UDPã§ãƒžãƒ«ãƒã‚ャストを使ã†:Geekãªãºãƒ¼ã˜ãƒžãƒ«ãƒã‚ャストé€ä¿¡ã‚µãƒ³ãƒ—ル ã¾ãšã¯ã€ãƒžãƒ«ãƒã‚ャストをé€ä¿¡ã™ã‚‹ã‚µãƒ³ãƒ—ルを以下ã«ç¤ºã—ã¾ã™ã€‚ ã“ã®ã‚µãƒ³ãƒ—ルã§ã¯winsock2.hã ã‘ã§ãªãws2tcpip.hã¨ã„ã†ãƒ•ã‚¡ã‚¤ãƒ«ã‚’includeã—ã¦ã„ã‚‹ã®ã§æ³¨æ„ã—ã¦ãã ã•ã„。 ws2tcpip.hã§IP_MULTICAST_IFã‚„struct ip_mreqãªã©ãŒå®£è¨€ã•ã‚Œã¦ã„ã¾ã™ã€‚ #include <stdio.h> #include <winsock2.h> #include <ws2tcpip.h> int main() { WSAData wsaData; SOCKET sock; struct sockaddr_in addr; DWORD ipaddr; WSAStartup(MAKEWORD(2,0), &wsaData); sock = socket(AF_INET, SOCK_DGRAM, 0); addr.sin_family =
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