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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** |
29 | /** |
30 | * @file ns.c |
30 | * @file ns.c |
31 | * @brief Naming service for HelenOS IPC. |
31 | * @brief Naming service for HelenOS IPC. |
32 | */ |
32 | */ |
33 | 33 | ||
34 | #include <ipc/ipc.h> |
34 | #include <ipc/ipc.h> |
35 | #include <ipc/ns.h> |
35 | #include <ipc/ns.h> |
36 | #include <stdio.h> |
36 | #include <stdio.h> |
37 | #include <unistd.h> |
37 | #include <unistd.h> |
38 | #include <stdlib.h> |
38 | #include <stdlib.h> |
39 | #include <errno.h> |
39 | #include <errno.h> |
40 | #include <assert.h> |
40 | #include <assert.h> |
41 | #include <libadt/list.h> |
41 | #include <libadt/list.h> |
42 | #include <libadt/hash_table.h> |
42 | #include <libadt/hash_table.h> |
43 | 43 | ||
44 | #define NAME "NS" |
44 | #define NAME "NS" |
45 | 45 | ||
46 | #define NS_HASH_TABLE_CHAINS 20 |
46 | #define NS_HASH_TABLE_CHAINS 20 |
47 | 47 | ||
48 | static int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call); |
48 | static int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call); |
49 | static int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid); |
49 | static int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid); |
50 | 50 | ||
51 | /* Static functions implementing NS hash table operations. */ |
51 | /* Static functions implementing NS hash table operations. */ |
52 | static hash_index_t ns_hash(unsigned long *key); |
52 | static hash_index_t ns_hash(unsigned long *key); |
53 | static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item); |
53 | static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item); |
54 | static void ns_remove(link_t *item); |
54 | static void ns_remove(link_t *item); |
55 | 55 | ||
56 | /** Operations for NS hash table. */ |
56 | /** Operations for NS hash table. */ |
57 | static hash_table_operations_t ns_hash_table_ops = { |
57 | static hash_table_operations_t ns_hash_table_ops = { |
58 | .hash = ns_hash, |
58 | .hash = ns_hash, |
59 | .compare = ns_compare, |
59 | .compare = ns_compare, |
60 | .remove_callback = ns_remove |
60 | .remove_callback = ns_remove |
61 | }; |
61 | }; |
62 | 62 | ||
63 | /** NS hash table structure. */ |
63 | /** NS hash table structure. */ |
64 | static hash_table_t ns_hash_table; |
64 | static hash_table_t ns_hash_table; |
65 | 65 | ||
66 | /** NS hash table item. */ |
66 | /** NS hash table item. */ |
67 | typedef struct { |
67 | typedef struct { |
68 | link_t link; |
68 | link_t link; |
69 | ipcarg_t service; /**< Number of the service. */ |
69 | ipcarg_t service; /**< Number of the service. */ |
70 | ipcarg_t phone; /**< Phone registered with the service. */ |
70 | ipcarg_t phone; /**< Phone registered with the service. */ |
71 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
71 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
72 | } hashed_service_t; |
72 | } hashed_service_t; |
73 | 73 | ||
74 | int static ping_phone; |
74 | int static ping_phone; |
75 | 75 | ||
76 | int main(int argc, char **argv) |
76 | int main(int argc, char **argv) |
77 | { |
77 | { |
78 | ipc_call_t call; |
78 | ipc_call_t call; |
79 | ipc_callid_t callid; |
79 | ipc_callid_t callid; |
80 | char *as; |
80 | char *as; |
81 | 81 | ||
82 | ipcarg_t retval, arg1, arg2; |
82 | ipcarg_t retval, arg1, arg2; |
83 | 83 | ||
84 | printf("%s: Naming service started.\n", NAME); |
84 | printf("%s: Naming service started.\n", NAME); |
85 | 85 | ||
86 | if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 3, &ns_hash_table_ops)) { |
86 | if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 3, &ns_hash_table_ops)) { |
87 | printf("%s: cannot create hash table\n", NAME); |
87 | printf("%s: cannot create hash table\n", NAME); |
88 | return ENOMEM; |
88 | return ENOMEM; |
89 | } |
89 | } |
90 | 90 | ||
91 | while (1) { |
91 | while (1) { |
92 | callid = ipc_wait_for_call(&call, 0); |
92 | callid = ipc_wait_for_call(&call, 0); |
93 | // printf("NS: Call in_phone_hash=%lX...", call.in_phone_hash); |
93 | // printf("NS: Call in_phone_hash=%lX...", call.in_phone_hash); |
94 | switch (IPC_GET_METHOD(call)) { |
94 | switch (IPC_GET_METHOD(call)) { |
95 | case IPC_M_AS_SEND: |
95 | case IPC_M_AS_SEND: |
96 | as = (char *)IPC_GET_ARG2(call); |
96 | as = (char *)IPC_GET_ARG2(call); |
97 | printf("Received as: %P, size:%d\n", as, IPC_GET_ARG3(call)); |
97 | printf("Received as: %P, size:%d\n", as, IPC_GET_ARG3(call)); |
98 | retval = ipc_answer_fast(callid, 0,(sysarg_t)(1024*1024), 0); |
98 | retval = ipc_answer_fast(callid, 0,(sysarg_t)(1024*1024), 0); |
99 | if (!retval) { |
99 | if (!retval) { |
100 | printf("Reading shared memory..."); |
100 | printf("Reading shared memory..."); |
101 | printf("Text: %s", as); |
101 | printf("Text: %s", as); |
102 | } else |
102 | } else |
103 | printf("Failed answer: %d\n", retval); |
103 | printf("Failed answer: %d\n", retval); |
104 | continue; |
104 | continue; |
105 | break; |
105 | break; |
106 | case IPC_M_INTERRUPT: |
106 | case IPC_M_INTERRUPT: |
107 | printf("GOT INTERRUPT: %c\n", IPC_GET_ARG2(call)); |
107 | printf("GOT INTERRUPT: %c\n", IPC_GET_ARG2(call)); |
108 | break; |
108 | break; |
109 | case IPC_M_PHONE_HUNGUP: |
109 | case IPC_M_PHONE_HUNGUP: |
110 | printf("Phone hung up.\n"); |
110 | printf("Phone hung up.\n"); |
111 | retval = 0; |
111 | retval = 0; |
112 | break; |
112 | break; |
113 | case IPC_M_CONNECT_TO_ME: |
113 | case IPC_M_CONNECT_TO_ME: |
114 | /* |
114 | /* |
115 | * Server requests service registration. |
115 | * Server requests service registration. |
116 | */ |
116 | */ |
117 | retval = register_service(IPC_GET_ARG1(call), IPC_GET_ARG3(call), &call); |
117 | retval = register_service(IPC_GET_ARG1(call), IPC_GET_ARG3(call), &call); |
118 | ping_phone = IPC_GET_ARG3(call); |
118 | ping_phone = IPC_GET_ARG3(call); |
119 | break; |
119 | break; |
120 | case IPC_M_CONNECT_ME_TO: |
120 | case IPC_M_CONNECT_ME_TO: |
121 | /* |
121 | /* |
122 | * Client requests to be connected to a service. |
122 | * Client requests to be connected to a service. |
123 | */ |
123 | */ |
124 | retval = connect_to_service(IPC_GET_ARG1(call), &call, callid); |
124 | retval = connect_to_service(IPC_GET_ARG1(call), &call, callid); |
125 | break; |
125 | break; |
126 | case NS_HANGUP: |
126 | case NS_HANGUP: |
127 | printf("Closing connection.\n"); |
127 | printf("Closing connection.\n"); |
128 | retval = EHANGUP; |
128 | retval = EHANGUP; |
129 | break; |
129 | break; |
130 | case NS_PING: |
130 | case NS_PING: |
131 | printf("Ping...%P %P\n", IPC_GET_ARG1(call), |
131 | printf("Ping...%P %P\n", IPC_GET_ARG1(call), |
132 | IPC_GET_ARG2(call)); |
132 | IPC_GET_ARG2(call)); |
133 | retval = 0; |
133 | retval = 0; |
134 | arg1 = 0xdead; |
134 | arg1 = 0xdead; |
135 | arg2 = 0xbeef; |
135 | arg2 = 0xbeef; |
136 | break; |
136 | break; |
137 | case NS_PING_SVC: |
137 | case NS_PING_SVC: |
138 | printf("NS:Pinging service %d\n", ping_phone); |
138 | printf("NS:Pinging service %d\n", ping_phone); |
139 | ipc_call_sync(ping_phone, NS_PING, 0xbeef, 0); |
139 | ipc_call_sync(ping_phone, NS_PING, 0xbeef, 0); |
140 | printf("NS:Got pong\n"); |
140 | printf("NS:Got pong\n"); |
141 | break; |
141 | break; |
142 | default: |
142 | default: |
143 | printf("Unknown method: %zd\n", IPC_GET_METHOD(call)); |
143 | printf("Unknown method: %zd\n", IPC_GET_METHOD(call)); |
144 | retval = ENOENT; |
144 | retval = ENOENT; |
145 | break; |
145 | break; |
146 | } |
146 | } |
147 | if (! (callid & IPC_CALLID_NOTIFICATION)) { |
147 | if (! (callid & IPC_CALLID_NOTIFICATION)) { |
148 | // printf("Answering.\n"); |
148 | // printf("Answering.\n"); |
149 | ipc_answer_fast(callid, retval, arg1, arg2); |
149 | ipc_answer_fast(callid, retval, arg1, arg2); |
150 | } |
150 | } |
151 | } |
151 | } |
152 | } |
152 | } |
153 | 153 | ||
154 | /** Register service. |
154 | /** Register service. |
155 | * |
155 | * |
156 | * @param service Service to be registered. |
156 | * @param service Service to be registered. |
157 | * @param phone phone Phone to be used for connections to the service. |
157 | * @param phone phone Phone to be used for connections to the service. |
158 | * @param call Pointer to call structure. |
158 | * @param call Pointer to call structure. |
159 | * |
159 | * |
160 | * @return Zero on success or a value from @ref errno.h. |
160 | * @return Zero on success or a value from @ref errno.h. |
161 | */ |
161 | */ |
162 | int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call) |
162 | int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call) |
163 | { |
163 | { |
164 | unsigned long keys[3] = { service, call->in_phone_hash, 0 }; |
164 | unsigned long keys[3] = { service, call->in_phone_hash, 0 }; |
165 | hashed_service_t *hs; |
165 | hashed_service_t *hs; |
166 | 166 | ||
167 | printf("Registering service %d on phone %d...", service, phone); |
167 | printf("Registering service %d on phone %d...", service, phone); |
168 | 168 | ||
169 | if (hash_table_find(&ns_hash_table, keys)) { |
169 | if (hash_table_find(&ns_hash_table, keys)) { |
170 | printf("Service %d already registered.\n", service); |
170 | printf("Service %d already registered.\n", service); |
171 | return EEXISTS; |
171 | return EEXISTS; |
172 | } |
172 | } |
173 | 173 | ||
174 | hs = (hashed_service_t *) malloc(sizeof(hashed_service_t)); |
174 | hs = (hashed_service_t *) malloc(sizeof(hashed_service_t)); |
175 | if (!hs) { |
175 | if (!hs) { |
176 | printf("Failed to register service %d.\n", service); |
176 | printf("Failed to register service %d.\n", service); |
177 | return ENOMEM; |
177 | return ENOMEM; |
178 | } |
178 | } |
179 | 179 | ||
180 | link_initialize(&hs->link); |
180 | link_initialize(&hs->link); |
181 | hs->service = service; |
181 | hs->service = service; |
182 | hs->phone = phone; |
182 | hs->phone = phone; |
183 | hs->in_phone_hash = call->in_phone_hash; |
183 | hs->in_phone_hash = call->in_phone_hash; |
184 | hash_table_insert(&ns_hash_table, keys, &hs->link); |
184 | hash_table_insert(&ns_hash_table, keys, &hs->link); |
185 | 185 | ||
186 | return 0; |
186 | return 0; |
187 | } |
187 | } |
188 | 188 | ||
189 | /** Connect client to service. |
189 | /** Connect client to service. |
190 | * |
190 | * |
191 | * @param service Service to be connected to. |
191 | * @param service Service to be connected to. |
192 | * @param call Pointer to call structure. |
192 | * @param call Pointer to call structure. |
193 | * @param callid Call ID of the request. |
193 | * @param callid Call ID of the request. |
194 | * |
194 | * |
195 | * @return Zero on success or a value from @ref errno.h. |
195 | * @return Zero on success or a value from @ref errno.h. |
196 | */ |
196 | */ |
197 | int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid) |
197 | int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid) |
198 | { |
198 | { |
199 | unsigned long keys[3] = { service, 0, 0 }; |
199 | unsigned long keys[3] = { service, 0, 0 }; |
200 | link_t *hlp; |
200 | link_t *hlp; |
201 | hashed_service_t *hs; |
201 | hashed_service_t *hs; |
202 | 202 | ||
203 | hlp = hash_table_find(&ns_hash_table, keys); |
203 | hlp = hash_table_find(&ns_hash_table, keys); |
204 | if (!hlp) { |
204 | if (!hlp) { |
205 | // printf("Service %d not registered.\n", service); |
205 | // printf("Service %d not registered.\n", service); |
206 | return ENOENT; |
206 | return ENOENT; |
207 | } |
207 | } |
208 | hs = hash_table_get_instance(hlp, hashed_service_t, link); |
208 | hs = hash_table_get_instance(hlp, hashed_service_t, link); |
209 | printf("Connecting in_phone_hash=%lX to service at phone %d...", call->in_phone_hash, hs->phone); |
209 | printf("Connecting in_phone_hash=%lX to service at phone %d...", call->in_phone_hash, hs->phone); |
210 | return ipc_forward_fast(callid, hs->phone, 0, 0); |
210 | return ipc_forward_fast(callid, hs->phone, 0, 0); |
211 | } |
211 | } |
212 | 212 | ||
213 | /** Compute hash index into NS hash table. |
213 | /** Compute hash index into NS hash table. |
214 | * |
214 | * |
215 | * @param key Pointer keys. However, only the first key (i.e. service number) |
215 | * @param key Pointer keys. However, only the first key (i.e. service number) |
216 | * is used to compute the hash index. |
216 | * is used to compute the hash index. |
217 | * @return Hash index corresponding to key[0]. |
217 | * @return Hash index corresponding to key[0]. |
218 | */ |
218 | */ |
219 | hash_index_t ns_hash(unsigned long *key) |
219 | hash_index_t ns_hash(unsigned long *key) |
220 | { |
220 | { |
221 | assert(key); |
221 | assert(key); |
222 | return *key % NS_HASH_TABLE_CHAINS; |
222 | return *key % NS_HASH_TABLE_CHAINS; |
223 | } |
223 | } |
224 | 224 | ||
225 | /** Compare a key with hashed item. |
225 | /** Compare a key with hashed item. |
226 | * |
226 | * |
227 | * This compare function always ignores the third key. |
227 | * This compare function always ignores the third key. |
228 | * It exists only to make it possible to remove records |
228 | * It exists only to make it possible to remove records |
229 | * originating from connection with key[1] in_phone_hash |
229 | * originating from connection with key[1] in_phone_hash |
230 | * value. Note that this is close to being classified |
230 | * value. Note that this is close to being classified |
231 | * as a nasty hack. |
231 | * as a nasty hack. |
232 | * |
232 | * |
233 | * @param key Array of keys. |
233 | * @param key Array of keys. |
234 | * @param keys Must be lesser or equal to 3. |
234 | * @param keys Must be lesser or equal to 3. |
235 | * @param item Pointer to a hash table item. |
235 | * @param item Pointer to a hash table item. |
236 | * @return Non-zero if the key matches the item, zero otherwise. |
236 | * @return Non-zero if the key matches the item, zero otherwise. |
237 | */ |
237 | */ |
238 | int ns_compare(unsigned long key[], hash_count_t keys, link_t *item) |
238 | int ns_compare(unsigned long key[], hash_count_t keys, link_t *item) |
239 | { |
239 | { |
240 | hashed_service_t *hs; |
240 | hashed_service_t *hs; |
241 | 241 | ||
242 | assert(key); |
242 | assert(key); |
243 | assert(keys <= 3); |
243 | assert(keys <= 3); |
244 | assert(item); |
244 | assert(item); |
245 | 245 | ||
246 | hs = hash_table_get_instance(item, hashed_service_t, link); |
246 | hs = hash_table_get_instance(item, hashed_service_t, link); |
247 | 247 | ||
248 | if (keys == 2) |
248 | if (keys == 2) |
249 | return key[1] == hs->in_phone_hash; |
249 | return key[1] == hs->in_phone_hash; |
250 | else |
250 | else |
251 | return key[0] == hs->service; |
251 | return key[0] == hs->service; |
252 | } |
252 | } |
253 | 253 | ||
254 | /** Perform actions after removal of item from the hash table. |
254 | /** Perform actions after removal of item from the hash table. |
255 | * |
255 | * |
256 | * @param item Item that was removed from the hash table. |
256 | * @param item Item that was removed from the hash table. |
257 | */ |
257 | */ |
258 | void ns_remove(link_t *item) |
258 | void ns_remove(link_t *item) |
259 | { |
259 | { |
260 | assert(item); |
260 | assert(item); |
261 | free(hash_table_get_instance(item, hashed_service_t, link)); |
261 | free(hash_table_get_instance(item, hashed_service_t, link)); |
262 | } |
262 | } |
263 | 263 |