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comparison sip-manual-out/readconf.c @ 71:d74b545a3c2a

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sip-manual-out: new test program
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 20 Sep 2022 10:14:18 -0800
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70:47976db01894 71:d74b545a3c2a
1 /*
2 * In this module we implement the reading of destination configuration
3 * for sip-manual-out.
4 */
5
6 #include <sys/types.h>
7 #include <sys/socket.h>
8 #include <netinet/in.h>
9 #include <arpa/inet.h>
10 #include <ctype.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <strings.h>
15
16 struct in_addr sip_bind_ip, sip_dest_ip;
17 unsigned sip_bind_port, sip_dest_port = 5060;
18 char sip_dest_domain[64];
19
20 struct parse_state {
21 char *filename;
22 int lineno;
23 int set_mask;
24 };
25
26 static void
27 handle_ip(st, kw, var, arg)
28 struct parse_state *st;
29 char *kw, *arg;
30 struct in_addr *var;
31 {
32 var->s_addr = inet_addr(arg);
33 if (var->s_addr == INADDR_NONE) {
34 fprintf(stderr,
35 "%s line %d: invalid IP address argument \"%s\"\n",
36 st->filename, st->lineno, arg);
37 exit(1);
38 }
39 }
40
41 static void
42 handle_num(st, kw, var, arg)
43 struct parse_state *st;
44 char *kw, *arg;
45 unsigned *var;
46 {
47 char *endp;
48
49 *var = strtoul(arg, &endp, 10);
50 if (*endp) {
51 fprintf(stderr, "%s line %d: invalid numeric argument \"%s\"\n",
52 st->filename, st->lineno, arg);
53 exit(1);
54 }
55 }
56
57 static void
58 handle_str(st, kw, var, arg)
59 struct parse_state *st;
60 char *kw, *arg, *var;
61 {
62 strcpy(var, arg);
63 }
64
65 static void
66 process_line(st, line)
67 struct parse_state *st;
68 char *line;
69 {
70 char *cp, *np, *arg;
71 void (*handler)(), *var;
72 int set_id;
73
74 if (!index(line, '\n')) {
75 fprintf(stderr, "%s line %d: too long or missing newline\n",
76 st->filename, st->lineno);
77 exit(1);
78 }
79 for (cp = line; isspace(*cp); cp++)
80 ;
81 if (*cp == '\0' || *cp == '#')
82 return;
83 for (np = cp; *cp && !isspace(*cp); cp++)
84 ;
85 if (*cp)
86 *cp++ = '\0';
87 if (!strcmp(np, "bind-ip")) {
88 handler = handle_ip;
89 var = &sip_bind_ip;
90 set_id = 1;
91 } else if (!strcmp(np, "bind-port")) {
92 handler = handle_num;
93 var = &sip_bind_port;
94 set_id = 2;
95 } else if (!strcmp(np, "dest-ip")) {
96 handler = handle_ip;
97 var = &sip_dest_ip;
98 set_id = 4;
99 } else if (!strcmp(np, "dest-port")) {
100 handler = handle_num;
101 var = &sip_dest_port;
102 set_id = 0;
103 } else if (!strcmp(np, "dest-domain")) {
104 handler = handle_str;
105 var = sip_dest_domain;
106 set_id = 8;
107 } else {
108 fprintf(stderr, "%s line %d: non-understood keyword \"%s\"\n",
109 st->filename, st->lineno, np);
110 exit(1);
111 }
112 if (st->set_mask & set_id) {
113 fprintf(stderr, "%s line %d: duplicate %s setting\n",
114 st->filename, st->lineno, np);
115 exit(1);
116 }
117 while (isspace(*cp))
118 cp++;
119 if (*cp == '\0' || *cp == '#') {
120 inv_syntax: fprintf(stderr,
121 "%s line %d: %s setting requires one argument\n",
122 st->filename, st->lineno, np);
123 exit(1);
124 }
125 for (arg = cp; *cp && !isspace(*cp); cp++)
126 ;
127 if (*cp)
128 *cp++ = '\0';
129 while (isspace(*cp))
130 cp++;
131 if (*cp != '\0' && *cp != '#')
132 goto inv_syntax;
133 handler(st, np, var, arg);
134 st->set_mask |= set_id;
135 }
136
137 read_config_file(filename)
138 char *filename;
139 {
140 FILE *inf;
141 struct parse_state pst;
142 char linebuf[256];
143
144 inf = fopen(filename, "r");
145 if (!inf) {
146 perror(filename);
147 exit(1);
148 }
149 pst.set_mask = 0;
150 pst.filename = filename;
151 for (pst.lineno = 1; fgets(linebuf, sizeof linebuf, inf); pst.lineno++)
152 process_line(&pst, linebuf);
153 fclose(inf);
154 if (pst.set_mask != 15) {
155 fprintf(stderr, "error: %s did not set all required settings\n",
156 filename);
157 exit(1);
158 }
159 }