1 /* 2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver 3 * Copyright (c) 1991-1999 University of Maryland at College Park 4 * Copyright (c) 2007-2013 Zmanda, Inc. All Rights Reserved. 5 * All Rights Reserved. 6 * 7 * Permission to use, copy, modify, distribute, and sell this software and its 8 * documentation for any purpose is hereby granted without fee, provided that 9 * the above copyright notice appear in all copies and that both that 10 * copyright notice and this permission notice appear in supporting 11 * documentation, and that the name of U.M. not be used in advertising or 12 * publicity pertaining to distribution of the software without specific, 13 * written prior permission. U.M. makes no representations about the 14 * suitability of this software for any purpose. It is provided "as is" 15 * without express or implied warranty. 16 * 17 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. 19 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 20 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 21 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 22 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 23 * 24 * Author: James da Silva, Systems Design and Analysis Group 25 * Computer Science Department 26 * University of Maryland at College Park 27 */ 28 /* 29 * $Id: dgram.h,v 1.15 2006/05/25 01:47:11 johnfranks Exp $ 30 * 31 * interface for datagram module 32 */ 33 #ifndef DGRAM_H 34 #define DGRAM_H 35 36 #include "amanda.h" 37 38 /* 39 * Maximum datagram (UDP packet) we can generate. Size is limited by 40 * a 16 bit length field in an IPv4 header (65535), which must include 41 * the 24 byte IP header and the 8 byte UDP header. 42 */ 43 #define MAX_DGRAM (((1<<16)-1)-24-8) 44 45 typedef struct dgram_s { 46 char *cur; 47 int socket; 48 size_t len; 49 char data[MAX_DGRAM+1]; 50 } dgram_t; 51 52 int dgram_bind(dgram_t *dgram, sa_family_t family, in_port_t *portp); 53 void dgram_socket(dgram_t *dgram, int sock); 54 int dgram_send_addr(sockaddr_union *addr, dgram_t *dgram); 55 ssize_t dgram_recv(dgram_t *dgram, int timeout, 56 sockaddr_union *fromaddr); 57 void dgram_zero(dgram_t *dgram); 58 int dgram_cat(dgram_t *dgram, const char *fmt, ...) 59 G_GNUC_PRINTF(2,3); 60 void dgram_eatline(dgram_t *dgram); 61 62 #endif /* ! DGRAM_H */ 63