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nghttp2/lib/nghttp2_frame.c

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/*
* nghttp2 - HTTP/2.0 C Library
*
* Copyright (c) 2013 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 "nghttp2_frame.h"
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include "nghttp2_helper.h"
#include "nghttp2_net.h"
/* This is SPDY stuff, and will be removed after header compression is
implemented */
static size_t nghttp2_frame_get_len_size(void)
{
return 2;
}
static uint8_t* nghttp2_pack_str(uint8_t *buf, const char *str, size_t len)
{
nghttp2_frame_put_nv_len(buf, len);
buf += nghttp2_frame_get_len_size();
memcpy(buf, str, len);
return buf+len;
}
int nghttp2_frame_is_data_frame(uint8_t *head)
{
return head[2] == 0;
}
void nghttp2_frame_pack_frame_hd(uint8_t* buf, const nghttp2_frame_hd *hd)
{
nghttp2_put_uint16be(&buf[0], hd->length);
buf[2]= hd->type;
buf[3] = hd->flags;
nghttp2_put_uint32be(&buf[4], hd->stream_id);
}
void nghttp2_frame_unpack_frame_hd(nghttp2_frame_hd *hd, const uint8_t* buf)
{
hd->length = nghttp2_get_uint16(&buf[0]);
hd->type = buf[2];
hd->flags = buf[3];
hd->stream_id = nghttp2_get_uint32(&buf[4]) & NGHTTP2_STREAM_ID_MASK;
}
ssize_t nghttp2_frame_alloc_pack_nv(uint8_t **buf_ptr,
size_t *buflen_ptr,
uint8_t **nvbuf_ptr,
size_t *nvbuflen_ptr,
char **nv, size_t nv_offset,
size_t len_size,
nghttp2_zlib *deflater)
{
size_t nvspace;
size_t maxframelen;
ssize_t framelen;
int r;
nvspace = nghttp2_frame_count_nv_space(nv, len_size);
r = nghttp2_reserve_buffer(nvbuf_ptr, nvbuflen_ptr, nvspace);
if(r != 0) {
return NGHTTP2_ERR_NOMEM;
}
maxframelen = nv_offset+nghttp2_zlib_deflate_hd_bound(deflater, nvspace);
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, maxframelen);
if(r != 0) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_frame_pack_nv(*nvbuf_ptr, nv, len_size);
framelen = nghttp2_zlib_deflate_hd(deflater,
(*buf_ptr)+nv_offset,
maxframelen-nv_offset,
*nvbuf_ptr, nvspace);
if(framelen < 0) {
return framelen;
}
framelen += nv_offset;
if(framelen - NGHTTP2_FRAME_HEAD_LENGTH >= 1 << 16) {
/* Max frame size is 2**16 - 1 */
return NGHTTP2_ERR_FRAME_TOO_LARGE;
}
return framelen;
}
int nghttp2_frame_count_unpack_nv_space(size_t *nvlen_ptr, size_t *buflen_ptr,
nghttp2_buffer *in, size_t len_size)
{
uint32_t n;
size_t buflen = 0;
size_t nvlen = 0;
size_t off = 0;
size_t inlen = nghttp2_buffer_length(in);
size_t i;
nghttp2_buffer_reader reader;
if(inlen < len_size) {
return NGHTTP2_ERR_INVALID_FRAME;
}
nghttp2_buffer_reader_init(&reader, in);
/* TODO limit n in a reasonable number */
n = nghttp2_frame_get_nv_len(&reader);
off += len_size;
for(i = 0; i < n; ++i) {
uint32_t len;
size_t j;
for(j = 0; j < 2; ++j) {
if(inlen-off < len_size) {
return NGHTTP2_ERR_INVALID_FRAME;
}
len = nghttp2_frame_get_nv_len(&reader);
off += len_size;
if(inlen-off < len) {
return NGHTTP2_ERR_INVALID_FRAME;
}
buflen += len+1;
off += len;
if(j == 0) {
nghttp2_buffer_reader_advance(&reader, len);
}
}
nvlen += nghttp2_buffer_reader_count(&reader, len, '\0');
++nvlen;
}
if(inlen == off) {
*nvlen_ptr = nvlen;
*buflen_ptr = buflen+(nvlen*2+1)*sizeof(char*);
return 0;
} else {
return NGHTTP2_ERR_INVALID_FRAME;
}
}
int nghttp2_frame_unpack_nv(char ***nv_ptr, nghttp2_buffer *in,
size_t len_size)
{
size_t nvlen, buflen;
int r;
size_t i;
char *buf, **idx, *data;
uint32_t n;
int invalid_header_block = 0;
nghttp2_buffer_reader reader;
r = nghttp2_frame_count_unpack_nv_space(&nvlen, &buflen, in, len_size);
if(r != 0) {
return r;
}
buf = malloc(buflen);
if(buf == NULL) {
return NGHTTP2_ERR_NOMEM;
}
nghttp2_buffer_reader_init(&reader, in);
idx = (char**)buf;
data = buf+(nvlen*2+1)*sizeof(char*);
n = nghttp2_frame_get_nv_len(&reader);
for(i = 0; i < n; ++i) {
uint32_t len;
char *name, *val;
char *stop;
int multival;
len = nghttp2_frame_get_nv_len(&reader);
if(len == 0) {
invalid_header_block = 1;
}
name = data;
nghttp2_buffer_reader_data(&reader, (uint8_t*)data, len);
for(stop = data+len; data != stop; ++data) {
unsigned char c = *data;
if(c < 0x20 || c > 0x7e || ('A' <= c && c <= 'Z')) {
invalid_header_block = 1;
}
}
*data = '\0';
++data;
len = nghttp2_frame_get_nv_len(&reader);
val = data;
nghttp2_buffer_reader_data(&reader, (uint8_t*)data, len);
multival = 0;
for(stop = data+len; data != stop; ++data) {
if(*data == '\0') {
*idx++ = name;
*idx++ = val;
if(val == data) {
invalid_header_block = 1;
}
val = data+1;
multival = 1;
}
}
*data = '\0';
/* Check last header value is empty if NULL separator was
found. */
if(multival && val == data) {
invalid_header_block = 1;
}
++data;
*idx++ = name;
*idx++ = val;
}
*idx = NULL;
assert((size_t)((char*)idx - buf) == (nvlen*2)*sizeof(char*));
*nv_ptr = (char**)buf;
if(!invalid_header_block) {
nghttp2_frame_nv_sort(*nv_ptr);
for(i = 2; i < nvlen*2; i += 2) {
if(strcmp((*nv_ptr)[i-2], (*nv_ptr)[i]) == 0 &&
(*nv_ptr)[i-2] != (*nv_ptr)[i]) {
invalid_header_block = 1;
break;
}
}
}
return invalid_header_block ? NGHTTP2_ERR_INVALID_HEADER_BLOCK : 0;
}
size_t nghttp2_frame_count_nv_space(char **nv, size_t len_size)
{
size_t sum = len_size;
int i;
const char *prev = "";
size_t prevlen = 0;
size_t prevvallen = 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) {
if(vallen) {
if(prevvallen) {
/* Join previous value, with NULL character */
sum += vallen+1;
prevvallen = vallen;
} else {
/* Previous value is empty. In this case, drop the
previous. */
sum += vallen;
}
}
} else {
prev = key;
prevlen = keylen;
prevvallen = vallen;
/* SPDY NV header does not include terminating NULL byte */
sum += keylen+vallen+len_size*2;
}
}
return sum;
}
ssize_t nghttp2_frame_pack_nv(uint8_t *buf, char **nv, size_t len_size)
{
int i;
uint8_t *bufp = buf+len_size;
uint32_t num_nv = 0;
const char *prev = "";
uint8_t *cur_vallen_buf = NULL;
uint32_t cur_vallen = 0;
size_t prevkeylen = 0;
size_t prevvallen = 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(prevkeylen == keylen && memcmp(prev, key, keylen) == 0) {
if(vallen) {
if(prevvallen) {
/* Join previous value, with NULL character */
cur_vallen += vallen+1;
nghttp2_frame_put_nv_len(cur_vallen_buf, cur_vallen);
*bufp = '\0';
++bufp;
memcpy(bufp, val, vallen);
bufp += vallen;
} else {
/* Previous value is empty. In this case, drop the
previous. */
cur_vallen += vallen;
nghttp2_frame_put_nv_len(cur_vallen_buf, cur_vallen);
memcpy(bufp, val, vallen);
bufp += vallen;
}
}
} else {
++num_nv;
bufp = nghttp2_pack_str(bufp, key, keylen);
prev = key;
cur_vallen_buf = bufp;
cur_vallen = vallen;
prevkeylen = keylen;
prevvallen = vallen;
bufp = nghttp2_pack_str(bufp, val, vallen);
}
}
nghttp2_frame_put_nv_len(buf, num_nv);
return bufp-buf;
}
void nghttp2_frame_nv_del(char **nv)
{
free(nv);
}
char** nghttp2_frame_nv_copy(const char **nv)
{
int i;
char *buf;
char **idx, *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;
}
idx = (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);
*idx++ = data;
data += len;
}
*idx = NULL;
return (char**)buf;
}
static int nghttp2_string_compar(const void *lhs, const void *rhs)
{
return strcmp(*(char **)lhs, *(char **)rhs);
}
void nghttp2_frame_nv_sort(char **nv)
{
int n;
for(n = 0; nv[n]; ++n);
qsort(nv, n/2, 2*sizeof(char*), nghttp2_string_compar);
}
void nghttp2_frame_nv_downcase(char **nv)
{
int i, j;
for(i = 0; nv[i]; i += 2) {
for(j = 0; nv[i][j] != '\0'; ++j) {
if('A' <= nv[i][j] && nv[i][j] <= 'Z') {
nv[i][j] += 'a'-'A';
}
}
}
}
char** nghttp2_frame_nv_norm_copy(const char **nv)
{
char **nv_copy;
nv_copy = nghttp2_frame_nv_copy(nv);
if(nv_copy != NULL) {
nghttp2_frame_nv_downcase(nv_copy);
nghttp2_frame_nv_sort(nv_copy);
}
return nv_copy;
}
static void nghttp2_frame_set_hd(nghttp2_frame_hd *hd, uint16_t length,
uint8_t type, uint8_t flags,
int32_t stream_id)
{
hd->length = length;
hd->type = type;
hd->flags = flags;
hd->stream_id = stream_id;
}
void nghttp2_frame_headers_init(nghttp2_headers *frame,
uint8_t flags, int32_t stream_id, int32_t pri,
char **nv)
{
memset(frame, 0, sizeof(nghttp2_headers));
nghttp2_frame_set_hd(&frame->hd, 0, NGHTTP2_HEADERS, flags, stream_id);
frame->pri = pri;
frame->nv = nv;
frame->cat = NGHTTP2_HCAT_START_STREAM;
}
void nghttp2_frame_headers_free(nghttp2_headers *frame)
{
nghttp2_frame_nv_del(frame->nv);
}
void nghttp2_frame_priority_init(nghttp2_priority *frame, int32_t stream_id,
int32_t pri)
{
memset(frame, 0, sizeof(nghttp2_priority));
nghttp2_frame_set_hd(&frame->hd, 4, NGHTTP2_PRIORITY, NGHTTP2_FLAG_NONE,
stream_id);
frame->pri = pri;
}
void nghttp2_frame_priority_free(nghttp2_priority *frame)
{}
void nghttp2_frame_rst_stream_init(nghttp2_rst_stream *frame,
int32_t stream_id,
nghttp2_error_code error_code)
{
memset(frame, 0, sizeof(nghttp2_rst_stream));
nghttp2_frame_set_hd(&frame->hd, 4, NGHTTP2_RST_STREAM, NGHTTP2_FLAG_NONE,
stream_id);
frame->error_code = error_code;
}
void nghttp2_frame_rst_stream_free(nghttp2_rst_stream *frame)
{}
void nghttp2_frame_settings_init(nghttp2_settings *frame,
nghttp2_settings_entry *iv, size_t niv)
{
memset(frame, 0, sizeof(nghttp2_settings));
nghttp2_frame_set_hd(&frame->hd, niv*8, NGHTTP2_SETTINGS, NGHTTP2_FLAG_NONE,
0);
frame->niv = niv;
frame->iv = iv;
}
void nghttp2_frame_settings_free(nghttp2_settings *frame)
{
free(frame->iv);
}
void nghttp2_frame_ping_init(nghttp2_ping *frame, uint8_t flags,
const uint8_t *opaque_data)
{
memset(frame, 0, sizeof(nghttp2_ping));
nghttp2_frame_set_hd(&frame->hd, 8, NGHTTP2_PING, flags, 0);
if(opaque_data) {
memcpy(frame->opaque_data, opaque_data, sizeof(frame->opaque_data));
}
}
void nghttp2_frame_ping_free(nghttp2_ping *frame)
{}
void nghttp2_frame_goaway_init(nghttp2_goaway *frame, int32_t last_stream_id,
nghttp2_error_code error_code,
uint8_t *opaque_data, size_t opaque_data_len)
{
memset(frame, 0, sizeof(nghttp2_goaway));
nghttp2_frame_set_hd(&frame->hd, 8+opaque_data_len, NGHTTP2_GOAWAY,
NGHTTP2_FLAG_NONE, 0);
frame->last_stream_id = last_stream_id;
frame->error_code = error_code;
frame->opaque_data = opaque_data;
frame->opaque_data_len = opaque_data_len;
}
void nghttp2_frame_goaway_free(nghttp2_goaway *frame)
{
free(frame->opaque_data);
}
void nghttp2_frame_window_update_init(nghttp2_window_update *frame,
uint8_t flags,
int32_t stream_id,
int32_t window_size_increment)
{
memset(frame, 0, sizeof(nghttp2_window_update));
nghttp2_frame_set_hd(&frame->hd, 4, NGHTTP2_WINDOW_UPDATE, flags, stream_id);
frame->window_size_increment = window_size_increment;
}
void nghttp2_frame_window_update_free(nghttp2_window_update *frame)
{}
void nghttp2_frame_data_init(nghttp2_data *frame, uint8_t flags,
int32_t stream_id,
const nghttp2_data_provider *data_prd)
{
memset(frame, 0, sizeof(nghttp2_data));
/* At this moment, the length of DATA frame is unknown */
nghttp2_frame_set_hd(&frame->hd, 0, NGHTTP2_DATA, flags, stream_id);
frame->data_prd = *data_prd;
}
void nghttp2_frame_data_free(nghttp2_data *frame)
{}
ssize_t nghttp2_frame_pack_headers(uint8_t **buf_ptr,
size_t *buflen_ptr,
uint8_t **nvbuf_ptr,
size_t *nvbuflen_ptr,
nghttp2_headers *frame,
nghttp2_zlib *deflater)
{
ssize_t framelen;
size_t len_size = nghttp2_frame_get_len_size();
ssize_t nv_offset;
if(frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
nv_offset = NGHTTP2_FRAME_HEAD_LENGTH + 4;
} else {
nv_offset = NGHTTP2_FRAME_HEAD_LENGTH;
}
framelen = nghttp2_frame_alloc_pack_nv(buf_ptr, buflen_ptr,
nvbuf_ptr, nvbuflen_ptr,
frame->nv,
nv_offset,
len_size,
deflater);
if(framelen < 0) {
return framelen;
}
frame->hd.length = framelen - NGHTTP2_FRAME_HEAD_LENGTH;
memset(*buf_ptr, 0, nv_offset);
/* pack ctrl header after length is determined */
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
if(frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
nghttp2_put_uint32be(&(*buf_ptr)[8], frame->pri);
}
return framelen;
}
int nghttp2_frame_unpack_headers(nghttp2_headers *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
nghttp2_buffer *inflatebuf)
{
int r;
size_t len_size = nghttp2_frame_get_len_size();
r = nghttp2_frame_unpack_headers_without_nv(frame, head, headlen,
payload, payloadlen);
if(r == 0) {
r = nghttp2_frame_unpack_nv(&frame->nv, inflatebuf, len_size);
}
return r;
}
int nghttp2_frame_unpack_headers_without_nv(nghttp2_headers *frame,
const uint8_t *head,
size_t headlen,
const uint8_t *payload,
size_t payloadlen)
{
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
if(head[3] & NGHTTP2_FLAG_PRIORITY) {
if(payloadlen != 4) {
return NGHTTP2_ERR_INVALID_FRAME;
}
frame->pri = nghttp2_get_uint32(payload) & NGHTTP2_PRIORITY_MASK;
} else {
if(payloadlen != 0) {
return NGHTTP2_ERR_INVALID_FRAME;
}
frame->pri = NGHTTP2_PRI_DEFAULT;
}
frame->nv = NULL;
return 0;
}
ssize_t nghttp2_frame_pack_priority(uint8_t **buf_ptr, size_t *buflen_ptr,
nghttp2_priority *frame)
{
ssize_t framelen= NGHTTP2_FRAME_HEAD_LENGTH + 4;
int r;
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, framelen);
if(r != 0) {
return r;
}
memset(*buf_ptr, 0, framelen);
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
nghttp2_put_uint32be(&(*buf_ptr)[8], frame->pri);
return framelen;
}
int nghttp2_frame_unpack_priority(nghttp2_priority *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
if(payloadlen != 4) {
return NGHTTP2_ERR_INVALID_FRAME;
}
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
frame->pri = nghttp2_get_uint32(payload) & NGHTTP2_PRIORITY_MASK;
return 0;
}
ssize_t nghttp2_frame_pack_rst_stream(uint8_t **buf_ptr, size_t *buflen_ptr,
nghttp2_rst_stream *frame)
{
ssize_t framelen = NGHTTP2_FRAME_HEAD_LENGTH + 4;
int r;
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, framelen);
if(r != 0) {
return r;
}
memset(*buf_ptr, 0, framelen);
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
nghttp2_put_uint32be(&(*buf_ptr)[8], frame->error_code);
return framelen;
}
int nghttp2_frame_unpack_rst_stream(nghttp2_rst_stream *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
if(payloadlen != 4) {
return NGHTTP2_ERR_INVALID_FRAME;
}
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
frame->error_code = nghttp2_get_uint32(payload);
return 0;
}
ssize_t nghttp2_frame_pack_settings(uint8_t **buf_ptr, size_t *buflen_ptr,
nghttp2_settings *frame)
{
ssize_t framelen = NGHTTP2_FRAME_HEAD_LENGTH + frame->hd.length;
size_t i;
int r;
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, framelen);
if(r != 0) {
return r;
}
memset(*buf_ptr, 0, framelen);
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
for(i = 0; i < frame->niv; ++i) {
int off = i*8;
nghttp2_put_uint32be(&(*buf_ptr)[8+off], frame->iv[i].settings_id);
nghttp2_put_uint32be(&(*buf_ptr)[12+off], frame->iv[i].value);
}
return framelen;
}
int nghttp2_frame_unpack_settings(nghttp2_settings *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
size_t i;
if(payloadlen % 8) {
return NGHTTP2_ERR_INVALID_FRAME;
}
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
frame->niv = payloadlen / 8;
frame->iv = malloc(frame->niv*sizeof(nghttp2_settings_entry));
if(frame->iv == NULL) {
return NGHTTP2_ERR_NOMEM;
}
for(i = 0; i < frame->niv; ++i) {
size_t off = i*8;
frame->iv[i].settings_id = nghttp2_get_uint32(&payload[off]) &
NGHTTP2_SETTINGS_ID_MASK;
frame->iv[i].value = nghttp2_get_uint32(&payload[4+off]);
}
return 0;
}
ssize_t nghttp2_frame_pack_ping(uint8_t **buf_ptr, size_t *buflen_ptr,
nghttp2_ping *frame)
{
ssize_t framelen = NGHTTP2_FRAME_HEAD_LENGTH + 8;
int r;
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, framelen);
if(r != 0) {
return r;
}
memset(*buf_ptr, 0, framelen);
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
memcpy(&(*buf_ptr)[8], frame->opaque_data, sizeof(frame->opaque_data));
return framelen;
}
int nghttp2_frame_unpack_ping(nghttp2_ping *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
if(payloadlen != 8) {
return NGHTTP2_ERR_INVALID_FRAME;
}
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
memcpy(frame->opaque_data, payload, sizeof(frame->opaque_data));
return 0;
}
ssize_t nghttp2_frame_pack_goaway(uint8_t **buf_ptr, size_t *buflen_ptr,
nghttp2_goaway *frame)
{
ssize_t framelen = NGHTTP2_FRAME_HEAD_LENGTH + frame->hd.length;
int r;
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, framelen);
if(r != 0) {
return r;
}
memset(*buf_ptr, 0, framelen);
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
nghttp2_put_uint32be(&(*buf_ptr)[8], frame->last_stream_id);
nghttp2_put_uint32be(&(*buf_ptr)[12], frame->error_code);
memcpy(&(*buf_ptr)[16], frame->opaque_data, frame->opaque_data_len);
return framelen;
}
int nghttp2_frame_unpack_goaway(nghttp2_goaway *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen)
{
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
if(payloadlen < 8) {
return NGHTTP2_ERR_INVALID_FRAME;
}
frame->last_stream_id = nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
frame->error_code = nghttp2_get_uint32(payload+4);
frame->opaque_data_len = payloadlen - 8;
if(frame->opaque_data_len == 0) {
frame->opaque_data = NULL;
} else {
frame->opaque_data = malloc(frame->opaque_data_len);
if(frame->opaque_data == NULL) {
return NGHTTP2_ERR_NOMEM;
}
memcpy(frame->opaque_data, &payload[8], frame->opaque_data_len);
}
return 0;
}
ssize_t nghttp2_frame_pack_window_update(uint8_t **buf_ptr, size_t *buflen_ptr,
nghttp2_window_update *frame)
{
ssize_t framelen = NGHTTP2_FRAME_HEAD_LENGTH + 4;
int r;
r = nghttp2_reserve_buffer(buf_ptr, buflen_ptr, framelen);
if(r != 0) {
return r;
}
memset(*buf_ptr, 0, framelen);
nghttp2_frame_pack_frame_hd(*buf_ptr, &frame->hd);
nghttp2_put_uint32be(&(*buf_ptr)[8], frame->window_size_increment);
return framelen;
}
int nghttp2_frame_unpack_window_update(nghttp2_window_update *frame,
const uint8_t *head, size_t headlen,
const uint8_t *payload,
size_t payloadlen)
{
if(payloadlen != 4) {
return NGHTTP2_ERR_INVALID_FRAME;
}
nghttp2_frame_unpack_frame_hd(&frame->hd, head);
frame->window_size_increment = nghttp2_get_uint32(payload) &
NGHTTP2_WINDOW_SIZE_INCREMENT_MASK;
return 0;
}
nghttp2_settings_entry* nghttp2_frame_iv_copy(const nghttp2_settings_entry *iv,
size_t niv)
{
nghttp2_settings_entry *iv_copy;
size_t len = niv*sizeof(nghttp2_settings_entry);
iv_copy = malloc(len);
if(iv_copy == NULL) {
return NULL;
}
memcpy(iv_copy, iv, len);
return iv_copy;
}
static int nghttp2_settings_entry_compar(const void *lhs, const void *rhs)
{
return ((nghttp2_settings_entry *)lhs)->settings_id
-((nghttp2_settings_entry *)rhs)->settings_id;
}
void nghttp2_frame_iv_sort(nghttp2_settings_entry *iv, size_t niv)
{
qsort(iv, niv, sizeof(nghttp2_settings_entry), nghttp2_settings_entry_compar);
}
ssize_t nghttp2_frame_nv_offset(const uint8_t *head)
{
switch(head[2]) {
case NGHTTP2_HEADERS:
if(head[3] & NGHTTP2_FLAG_PRIORITY) {
return NGHTTP2_FRAME_HEAD_LENGTH + 4;
} else {
return NGHTTP2_FRAME_HEAD_LENGTH;
}
case NGHTTP2_PUSH_PROMISE:
return NGHTTP2_FRAME_HEAD_LENGTH + 4;
default:
return -1;
}
}
int nghttp2_frame_nv_check_null(const char **nv)
{
size_t i, j;
for(i = 0; nv[i]; i += 2) {
if(nv[i][0] == '\0' || nv[i+1] == NULL) {
return 0;
}
for(j = 0; nv[i][j]; ++j) {
unsigned char c = nv[i][j];
if(c < 0x20 || c > 0x7e) {
return 0;
}
}
}
return 1;
}
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