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improve zlib error reporting

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zlib is not exactly thorough about always populating z_stream->msg, so
fall back to the error code if necessary.
This commit is contained in:
Oswald Buddenhagen 2017-07-30 13:47:51 +02:00
parent 56515abe94
commit 366ed7d762
1 changed files with 17 additions and 7 deletions
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24
src/socket.c
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@ -292,6 +292,14 @@ static void start_tls_p3( conn_t *conn, int ok )
static void z_fake_cb( void * );
static const char *
z_err_msg( int code, z_streamp strm )
{
/* zlib's consistency in populating z_stream->msg is somewhat
* less than stellar. zError() is undocumented. */
return strm->msg ? strm->msg : zError( code );
}
void
socket_start_deflate( conn_t *conn )
{
@ -303,7 +311,7 @@ socket_start_deflate( conn_t *conn )
-15 /* Use raw deflate */
);
if (result != Z_OK) {
error( "Fatal: Cannot initialize decompression: %s\n", conn->in_z->msg );
error( "Fatal: Cannot initialize decompression: %s\n", z_err_msg( result, conn->in_z ) );
abort();
}
@ -317,7 +325,7 @@ socket_start_deflate( conn_t *conn )
Z_DEFAULT_STRATEGY /* Don't try to do anything fancy */
);
if (result != Z_OK) {
error( "Fatal: Cannot initialize compression: %s\n", conn->out_z->msg );
error( "Fatal: Cannot initialize compression: %s\n", z_err_msg( result, conn->out_z ) );
abort();
}
@ -630,7 +638,7 @@ socket_fill_z( conn_t *sock )
ret = inflate( sock->in_z, Z_SYNC_FLUSH );
if (ret != Z_OK && ret != Z_STREAM_END) {
error( "Error decompressing data from %s: %s\n", sock->name, sock->in_z->msg );
error( "Error decompressing data from %s: %s\n", sock->name, z_err_msg( ret, sock->in_z ) );
socket_fail( sock );
return;
}
@ -806,6 +814,7 @@ do_flush( conn_t *conn )
if (!conn->z_written)
return;
do {
int ret;
if (!bc) {
buf_avail = WRITE_CHUNK_SIZE;
bc = nfmalloc( offsetof(buff_chunk_t, data) + buf_avail );
@ -815,8 +824,8 @@ do_flush( conn_t *conn )
conn->out_z->avail_in = 0;
conn->out_z->next_out = (uchar *)bc->data + bc->len;
conn->out_z->avail_out = buf_avail;
if (deflate( conn->out_z, Z_PARTIAL_FLUSH ) != Z_OK) {
error( "Fatal: Compression error: %s\n", conn->out_z->msg );
if ((ret = deflate( conn->out_z, Z_PARTIAL_FLUSH )) != Z_OK) {
error( "Fatal: Compression error: %s\n", z_err_msg( ret, conn->out_z ) );
abort();
}
bc->len = (char *)conn->out_z->next_out - bc->data;
@ -878,12 +887,13 @@ socket_write( conn_t *conn, conn_iovec_t *iov, int iovcnt )
len = iov->len - offset;
#ifdef HAVE_LIBZ
if (conn->out_z) {
int ret;
conn->out_z->next_in = (uchar *)iov->buf + offset;
conn->out_z->avail_in = len;
conn->out_z->next_out = (uchar *)bc->data + bc->len;
conn->out_z->avail_out = buf_avail;
if (deflate( conn->out_z, Z_NO_FLUSH ) != Z_OK) {
error( "Fatal: Compression error: %s\n", conn->out_z->msg );
if ((ret = deflate( conn->out_z, Z_NO_FLUSH )) != Z_OK) {
error( "Fatal: Compression error: %s\n", z_err_msg( ret, conn->out_z ) );
abort();
}
bc->len = (char *)conn->out_z->next_out - bc->data;