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| author | Guy Harris <guy@alum.mit.edu> | 2016-09-28 16:45:23 -0700 |
|---|---|---|
| committer | Guy Harris <guy@alum.mit.edu> | 2016-09-28 23:45:58 +0000 |
| commit | 48a66835ee4f319ba7806a542bb2cf1f16a2ac06 (patch) | |
| tree | f4b86d49b651fc55047f16d98b1c2401238e03ec /wiretap/wtap.c | |
| parent | a3ce2336b2a0e684a94d1e0046556bc0b42748f2 (diff) | |
| download | wireshark-48a66835ee4f319ba7806a542bb2cf1f16a2ac06.tar.gz | |
Use wtap_read_bytes() to skip over bytes when reading a record.
Allow file_read() to take a null pointer as a buffer argument; a null
argument means "do everything except copy the bytes from the file to the
user buffer". That means that wtap_read_bytes() and
wtap_read_bytes_or_eof() also support a null pointer as a buffer
argument.
Use wtap_read_bytes() with a null buffer argument rather than
file_skip() to skip forward over data.
This fixes some places where files were mis-identified as ERF files, as
the ERF open heuristics now get a short "read" error if they try to skip
over more bytes than exist in the file.
Change-Id: I4f73499d877c1f582e2bcf9b045034880cb09622
Reviewed-on: https://code.wireshark.org/review/17974
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Diffstat (limited to 'wiretap/wtap.c')
| -rw-r--r-- | wiretap/wtap.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/wiretap/wtap.c b/wiretap/wtap.c index 01dfee42d3..ef9d709604 100644 --- a/wiretap/wtap.c +++ b/wiretap/wtap.c @@ -1268,7 +1268,8 @@ wtap_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset) } /* - * Read a given number of bytes from a file. + * Read a given number of bytes from a file into a buffer or, if + * buf is NULL, just discard them. * * If we succeed, return TRUE. * @@ -1299,7 +1300,8 @@ wtap_read_bytes_or_eof(FILE_T fh, void *buf, unsigned int count, int *err, } /* - * Read a given number of bytes from a file. + * Read a given number of bytes from a file into a buffer or, if + * buf is NULL, just discard them. * * If we succeed, return TRUE. * |