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MINOR: htx: Add function to add an HTX block just before another one

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The function htx_add_data_before() can be used to add an HTX block before
another one. For instance, it could be used to add some data before the
end-of-message marker.
This commit is contained in:
Christopher Faulet 2018-11-22 11:20:43 +01:00 committed by Willy Tarreau
parent 9400a3924d
commit 24ed835129
2 changed files with 32 additions and 0 deletions
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1
include/proto/htx.h
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@ -57,6 +57,7 @@ struct htx_blk *htx_add_endof(struct htx *htx, enum htx_blk_type type);
struct htx_blk *htx_add_data(struct htx *htx, const struct ist data);
struct htx_blk *htx_add_trailer(struct htx *htx, const struct ist tlr);
struct htx_blk *htx_add_oob(struct htx *htx, const struct ist oob);
struct htx_blk *htx_add_data_before(struct htx *htx, const struct htx_blk *ref, const struct ist data);
int htx_reqline_to_str(const union htx_sl *sl, struct buffer *chk);
int htx_stline_to_str(const union htx_sl *sl, struct buffer *chk);

31
src/htx.c
View File

@ -788,6 +788,37 @@ struct htx_blk *htx_add_oob(struct htx *htx, const struct ist oob)
return blk;
}
struct htx_blk *htx_add_data_before(struct htx *htx, const struct htx_blk *ref,
const struct ist data)
{
struct htx_blk *blk;
int32_t prev;
/* FIXME: check data.len (< 256MB) */
blk = htx_add_blk(htx, HTX_BLK_DATA, data.len);
if (!blk)
return NULL;
blk->info += data.len;
memcpy(htx_get_blk_ptr(htx, blk), data.ptr, data.len);
for (prev = htx_get_prev(htx, htx->tail); prev != -1; prev = htx_get_prev(htx, prev)) {
struct htx_blk *pblk = htx_get_blk(htx, prev);
/* Swap .addr and .info fields */
blk->addr ^= pblk->addr; pblk->addr ^= blk->addr; blk->addr ^= pblk->addr;
blk->info ^= pblk->info; pblk->info ^= blk->info; blk->info ^= pblk->info;
if (blk->addr == pblk->addr)
blk->addr += htx_get_blksz(pblk);
htx->front = prev;
if (pblk == ref)
break;
blk = pblk;
}
return blk;
}
/* Appends the string representation of the request line block <blk> to the
* chunk <chk>. It returns 1 if data are successfully appended, otherwise it