void friend_got_message(struct friend *friend, char *buffer, size_t len)
{
if (len >= 4 && !strncmp(buffer, "PING", 4)) {
+ friend->state = STATE_ONLINE;
pong(friend);
} else if (len >= 4 && !strncmp(buffer, "PONG", 4)) {
friend->state = STATE_ONLINE;