- /* wait for multi-line response to end CONNECT response */
- do {
- mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
- if (strstr(mbuf, "200") != NULL
- && strstr(mbuf, "established") != NULL)
- foundit++;
- } while (mbuf_len > 3 && foundit == 0);
+ /*
+ * The first line is the HTTP response. According to RFC 7230,
+ * it's formated exactly like this:
+ *
+ * HTTP/d.d ddd Reason text\r\n
+ */
+ mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
+ if (mbuf[8] != ' ') {
+ BIO_printf(bio_err,
+ "%s: HTTP CONNECT failed, incorrect response "
+ "from proxy\n", prog);
+ foundit = error_proto;
+ } else if (mbuf[9] != '2') {
+ BIO_printf(bio_err, "%s: HTTP CONNECT failed: %s ", prog,
+ &mbuf[9]);
+ } else {
+ foundit = success;
+ }
+ if (foundit != error_proto) {
+ /* Read past all following headers */
+ do {
+ mbuf_len = BIO_gets(fbio, mbuf, BUFSIZZ);
+ } while (mbuf_len > 2);
+ }