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ip/tftpd: deal with block wrap arround

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This commit is contained in:
cinap_lenrek 2018-05-22 01:53:15 +02:00
parent 66eac7d687
commit d5c906f515
1 changed files with 2 additions and 2 deletions
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4
sys/src/cmd/ip/tftpd.c
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@ -542,9 +542,9 @@ awaitack(int fd, int block)
if (Debug) if (Debug)
syslog(dbg, flog, "tftpd %d read ack of %d bytes " syslog(dbg, flog, "tftpd %d read ack of %d bytes "
"for block %d", pid, al, ackblock); "for block %d", pid, al, ackblock);
if(ackblock == block) if(ackblock == (block & 0xffff))
return Ackok; /* for block just sent */ return Ackok; /* for block just sent */
else if(ackblock == block + 1) /* intel pxe eof bug */ else if(ackblock == (block + 1 & 0xffff)) /* intel pxe eof bug */
return Ackok; return Ackok;
else if(ackblock == 0xffff) else if(ackblock == 0xffff)
return Ackrexmit; return Ackrexmit;