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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <string.h>
#include <log/log.h>
#include <talloc/talloc.h>
#include "event.h"
#define streq(a, b) (!strcasecmp((a), (b)))
/**
* event_parse_ad_header - Parse an <action>@<device> event header.
*
* The buffer is modified in place.
* Returns zero on success.
*/
static int event_parse_ad_header(char *buf, int len, enum event_action *action,
char **device)
{
int headerlen;
char *sep;
*action = 0;
*device = NULL;
headerlen = strnlen(buf, len);
if (!headerlen) {
pb_log("%s: bad header, no data\n", __func__);
return -1;
}
/* we should see an <action>@<device>\0 at the head of the buffer */
sep = strchr(buf, '@');
if (!sep) {
pb_log("%s: bad header: %s\n", __func__, buf);
return -1;
}
/* terminate the action string */
*sep = '\0';
if (streq(buf, "add"))
*action = EVENT_ACTION_ADD;
else if (streq(buf, "remove"))
*action = EVENT_ACTION_REMOVE;
else if (streq(buf, "url"))
*action = EVENT_ACTION_URL;
else if (streq(buf, "conf"))
*action = EVENT_ACTION_CONF;
else if (streq(buf, "dhcp"))
*action = EVENT_ACTION_DHCP;
else if (streq(buf, "boot"))
*action = EVENT_ACTION_BOOT;
else {
pb_log("%s: unknown action: %s\n", __func__, buf);
return -1;
}
if (!*(sep + 1)) {
pb_log("%s: bad device: %s\n", __func__, buf);
return -1;
}
*device = sep + 1;
return headerlen;
}
/**
* event_parse_params - Parse a <name>=<value> buffer.
*
* The buffer is not modified.
*/
static void event_parse_params(struct event *event, const char *buf, int len)
{
int param_len, name_len, value_len;
struct param *param;
char *sep;
for (; len > 0; len -= param_len + 1, buf += param_len + 1) {
/* find the length of the whole parameter */
param_len = strnlen(buf, len);
if (!param_len) {
/* multiple NULs? skip over */
param_len = 1;
continue;
}
/* update the params array */
event->params = talloc_realloc(event, event->params,
struct param, ++event->n_params);
param = &event->params[event->n_params - 1];
sep = memchr(buf, '=', param_len);
if (!sep) {
name_len = param_len;
value_len = 0;
param->value = "";
} else {
name_len = sep - buf;
value_len = param_len - name_len - 1;
param->value = talloc_strndup(event, sep + 1,
value_len);
}
param->name = talloc_strndup(event, buf, name_len);
}
}
int event_parse_ad_message(struct event *event, char *buf, int len)
{
enum event_action action;
int headerlen;
char *device;
headerlen = event_parse_ad_header(buf, len, &action, &device);
if (headerlen <= 0)
return -1;
/* now we have an action and a device, we can construct the event */
event->action = action;
event->device = talloc_strdup(event, device);
event->n_params = 0;
event->params = NULL;
len -= headerlen + 1;
buf += headerlen + 1;
event_parse_params(event, buf, len);
return 0;
}
const char *event_get_param(const struct event *event, const char *name)
{
int i;
for (i = 0; i < event->n_params; i++)
if (!strcasecmp(event->params[i].name, name))
return event->params[i].value;
return NULL;
}
void event_set_param(struct event *event, const char *name, const char *value)
{
struct param *param;
int i;
/* if it's already present, replace the value of the old param */
for (i = 0; i < event->n_params; i++) {
param = &event->params[i];
if (!strcasecmp(param->name, name)) {
talloc_free(param->value);
param->value = talloc_strdup(event, value);
return;
}
}
/* not found - create a new param */
event->params = talloc_realloc(event, event->params,
struct param, ++event->n_params);
param = &event->params[event->n_params - 1];
param->name = talloc_strdup(event, name);
param->value = talloc_strdup(event, value);
}
|
