cname_to_comp.c

聊天程序~使用LINUX c 语言实现~

/* cname_to_comp.c */

#include <cnaiapi.h>


computer cname_to_comp(char *cname) {
	computer		c;
	struct hostent		*hp;

	cnaiapi_init();

#if defined(FreeBSD) || defined(LINUX)
	pthread_mutex_lock(&cname_mutex);
#endif

	hp = gethostbyname(cname);
	if (hp == NULL) {
#if defined(FreeBSD) || defined(LINUX)
		pthread_mutex_unlock(&cname_mutex);
#endif
		return -1;
	}
	
	if (hp->h_addrtype != AF_INET ||
	    hp->h_length != sizeof(computer)) {
#if defined(FreeBSD) || defined(LINUX)
		pthread_mutex_unlock(&cname_mutex);
#endif
		return -1;
	}
	  
	c = *((long *) hp->h_addr);
#if defined(LINUX) || defined(SOLARIS)
	pthread_mutex_unlock(&cname_mutex);
#endif
	return c;
}