3.1.2數(shù)據(jù)報(bào)套接字與流式套機(jī)字的對(duì)比網(wǎng)絡(luò)編程技術(shù)本講要點(diǎn)：1.數(shù)據(jù)報(bào)套接字的端口創(chuàng)建2.數(shù)據(jù)報(bào)套接字的數(shù)據(jù)發(fā)送3.數(shù)據(jù)報(bào)套接字的數(shù)據(jù)接收數(shù)據(jù)報(bào)套接字編程基本流程socket：創(chuàng)建數(shù)據(jù)報(bào)套接字sbind：套接字s與本地地址綁定等待客戶(hù)端請(qǐng)求到達(dá)……sendto/recvfrom：數(shù)據(jù)收發(fā)closesocket：關(guān)閉數(shù)據(jù)報(bào)套接字ssocket：創(chuàng)建數(shù)據(jù)報(bào)套接字ssendto/recvfrom：數(shù)據(jù)收發(fā)closesocket：關(guān)閉數(shù)據(jù)報(bào)套接字s服務(wù)器客戶(hù)端問(wèn)題：與流式套接字相比，數(shù)據(jù)報(bào)套接字的操作有何區(qū)別？數(shù)據(jù)報(bào)套接字與流式套接字對(duì)比數(shù)據(jù)報(bào)套接字流式套接字連接管理有無(wú)套接字創(chuàng)建SOCK_STREAMSOCK_DGRAMSOCKETsocket(intaf,inttype,intprotocol)SOCK_DGRAM數(shù)據(jù)報(bào)套接字與流式套接字對(duì)比數(shù)據(jù)報(bào)套接字流式套接字連接管理有無(wú)套接字創(chuàng)建SOCK_STREAMSOCK_DGRAM發(fā)送數(shù)據(jù)intsendto(SOCKETs,constcharFAR*buf,intlen,intflags,conststructsockaddrFAR*to,inttolen)目的IP＋目的端口號(hào)INADDR_BROADCASTintsend(SOCKETs,constcharFAR*buf,intlen,intflags)不需指明目標(biāo)地址僅1對(duì)1發(fā)送指明目標(biāo)地址支持1對(duì)多發(fā)送數(shù)據(jù)報(bào)套接字與流式套接字對(duì)比數(shù)據(jù)報(bào)套接字流式套接字連接管理有無(wú)套接字創(chuàng)建SOCK_STREAMSOCK_DGRAM發(fā)送數(shù)據(jù)intrecvfrom(SOCKETs,charFAR*buf,intlen,intflags,structsockaddrFAR*from,intFAR*fromlen)來(lái)源IP＋來(lái)源端口號(hào)intrecv(SOCKETs,charFAR*buf,intlen,intflags)不需指明目標(biāo)地址僅1對(duì)1發(fā)送指明目標(biāo)地址支持1對(duì)多發(fā)送接收數(shù)據(jù)不關(guān)心目標(biāo)地址