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comparison mncc/gsm_call.c @ 15:ccc5ab6d8388

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first version of themwi-mncc for ThemWi2
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 26 Jun 2022 16:31:47 -0800
parents
children 660126bd5f59
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14:aea422af79dd 15:ccc5ab6d8388
1 /*
2 * In this module we implement allocation, freeing and retrieval
3 * of gsm_call structures.
4 */
5
6 #include <sys/types.h>
7 #include <stdio.h>
8 #include <stdint.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include <strings.h>
12 #include <syslog.h>
13 #include "struct.h"
14 #include "gsm_call.h"
15
16 struct gsm_call *call_list_head;
17
18 static uint32_t mt_callref;
19
20 struct gsm_call *
21 find_gsm_callref(callref)
22 uint32_t callref;
23 {
24 struct gsm_call *call;
25
26 for (call = call_list_head; call; call = call->next) {
27 if (call->gc_flag)
28 continue;
29 if (call->callref == callref)
30 return call;
31 }
32 return 0;
33 }
34
35 struct gsm_call *
36 find_socket_call(conn, ref)
37 struct socket_conn *conn;
38 uint32_t ref;
39 {
40 struct gsm_call *call;
41
42 for (call = call_list_head; call; call = call->next) {
43 if (call->gc_flag)
44 continue;
45 if (call->socket == conn && call->socket_ref == ref)
46 return call;
47 }
48 return 0;
49 }
50
51 struct gsm_call *
52 create_gsm_call(callref)
53 uint32_t callref;
54 {
55 struct gsm_call *call;
56
57 call = malloc(sizeof(struct gsm_call));
58 if (call) {
59 bzero(call, sizeof(struct gsm_call));
60 call->callref = callref;
61 call->next = call_list_head;
62 call_list_head = call;
63 }
64 return call;
65 }
66
67 uint32_t
68 alloc_mt_callref()
69 {
70 mt_callref++;
71 if (mt_callref > 0x7FFFFFFF)
72 mt_callref = 1;
73 return mt_callref;
74 }
75
76 struct gsm_call *
77 create_new_mt_call()
78 {
79 uint32_t callref;
80
81 for (;;) {
82 callref = alloc_mt_callref();
83 if (!find_gsm_callref(callref))
84 break;
85 }
86 return create_gsm_call(callref);
87 }
88
89 gc_call_list()
90 {
91 struct gsm_call *call, **cp;
92
93 for (cp = &call_list_head; call = *cp; ) {
94 if (call->gc_flag) {
95 *cp = call->next;
96 free(call);
97 continue;
98 }
99 cp = &call->next;
100 }
101 }