsigned short)GetCurrentProcessId();
117
118 int hdr_len = payload + sizeof(icmphdr) - DATASIZE;
119 int datalen = hdr_len + (ip_hdr.ip_hdr_len << 2);
120 int sendlen = datalen + sizeof(ethhdr) - DATASIZE;
121 ip_hdr.ip_length = htons(datalen);
122
123 char recv[PACKETSIZE] = {0};
124
125 unsigned long interval = 0;
126 unsigned long avgdelay = 0;
127 unsigned long maxdelay = 0;
128 unsigned long mindelay = ~0;
129
130 unsigned int sendcnt = count;
131 unsigned int losscnt = 0;
132
133 char strErrorbuf[PCAP_ERRBUF_SIZE] = {0};
134
135 std::string strNickName = "\\Device\\NPF_{D8AECAAE-F28C-4161-BA6B-BCA1B807F2E5}"; //本机网卡
136
137 pcap_t* pcap_handle = NULL;
138 if ((pcap_handle = pcap_open_live(strNickName.c_str(),65536,1,1000,strErrorbuf))==NULL)
139 {
140 return false;
141 }
142
143 if( pcap_datalink(pcap_handle) != DLT_EN10MB )
144 {
145 return false;
146 }
147
148 unsigned int netip,netmask;
149 if (pcap_lookupnet(strNickName.c_str(),&netip,&netmask,strErrorbuf) < 0)
150 {
151 return false;
152 }
153
154 std::string strFilter = "icmp"; //协议过滤 只抓icmp的包
155 struct bpf_program nFcode;
156 if ( pcap_compile(pcap_handle, &nFcode,strFilter.c_str(), 1, netmask) < 0 )
157 {
158 return false;
159 }
160
161 if ( pcap_setfilter(pcap_handle, &nFcode) < 0 )
162 {
163 return false;
164 }
165
166 int next = 0;
167
168 struct pcap_pkthdr * header = NULL;
169 const unsigned char* pkt_data = NULL;
170
171 for(int seq = 0; seq < count; ++seq)
172 {
173 memset((void *)ip_hdr.ip_router,0,sizeof(struct in_addr) * IPCOUNT);
174
175 ihdr.icmp_seq = seq;
176 ihdr.icmp_cksum = 0;
177 ihdr.icmp_timestamp = GetSysTickCount64(); //发送时间
178 ihdr.icmp_cksum = checksum(hdr_len,(unsigned short *)&ihdr);
179
180 memcpy((void *)ip_hdr.ip_data,(void *)&ihdr,hdr_len);
181
182 ip_hdr.ip_cksum = 0;
183 ip_hdr.ip_ptr = 4;
184 ip_hdr.ip_cksum = checksum(datalen,(unsigned short *)&ip_hdr);
185
186 memcpy((void *)eth_hdr.eth_data,(void *)&ip_hdr,datalen);
187
188 if(pcap_sendpacket(pcap_handle,(unsigned char *)ð_hdr,sendlen) != 0) //发送数据包
189 {
190 --sendcnt;
191 continue;
192 }
193
194 while(next = pcap_next_ex(pcap_handle, &header, &pkt_data))
195 {
196 iphdr* piphdr = (iphdr *) (pkt_data + sizeof(ethhdr) - DATASIZE);
197
198 if(checksum(piphdr->ip_hdr_len << 2,(unsigned short *)piphdr) != 0)
199 {
200 printf("invalid ip packet!\n");
201 continue;
202 }
203
204 icmphdr* pichdr = (icmphdr *)(pkt_data + sendlen - hdr_len);
205 if(checksum(hdr_len,(unsigned short *)pichdr) != 0)
206 {
207 printf("invalid icmp packet!\n");
208 continue;
209 }
210
211 if(piphdr->ip_ptr == 4)
212 {
213 continue;
214 }
215
216 memcpy((void *)piphdr->ip_router,(void *)((char *)piphdr->ip_router -1),sizeof(struct in_addr) * IPCOUNT);//内存对齐问题
217
218 interval = GetSysTickCount64() - pichdr->icmp_timestamp;
219 avgdelay+= interval;
220
221 maxdelay = interval > maxdelay ? interval : maxdelay;
222 mindelay = interval > mindelay ? mindelay : interval;
223
224 int record = (piphdr->ip_ptr-4) >> 2;
225
226 printf("来自 %s 的回复: 字节=%d 时间=%dms TTL=%u\n",inet_ntoa(addrSrv),payload + sizeof(LONGLONG),interval,piphdr->ip_ttl);
227
228 printf(" 路由: %s -->\n",inet_ntoa(piphdr->ip_router[0]));
229 for(int i = 1; i < record;i++)
230 {
231 printf(" %s -->\n",inet_ntoa(piphdr->ip_router[i]));
232 }
233
234 break;
235 }
236
237 if(next == -2)
238 {
239 losscnt++;
240 }
241
242 }
243
244 printf("\n");
245 printf("%s 的 Ping 统计信息: \n",inet_ntoa(addrSrv));
246 printf(" 数据包: 已发送 = %d, 已接收 = %d, 丢失 = %d (%.2f%% 丢失),\n",sendcnt,sendcnt-losscnt,losscnt,(losscnt * 100) / (double)sendcnt);
247 printf("往返行程的估计时间(以毫秒为单位):\n");
248 printf(" 最短 = %dms, 最长 = %dms, 平均 = %dms\n",mindelay,maxdelay,avgdelay / sendcnt);
249 printf("\n");
250
251 return true;
252 }
时间： 2024-10-09 01:29:28