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 [读书笔记]获取IP地址
读书笔记
oceanblue 发表于 2006/11/21 16:07:13 |
| ////////////////////////////////////////////////////////////////// VCKBASE Online Journal//// getip1.cpp//// This program reports the IP address for each adapter in your machine.// To compile from command-line type://// cl getip1.cpp wsock32.lib//// Make sure your INCLUDE and LIB environment variables are set up properly;// you can run vcvars32.bat//#include <winsock.h>#include <wsipx.h>#include <wsnwlink.h>#include <stdio.h>
int main(){ //////////////// // Initialize windows sockets API. Ask for version 1.1 // WORD wVersionRequested = MAKEWORD(1, 1); WSADATA wsaData; if (WSAStartup(wVersionRequested, &wsaData)) { printf("WSAStartup failed %s\n", WSAGetLastError()); return -1; }
////////////////// // Get host name. // char hostname[256]; int res = gethostname(hostname, sizeof(hostname)); if (res != 0) { printf("Error: %u\n", WSAGetLastError()); return -1; } printf("hostname=%s\n", hostname);
//////////////// // Get host info for hostname. // hostent* pHostent = gethostbyname(hostname); if (pHostent==NULL) { printf("Error: %u\n", WSAGetLastError()); return -1; }
////////////////// // Parse the hostent information returned // hostent& he = *pHostent; printf("name=%s\naliases=%s\naddrtype=%d\nlength=%d\n", he.h_name, he.h_aliases, he.h_addrtype, he.h_length); sockaddr_in sa; for (int nAdapter=0; he.h_addr_list[nAdapter]; nAdapter++) { memcpy ( &sa.sin_addr.s_addr, he.h_addr_list[nAdapter],he.h_length); // Output the machines IP Address. printf("Address: %s\n", inet_ntoa(sa.sin_addr)); // display as string }
////////////////// // Terminate windows sockets API // WSACleanup();
return 0;} |
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