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#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#define _GNU_SOURCE
#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)
{
char *sep;
*action = 0;
*device = NULL;
/* 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';
len -= sep - buf + 1;
if (streq(buf, "add"))
*action = EVENT_ACTION_ADD;
else if (streq(buf, "remove"))
*action = EVENT_ACTION_REMOVE;
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 0;
}
/**
* 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;
}
/* find the separator */
sep = memchr(buf, '=', param_len);
if (!sep)
continue;
name_len = sep - buf;
value_len = param_len - name_len - 1;
/* update the params array */
event->params = talloc_realloc(event, event->params,
struct param, ++event->n_params);
param = &event->params[event->n_params - 1];
param->name = talloc_strndup(event, buf, name_len);
param->value = talloc_strndup(event, sep + 1, value_len);
}
}
int event_parse_ad_message(struct event *event, char *buf, int len)
{
int result;
char *device;
enum event_action action;
int device_len;
result = event_parse_ad_header(buf, len, &action, &device);
if (result)
return -1;
device_len = strlen(device);
/* now we have an action and a device, we can construct the event */
event->action = action;
event->device = talloc_strndup(event, device, device_len);
event->n_params = 0;
event->params = NULL;
len -= device_len + 1;
event_parse_params(event, device + device_len + 1, 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;
}
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