#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<net/if.h>
static char *bad_interface_names[] = {
"lo:",
"lo",
"stf", /* pseudo-device 6to4 tunnel interface */
"gif", /* psuedo-device generic tunnel interface */
"dummy",
"vmnet",
NULL /* last entry must be NULL */
};
static int is_bad_interface_name(char *i) {
char **p;
for (p = bad_interface_names; *p; ++p)
if (strncmp(i, *p, strlen(*p)) == 0)
return 1;
return 0;
}
/* This finds the first interface which is up and is not the loopback
* interface or one of the interface types listed in bad_interface_names. */
static char *get_first_interface(void) {
struct if_nameindex * nameindex;
char *i = NULL;
int j = 0;
/* Use if_nameindex(3) instead? */
nameindex = if_nameindex();
if(nameindex == NULL) {
return NULL;
}
while(nameindex[j].if_index != 0) {
if (strcmp(nameindex[j].if_name, "lo") != 0 && !is_bad_interface_name(nameindex[j
1. HCI层协议概述：
HCI提供一套统一的方法来访问Bluetooth底层。如图所示：
从图上可以看出，Host Controller Interface(HCI) 就是用来沟通Host和Module。Host通常就是PC， Module则是以各种物理连接形式（USB,serial,pc-card等）连接到PC上的bluetooth Dongle。
在Host这一端：application,SDP,L2cap等协议 ......
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
int sock_fd;
struct my_addr;
struct ifreq ifr;
unsigned char * addr;
#define ETH_INTERFACE_NAME "e ......
