UDP(7) Linux UDP(7) NAME () udp - IPv4 UDP . SYNOPSIS () #include #include udp_socket = socket(PF_INET, SOCK_DGRAM, 0); DESCRIPTION() RFC768 . , . . UDP . UDP , . sendto(2) sendmsg(2) . connect(2) , , send(2) write(2) . sendto(2) sendmsg(2) . , bind(2) , , . . , , , MSG_TRUNC . IP ip(7) . sysctl , (, ). ip(7). MSG_DONTROUTE ,, . UDP MTU(Maximum Transmission Unit ), UDP . path MTU discovery(MTU), ip(7) IP_PMTU_DISCOVER . ADDRESS FORMAT () UDP IPv4 sockaddr_in , ip(7) . ERROR HANDLING () , . BSD , , , Linux RFC1122 . , SO_BSDCOMPAT SOL_SOCKET ( EPROTO EMSGSIZE) . , . . IP_RECVERR , , MSG_ERRQUEUE recvmsg(2) . ERRORS () socket(7) ip(7) UDP . ECONNREFUSED . . VERSIONS() IP_RECVERR Linux 2.2 . CREDITS() Andi Kleen. SEE ALSO() ip(7), socket(7), raw(7). RFC768: . RFC1122: RFC1191: path MTU discovery (MTU). [] riser [] 2001/07/19 linuxman: http://cmpp.linuxforum.net man man https://github.com/man-pages-zh/manpages- zh Linux 1998102 UDP(7)