//dos下的ping.c
//网络是pctcp,开发工具borlandc 3.1
//问题是：1,dos发icmp包时，SOKET用什么参数，否则recvfrom不能接受到回复包
//问题是：2,谁有更好的方法，请和我联系，
toter@163.com
//全部源码如下，请教高手。。。
/*所用的lib包
sconfig.lib
snetlib.lib
spc.lib
ssocket.lib
*/
#include <stdio.h>
#include <dos.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <netdb.h>
#include <process.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <netinet\in.h>
typedef int INT;
typedef unsigned int UINT;
typedef unsigned long DWORD;
typedef int BOOL;
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef float FLOAT;
typedef unsigned long ULONG;
typedef unsigned short USHORT;
typedef unsigned char UCHAR;
typedef char *PSZ;
#define PORT 1000 /* the port client will be connecting to */
#define ServerIP "192.168.1.43"
#define ICMP_ECHO 8
#define MAX_PACKET 1024 // Max ICMP packet size
typedef struct _iphdr
{
unsigned int h_len:4; // Length of the header
unsigned int version:4; // Version of IP
unsigned char tos; // Type of service
unsigned short total_len; // Total length of the packet
unsigned short ident; // Unique identifier
unsigned short frag_and_flags; // Flags
unsigned char ttl; // Time to live
unsigned char proto; // Protocol (TCP, UDP etc)
unsigned short checksum; // IP checksum
unsigned int sourceIP;
unsigned int destIP;
} IpHeader;
typedef struct _icmphdr
{
BYTE i_type;
BYTE i_code; // Type sub code
USHORT i_cksum;
USHORT i_id;
USHORT i_seq;
// This is not the standard header, but we reserve space for time
ULONG timestamp;
} IcmpHeader;
//
// IP option header - use with socket option IP_OPTIONS
//
typedef struct _ipoptionhdr
{
unsigned char code; // Option type
unsigned char len; // Length of option hdr
unsigned char ptr; // Offset into options
unsigned long addr; // List of IP addrs
} IpOptionHeader;
void FillICMPData(char *icmp_data, int datasize)
{
IcmpHeader *icmp_hdr = NULL;
char *datapart = NULL;
icmp_hdr = (IcmpHeader*)icmp_data;
icmp_hdr->i_type = ICMP_ECHO; // Request an ICMP echo
icmp_hdr->i_code = 0;
icmp_hdr->i_id = (USHORT)getpid();
icmp_hdr->i_cksum = 0;
icmp_hdr->i_seq = 0;
datapart = icmp_data + sizeof(IcmpHeader);
}
//puclic code
//网际校验和生产算法
//网际校验和是被校验数据16位值的反码和(ones-complement sum)
unsigned short in_cksum(unsigned short* addr, int len)
{
int nleft = len;
int sum = 0;
unsigned short* w = addr;
unsigned short answer = 0;
while(nleft > 1)
{
sum += *w++;
nleft -= 2;
}
if(nleft == 1)
{
*(unsigned char*)(&answer) = *(unsigned char*)w;
sum += answer;
}
sum = (sum >> 16) + (sum & 0xffff);
sum += (sum >> 16);
answer = ~sum;
return (answer);
}
main()
{
int sockfd;
int iSendSize;
struct sockaddr_in dest,from;
char icmp_data;
int datasize,ret,tmp;
USHORT seq_no ;
int fromlen;
int iRecvSize;
IpOptionHeader m_ipopt;
char recv_buffer;
long last_time, now, timeout = 15L;
if((sockfd=socket(AF_INET, SOCK_RAW, IPPROTO_ICMP))<0)//这里不知道用在dos下用什么参数
//if((sockfd=socket(AF_INET,SOCK_DGRAM,0))<0)//dos下的upd通讯连接方式
{
printf("socket() failed\n");
exit(1);
}
dest.sin_family =AF_INET;
//server.sin_port =htons( PORT );
dest.sin_addr.s_addr = inet_addr(ServerIP);
// Create the ICMP packet
datasize += sizeof(IcmpHeader);
memset(icmp_data,0,MAX_PACKET);
FillICMPData(icmp_data,datasize);
((IcmpHeader*)icmp_data)->i_cksum = 0;
((IcmpHeader*)icmp_data)->timestamp = (unsigned long)time(NULL);
((IcmpHeader*)icmp_data)->i_seq = seq_no++;
((IcmpHeader*)icmp_data)->i_cksum = in_cksum((unsigned short*)icmp_data, sizeof(IcmpHeader) + datasize);
iSendSize= sendto(sockfd, icmp_data,1024,0, (struct sockaddr*)&dest, sizeof(dest)) ;
if (iSendSize< 0 )
{
printf("icmp sendto 192.168.1.43 failed\n");
close(sockfd);
exit(2);
}
printf("发送的数据 %d \n",iSendSize);
fprintf(stdout, "Reply...\r\n");
memset(&from, 0, sizeof from);
memset(recv_buffer, 0, 1024);
fromlen = sizeof(from);
iRecvSize = recvfrom(sockfd, recv_buffer, 1024, 0, (struct sockaddr*)&from, &fromlen);
if (iRecvSize > 0){
printf("recvfrom 192.168.1.43 success\n");
}else
{
printf("recvfrom 192.168.1.43 failed\n");
}
close(sockfd);
return 1;
}
