Author: asomers Date: Wed Aug 22 23:31:27 2018 New Revision: 338216 URL: https://svnweb.freebsd.org/changeset/base/338216
Log: tftpd: Fix data corruption bug with netascii Transferring files in netascii format requires, among other things, translating all CR characters to a CR,NUL pair. tftpd does this correctly except when the CR occurs as the last octet of a packet. In that case, it erroneously drops the NUL which should be part of the following packet. The bug was caused by using 0 as a sentinel value in a variable that could legitimately hold 0. Fix it by switching the sentinel value to -1. PR: 178055 Reported by: Richard <rsi...@gmail.com> Reviewed by: cem MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D16853 Modified: head/libexec/tftpd/tftp-file.c Modified: head/libexec/tftpd/tftp-file.c ============================================================================== --- head/libexec/tftpd/tftp-file.c Wed Aug 22 22:56:01 2018 (r338215) +++ head/libexec/tftpd/tftp-file.c Wed Aug 22 23:31:27 2018 (r338216) @@ -110,10 +110,10 @@ convert_to_net(char *buffer, size_t count, int init) { size_t i; static size_t n = 0, in = 0; - static int newline = 0; + static int newline = -1; if (init) { - newline = 0; + newline = -1; n = 0; in = 0; return 0 ; @@ -124,9 +124,9 @@ convert_to_net(char *buffer, size_t count, int init) */ i = 0; - if (newline) { + if (newline != -1) { buffer[i++] = newline; - newline = 0; + newline = -1; } while (i < count) { @@ -161,7 +161,7 @@ convert_to_net(char *buffer, size_t count, int init) if (i > count) { /* - * Whoops... that isn't alllowed (but it will happen + * Whoops... that isn't allowed (but it will happen * when there is a CR or LF at the end of the buffer) */ newline = buffer[i-1]; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
