/** @addtogroup sctrace
* @{
*/
/** @file
*/
#include <stdio.h>
#include <stdlib.h>
#include <libadt/hash_table.h>
#include "ipc_desc.h"
#include "ipcp.h"
#define IPCP_CALLID_SYNC 0
typedef struct {
int phone_hash;
ipc_call_t question;
int call_hash;
link_t link;
} pending_call_t;
typedef struct {
int server;
proto_t *proto;
} connection_t;
#define MAX_PHONE 64
connection_t connections[MAX_PHONE];
int have_conn[MAX_PHONE];
#define PCALL_TABLE_CHAINS 32
hash_table_t pending_calls;
hash_index_t pending_call_hash(unsigned long key[])
{
// printf("pending_call_hash\n");
return key[0] % PCALL_TABLE_CHAINS;
}
int pending_call_compare(unsigned long key[], hash_count_t keys,
link_t *item)
{
pending_call_t *hs;
// printf("pending_call_compare\n");
hs = hash_table_get_instance(item, pending_call_t, link);
return key[0] == hs->call_hash;
}
void pending_call_remove_callback(link_t *item)
{
// printf("pending_call_remove_callback\n");
}
hash_table_operations_t pending_call_ops = {
.hash = pending_call_hash,
.compare = pending_call_compare,
.remove_callback = pending_call_remove_callback
};
static void 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;
}
static void connection_clear(int phone)
{
have_conn[phone] = 0;
connections[phone].server = 0;
connections[phone].proto = NULL;
}
static void ipc_m_print(ipcarg_t method)
{
ipc_m_desc_t *desc;
/* FIXME: too slow */
desc = ipc_methods;
while (desc->number != 0) {
if (desc->number == method) {
printf("%s (%d)", desc
->name
, method
); return;
}
++desc;
}
}
void ipcp_init(void)
{
hash_table_create(&pending_calls, PCALL_TABLE_CHAINS, 1, &pending_call_ops);
}
void ipcp_cleanup(void)
{
hash_table_destroy(&pending_calls);
}
void ipcp_call_out(int phone, ipc_call_t *call, ipc_callid_t hash)
{
pending_call_t *pcall;
char *proto_name;
if (have_conn[phone]) proto_name = connections[phone].proto->name;
else proto_name = "n/a";
// printf("ipcp_call_out()\n");
printf("call id: 0x%x, phone: %d, proto: %s, method: ", hash
, phone
, proto_name);
ipc_m_print(IPC_GET_METHOD(*call));
printf(" args: (%u, %u, %u, %u, %u)\n", IPC_GET_ARG1(*call),
IPC_GET_ARG2(*call),
IPC_GET_ARG3(*call),
IPC_GET_ARG4(*call),
IPC_GET_ARG5(*call)
);
/* Store call in hash table for response matching */
pcall
= malloc(sizeof(pending_call_t
)); pcall->phone_hash = phone;
pcall->question = *call;
pcall->call_hash = hash;
hash_table_insert(&pending_calls, &pcall->call_hash, &pcall->link);
}
static void parse_answer(pending_call_t *pcall, ipc_call_t *answer)
{
int phone;
ipcarg_t method;
int retval;
static proto_t proto = { .name = "unknown" };
int cphone;
// printf("parse_answer\n");
phone = pcall->phone_hash;
method = IPC_GET_METHOD(pcall->question);
retval = IPC_GET_RETVAL(*answer);
printf("phone=%d, method=%d, retval=%d\n", phone, method, retval);
if (phone == 0 && method == IPC_M_CONNECT_ME_TO && retval == 0) {
/* Connected to a service (through NS) */
cphone = IPC_GET_ARG5(*answer);
printf("registering connection (phone %d)\n", cphone
); connection_set(cphone, 0, &proto);
} else {
printf("unrecognized connection\n"); }
}
void ipcp_call_in(ipc_call_t *call, ipc_callid_t hash)
{
link_t *item;
pending_call_t *pcall;
// printf("ipcp_call_in()\n");
/* printf("phone: %d, method: ", call->in_phone_hash);
ipc_m_print(IPC_GET_METHOD(*call));
printf(" args: (%u, %u, %u, %u, %u)\n",
IPC_GET_ARG1(*call),
IPC_GET_ARG2(*call),
IPC_GET_ARG3(*call),
IPC_GET_ARG4(*call),
IPC_GET_ARG5(*call)
);*/
if ((hash & IPC_CALLID_ANSWERED) == 0 && hash != IPCP_CALLID_SYNC) {
/* Not a response */
printf("Not a response (hash %d)\n", hash
); return;
}
hash = hash & ~IPC_CALLID_ANSWERED;
item = hash_table_find(&pending_calls, &hash);
if (item == NULL) return; // No matching question found
pcall = hash_table_get_instance(item, pending_call_t, link);
printf("response matched to question\n"); hash_table_remove(&pending_calls, &hash, 1);
parse_answer(pcall, call);
}
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);
}
void ipcp_hangup(int phone, int rc)
{
printf("hangup phone %d -> %d\n", phone
, rc
); connection_clear(phone);
}
/** @}
*/