tftpd: tweak HP PA-RISC firmware bug compatibility

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/networking/tftp.c b/networking/tftp.c
index 8e3b0a2dc..7c0ee58d7 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -117,8 +117,9 @@ struct globals {
         /* u16 TFTP_ERROR; u16 reason; both network-endian, then error text: */
         uint8_t error_pkt[4 + 32];
         struct passwd *pw;
-        /* used in tftpd_main(), a bit big for stack: */
-        char block_buf[TFTP_BLKSIZE_DEFAULT];
+        /* Used in tftpd_main() for initial packet */
+        /* Some HP PA-RISC firmware always sends fixed 516-byte requests */
+        char block_buf[516];
         char block_buf_tail[1];
 #if ENABLE_FEATURE_TFTP_PROGRESS_BAR
         off_t pos;
@@ -811,7 +812,7 @@ int tftpd_main(int argc UNUSED_PARAM, char **argv)
         ) {
                 goto err;
         }
-        /* Some HP PA-RISC firmware always sends fixed 512-byte requests,
+        /* Some HP PA-RISC firmware always sends fixed 516-byte requests,
          * with trailing garbage.
          * Support that by not requiring NUL to be the last byte (see above).
          * To make strXYZ() ops safe, force NUL termination: