Imported Upstream version 7.53.1

[platform/upstream/curl.git] / lib / content_encoding.c

diff --git a/lib/content_encoding.c b/lib/content_encoding.c
index 6fb7c8d..c3996a1 100644 (file)
--- a/lib/content_encoding.c
+++ b/lib/content_encoding.c
@@ -5,11 +5,11 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
- * are also available at http://curl.haxx.se/docs/copyright.html.
+ * are also available at https://curl.haxx.se/docs/copyright.html.
  *
  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  * copies of the Software, and permit persons to whom the Software is
@@ -20,19 +20,16 @@
  *
  ***************************************************************************/
 
-#include "setup.h"
+#include "curl_setup.h"
 
 #ifdef HAVE_LIBZ
 
-#include <stdlib.h>
-#include <string.h>
-
 #include "urldata.h"
 #include <curl/curl.h>
 #include "sendf.h"
 #include "content_encoding.h"
+#include "strdup.h"
 #include "curl_memory.h"
-
 #include "memdebug.h"
 
 /* Comment this out if zlib is always going to be at least ver. 1.2.0.4
@@ -52,16 +49,31 @@
 #define COMMENT      0x10 /* bit 4 set: file comment present */
 #define RESERVED     0xE0 /* bits 5..7: reserved */
 
+static voidpf
+zalloc_cb(voidpf opaque, unsigned int items, unsigned int size)
+{
+  (void) opaque;
+  /* not a typo, keep it calloc() */
+  return (voidpf) calloc(items, size);
+}
+
+static void
+zfree_cb(voidpf opaque, voidpf ptr)
+{
+  (void) opaque;
+  free(ptr);
+}
+
 static CURLcode
 process_zlib_error(struct connectdata *conn, z_stream *z)
 {
-  struct SessionHandle *data = conn->data;
+  struct Curl_easy *data = conn->data;
   if(z->msg)
-    failf (data, "Error while processing content unencoding: %s",
-           z->msg);
+    failf(data, "Error while processing content unencoding: %s",
+          z->msg);
   else
-    failf (data, "Error while processing content unencoding: "
-           "Unknown failure within decompression software.");
+    failf(data, "Error while processing content unencoding: "
+          "Unknown failure within decompression software.");
 
   return CURLE_BAD_CONTENT_ENCODING;
 }
@@ -95,7 +107,7 @@ inflate_stream(struct connectdata *conn,
 
   /* because the buffer size is fixed, iteratively decompress and transfer to
      the client via client_write. */
-  for (;;) {
+  for(;;) {
     /* (re)set buffer for decompressed output for every iteration */
     z->next_out = (Bytef *)decomp;
     z->avail_out = DSIZ;
@@ -161,11 +173,10 @@ Curl_unencode_deflate_write(struct connectdata *conn,
 
   /* Initialize zlib? */
   if(k->zlib_init == ZLIB_UNINIT) {
-    z->zalloc = (alloc_func)Z_NULL;
-    z->zfree = (free_func)Z_NULL;
-    z->opaque = 0;
-    z->next_in = NULL;
-    z->avail_in = 0;
+    memset(z, 0, sizeof(z_stream));
+    z->zalloc = (alloc_func)zalloc_cb;
+    z->zfree = (free_func)zfree_cb;
+
     if(inflateInit(z) != Z_OK)
       return process_zlib_error(conn, z);
     k->zlib_init = ZLIB_INIT;
@@ -272,11 +283,9 @@ Curl_unencode_gzip_write(struct connectdata *conn,
 
   /* Initialize zlib? */
   if(k->zlib_init == ZLIB_UNINIT) {
-    z->zalloc = (alloc_func)Z_NULL;
-    z->zfree = (free_func)Z_NULL;
-    z->opaque = 0;
-    z->next_in = NULL;
-    z->avail_in = 0;
+    memset(z, 0, sizeof(z_stream));
+    z->zalloc = (alloc_func)zalloc_cb;
+    z->zfree = (free_func)zfree_cb;
 
     if(strcmp(zlibVersion(), "1.2.0.4") >= 0) {
       /* zlib ver. >= 1.2.0.4 supports transparent gzip decompressing */
@@ -305,7 +314,7 @@ Curl_unencode_gzip_write(struct connectdata *conn,
 #ifndef OLD_ZLIB_SUPPORT
   /* Support for old zlib versions is compiled away and we are running with
      an old version, so return an error. */
-  return exit_zlib(z, &k->zlib_init, CURLE_FUNCTION_NOT_FOUND);
+  return exit_zlib(z, &k->zlib_init, CURLE_WRITE_ERROR);
 
 #else
   /* This next mess is to get around the potential case where there isn't
@@ -318,14 +327,14 @@ Curl_unencode_gzip_write(struct connectdata *conn,
    * can handle the gzip header themselves.
    */
 
-  switch (k->zlib_init) {
+  switch(k->zlib_init) {
   /* Skip over gzip header? */
   case ZLIB_INIT:
   {
     /* Initial call state */
     ssize_t hlen;
 
-    switch (check_gzip_header((unsigned char *)k->str, nread, &hlen)) {
+    switch(check_gzip_header((unsigned char *)k->str, nread, &hlen)) {
     case GZIP_OK:
       z->next_in = (Bytef *)k->str + hlen;
       z->avail_in = (uInt)(nread - hlen);
@@ -362,18 +371,15 @@ Curl_unencode_gzip_write(struct connectdata *conn,
   {
     /* Need more gzip header data state */
     ssize_t hlen;
-    unsigned char *oldblock = z->next_in;
-
     z->avail_in += (uInt)nread;
-    z->next_in = realloc(z->next_in, z->avail_in);
+    z->next_in = Curl_saferealloc(z->next_in, z->avail_in);
     if(z->next_in == NULL) {
-      free(oldblock);
       return exit_zlib(z, &k->zlib_init, CURLE_OUT_OF_MEMORY);
     }
     /* Append the new block of data to the previous one */
     memcpy(z->next_in + z->avail_in - nread, k->str, nread);
 
-    switch (check_gzip_header(z->next_in, z->avail_in, &hlen)) {
+    switch(check_gzip_header(z->next_in, z->avail_in, &hlen)) {
     case GZIP_OK:
       /* This is the zlib stream data */
       free(z->next_in);
@@ -416,7 +422,7 @@ Curl_unencode_gzip_write(struct connectdata *conn,
 
 void Curl_unencode_cleanup(struct connectdata *conn)
 {
-  struct SessionHandle *data = conn->data;
+  struct Curl_easy *data = conn->data;
   struct SingleRequest *k = &data->req;
   z_stream *z = &k->z;
   if(k->zlib_init != ZLIB_UNINIT)