2 * $Id: atp_packet.c,v 1.5 2002-01-17 06:08:55 srittau Exp $
4 * Copyright (c) 1990,1991 Regents of The University of Michigan.
7 * Permission to use, copy, modify, and distribute this software and
8 * its documentation for any purpose and without fee is hereby granted,
9 * provided that the above copyright notice appears in all copies and
10 * that both that copyright notice and this permission notice appear
11 * in supporting documentation, and that the name of The University
12 * of Michigan not be used in advertising or publicity pertaining to
13 * distribution of the software without specific, written prior
14 * permission. This software is supplied as is without expressed or
15 * implied warranties of any kind.
17 * Research Systems Unix Group
18 * The University of Michigan
20 * 535 W. William Street
23 * netatalk@itd.umich.edu
28 #endif /* HAVE_CONFIG_H */
31 #include <sys/types.h>
34 #include <sys/param.h>
35 #include <netinet/in.h>
37 #include <netatalk/at.h>
38 #include <netatalk/endian.h>
40 #include <atalk/netddp.h>
41 #include <atalk/ddp.h>
42 #include <atalk/atp.h>
43 #include <atalk/util.h>
45 #include "atp_internals.h"
47 /* FIXME/SOCKLEN_T: socklen_t is a unix98 feature. */
49 #define SOCKLEN_T unsigned int
50 #endif /* ! SOCKLEN_T */
55 static void print_func( ctrlinfo )
58 switch ( ctrlinfo & ATP_FUNCMASK ) {
72 printf( "%x", ctrlinfo & ATP_FUNCMASK );
76 static void dump_packet( buf, len )
82 for ( i = 0; i < len; ++i ) {
83 printf( "%x-%c ", buf[i], buf[i] );
88 void atp_print_addr( s, saddr )
90 struct sockaddr_at *saddr;
93 saddr->sat_family == AF_APPLETALK ? printf( "at." ) :
94 printf( "%d.", saddr->sat_family );
95 saddr->sat_addr.s_net == ATADDR_ANYNET ? printf( "*." ) :
96 printf( "%d.", ntohs( saddr->sat_addr.s_net ));
97 saddr->sat_addr.s_node == ATADDR_ANYNODE ? printf( "*." ) :
98 printf( "%d.", saddr->sat_addr.s_node );
99 saddr->sat_port == ATADDR_ANYPORT ? printf( "*" ) :
100 printf( "%d", saddr->sat_port );
105 void atp_build_req_packet( struct atpbuf *pktbuf,
108 struct atp_block *atpb )
112 /* fill in the packet fields
114 hdr.atphd_ctrlinfo = ctrl;
115 hdr.atphd_bitmap = atpb->atp_bitmap;
116 hdr.atphd_tid = htons( tid );
117 *(pktbuf->atpbuf_info.atpbuf_data) = DDPTYPE_ATP;
118 memcpy(pktbuf->atpbuf_info.atpbuf_data + 1, &hdr, sizeof( struct atphdr ));
119 memcpy(pktbuf->atpbuf_info.atpbuf_data + ATP_HDRSIZE,
120 atpb->atp_sreqdata, atpb->atp_sreqdlen );
124 pktbuf->atpbuf_dlen = ATP_HDRSIZE + (size_t) atpb->atp_sreqdlen;
127 void atp_build_resp_packet( struct atpbuf *pktbuf,
130 struct atp_block *atpb,
135 /* fill in the packet fields */
136 *(pktbuf->atpbuf_info.atpbuf_data) = DDPTYPE_ATP;
137 hdr.atphd_ctrlinfo = ctrl;
138 hdr.atphd_bitmap = seqnum;
139 hdr.atphd_tid = htons( tid );
140 memcpy(pktbuf->atpbuf_info.atpbuf_data + 1, &hdr,
141 sizeof( struct atphdr ));
142 memcpy(pktbuf->atpbuf_info.atpbuf_data + ATP_HDRSIZE,
143 atpb->atp_sresiov[ seqnum ].iov_base,
144 atpb->atp_sresiov[ seqnum ].iov_len );
148 pktbuf->atpbuf_dlen = ATP_HDRSIZE + (size_t) atpb->atp_sresiov[ seqnum ].iov_len;
153 atp_recv_atp( ATP ah,
154 struct sockaddr_at *fromaddr,
161 Receive a packet from address fromaddr of the correct function type
162 and with the correct tid. fromaddr = AT_ANY... and function == ATP_TYPEANY
163 and tid == ATP_TIDANY can be used to wildcard match.
165 recv_atp returns the length of the packet received (or -1 if error)
166 The function code for the packet received is returned in *func (ATP_TREQ or
169 struct atpbuf *pq, *cq;
176 struct sockaddr_at faddr;
178 struct atpbuf *inbuf;
182 /* first check the queue
185 atp_print_bufuse( ah, "recv_atp checking queue" );
187 for ( pq = NULL, cq = ah->atph_queue; cq != NULL;
188 pq = cq, cq = cq->atpbuf_next ) {
189 memcpy(&ahdr, cq->atpbuf_info.atpbuf_data + 1,
190 sizeof( struct atphdr ));
191 rfunc = ahdr.atphd_ctrlinfo & ATP_FUNCMASK;
193 printf( "<%d> checking", getpid());
194 printf( " tid=%hu func=", ntohs( ahdr.atphd_tid ));
196 atp_print_addr( " from", &cq->atpbuf_addr );
199 if ((( tid & ahdr.atphd_tid ) == ahdr.atphd_tid ) &&
200 (( *func & rfunc ) == rfunc )
201 && at_addr_eq( fromaddr, &cq->atpbuf_addr )) {
206 /* we found one in the queue -- copy to rbuf
208 dlen = (int) cq->atpbuf_dlen;
210 memcpy( fromaddr, &cq->atpbuf_addr, sizeof( struct sockaddr_at ));
211 memcpy( rbuf, cq->atpbuf_info.atpbuf_data, cq->atpbuf_dlen );
213 /* remove packet from queue and free buffer
216 ah->atph_queue = NULL;
218 pq->atpbuf_next = cq->atpbuf_next;
224 /* we need to get it the net -- call on ddp to receive a packet
227 printf( "<%d>", getpid());
228 atp_print_addr( " waiting on address", &ah->atph_saddr );
229 printf( "\nfor tid=%hu func=", ntohs( tid ));
231 atp_print_addr( " from", fromaddr );
239 faddrlen = sizeof( struct sockaddr_at );
240 memset( &faddr, 0, sizeof( struct sockaddr_at ));
242 if (( recvlen = netddp_recvfrom( ah->atph_socket, rbuf,
244 (struct sockaddr *) &faddr,
248 memcpy( &ahdr, rbuf + 1, sizeof( struct atphdr ));
249 if ( recvlen >= ATP_HDRSIZE && *rbuf == DDPTYPE_ATP) {
250 /* this is a valid ATP packet -- check for a match */
251 rfunc = ahdr.atphd_ctrlinfo & ATP_FUNCMASK;
252 rtid = ahdr.atphd_tid;
254 printf( "<%d> got tid=%hu func=", getpid(), ntohs( rtid ));
256 atp_print_addr( " from", &faddr );
258 bprint( rbuf, recvlen );
260 if ( rfunc == ATP_TREL ) {
261 /* remove response from sent list */
262 for ( pq = NULL, cq = ah->atph_sent; cq != NULL;
263 pq = cq, cq = cq->atpbuf_next ) {
264 if ( at_addr_eq( &faddr, &cq->atpbuf_addr ) &&
265 cq->atpbuf_info.atpbuf_xo.atpxo_tid == ntohs( rtid ))
270 printf( "<%d> releasing transaction %hu\n", getpid(), ntohs( rtid ));
273 ah->atph_sent = cq->atpbuf_next;
275 pq->atpbuf_next = cq->atpbuf_next;
277 for ( i = 0; i < 8; ++i ) {
278 if ( cq->atpbuf_info.atpbuf_xo.atpxo_packet[ i ]
280 atp_free_buf ( cq->atpbuf_info.atpbuf_xo.atpxo_packet[ i ] );
286 } else if ((( tid & rtid ) == rtid ) &&
287 (( *func & rfunc ) == rfunc ) &&
288 at_addr_eq( fromaddr, &faddr )) { /* got what we wanted */
291 memcpy( fromaddr, &faddr, sizeof( struct sockaddr_at ));
294 /* add packet to incoming queue */
296 printf( "<%d> queuing incoming...\n", getpid() );
298 if (( inbuf = atp_alloc_buf()) == NULL ) {
301 memcpy( &inbuf->atpbuf_addr, &faddr,
302 sizeof( struct sockaddr_at ));
303 inbuf->atpbuf_next = ah->atph_queue;
304 inbuf->atpbuf_dlen = (size_t) recvlen;
305 memcpy( inbuf->atpbuf_info.atpbuf_data, rbuf, recvlen );
308 if ( !wait && dlen < 0 ) {
312 } while ( dlen < 0 );
318 int at_addr_eq( paddr, saddr )
319 struct sockaddr_at *paddr; /* primary address */
320 struct sockaddr_at *saddr; /* secondary address */
322 /* compare two atalk addresses -- only check the non-zero fields
323 of paddr against saddr.
324 return zero if not equal, non-zero if equal
326 return (( paddr->sat_port == ATADDR_ANYPORT || paddr->sat_port == saddr->sat_port )
327 && ( paddr->sat_addr.s_net == ATADDR_ANYNET ||
328 paddr->sat_addr.s_net == saddr->sat_addr.s_net )
329 && ( paddr->sat_addr.s_node == ATADDR_ANYNODE ||
330 paddr->sat_addr.s_node == saddr->sat_addr.s_node ));