1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* Copyright (C) 2019 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include "bounce.h"
static char *nick;
// TODO: Channels.
static struct {
char *origin;
char *welcome;
char *yourHost;
char *created;
char *myInfo[4];
} intro;
enum { ISupportCap = 32 };
static struct {
char *values[ISupportCap];
size_t len;
} iSupport;
static void set(char **field, const char *value) {
if (*field) free(*field);
*field = strdup(value);
if (!*field) err(EX_OSERR, "strdup");
}
static void iSupportSet(const char *value) {
if (iSupport.len == ISupportCap) {
warnx("truncating ISUPPORT value %s", value);
return;
}
set(&iSupport.values[iSupport.len++], value);
}
bool stateReady(void) {
return nick
&& intro.origin
&& intro.welcome
&& intro.yourHost
&& intro.created
&& intro.myInfo[0]
&& iSupport.len;
}
enum { ParamCap = 15 };
struct Command {
const char *origin;
const char *name;
const char *params[ParamCap];
};
typedef void Handler(struct Command);
static void handleCap(struct Command cmd) {
bool ack = cmd.params[1] && !strcmp(cmd.params[1], "ACK");
bool sasl = cmd.params[2] && !strcmp(cmd.params[2], "sasl");
if (!ack || !sasl) errx(EX_CONFIG, "server does not support SASL");
serverAuth();
}
static void handleReplyWelcome(struct Command cmd) {
if (!cmd.params[1]) errx(EX_PROTOCOL, "RPL_WELCOME without message");
set(&intro.origin, cmd.origin);
set(&nick, cmd.params[0]);
set(&intro.welcome, cmd.params[1]);
}
static void handleReplyYourHost(struct Command cmd) {
if (!cmd.params[1]) errx(EX_PROTOCOL, "RPL_YOURHOST without message");
set(&intro.yourHost, cmd.params[1]);
}
static void handleReplyCreated(struct Command cmd) {
if (!cmd.params[1]) errx(EX_PROTOCOL, "RPL_CREATED without message");
set(&intro.created, cmd.params[1]);
}
static void handleReplyMyInfo(struct Command cmd) {
if (!cmd.params[4]) errx(EX_PROTOCOL, "RPL_MYINFO without 4 parameters");
set(&intro.myInfo[0], cmd.params[1]);
set(&intro.myInfo[1], cmd.params[2]);
set(&intro.myInfo[2], cmd.params[3]);
set(&intro.myInfo[3], cmd.params[4]);
}
static void handleReplyISupport(struct Command cmd) {
for (size_t i = 1; i < ParamCap; ++i) {
if (!cmd.params[i] || strchr(cmd.params[i], ' ')) break;
iSupportSet(cmd.params[i]);
}
}
static void handleError(struct Command cmd) {
errx(EX_UNAVAILABLE, "%s", cmd.params[0]);
}
static const struct {
const char *cmd;
Handler *fn;
} Handlers[] = {
{ "001", handleReplyWelcome },
{ "002", handleReplyYourHost },
{ "003", handleReplyCreated },
{ "004", handleReplyMyInfo },
{ "005", handleReplyISupport },
{ "CAP", handleCap },
{ "ERROR", handleError },
};
static const size_t HandlersLen = sizeof(Handlers) / sizeof(Handlers[0]);
void stateParse(char *line) {
struct Command cmd = {0};
if (line[0] == ':') {
cmd.origin = 1 + strsep(&line, " ");
if (!line) errx(EX_PROTOCOL, "eof after origin");
}
cmd.name = strsep(&line, " ");
for (size_t i = 0; line && i < ParamCap; ++i) {
if (line[0] == ':') {
cmd.params[i] = line;
break;
}
cmd.params[i] = strsep(&line, " ");
}
for (size_t i = 0; i < HandlersLen; ++i) {
if (strcmp(cmd.name, Handlers[i].cmd)) continue;
Handlers[i].fn(cmd);
break;
}
}
|