通過裁剪ping命令的原始碼，實現獲取網路狀態；ping通，則表示網路狀態ok，ping不通，則表示網路狀態error：
/*
使用ping 命令原始碼判斷網路狀態是否ok
*/#include #include #include #include #include #include #include #include typedef struct pingm_pakcetpingm_pakcet;
static pingm_pakcet pingpacket[128];
static struct sockaddr_in dest;
static int32_t rawsock = 0;
#define huip_address "192.168.2.99"
static unsigned short network_icmp_cksum(unsigned char *data, int32_t len)
if(odd)
sum = (sum >> 16) + (sum & 0xffff);
sum += (sum >> 16);
return ~sum;
}static void network_icmp_pack(struct icmp *icmph, int32_t seq, struct timeval *tv, int32_t length)
static int32_t network_icmp_send()
} if(packet)
network_icmp_pack((struct icmp *)send_buff,packet_send,&tv, 64);
size = sendto(rawsock, send_buff,64,0,(struct sockaddr *)&dest, sizeof(dest));
if(0 <=size)
else
usleep(1000 * 200);
return packet_send;
}static int32_t network_icmp_recv()
logdbg("call recv()failed\n");}}
break;
} return status;
}
int main()
memset(dest_str, 0x0, sizeof(dest_str));
memcpy(dest_str, huip_address,strlen(huip_address)+1);
memset(pingpacket, 0, sizeof(pingm_pakcet) * 128);
rawsock = socket(af_inet, sock_raw, protocol->p_proto);
if(rawsock < 0)
setsockopt(rawsock, sol_socket, so_rcvbuf, &size, sizeof(size));
bzero(&dest, sizeof(dest));
dest.sin_family = af_inet;
inaddr = inet_addr(huip_address);
memcpy((char *)&dest.sin_addr, &inaddr,sizeof(inaddr));
inaddr = dest.sin_addr.s_addr;
logdbg("ping %s (%ld.%ld.%ld.%ld) 56(84) bytes of data\n",
dest_str,(inaddr&0x000000ff)>>0,(inaddr&0x0000ff00)>>8,(inaddr&0x00ff0000)>>16,(inaddr&0xff000000)>>24);
network_icmp_send();
retnetworkstatus = network_icmp_recv();
//retnetworkstatus 為網路狀態情況
return 0;
}
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