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 $
37 #include <sys/types.h>
38 #include <sys/socket.h>
40 #include <netipx/ipx.h>
46 * TODO: These should go to ipx headers
48 #define ipx_set_net(x,y) ((x).x_net.s_net[0] = (y).x_net.s_net[0]); \
49 ((x).x_net.s_net[1]=(y).x_net.s_net[1])
50 #define ipx_set_nullnet(x) ((x).x_net.s_net[0]=0); ((x).x_net.s_net[1]=0)
51 #define ipx_set_nullhost(x) ((x).x_host.s_host[0] = 0); \
52 ((x).x_host.s_host[1] = 0); ((x).x_host.s_host[2] = 0)
53 #define ipx_set_wildnet(x) ((x).x_net.s_net[0] = 0xFFFF); \
54 ((x).x_net.s_net[1]=0xFFFF)
55 #define ipx_set_wildhost(x) ((x).x_host.s_host[0] = 0xFFFF); \
56 ((x).x_host.s_host[1] = 0xFFFF); ((x).x_host.s_host[2] = 0xFFFF);
59 static struct sap_packet* sap_packet_alloc(int entries);
60 static int sap_size(int entries, u_short operation);
61 int (*sap_sendto_func)(void*,int,struct sockaddr_ipx*,int sock)=NULL;
64 sap_sendto(void* buffer, int size, struct sockaddr_ipx* daddr, int sock)
67 return sap_sendto_func(buffer,size,daddr,sock);
68 return sendto(sock, (char*)buffer, size, 0,
69 (struct sockaddr*)daddr, sizeof(*daddr));
72 static struct sap_packet*
73 sap_packet_alloc(int entries)
75 if (entries > IPX_SAP_MAX_ENTRIES)
78 (struct sap_packet*)malloc(sap_size(entries, IPX_SAP_GENERAL_RESPONSE));
82 sap_size(int entries, u_short operation)
87 case IPX_SAP_GENERAL_QUERY:
88 return entries == 1 ? IPX_SAP_REQUEST_LEN : 0;
89 case IPX_SAP_GENERAL_RESPONSE:
90 if (entries > IPX_SAP_MAX_ENTRIES)
92 return sizeof(struct sap_packet) + (entries - 1) * sizeof(struct sap_entry);
93 case IPX_SAP_NEAREST_QUERY:
94 return entries == 1 ? IPX_SAP_REQUEST_LEN : 0;
95 case IPX_SAP_NEAREST_RESPONSE:
96 return entries == 1 ? sizeof(struct sap_packet) : 0;
103 sap_copyname(char *dest, const char *src)
105 bzero(dest, IPX_SAP_SERVER_NAME_LEN);
106 strncpy(dest, src, IPX_SAP_SERVER_NAME_LEN - 1);
110 sap_rq_init(struct sap_rq* rq, int sock)
112 rq->buffer = sap_packet_alloc(IPX_SAP_MAX_ENTRIES);
113 if (rq->buffer == NULL)
116 rq->buffer->operation = htons(IPX_SAP_GENERAL_QUERY);
117 rq->dest_addr.sipx_family = AF_IPX;
118 rq->dest_addr.sipx_len = sizeof(struct sockaddr_ipx);
124 sap_rq_flush(struct sap_rq* rq)
128 if (rq->entries == 0)
130 result = sap_sendto(rq->buffer,
131 sap_size(rq->entries, ntohs(rq->buffer->operation)),
132 &rq->dest_addr, rq->sock);
138 sap_rq_general_query(struct sap_rq* rq, u_short ser_type)
140 struct sap_entry* sep;
143 rq->buffer->operation = htons(IPX_SAP_GENERAL_QUERY);
144 sep = rq->buffer->sap_entries + rq->entries++;
145 sep->server_type = htons(ser_type);
149 sap_rq_gns_request(struct sap_rq* rq, u_short ser_type)
151 struct sap_entry* sep;
154 rq->buffer->operation = htons(IPX_SAP_NEAREST_QUERY);
155 sep = rq->buffer->sap_entries + rq->entries++;
156 sep->server_type = htons(ser_type);
160 sap_rq_general_response(struct sap_rq* rq,u_short type,char *name,struct sockaddr_ipx* addr, u_short hops,int down_allow)
162 struct sap_entry* sep;
164 if (hops >= IPX_SAP_SERVER_DOWN && !down_allow) return;
165 if (rq->entries >= IPX_SAP_MAX_ENTRIES)
167 if (rq->buffer->operation != htons(IPX_SAP_GENERAL_RESPONSE)){
169 rq->buffer->operation = htons(IPX_SAP_GENERAL_RESPONSE);
171 sep = rq->buffer->sap_entries + rq->entries;
172 sep->server_type = htons(type);
173 sap_copyname(sep->server_name, name);
174 memcpy(&sep->ipx, &addr->sipx_addr, sizeof(struct ipx_addr));
175 sep->hops = htons(hops);
180 sap_rq_gns_response(struct sap_rq* rq,u_short type,char *name,struct sockaddr_ipx* addr,u_short hops)
182 struct sap_entry* sep;
184 if (hops >= IPX_SAP_SERVER_DOWN) return;
186 rq->buffer->operation = htons(IPX_SAP_NEAREST_RESPONSE);
187 sep = rq->buffer->sap_entries + rq->entries;
188 sep->server_type = htons(type);
189 sap_copyname(sep->server_name, name);
190 memcpy(&sep->ipx, &addr->sipx_addr, sizeof(struct ipx_addr));
191 sep->hops = htons(hops);
196 sap_rq_set_destination(struct sap_rq* rq,struct ipx_addr *dest)
199 memcpy(&rq->dest_addr.sipx_addr,dest,sizeof(struct ipx_addr));
203 sap_getsock(int *rsock) {
204 struct sockaddr_ipx sap_addr;
207 sock = socket(AF_IPX, SOCK_DGRAM, 0);
210 slen = sizeof(sap_addr);
211 bzero(&sap_addr, slen);
212 sap_addr.sipx_family = AF_IPX;
213 sap_addr.sipx_len = slen;
214 if (bind(sock, (struct sockaddr*)&sap_addr, slen) == -1) {
219 if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt)) != 0){
228 sap_recv(int sock,void *buf,int len,int flags, int timeout){
241 if ((result = select(sock + 1, &rd, &wr, &ex, &tv)) == -1) {
244 if (FD_ISSET(sock, &rd)) {
245 result = recv(sock, buf, len, flags);
254 sap_find_nearest(int server_type, struct sockaddr_ipx *daddr, char *server_name)
256 struct ipx_addr addr;
258 int sock, error, packets, len;
259 struct sap_packet *reply = (struct sap_packet*)&data;
260 struct sap_rq sap_rq;
262 error = sap_getsock(&sock);
265 bzero(&addr, sizeof(addr));
266 /* BAD: we should enum all ifs (and nets ?) */
267 if (ipx_iffind(NULL, &addr) != 0) {
268 return (EPROTONOSUPPORT);
270 ipx_set_wildhost(addr);
271 addr.x_port = htons(IPXPORT_SAP);
273 if (!sap_rq_init(&sap_rq, sock)) {
277 sap_rq_set_destination(&sap_rq, &addr);
278 sap_rq_gns_request(&sap_rq, server_type);
279 sap_rq_flush(&sap_rq);
282 len = sap_recv(sock, data, sizeof(data), 0, 1);
284 ntohs(reply->operation) == IPX_SAP_NEAREST_RESPONSE)
288 } while (packets > 0);
295 daddr->sipx_addr = reply->sap_entries[0].ipx;
296 daddr->sipx_family = AF_IPX;
297 daddr->sipx_len = sizeof(struct sockaddr_ipx);
298 sap_copyname(server_name, reply->sap_entries[0].server_name);