+static size_t apache_header_callback (void *buf, size_t size, size_t nmemb,
+ void *user_data)
+{
+ size_t len = size * nmemb;
+ apache_t *st;
+
+ st = user_data;
+ if (st == NULL)
+ {
+ ERROR ("apache plugin: apache_header_callback: "
+ "user_data pointer is NULL.");
+ return (0);
+ }
+
+ if (len <= 0)
+ return (len);
+
+ /* look for the Server header */
+ if (strncasecmp (buf, "Server: ", strlen ("Server: ")) != 0)
+ return (len);
+
+ if (strstr (buf, "Apache") != NULL)
+ st->server_type = APACHE;
+ else if (strstr (buf, "lighttpd") != NULL)
+ st->server_type = LIGHTTPD;
+ else if (strstr (buf, "IBM_HTTP_Server") != NULL)
+ st->server_type = APACHE;
+ else
+ {
+ const char *hdr = buf;
+
+ hdr += strlen ("Server: ");
+ NOTICE ("apache plugin: Unknown server software: %s", hdr);
+ }
+
+ return (len);
+} /* apache_header_callback */
+