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/*
* Communication protocol
*
* $Id$
*/
#include "wl_proto.hh"
#include "wl_log.hh"
#include "wl_sock.hh"
/* Adds a field to the buffer */
int add_field(char *buffer, const char *string, int len)
{
char newlen[5];
/* 3 Byte = Length */
snprintf(newlen, sizeof(newlen) - 1, "%.3d", len);
memcpy(buffer, newlen, 3);
/* Length bytes = Value */
memcpy(buffer + 3, string, atoi(newlen));
/* Return length of attached field */
return (atoi(newlen) + 3);
}
int get_field(const char *buffer, char *out, int maxlen)
{
char len[5];
/* Get length of value */
memcpy(len, buffer, 3);
/* Copy buffer to out pointer */
memset(out, 0, maxlen);
if(atoi(len)-3 > maxlen -1)
memcpy(out, buffer + 3, maxlen - 1);
else
memcpy(out, buffer + 3, atoi(len));
/* Return length of whole field (including 3 byte length) */
return (atoi(len) + 3);
}
/* Send found network to UI */
int send_network_found (const char *guihost, int guiport, void *structure)
{
wl_network_t *ptr;
char buffer[2048], temp[5];
unsigned int len = 0;
ptr = (wl_network_t *)structure;
/* Type = Found new net (without length field) */
memset(temp, 0, sizeof(temp));
snprintf(temp, sizeof(temp), "%.2d", NETFOUND);
memcpy(buffer, temp, 2);
len += 2;
/* Set Net-type */
memset(temp, 0, sizeof(temp));
snprintf(temp, sizeof(temp), "%d", ptr->net_type);
len += add_field(buffer + len, temp, 1);
/* Set channel */
memset(temp, 0, sizeof(temp));
snprintf(temp, sizeof(temp), "%.2d", ptr->channel);
len += add_field(buffer + len, temp, 2);
/* Set WEP y/n */
memset(temp, 0, sizeof(temp));
snprintf(temp, sizeof(temp), "%d", ptr->wep);
len += add_field(buffer + len, temp, 1);
/* Set Mac */
len += add_field(buffer + len, ptr->mac, 17);
/* Set ssid */
if(len + ptr->ssid_len < sizeof(buffer) - 1)
len += add_field(buffer + len, ptr->bssid, ptr->ssid_len);
else
len += add_field(buffer + len, ptr->bssid, sizeof(buffer) - len - 1);
/* Send prepared buffer to UI */
#ifdef DEBUG
wl_loginfo("Sending network to UI: '%s'", buffer);
#endif
return ((!wl_send(guihost, guiport, buffer)) ? 0 : 1);
}
/* Fill buffer into structur */
int get_network_found (void *structure, const char *buffer)
{
wl_network_t *ptr;
char temp[5];
unsigned int len = 0;
ptr = (wl_network_t *)structure;
/* packet type already determined, skip check */
len += 2;
/* Get net type (accesspoint || ad-hoc || ...) */
memset(temp, 0, sizeof(temp));
len += get_field(buffer + len, temp, sizeof(temp));
ptr->net_type = atoi(temp);
/* Get channel */
memset(temp, 0, sizeof(temp));
len += get_field(buffer + len, temp, sizeof(temp));
ptr->channel = atoi(temp);
/* Set WEP y/n */
memset(temp, 0, sizeof(temp));
len += get_field(buffer + len, temp, sizeof(temp));
ptr->wep = atoi(temp);
/* Set MAC address */
len += get_field(buffer + len, ptr->mac, sizeof(ptr->mac));
/* Set BSSID */
len += get_field(buffer + len, ptr->bssid, sizeof(ptr->bssid));
return 1;
}
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