245     static char features[1024];  in get_optional_features()  local
248     snprintf(features, sizeof(features), "Optional features available: ");  in get_optional_features()
252 	strncat(features, ", ",   in get_optional_features()
253 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
255     strncat(features, "CPU affinity setting",   in get_optional_features()
256 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
262 	strncat(features, ", ",   in get_optional_features()
263 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
265     strncat(features, "IPv6 flow label",   in get_optional_features()
266 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
272 	strncat(features, ", ",   in get_optional_features()
273 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
275     strncat(features, "SCTP",   in get_optional_features()
276 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
282 	strncat(features, ", ",   in get_optional_features()
283 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
285     strncat(features, "TCP congestion algorithm setting",   in get_optional_features()
286 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
292 	strncat(features, ", ",  in get_optional_features()
293 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
295     strncat(features, "sendfile / zerocopy",  in get_optional_features()
296 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
302 	strncat(features, ", ",  in get_optional_features()
303 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
305     strncat(features, "socket pacing",  in get_optional_features()
306 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
312 	strncat(features, ", ",  in get_optional_features()
313 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
315     strncat(features, "authentication",  in get_optional_features()
316 	sizeof(features) - strlen(features) - 1);  in get_optional_features()
321 	strncat(features, "None",   in get_optional_features()
322 		sizeof(features) - strlen(features) - 1);  in get_optional_features()
325     return features;  in get_optional_features()