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spdylay/lib/spdylay_frame.c
Tatsuhiro Tsujikawa d4c5f39cf9 Don't check multiple in-sequence NULL in spdylay_frame_count_unpack_nv_space 
If we return negative error code in that function, it means frame will not
unpacked and ends up to lose any information the frame contains.
The spec says it should send RST_STREAM with PROTOCOL_ERROR, so we need
at least stream ID.
Therefore, the check should be performed in
spdylay_session_on_syn_stream_received().
2012-02-05 21:57:55 +09:00

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/*
* Spdylay - SPDY Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "spdylay_frame.h"
#include <arpa/inet.h>
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include "spdylay_helper.h"
static uint8_t spdylay_unpack_pri(const uint8_t *data)
{
return (data[0] >> 6) & 0x3;
}
static uint8_t* spdylay_pack_str(uint8_t *buf, const char *str, size_t len)
{
spdylay_put_uint16be(buf, len);
buf += 2;
memcpy(buf, str, len);
return buf+len;
}
static void spdylay_frame_pack_ctrl_hd(uint8_t* buf, const spdylay_ctrl_hd *hd)
{
spdylay_put_uint16be(&buf[0], hd->version);
buf[0] |= 1 << 7;
spdylay_put_uint16be(&buf[2], hd->type);
spdylay_put_uint32be(&buf[4], hd->length);
buf[4] = hd->flags;
}
static void spdylay_frame_unpack_ctrl_hd(spdylay_ctrl_hd *hd,
const uint8_t* buf)
{
hd->version = spdylay_get_uint16(buf) & SPDYLAY_VERSION_MASK;
hd->type = spdylay_get_uint16(&buf[2]);
hd->flags = buf[4];
hd->length = spdylay_get_uint32(&buf[4]) & SPDYLAY_LENGTH_MASK;
}
static ssize_t spdylay_frame_alloc_pack_nv(uint8_t **buf_ptr,
char **nv, size_t nv_offset,
spdylay_zlib *deflater)
{
size_t nvbuflen = spdylay_frame_count_nv_space(nv);
uint8_t *nvbuf = malloc(nvbuflen);
size_t maxframelen = nv_offset+
spdylay_zlib_deflate_hd_bound(deflater, nvbuflen);
uint8_t *framebuf = malloc(maxframelen);
ssize_t framelen;
spdylay_frame_pack_nv(nvbuf, nv);
framelen = spdylay_zlib_deflate_hd(deflater,
framebuf+nv_offset,
maxframelen-nv_offset,
nvbuf, nvbuflen);
free(nvbuf);
if(framelen < 0) {
free(framebuf);
return framelen;
}
framelen += nv_offset;
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_count_unpack_nv_space
(size_t *nvlen_ptr, size_t *buflen_ptr, const uint8_t *in, size_t inlen)
{
uint16_t n;
size_t buflen = 0;
size_t nvlen = 0;
size_t off = 0;
const size_t len_size = sizeof(uint16_t);
int i;
if(inlen < len_size) {
return SPDYLAY_ERR_INVALID_ARGUMENT;
}
n = spdylay_get_uint16(in);
off += len_size;
for(i = 0; i < n; ++i) {
uint16_t len;
int j;
for(j = 0; j < 2; ++j) {
if(inlen-off < len_size) {
return SPDYLAY_ERR_INVALID_ARGUMENT;
}
len = spdylay_get_uint16(in+off);
off += 2;
if(inlen-off < len) {
return SPDYLAY_ERR_INVALID_ARGUMENT;
}
buflen += len+1;
off += len;
}
for(off -= len, j = off+len; off != j; ++off) {
if(in[off] == '\0') {
++nvlen;
}
}
++nvlen;
}
*nvlen_ptr = nvlen;
*buflen_ptr = buflen+(nvlen*2+1)*sizeof(char*);
return 0;
}
int spdylay_frame_unpack_nv(char ***nv_ptr, const uint8_t *in, size_t inlen)
{
size_t nvlen, buflen;
int r, i;
char *buf, **index, *data;
uint16_t n;
r = spdylay_frame_count_unpack_nv_space(&nvlen, &buflen, in, inlen);
if(r != 0) {
return r;
}
buf = malloc(buflen);
if(buf == NULL) {
return SPDYLAY_ERR_NOMEM;
}
index = (char**)buf;
data = buf+(nvlen*2+1)*sizeof(char*);
n = spdylay_get_uint16(in);
in += 2;
for(i = 0; i < n; ++i) {
uint16_t len;
char *name, *val;
char *stop;
len = spdylay_get_uint16(in);
in += 2;
name = data;
memcpy(data, in, len);
data += len;
*data = '\0';
++data;
in += len;
len = spdylay_get_uint16(in);
in += 2;
val = data;
memcpy(data, in, len);
for(stop = data+len; data != stop; ++data) {
if(*data == '\0') {
*index++ = name;
*index++ = val;
val = data+1;
}
}
*data = '\0';
++data;
in += len;
*index++ = name;
*index++ = val;
}
*index = NULL;
assert((char*)index-buf == (nvlen*2)*sizeof(char*));
*nv_ptr = (char**)buf;
return 0;
}
static int spdylay_frame_alloc_unpack_nv(char ***nv_ptr,
const uint8_t *in, size_t inlen,
spdylay_zlib *inflater)
{
ssize_t r;
spdylay_buffer outbuffer;
spdylay_buffer_init(&outbuffer, 4096);
r = spdylay_zlib_inflate_hd(inflater, &outbuffer, in, inlen);
if(r < 0) {
spdylay_buffer_free(&outbuffer);
return r;
} else {
uint8_t *buf = malloc(r);
if(buf == NULL) {
spdylay_buffer_free(&outbuffer);
return SPDYLAY_ERR_NOMEM;
}
spdylay_buffer_serialize(&outbuffer, buf);
spdylay_buffer_free(&outbuffer);
r = spdylay_frame_unpack_nv(nv_ptr, buf, r);
free(buf);
return r;
}
}
size_t spdylay_frame_count_nv_space(char **nv)
{
size_t sum = 2;
int i;
const char *prev = "";
size_t prevlen = 0;
for(i = 0; nv[i]; i += 2) {
const char *key = nv[i];
const char *val = nv[i+1];
size_t keylen = strlen(key);
size_t vallen = strlen(val);
if(prevlen == keylen && memcmp(prev, key, keylen) == 0) {
/* Join previous value, with NULL character */
sum += vallen+1;
} else {
prev = key;
/* SPDY NV header does not include terminating NULL byte */
sum += keylen+vallen+4;
}
}
return sum;
}
ssize_t spdylay_frame_pack_nv(uint8_t *buf, char **nv)
{
int i;
uint8_t *bufp = buf+2;
uint16_t num_nv = 0;
/* TODO Join values with same keys, using '\0' as a delimiter */
const char *prev = "";
uint8_t *prev_vallen_buf = NULL;
uint16_t prev_vallen = 0;
for(i = 0; nv[i]; i += 2) {
const char *key = nv[i];
const char *val = nv[i+1];
size_t keylen = strlen(key);
size_t vallen = strlen(val);
if(strcmp(prev, key) == 0) {
prev_vallen += vallen+1;
spdylay_put_uint16be(prev_vallen_buf, prev_vallen);
*bufp = '\0';
++bufp;
memcpy(bufp, val, vallen);
bufp += vallen;
} else {
++num_nv;
bufp = spdylay_pack_str(bufp, key, keylen);
prev = key;
prev_vallen_buf = bufp;
prev_vallen = vallen;
bufp = spdylay_pack_str(bufp, val, vallen);
}
}
spdylay_put_uint16be(buf, num_nv);
return bufp-buf;
}
int spdylay_frame_is_ctrl_frame(uint8_t first_byte)
{
return first_byte & 0x80;
}
void spdylay_frame_nv_del(char **nv)
{
free(nv);
}
char** spdylay_frame_nv_copy(const char **nv)
{
int i;
char *buf;
char **index, *data;
size_t buflen = 0;
for(i = 0; nv[i]; ++i) {
buflen += strlen(nv[i])+1;
}
buflen += (i+1)*sizeof(char*);
buf = malloc(buflen);
if(buf == NULL) {
return NULL;
}
index = (char**)buf;
data = buf+(i+1)*sizeof(char*);
for(i = 0; nv[i]; ++i) {
size_t len = strlen(nv[i])+1;
memcpy(data, nv[i], len);
*index++ = data;
data += len;
}
*index = NULL;
return (char**)buf;
}
static int spdylay_string_compar(const void *lhs, const void *rhs)
{
return strcmp(*(char **)lhs, *(char **)rhs);
}
void spdylay_frame_nv_sort(char **nv)
{
int n;
for(n = 0; nv[n]; ++n);
qsort(nv, n/2, 2*sizeof(char*), spdylay_string_compar);
}
void spdylay_frame_syn_stream_init(spdylay_syn_stream *frame, uint8_t flags,
int32_t stream_id, int32_t assoc_stream_id,
uint8_t pri, char **nv)
{
memset(frame, 0, sizeof(spdylay_syn_stream));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_SYN_STREAM;
frame->hd.flags = flags;
frame->stream_id = stream_id;
frame->assoc_stream_id = assoc_stream_id;
frame->pri = pri;
frame->nv = nv;
}
void spdylay_frame_syn_stream_free(spdylay_syn_stream *frame)
{
spdylay_frame_nv_del(frame->nv);
}
void spdylay_frame_syn_reply_init(spdylay_syn_reply *frame, uint8_t flags,
int32_t stream_id, char **nv)
{
memset(frame, 0, sizeof(spdylay_syn_reply));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_SYN_REPLY;
frame->hd.flags = flags;
frame->stream_id = stream_id;
frame->nv = nv;
}
void spdylay_frame_syn_reply_free(spdylay_syn_reply *frame)
{
spdylay_frame_nv_del(frame->nv);
}
void spdylay_frame_ping_init(spdylay_ping *frame, uint32_t unique_id)
{
memset(frame, 0, sizeof(spdylay_ping));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_PING;
frame->hd.flags = SPDYLAY_FLAG_NONE;
frame->hd.length = 4;
frame->unique_id = unique_id;
}
void spdylay_frame_ping_free(spdylay_ping *frame)
{}
void spdylay_frame_goaway_init(spdylay_goaway *frame,
int32_t last_good_stream_id)
{
memset(frame, 0, sizeof(spdylay_goaway));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_GOAWAY;
frame->hd.length = 4;
frame->last_good_stream_id = last_good_stream_id;
}
void spdylay_frame_goaway_free(spdylay_goaway *frame)
{}
void spdylay_frame_headers_init(spdylay_headers *frame, uint8_t flags,
int32_t stream_id, char **nv)
{
memset(frame, 0, sizeof(spdylay_headers));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_HEADERS;
frame->hd.flags = flags;
frame->stream_id = stream_id;
frame->nv = nv;
}
void spdylay_frame_headers_free(spdylay_headers *frame)
{
spdylay_frame_nv_del(frame->nv);
}
void spdylay_frame_rst_stream_init(spdylay_rst_stream *frame,
int32_t stream_id, uint32_t status_code)
{
memset(frame, 0, sizeof(spdylay_rst_stream));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_RST_STREAM;
frame->hd.flags = 0;
frame->hd.length = 8;
frame->stream_id = stream_id;
frame->status_code = status_code;
}
void spdylay_frame_rst_stream_free(spdylay_rst_stream *frame)
{}
void spdylay_frame_settings_init(spdylay_settings *frame, uint8_t flags,
spdylay_settings_entry *iv, size_t niv)
{
memset(frame, 0, sizeof(spdylay_settings));
frame->hd.version = SPDYLAY_PROTO_VERSION;
frame->hd.type = SPDYLAY_SETTINGS;
frame->hd.flags = flags;
frame->hd.length = 4+niv*8;
frame->niv = niv;
frame->iv = iv;
}
void spdylay_frame_settings_free(spdylay_settings *frame)
{
free(frame->iv);
}
void spdylay_frame_data_init(spdylay_data *frame, int32_t stream_id,
spdylay_data_provider *data_prd)
{
memset(frame, 0, sizeof(spdylay_data));
frame->stream_id = stream_id;
frame->data_prd = *data_prd;
}
void spdylay_frame_data_free(spdylay_data *frame)
{}
#define SPDYLAY_SYN_STREAM_NV_OFFSET 18
ssize_t spdylay_frame_pack_syn_stream(uint8_t **buf_ptr,
spdylay_syn_stream *frame,
spdylay_zlib *deflater)
{
uint8_t *framebuf = NULL;
ssize_t framelen;
framelen = spdylay_frame_alloc_pack_nv(&framebuf, frame->nv,
SPDYLAY_SYN_STREAM_NV_OFFSET,
deflater);
if(framelen < 0) {
return framelen;
}
frame->hd.length = framelen-SPDYLAY_FRAME_HEAD_LENGTH;
memset(framebuf, 0, SPDYLAY_SYN_STREAM_NV_OFFSET);
/* pack ctrl header after length is determined */
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->stream_id);
spdylay_put_uint32be(&framebuf[12], frame->assoc_stream_id);
framebuf[16] = (frame->pri << 6);
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_syn_stream(spdylay_syn_stream *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
spdylay_zlib *inflater)
{
int r;
if(payloadlen < 12) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->stream_id = spdylay_get_uint32(payload) & SPDYLAY_STREAM_ID_MASK;
frame->assoc_stream_id =
spdylay_get_uint32(payload+4) & SPDYLAY_STREAM_ID_MASK;
frame->pri = spdylay_unpack_pri(payload+8);
r = spdylay_frame_alloc_unpack_nv(&frame->nv, payload+10, payloadlen-10,
inflater);
return r;
}
#define SPDYLAY_SYN_REPLY_NV_OFFSET 14
ssize_t spdylay_frame_pack_syn_reply(uint8_t **buf_ptr,
spdylay_syn_reply *frame,
spdylay_zlib *deflater)
{
uint8_t *framebuf = NULL;
ssize_t framelen;
framelen = spdylay_frame_alloc_pack_nv(&framebuf, frame->nv,
SPDYLAY_SYN_REPLY_NV_OFFSET, deflater);
if(framelen < 0) {
return framelen;
}
frame->hd.length = framelen-SPDYLAY_FRAME_HEAD_LENGTH;
memset(framebuf, 0, SPDYLAY_SYN_REPLY_NV_OFFSET);
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->stream_id);
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_syn_reply(spdylay_syn_reply *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
spdylay_zlib *inflater)
{
int r;
if(payloadlen < 8) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->stream_id = spdylay_get_uint32(payload) & SPDYLAY_STREAM_ID_MASK;
r = spdylay_frame_alloc_unpack_nv(&frame->nv, payload+6, payloadlen-6,
inflater);
return r;
}
ssize_t spdylay_frame_pack_ping(uint8_t **buf_ptr, spdylay_ping *frame)
{
uint8_t *framebuf = NULL;
ssize_t framelen = 12;
framebuf = malloc(framelen);
if(framebuf == NULL) {
return SPDYLAY_ERR_NOMEM;
}
memset(framebuf, 0, framelen);
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->unique_id);
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_ping(spdylay_ping *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
if(payloadlen < 4) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->unique_id = spdylay_get_uint32(payload);
return 0;
}
ssize_t spdylay_frame_pack_goaway(uint8_t **buf_ptr, spdylay_goaway *frame)
{
uint8_t *framebuf = NULL;
ssize_t framelen = 12;
framebuf = malloc(framelen);
if(framebuf == NULL) {
return SPDYLAY_ERR_NOMEM;
}
memset(framebuf, 0, framelen);
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->last_good_stream_id);
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_goaway(spdylay_goaway *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
if(payloadlen < 4) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->last_good_stream_id = spdylay_get_uint32(payload) &
SPDYLAY_STREAM_ID_MASK;
return 0;
}
#define SPDYLAY_HEADERS_NV_OFFSET 14
ssize_t spdylay_frame_pack_headers(uint8_t **buf_ptr,
spdylay_headers *frame,
spdylay_zlib *deflater)
{
uint8_t *framebuf = NULL;
ssize_t framelen;
framelen = spdylay_frame_alloc_pack_nv(&framebuf, frame->nv,
SPDYLAY_HEADERS_NV_OFFSET, deflater);
if(framelen < 0) {
return framelen;
}
frame->hd.length = framelen-SPDYLAY_FRAME_HEAD_LENGTH;
memset(framebuf, 0, SPDYLAY_HEADERS_NV_OFFSET);
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->stream_id);
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_headers(spdylay_headers *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
spdylay_zlib *inflater)
{
int r;
if(payloadlen < 8) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->stream_id = spdylay_get_uint32(payload) & SPDYLAY_STREAM_ID_MASK;
r = spdylay_frame_alloc_unpack_nv(&frame->nv, payload+6, payloadlen-6,
inflater);
return r;
}
ssize_t spdylay_frame_pack_rst_stream(uint8_t **buf_ptr,
spdylay_rst_stream *frame)
{
uint8_t *framebuf;
ssize_t framelen = 16;
framebuf = malloc(framelen);
if(framebuf == NULL) {
return SPDYLAY_ERR_NOMEM;
}
memset(framebuf, 0, framelen);
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->stream_id);
spdylay_put_uint32be(&framebuf[12], frame->status_code);
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_rst_stream(spdylay_rst_stream *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
if(payloadlen < 8) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->stream_id = spdylay_get_uint32(payload) & SPDYLAY_STREAM_ID_MASK;
frame->status_code = spdylay_get_uint32(payload+4);
return 0;
}
ssize_t spdylay_frame_pack_settings(uint8_t **buf_ptr, spdylay_settings *frame)
{
uint8_t *framebuf;
ssize_t framelen = SPDYLAY_FRAME_HEAD_LENGTH+frame->hd.length;
int i;
framebuf = malloc(framelen);
if(framebuf == NULL) {
return SPDYLAY_ERR_NOMEM;
}
memset(framebuf, 0, framelen);
spdylay_frame_pack_ctrl_hd(framebuf, &frame->hd);
spdylay_put_uint32be(&framebuf[8], frame->niv);
for(i = 0; i < frame->niv; ++i) {
int off = i*8;
/* spdy/2 spec says ID is network byte order, but publicly
deployed server sends little endian host byte order. */
char *id_ptr = (char*)(&frame->iv[i].settings_id);
#ifdef WORDS_BIGENDIAN
framebuf[12+off] = id_ptr[3];
framebuf[12+off+1] = id_ptr[2];
framebuf[12+off+2] = id_ptr[1];
#else /* !WORDS_BIGENDIAN */
memcpy(&framebuf[12+off], id_ptr, 3);
#endif /* !WORDS_BIGENDIAN */
framebuf[15+off] = frame->iv[i].flags;
spdylay_put_uint32be(&framebuf[16+off], frame->iv[i].value);
}
*buf_ptr = framebuf;
return framelen;
}
int spdylay_frame_unpack_settings(spdylay_settings *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
int i;
if(payloadlen < 4) {
return SPDYLAY_ERR_INVALID_FRAME;
}
spdylay_frame_unpack_ctrl_hd(&frame->hd, head);
frame->niv = spdylay_get_uint32(payload);
if(payloadlen != 4+frame->niv*8) {
return SPDYLAY_ERR_INVALID_FRAME;
}
frame->iv = malloc(frame->niv*sizeof(spdylay_settings_entry));
if(frame->iv == NULL) {
return SPDYLAY_ERR_NOMEM;
}
for(i = 0; i < frame->niv; ++i) {
int off = i*8;
/* ID is little endian. See comments in
spdylay_frame_pack_settings(). */
frame->iv[i].settings_id = 0;
#ifdef WORDS_BIGENDIAN
*(char*)(&frame->iv[i].settings_id[1]) = &payload[4+off+2];
*(char*)(&frame->iv[i].settings_id[2]) = &payload[4+off+1];
*(char*)(&frame->iv[i].settings_id[3]) = &payload[4+off+0];
#else /* !WORDS_BIGENDIAN */
memcpy(&frame->iv[i].settings_id, &payload[4+off], 3);
#endif /* !WORDS_BIGENDIAN */
frame->iv[i].flags = payload[7+off];
frame->iv[i].value = spdylay_get_uint32(&payload[8+off]);
}
return 0;
}
spdylay_settings_entry* spdylay_frame_iv_copy(const spdylay_settings_entry *iv,
size_t niv)
{
spdylay_settings_entry *iv_copy;
size_t len = niv*sizeof(spdylay_settings_entry);
iv_copy = malloc(len);
if(iv_copy == NULL) {
return NULL;
}
memcpy(iv_copy, iv, len);
return iv_copy;
}
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