X-Git-Url: https://git.openssl.org/?a=blobdiff_plain;f=ssl%2Fpacket_locl.h;h=8e553e62b5ac29e731cb65da6d4e83c29fb20670;hb=a9a157e74a0c6a886e593426f263f3d7359497b9;hp=94933c1a079ad6874331b8bf0ce3145162f6f9fb;hpb=ff04799d904ec2bfcfc3a3ca656549db2dec9068;p=openssl.git

diff --git a/ssl/packet_locl.h b/ssl/packet_locl.h
index 94933c1a07..8e553e62b5 100644
--- a/ssl/packet_locl.h
+++ b/ssl/packet_locl.h
@@ -625,6 +625,9 @@ struct wpacket_st {
     /* The buffer where we store the output data */
     BUF_MEM *buf;
 
+    /* Fixed sized buffer which can be used as an alternative to buf */
+    unsigned char *staticbuf;
+
     /*
      * Offset into the buffer where we are currently writing. We use an offset
      * in case the buffer grows and gets reallocated.
@@ -670,6 +673,13 @@ int WPACKET_init_len(WPACKET *pkt, BUF_MEM *buf, size_t lenbytes);
  */
 int WPACKET_init(WPACKET *pkt, BUF_MEM *buf);
 
+/*
+ * Same as WPACKET_init_len except we do not use a growable BUF_MEM structure.
+ * A fixed buffer of memory |buf| of size |len| is used instead. A failure will
+ * occur if you attempt to write beyond the end of the buffer
+ */
+int WPACKET_init_static_len(WPACKET *pkt, unsigned char *buf, size_t len,
+                            size_t lenbytes);
 /*
  * Set the flags to be applied to the current sub-packet
  */
@@ -689,6 +699,15 @@ int WPACKET_close(WPACKET *pkt);
  */
 int WPACKET_finish(WPACKET *pkt);
 
+/*
+ * Iterate through all the sub-packets and write out their lengths as if they
+ * were being closed. The lengths will be overwritten with the final lengths
+ * when the sub-packets are eventually closed (which may be different if more
+ * data is added to the WPACKET). This function fails if a sub-packet is of 0
+ * length and WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH is set.
+ */
+int WPACKET_fill_lengths(WPACKET *pkt);
+
 /*
  * Initialise a new sub-packet. Additionally |lenbytes| of data is preallocated
  * at the start of the sub-packet to store its length once we know it. Don't
@@ -718,7 +737,7 @@ int WPACKET_start_sub_packet(WPACKET *pkt);
 /*
  * Allocate bytes in the WPACKET for the output. This reserves the bytes
  * and counts them as "written", but doesn't actually do the writing. A pointer
- * to the allocated bytes is stored in |*allocbytes|.
+ * to the allocated bytes is stored in |*allocbytes|. |allocbytes| may be NULL.
  * WARNING: the allocated bytes must be filled in immediately, without further
  * WPACKET_* calls. If not then the underlying buffer may be realloc'd and
  * change its location.
@@ -814,6 +833,9 @@ int WPACKET_set_max_size(WPACKET *pkt, size_t maxsize);
 /* Copy |len| bytes of data from |*src| into the WPACKET. */
 int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len);
 
+/* Set |len| bytes of data to |ch| into the WPACKET. */
+int WPACKET_memset(WPACKET *pkt, int ch, size_t len);
+
 /*
  * Copy |len| bytes of data from |*src| into the WPACKET and prefix with its
  * length (consuming |lenbytes| of data for the length). Don't call this
@@ -844,6 +866,12 @@ int WPACKET_get_total_written(WPACKET *pkt, size_t *written);
  */
 int WPACKET_get_length(WPACKET *pkt, size_t *len);
 
+/*
+ * Returns a pointer to the current write location, but does not allocate any
+ * bytes.
+ */
+unsigned char *WPACKET_get_curr(WPACKET *pkt);
+
 /* Release resources in a WPACKET if a failure has occurred. */
 void WPACKET_cleanup(WPACKET *pkt);