0,0 → 1,375 |
/* |
* Copyright (c) 2008 Jiri Svoboda |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup trace |
* @{ |
*/ |
/** @file |
*/ |
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#include <stdio.h> |
#include <stdlib.h> |
#include <libadt/hash_table.h> |
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#include "ipc_desc.h" |
#include "proto.h" |
#include "trace.h" |
#include "ipcp.h" |
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#define IPCP_CALLID_SYNC 0 |
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typedef struct { |
ipcarg_t phone_hash; |
ipc_call_t question; |
oper_t *oper; |
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ipc_callid_t call_hash; |
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link_t link; |
} pending_call_t; |
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typedef struct { |
int server; |
proto_t *proto; |
} connection_t; |
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#define MAX_PHONE 64 |
connection_t connections[MAX_PHONE]; |
int have_conn[MAX_PHONE]; |
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#define PCALL_TABLE_CHAINS 32 |
hash_table_t pending_calls; |
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/* |
* Pseudo-protocols |
*/ |
proto_t *proto_system; /**< Protocol describing system IPC methods. */ |
proto_t *proto_unknown; /**< Protocol with no known methods. */ |
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static hash_index_t pending_call_hash(unsigned long key[]); |
static int pending_call_compare(unsigned long key[], hash_count_t keys, |
link_t *item); |
static void pending_call_remove_callback(link_t *item); |
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hash_table_operations_t pending_call_ops = { |
.hash = pending_call_hash, |
.compare = pending_call_compare, |
.remove_callback = pending_call_remove_callback |
}; |
|
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static hash_index_t pending_call_hash(unsigned long key[]) |
{ |
// printf("pending_call_hash\n"); |
return key[0] % PCALL_TABLE_CHAINS; |
} |
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static int pending_call_compare(unsigned long key[], hash_count_t keys, |
link_t *item) |
{ |
pending_call_t *hs; |
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// printf("pending_call_compare\n"); |
hs = hash_table_get_instance(item, pending_call_t, link); |
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// FIXME: this will fail if sizeof(long) < sizeof(void *). |
return key[0] == hs->call_hash; |
} |
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static void pending_call_remove_callback(link_t *item) |
{ |
// printf("pending_call_remove_callback\n"); |
} |
|
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void ipcp_connection_set(int phone, int server, proto_t *proto) |
{ |
if (phone <0 || phone >= MAX_PHONE) return; |
connections[phone].server = server; |
connections[phone].proto = proto; |
have_conn[phone] = 1; |
} |
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void ipcp_connection_clear(int phone) |
{ |
have_conn[phone] = 0; |
connections[phone].server = 0; |
connections[phone].proto = NULL; |
} |
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static void ipc_m_print(proto_t *proto, ipcarg_t method) |
{ |
oper_t *oper; |
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/* Try system methods first */ |
oper = proto_get_oper(proto_system, method); |
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if (oper == NULL && proto != NULL) { |
/* Not a system method, try the user protocol. */ |
oper = proto_get_oper(proto, method); |
} |
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if (oper != NULL) { |
printf("%s (%ld)", oper->name, method); |
return; |
} |
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printf("%ld", method); |
} |
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void ipcp_init(void) |
{ |
ipc_m_desc_t *desc; |
oper_t *oper; |
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val_type_t arg_def[OPER_MAX_ARGS] = { |
V_INTEGER, |
V_INTEGER, |
V_INTEGER, |
V_INTEGER, |
V_INTEGER |
}; |
|
/* |
* Create a pseudo-protocol 'unknown' that has no known methods. |
*/ |
proto_unknown = proto_new("unknown"); |
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/* |
* Create a pseudo-protocol 'system' defining names of system IPC |
* methods. |
*/ |
proto_system = proto_new("system"); |
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desc = ipc_methods; |
while (desc->number != 0) { |
oper = oper_new(desc->name, OPER_MAX_ARGS, arg_def, V_INTEGER, |
OPER_MAX_ARGS, arg_def); |
proto_add_oper(proto_system, desc->number, oper); |
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++desc; |
} |
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hash_table_create(&pending_calls, PCALL_TABLE_CHAINS, 1, &pending_call_ops); |
} |
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void ipcp_cleanup(void) |
{ |
proto_delete(proto_system); |
hash_table_destroy(&pending_calls); |
} |
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void ipcp_call_out(int phone, ipc_call_t *call, ipc_callid_t hash) |
{ |
pending_call_t *pcall; |
proto_t *proto; |
unsigned long key[1]; |
oper_t *oper; |
ipcarg_t *args; |
int i; |
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if (have_conn[phone]) proto = connections[phone].proto; |
else proto = NULL; |
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args = call->args; |
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if ((display_mask & DM_IPC) != 0) { |
printf("Call ID: 0x%lx, phone: %d, proto: %s, method: ", hash, |
phone, (proto ? proto->name : "n/a")); |
ipc_m_print(proto, IPC_GET_METHOD(*call)); |
printf(" args: (%lu, %lu, %lu, %lu, %lu)\n", args[1], args[2], |
args[3], args[4], args[5]); |
} |
|
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if ((display_mask & DM_USER) != 0) { |
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if (proto != NULL) { |
oper = proto_get_oper(proto, IPC_GET_METHOD(*call)); |
} else { |
oper = NULL; |
} |
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if (oper != NULL) { |
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printf("%s(%d).%s", (proto ? proto->name : "n/a"), |
phone, (oper ? oper->name : "unknown")); |
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putchar('('); |
for (i = 1; i <= oper->argc; ++i) { |
if (i > 1) printf(", "); |
val_print(args[i], oper->arg_type[i - 1]); |
} |
putchar(')'); |
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if (oper->rv_type == V_VOID && oper->respc == 0) { |
/* |
* No response data (typically the task will |
* not be interested in the response). |
* We will not display response. |
*/ |
putchar('.'); |
} |
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putchar('\n'); |
} |
} else { |
oper = NULL; |
} |
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/* Store call in hash table for response matching */ |
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pcall = malloc(sizeof(pending_call_t)); |
pcall->phone_hash = phone; |
pcall->question = *call; |
pcall->call_hash = hash; |
pcall->oper = oper; |
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key[0] = hash; |
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hash_table_insert(&pending_calls, key, &pcall->link); |
} |
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static void parse_answer(ipc_callid_t hash, pending_call_t *pcall, |
ipc_call_t *answer) |
{ |
ipcarg_t phone; |
ipcarg_t method; |
ipcarg_t service; |
ipcarg_t retval; |
proto_t *proto; |
int cphone; |
|
ipcarg_t *resp; |
oper_t *oper; |
int i; |
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// printf("parse_answer\n"); |
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phone = pcall->phone_hash; |
method = IPC_GET_METHOD(pcall->question); |
retval = IPC_GET_RETVAL(*answer); |
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resp = answer->args; |
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if ((display_mask & DM_IPC) != 0) { |
printf("Response to 0x%lx: retval=%ld, args = (%lu, %lu, %lu, %lu, %lu)\n", |
hash, retval, IPC_GET_ARG1(*answer), |
IPC_GET_ARG2(*answer), IPC_GET_ARG3(*answer), |
IPC_GET_ARG4(*answer), IPC_GET_ARG5(*answer)); |
} |
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if ((display_mask & DM_USER) != 0) { |
oper = pcall->oper; |
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if (oper != NULL && (oper->rv_type != V_VOID || oper->respc > 0)) { |
printf("->"); |
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if (oper->rv_type != V_VOID) { |
putchar(' '); |
val_print(retval, oper->rv_type); |
} |
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if (oper->respc > 0) { |
putchar(' '); |
putchar('('); |
for (i = 1; i <= oper->respc; ++i) { |
if (i > 1) printf(", "); |
val_print(resp[i], oper->resp_type[i - 1]); |
} |
putchar(')'); |
} |
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putchar('\n'); |
} |
} |
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if (phone == 0 && method == IPC_M_CONNECT_ME_TO && retval == 0) { |
/* Connected to a service (through NS) */ |
service = IPC_GET_ARG1(pcall->question); |
proto = proto_get_by_srv(service); |
if (proto == NULL) proto = proto_unknown; |
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cphone = IPC_GET_ARG5(*answer); |
if ((display_mask & DM_SYSTEM) != 0) { |
printf("Registering connection (phone %d, protocol: %s)\n", cphone, |
proto->name); |
} |
ipcp_connection_set(cphone, 0, proto); |
} |
} |
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void ipcp_call_in(ipc_call_t *call, ipc_callid_t hash) |
{ |
link_t *item; |
pending_call_t *pcall; |
unsigned long key[1]; |
|
// printf("ipcp_call_in()\n"); |
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if ((hash & IPC_CALLID_ANSWERED) == 0 && hash != IPCP_CALLID_SYNC) { |
/* Not a response */ |
if ((display_mask & DM_IPC) != 0) { |
printf("Not a response (hash 0x%lx)\n", hash); |
} |
return; |
} |
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hash = hash & ~IPC_CALLID_ANSWERED; |
key[0] = hash; |
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item = hash_table_find(&pending_calls, key); |
if (item == NULL) return; // No matching question found |
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/* |
* Response matched to question. |
*/ |
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pcall = hash_table_get_instance(item, pending_call_t, link); |
hash_table_remove(&pending_calls, key, 1); |
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parse_answer(hash, pcall, call); |
free(pcall); |
} |
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void ipcp_call_sync(int phone, ipc_call_t *call, ipc_call_t *answer) |
{ |
ipcp_call_out(phone, call, IPCP_CALLID_SYNC); |
ipcp_call_in(answer, IPCP_CALLID_SYNC); |
} |
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void ipcp_hangup(int phone, int rc) |
{ |
if ((display_mask & DM_SYSTEM) != 0) { |
printf("Hang phone %d up -> %d\n", phone, rc); |
ipcp_connection_clear(phone); |
} |
} |
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/** @} |
*/ |