4   * it provides methods to map a transport address to a printable host name
7   * The result from the hostname lookup method is STRING_PARANOID when a host
8   * pretends to have someone elses name, or when a host name is available but
50   * Speed up DNS lookups by terminating the host name with a dot. Should be
93      * Look up the client host address. Hal R. Brand <BRAND@addvax.llnl.gov>  in sock_host()
94      * suggested how to get the client host info in case of UDP connections:  in sock_host()
140 void    sock_hostaddr(struct host_info *host)  in sock_hostaddr()  argument
143     struct sockaddr *sin = host->sin;  in sock_hostaddr()
154     getnameinfo(sin, salen, host->addr, sizeof(host->addr),  in sock_hostaddr()
157     struct sockaddr_in *sin = host->sin;  in sock_hostaddr()
160 	STRN_CPY(host->addr, inet_ntoa(sin->sin_addr), sizeof(host->addr));  in sock_hostaddr()
164 /* sock_hostname - map endpoint address to host name */
166 void    sock_hostname(struct host_info *host)  in sock_hostname()  argument
169     struct sockaddr *sin = host->sin;  in sock_hostname()
210 	STRN_CPY(host->name, hname, sizeof(host->name));  in sock_hostname()
217 	if ((err = getaddrinfo(host->name, NULL, &hints, &res0)) == 0) {  in sock_hostname()
219 	    tcpd_warn("host name/name mismatch: "  in sock_hostname()
221 		      host->name);  in sock_hostname()
222 	    strcpy(host->name, paranoid);	/* name is bad, clobber it */  in sock_hostname()
246 	if (getaddrinfo(host->name, NULL, &hints, &res0) != 0) {  in sock_hostname()
249 	     * Unable to verify that the host name matches the address. This  in sock_hostname()
254 		      host->name,  in sock_hostname()
258 		    || STR_NE(host->name, res0->ai_canonname))  in sock_hostname()
259 		   && STR_NE(host->name, "localhost")) {  in sock_hostname()
267 	    tcpd_warn("host name/name mismatch: %s != %.*s",  in sock_hostname()
268 		      host->name, STRING_LENGTH,  in sock_hostname()
305 	     * The host name does not map to the initial address. Perhaps  in sock_hostname()
312 	    tcpd_warn("host name/address mismatch: %s != %.*s",  in sock_hostname()
316 	strcpy(host->name, paranoid);		/* name is bad, clobber it */  in sock_hostname()
321     struct sockaddr_in *sin = host->sin;  in sock_hostname()
330      * host name/address checking code below.  in sock_hostname()
336 	STRN_CPY(host->name, hp->h_name, sizeof(host->name));  in sock_hostname()
351 	if ((hp = gethostbyname(host->name)) == 0) {  in sock_hostname()
354 	     * Unable to verify that the host name matches the address. This  in sock_hostname()
359 		      host->name);  in sock_hostname()
361 	} else if (STR_NE(host->name, hp->h_name)  in sock_hostname()
362 		   && STR_NE(host->name, "localhost")) {  in sock_hostname()
370 	    tcpd_warn("host name/name mismatch: %s != %.*s",  in sock_hostname()
371 		      host->name, STRING_LENGTH, hp->h_name);  in sock_hostname()
390 	     * The host name does not map to the initial address. Perhaps  in sock_hostname()
395 	    tcpd_warn("host name/address mismatch: %s != %.*s",  in sock_hostname()
398 	strcpy(host->name, paranoid);		/* name is bad, clobber it */  in sock_hostname()