2 * Copyright (c) 1999, Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/lib/libncp/sap.c,v 1.2 1999/10/29 12:59:59 bp Exp $
33 * $DragonFly: src/lib/libncp/sap.c,v 1.2 2003/06/17 04:26:50 dillon Exp $
38 #include <sys/types.h>
39 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <netipx/ipx.h>
48 * TODO: These should go to ipx headers
50 #define ipx_set_net(x,y) ((x).x_net.s_net[0] = (y).x_net.s_net[0]); \
51 ((x).x_net.s_net[1]=(y).x_net.s_net[1])
52 #define ipx_set_nullnet(x) ((x).x_net.s_net[0]=0); ((x).x_net.s_net[1]=0)
53 #define ipx_set_nullhost(x) ((x).x_host.s_host[0] = 0); \
54 ((x).x_host.s_host[1] = 0); ((x).x_host.s_host[2] = 0)
55 #define ipx_set_wildnet(x) ((x).x_net.s_net[0] = 0xFFFF); \
56 ((x).x_net.s_net[1]=0xFFFF)
57 #define ipx_set_wildhost(x) ((x).x_host.s_host[0] = 0xFFFF); \
58 ((x).x_host.s_host[1] = 0xFFFF); ((x).x_host.s_host[2] = 0xFFFF);
61 static struct sap_packet* sap_packet_alloc(int entries);
62 static int sap_size(int entries, u_short operation);
63 int (*sap_sendto_func)(void*,int,struct sockaddr_ipx*,int sock)=NULL;
66 sap_sendto(void* buffer, int size, struct sockaddr_ipx* daddr, int sock)
69 return sap_sendto_func(buffer,size,daddr,sock);
70 return sendto(sock, (char*)buffer, size, 0,
71 (struct sockaddr*)daddr, sizeof(*daddr));
74 static struct sap_packet*
75 sap_packet_alloc(int entries)
77 if (entries > IPX_SAP_MAX_ENTRIES)
80 (struct sap_packet*)malloc(sap_size(entries, IPX_SAP_GENERAL_RESPONSE));
84 sap_size(int entries, u_short operation)
89 case IPX_SAP_GENERAL_QUERY:
90 return entries == 1 ? IPX_SAP_REQUEST_LEN : 0;
91 case IPX_SAP_GENERAL_RESPONSE:
92 if (entries > IPX_SAP_MAX_ENTRIES)
94 return sizeof(struct sap_packet) + (entries - 1) * sizeof(struct sap_entry);
95 case IPX_SAP_NEAREST_QUERY:
96 return entries == 1 ? IPX_SAP_REQUEST_LEN : 0;
97 case IPX_SAP_NEAREST_RESPONSE:
98 return entries == 1 ? sizeof(struct sap_packet) : 0;
105 sap_copyname(char *dest, const char *src)
107 bzero(dest, IPX_SAP_SERVER_NAME_LEN);
108 strncpy(dest, src, IPX_SAP_SERVER_NAME_LEN - 1);
112 sap_rq_init(struct sap_rq* rq, int sock)
114 rq->buffer = sap_packet_alloc(IPX_SAP_MAX_ENTRIES);
115 if (rq->buffer == NULL)
118 rq->buffer->operation = htons(IPX_SAP_GENERAL_QUERY);
119 rq->dest_addr.sipx_family = AF_IPX;
120 rq->dest_addr.sipx_len = sizeof(struct sockaddr_ipx);
126 sap_rq_flush(struct sap_rq* rq)
130 if (rq->entries == 0)
132 result = sap_sendto(rq->buffer,
133 sap_size(rq->entries, ntohs(rq->buffer->operation)),
134 &rq->dest_addr, rq->sock);
140 sap_rq_general_query(struct sap_rq* rq, u_short ser_type)
142 struct sap_entry* sep;
145 rq->buffer->operation = htons(IPX_SAP_GENERAL_QUERY);
146 sep = rq->buffer->sap_entries + rq->entries++;
147 sep->server_type = htons(ser_type);
151 sap_rq_gns_request(struct sap_rq* rq, u_short ser_type)
153 struct sap_entry* sep;
156 rq->buffer->operation = htons(IPX_SAP_NEAREST_QUERY);
157 sep = rq->buffer->sap_entries + rq->entries++;
158 sep->server_type = htons(ser_type);
162 sap_rq_general_response(struct sap_rq* rq,u_short type,char *name,struct sockaddr_ipx* addr, u_short hops,int down_allow)
164 struct sap_entry* sep;
166 if (hops >= IPX_SAP_SERVER_DOWN && !down_allow) return;
167 if (rq->entries >= IPX_SAP_MAX_ENTRIES)
169 if (rq->buffer->operation != htons(IPX_SAP_GENERAL_RESPONSE)){
171 rq->buffer->operation = htons(IPX_SAP_GENERAL_RESPONSE);
173 sep = rq->buffer->sap_entries + rq->entries;
174 sep->server_type = htons(type);
175 sap_copyname(sep->server_name, name);
176 memcpy(&sep->ipx, &addr->sipx_addr, sizeof(struct ipx_addr));
177 sep->hops = htons(hops);
182 sap_rq_gns_response(struct sap_rq* rq,u_short type,char *name,struct sockaddr_ipx* addr,u_short hops)
184 struct sap_entry* sep;
186 if (hops >= IPX_SAP_SERVER_DOWN) return;
188 rq->buffer->operation = htons(IPX_SAP_NEAREST_RESPONSE);
189 sep = rq->buffer->sap_entries + rq->entries;
190 sep->server_type = htons(type);
191 sap_copyname(sep->server_name, name);
192 memcpy(&sep->ipx, &addr->sipx_addr, sizeof(struct ipx_addr));
193 sep->hops = htons(hops);
198 sap_rq_set_destination(struct sap_rq* rq,struct ipx_addr *dest)
201 memcpy(&rq->dest_addr.sipx_addr,dest,sizeof(struct ipx_addr));
205 sap_getsock(int *rsock) {
206 struct sockaddr_ipx sap_addr;
209 sock = socket(AF_IPX, SOCK_DGRAM, 0);
212 slen = sizeof(sap_addr);
213 bzero(&sap_addr, slen);
214 sap_addr.sipx_family = AF_IPX;
215 sap_addr.sipx_len = slen;
216 if (bind(sock, (struct sockaddr*)&sap_addr, slen) == -1) {
221 if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt)) != 0){
230 sap_recv(int sock,void *buf,int len,int flags, int timeout){
243 if ((result = select(sock + 1, &rd, &wr, &ex, &tv)) == -1) {
246 if (FD_ISSET(sock, &rd)) {
247 result = recv(sock, buf, len, flags);
256 sap_find_nearest(int server_type, struct sockaddr_ipx *daddr, char *server_name)
258 struct ipx_addr addr;
260 int sock, error, packets, len;
261 struct sap_packet *reply = (struct sap_packet*)&data;
262 struct sap_rq sap_rq;
264 error = sap_getsock(&sock);
267 bzero(&addr, sizeof(addr));
268 /* BAD: we should enum all ifs (and nets ?) */
269 if (ipx_iffind(NULL, &addr) != 0) {
270 return (EPROTONOSUPPORT);
272 ipx_set_wildhost(addr);
273 addr.x_port = htons(IPXPORT_SAP);
275 if (!sap_rq_init(&sap_rq, sock)) {
279 sap_rq_set_destination(&sap_rq, &addr);
280 sap_rq_gns_request(&sap_rq, server_type);
281 sap_rq_flush(&sap_rq);
284 len = sap_recv(sock, data, sizeof(data), 0, 1);
286 ntohs(reply->operation) == IPX_SAP_NEAREST_RESPONSE)
290 } while (packets > 0);
297 daddr->sipx_addr = reply->sap_entries[0].ipx;
298 daddr->sipx_family = AF_IPX;
299 daddr->sipx_len = sizeof(struct sockaddr_ipx);
300 sap_copyname(server_name, reply->sap_entries[0].server_name);