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SETTINGS ID is little endian in wire format despite the fact that spec/2 says it is network byte order.

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This commit is contained in:
Tatsuhiro Tsujikawa 2012-02-01 01:13:17 +09:00
parent f429cc45cb
commit 24eb3a3b36
1 changed files with 20 additions and 2 deletions
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22
lib/spdylay_frame.c
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@ -690,7 +690,16 @@ ssize_t spdylay_frame_pack_settings(uint8_t **buf_ptr, spdylay_settings *frame)
spdylay_put_uint32be(&framebuf[8], frame->niv); spdylay_put_uint32be(&framebuf[8], frame->niv);
for(i = 0; i < frame->niv; ++i) { for(i = 0; i < frame->niv; ++i) {
int off = i*8; int off = i*8;
spdylay_put_uint32be(&framebuf[12+off], frame->iv[i].settings_id << 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; framebuf[15+off] = frame->iv[i].flags;
spdylay_put_uint32be(&framebuf[16+off], frame->iv[i].value); spdylay_put_uint32be(&framebuf[16+off], frame->iv[i].value);
} }
@ -717,7 +726,16 @@ int spdylay_frame_unpack_settings(spdylay_settings *frame,
} }
for(i = 0; i < frame->niv; ++i) { for(i = 0; i < frame->niv; ++i) {
int off = i*8; int off = i*8;
frame->iv[i].settings_id = (spdylay_get_uint32(&payload[4+off]) >> 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].flags = payload[7+off];
frame->iv[i].value = spdylay_get_uint32(&payload[8+off]); frame->iv[i].value = spdylay_get_uint32(&payload[8+off]);
} }