| /* |
| * internal HTTP message |
| * |
| * Copyright 2018 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| */ |
| |
| #include <common/chunk.h> |
| #include <proto/htx.h> |
| |
| struct htx htx_empty = { .size = 0, .data = 0, .used = 0 }; |
| |
| /* Defragments an HTTP message, removing unused blocks and unwrapping blocks and |
| * their contents. A temporary message is used to do so. This function never |
| * fails. if <blk> is not NULL, we replace it by the new block address, after |
| * the defragmentation. The new <blk> is returned. |
| */ |
| /* TODO: merge data blocks into one */ |
| struct htx_blk *htx_defrag(struct htx *htx, struct htx_blk *blk) |
| { |
| struct buffer *chunk = get_trash_chunk(); |
| struct htx *tmp = htx_from_buf(chunk); |
| struct htx_blk *newblk, *oldblk; |
| uint32_t new, old; |
| uint32_t addr, blksz; |
| |
| if (!htx->used) |
| return NULL; |
| |
| new = 0; |
| addr = 0; |
| tmp->size = htx->size; |
| |
| /* start from the head */ |
| for (old = htx_get_head(htx); old != -1; old = htx_get_next(htx, old)) { |
| oldblk = htx_get_blk(htx, old); |
| if (htx_get_blk_type(oldblk) == HTX_BLK_UNUSED) { |
| htx->used--; |
| continue; |
| } |
| |
| newblk = htx_get_blk(tmp, new); |
| newblk->addr = addr; |
| newblk->info = oldblk->info; |
| blksz = htx_get_blksz(oldblk); |
| |
| memcpy((void *)tmp->blocks + addr, htx_get_blk_ptr(htx, oldblk), blksz); |
| new++; |
| addr += blksz; |
| |
| /* update the start-line offset */ |
| if (htx->sl_off == oldblk->addr) |
| htx->sl_off = addr; |
| |
| /* if <blk> is defined, set its new location */ |
| if (blk != NULL && blk == oldblk) |
| blk = newblk; |
| } while (new < htx->used); |
| |
| htx->wrap = htx->used; |
| htx->front = htx->tail = new - 1; |
| memcpy((void *)htx->blocks, (void *)tmp->blocks, htx->size); |
| |
| return blk; |
| } |
| |
| /* Reserves a new block in the HTTP message <htx> with a content of <blksz> |
| * bytes. If there is not enough space, NULL is returned. Otherwise the reserved |
| * block is returned and the HTTP message is updated. Space for this new block |
| * is reserved in the HTTP message. But it is the caller responsibility to set |
| * right info in the block to reflect the stored data. |
| */ |
| static struct htx_blk *htx_reserve_nxblk(struct htx *htx, uint32_t blksz) |
| { |
| struct htx_blk *blk, *prevblk, *headblk, *frtblk; |
| uint32_t used; |
| uint32_t tail; |
| uint32_t prev; |
| uint32_t wrap; |
| uint32_t head; |
| int32_t headroom, tailroom; |
| |
| if (blksz > htx_free_data_space(htx)) |
| return NULL; /* full */ |
| |
| if (!htx->used) { |
| /* Empty message */ |
| htx->front = htx->tail = 0; |
| htx->wrap = htx->used = 1; |
| blk = htx_get_blk(htx, htx->tail); |
| blk->addr = 0; |
| htx->data = blksz; |
| return blk; |
| } |
| |
| used = htx->used + 1; |
| tail = htx->tail + 1; |
| prev = htx->tail; |
| wrap = htx->wrap; |
| head = htx_get_head(htx); |
| |
| if (tail == wrap) { |
| frtblk = htx_get_blk(htx, htx->front); |
| |
| /* Blocks don't wrap for now. We either need to push the new one |
| * on top of others or to defragement the table. */ |
| if (sizeof(htx->blocks[0]) * htx_pos_to_idx(htx, wrap+1) >= frtblk->addr + htx_get_blksz(frtblk)) |
| wrap++; |
| else if (tail >= used) /* There is hole at the beginning */ |
| tail = 0; |
| else { |
| /* No more room, tail hits data. We have to realign the |
| * whole message. */ |
| goto defrag; |
| } |
| } |
| else if (used >= wrap) { |
| /* We have hit the tail, we need to reorganize the blocks. */ |
| goto defrag; |
| } |
| |
| /* Now we have updated tail, used and wrap, we know that there is some |
| * available room at least from the protocol's perspective. This space |
| * is split in two areas : |
| * |
| * 1: the space between the beginning of the blocks table and the |
| * front data's address. This space will only be used if data don't |
| * wrap yet. |
| |
| * 2: If the previous tail was the front block, the space between the |
| * beginning of the message and the head data's address. |
| * Otherwise, the space between the tail data's address and the |
| * tail's one. |
| */ |
| prevblk = htx_get_blk(htx, prev); |
| headblk = htx_get_blk(htx, head); |
| if (prevblk->addr >= headblk->addr) { |
| /* the area was contiguous */ |
| frtblk = htx_get_blk(htx, htx->front); |
| tailroom = sizeof(htx->blocks[0]) * htx_pos_to_idx(htx, wrap) - (frtblk->addr + htx_get_blksz(frtblk)); |
| headroom = headblk->addr; |
| |
| if (tailroom >= (int32_t)blksz) { |
| /* install upfront and update ->front */ |
| blk = htx_get_blk(htx, tail); |
| blk->addr = frtblk->addr + htx_get_blksz(frtblk); |
| htx->front = tail; |
| } |
| else if (headroom >= (int32_t)blksz) { |
| blk = htx_get_blk(htx, tail); |
| blk->addr = 0; |
| } |
| else { |
| /* need to defragment the table before inserting upfront */ |
| goto defrag; |
| } |
| } |
| else { |
| /* it's already wrapped so we can't store anything in the tailroom */ |
| headroom = headblk->addr - (prevblk->addr + htx_get_blksz(prevblk)); |
| |
| if (headroom >= (int32_t)blksz) { |
| blk = htx_get_blk(htx, tail); |
| blk->addr = prevblk->addr + htx_get_blksz(prevblk); |
| } |
| else { |
| defrag: |
| /* need to defragment the table before inserting upfront */ |
| htx_defrag(htx, NULL); |
| frtblk = htx_get_blk(htx, htx->front); |
| wrap = htx->wrap + 1; |
| tail = htx->tail + 1; |
| used = htx->used + 1; |
| blk = htx_get_blk(htx, tail); |
| blk->addr = frtblk->addr + htx_get_blksz(frtblk); |
| htx->front = tail; |
| } |
| } |
| |
| htx->wrap = wrap; |
| htx->tail = tail; |
| htx->used = used; |
| htx->data += blksz; |
| return blk; |
| } |
| |
| /* Adds a new block of type <type> in the HTTP message <htx>. Its content size |
| * is passed but it is the caller responsibility to do the copy. |
| */ |
| struct htx_blk *htx_add_blk(struct htx *htx, enum htx_blk_type type, uint32_t blksz) |
| { |
| struct htx_blk *blk; |
| |
| blk = htx_reserve_nxblk(htx, blksz); |
| if (!blk) |
| return NULL; |
| |
| blk->info = (type << 28); |
| return blk; |
| } |
| |
| /* Removes the block <blk> from the HTTP message <htx>. The function returns the |
| * block following <blk> or NULL if <blk> is the last block or the last |
| * inserted one. |
| */ |
| struct htx_blk *htx_remove_blk(struct htx *htx, struct htx_blk *blk) |
| { |
| enum htx_blk_type type = htx_get_blk_type(blk); |
| uint32_t next, head, pos; |
| |
| if (type != HTX_BLK_UNUSED) { |
| /* Mark the block as unused, decrement allocated size */ |
| htx->data -= htx_get_blksz(blk); |
| blk->info = ((uint32_t)HTX_BLK_UNUSED << 28); |
| if (htx->sl_off == blk->addr) |
| htx->sl_off = -1; |
| } |
| |
| /* This is the last block in use */ |
| if (htx->used == 1/* || !htx->data */) { |
| htx->front = htx->tail = 0; |
| htx->wrap = htx->used = 0; |
| htx->data = 0; |
| return NULL; |
| } |
| |
| /* There is at least 2 blocks, so tail is always >= 0 */ |
| pos = htx_get_blk_pos(htx, blk); |
| head = htx_get_head(htx); |
| blk = NULL; |
| next = pos + 1; /* By default retrun the next block */ |
| if (htx->tail + 1 == htx->wrap) { |
| /* The HTTP message doesn't wrap */ |
| if (pos == head) { |
| /* remove the head, so just return the new head */ |
| htx->used--; |
| next = htx_get_head(htx); |
| } |
| else if (pos == htx->tail) { |
| /* remove the tail. this was the last inserted block so |
| * return NULL. */ |
| htx->wrap--; |
| htx->tail--; |
| htx->used--; |
| goto end; |
| } |
| } |
| else { |
| /* The HTTP message wraps */ |
| if (pos == htx->tail) { |
| /* remove the tail. try to unwrap the message (pos == 0) |
| * and return NULL. */ |
| htx->tail = ((pos == 0) ? htx->wrap-1 : htx->tail-1); |
| htx->used--; |
| goto end; |
| } |
| else if (pos == head) { |
| /* remove the head, try to unwrap the message (pos+1 == |
| * wrap) and return the new head */ |
| htx->used--; |
| if (pos + 1 == htx->wrap) |
| htx->wrap = htx->tail + 1; |
| next = htx_get_head(htx); |
| } |
| } |
| |
| blk = htx_get_blk(htx, next); |
| if (htx->sl_off == -1) { |
| /* Try to update the start-line offset, if possible */ |
| type = htx_get_blk_type(blk); |
| if (type == HTX_BLK_REQ_SL || type == HTX_BLK_RES_SL) |
| htx->sl_off = blk->addr; |
| } |
| end: |
| if (pos == htx->front) |
| htx->front = htx_find_front(htx); |
| return blk; |
| } |
| |
| /* Tries to append data to the last inserted block, if the type matches and if |
| * there is enough non-wrapping space. Only DATA and TRAILERS content can be |
| * appended. If the append fails, a new block is inserted. If an error occurred, |
| * NULL is returned. Otherwise, on success, the updated block (or the new one) |
| * is returned. |
| */ |
| static struct htx_blk *htx_append_blk_value(struct htx *htx, enum htx_blk_type type, |
| const struct ist data) |
| { |
| struct htx_blk *blk; |
| struct ist v; |
| |
| if (!htx->used) |
| goto add_new_block; |
| |
| /* Not enough space to store data */ |
| if (data.len > htx_free_data_space(htx)) |
| return NULL; |
| |
| /* Append only DATA et TRAILERS data */ |
| if (type != HTX_BLK_DATA && type != HTX_BLK_TLR) |
| goto add_new_block; |
| |
| /* get the tail block */ |
| blk = htx_get_blk(htx, htx->tail); |
| |
| /* Don't try to append data if the last inserted block is not of the |
| * same type */ |
| if (type != htx_get_blk_type(blk)) |
| goto add_new_block; |
| |
| /* |
| * Same type and enough space: append data |
| */ |
| if (htx->tail + 1 == htx->wrap) { |
| struct htx_blk *frtblk = htx_get_blk(htx, htx->front); |
| int32_t tailroom = sizeof(htx->blocks[0]) * htx_pos_to_idx(htx, htx->tail) - (frtblk->addr + htx_get_blksz(frtblk)); |
| if (tailroom >= (int32_t)data.len) |
| goto append_data; |
| htx_defrag(htx, NULL); |
| blk = htx_get_blk(htx, htx->tail); |
| } |
| else { |
| struct htx_blk *headblk = htx_get_blk(htx, htx_get_head(htx)); |
| int32_t headroom = headblk->addr - (blk->addr + htx_get_blksz(blk)); |
| if (headroom >= (int32_t)data.len) |
| goto append_data; |
| htx_defrag(htx, NULL); |
| blk = htx_get_blk(htx, htx->tail); |
| } |
| |
| append_data: |
| /* get the value of the tail block */ |
| /* FIXME: check v.len + data.len < 256MB */ |
| v = htx_get_blk_value(htx, blk); |
| |
| /* Append data and update the block itself */ |
| memcpy(v.ptr + v.len, data.ptr, data.len); |
| htx_set_blk_value_len(blk, v.len + data.len); |
| |
| /* Update HTTP message */ |
| htx->data += data.len; |
| |
| return blk; |
| |
| add_new_block: |
| /* FIXME: check tlr.len (< 256MB) */ |
| blk = htx_add_blk(htx, type, data.len); |
| if (!blk) |
| return NULL; |
| |
| blk->info += data.len; |
| memcpy(htx_get_blk_ptr(htx, blk), data.ptr, data.len); |
| return blk; |
| } |
| |
| /* Replaces a value part of a block by a new one. The new part can be smaller or |
| * larger than the old one. This function works for any kind of block with |
| * attached data. It returns the new block on success, otherwise it returns |
| * NULL. |
| */ |
| struct htx_blk *htx_replace_blk_value(struct htx *htx, struct htx_blk *blk, |
| const struct ist old, const struct ist new) |
| { |
| struct htx_blk *frtblk; |
| struct buffer *tmp; |
| struct ist n, v; |
| uint32_t info, room; |
| |
| n = htx_get_blk_name(htx, blk); |
| v = htx_get_blk_value(htx, blk); |
| |
| /* easy case, new data are smaller, so replace it in-place */ |
| if (new.len <= old.len) { |
| memcpy(old.ptr, new.ptr, new.len); |
| if (old.len != v.len) |
| memmove(old.ptr + new.len, old.ptr + old.len, (v.ptr + v.len) - (old.ptr + old.len)); |
| htx_set_blk_value_len(blk, v.len - old.len + new.len); |
| htx->data -= (old.len - new.len); |
| return blk; |
| } |
| |
| /* we need to allocate more space to store the new header value */ |
| if ((new.len - old.len) > htx_free_space(htx)) |
| return NULL; /* not enough space */ |
| |
| /* |
| * Copy the new header in a temp buffer |
| */ |
| tmp = get_trash_chunk(); |
| |
| /* 1. copy the header name */ |
| chunk_memcat(tmp, n.ptr, n.len); |
| |
| /* 2. copy value before old part, if any */ |
| if (old.ptr != v.ptr) |
| chunk_memcat(tmp, v.ptr, old.ptr - v.ptr); |
| |
| /* 3. copy new value */ |
| chunk_memcat(tmp, new.ptr, new.len); |
| |
| /* 4. copy value after old part if any */ |
| if (old.len != v.len) |
| chunk_memcat(tmp, old.ptr + old.len, (v.ptr + v.len) - (old.ptr + old.len)); |
| |
| /* |
| * temporarely remove space reserved for the header |
| */ |
| info = blk->info; |
| blk->info &= 0xf0000000; |
| htx->data -= (n.len + v.len); |
| |
| /* |
| * Try to find right addr to copy all the data |
| */ |
| if (htx->tail + 1 == htx->wrap) { |
| frtblk = htx_get_blk(htx, htx->front); |
| room = sizeof(htx->blocks[0]) * htx_pos_to_idx(htx, htx->tail) - (frtblk->addr + htx_get_blksz(frtblk)); |
| if (room >= htx->data) { |
| blk->addr = frtblk->addr + htx_get_blksz(frtblk); |
| goto replace_value; |
| } |
| } |
| |
| /* HTX message need to be defragmented first */ |
| blk = htx_defrag(htx, blk); |
| frtblk = htx_get_blk(htx, htx->front); |
| blk->addr = frtblk->addr + htx_get_blksz(frtblk); |
| |
| replace_value: |
| blk->info = info; |
| htx_set_blk_value_len(blk, v.len - old.len + new.len); |
| memcpy(htx_get_blk_ptr(htx, blk), tmp->area, tmp->data); |
| htx->data += tmp->data; |
| htx->front = htx_get_blk_pos(htx, blk); |
| |
| return blk; |
| } |
| |
| /* Transfer HTX blocks from <src> to <dst>, stopping on the first block of the |
| * type <mark> (typically EOH, EOD or EOM) or when <count> bytes of data were |
| * moved. It returns the number of bytes of data moved and the last HTX block |
| * inserted in <dst>. |
| */ |
| struct htx_ret htx_xfer_blks(struct htx *dst, struct htx *src, uint32_t count, |
| enum htx_blk_type mark) |
| { |
| struct htx_blk *blk, *dstblk; |
| enum htx_blk_type type; |
| uint32_t info, max, sz, ret; |
| |
| ret = 0; |
| blk = htx_get_blk(src, htx_get_head(src)); |
| dstblk = NULL; |
| while (blk && ret <= count) { |
| type = htx_get_blk_type(blk); |
| |
| /* Ingore unused block */ |
| if (type == HTX_BLK_UNUSED) |
| goto next; |
| |
| sz = htx_get_blksz(blk); |
| if (!sz) { |
| dstblk = htx_reserve_nxblk(dst, 0); |
| if (!dstblk) |
| break; |
| dstblk->info = blk->info; |
| goto next; |
| } |
| |
| info = blk->info; |
| max = htx_free_data_space(dst); |
| if (max > count) |
| max = count; |
| if (sz > max) { |
| sz = max; |
| info = (type << 28) + sz; |
| /* Headers and pseudo headers must be fully copied */ |
| if (type < HTX_BLK_DATA || !sz) |
| break; |
| } |
| |
| dstblk = htx_reserve_nxblk(dst, sz); |
| if (!dstblk) |
| break; |
| dstblk->info = info; |
| memcpy(htx_get_blk_ptr(dst, dstblk), htx_get_blk_ptr(src, blk), sz); |
| |
| ret += sz; |
| if (blk->info != info) { |
| /* Partial move: don't remove <blk> from <src> but |
| * resize its content */ |
| blk->addr += sz; |
| htx_set_blk_value_len(blk, htx_get_blksz(blk) - sz); |
| src->data -= sz; |
| break; |
| } |
| |
| if (dst->sl_off == -1 && src->sl_off == blk->addr) |
| dst->sl_off = dstblk->addr; |
| next: |
| blk = htx_remove_blk(src, blk); |
| if (type == mark) |
| break; |
| |
| } |
| |
| return (struct htx_ret){.ret = ret, .blk = dstblk}; |
| } |
| |
| static struct htx_blk *htx_new_blk_value(struct htx *htx, struct htx_blk *blk, |
| uint32_t newsz) |
| { |
| struct htx_blk *frtblk; |
| uint32_t sz, room; |
| int32_t delta; |
| |
| sz = htx_get_blksz(blk); |
| delta = newsz - sz; |
| |
| /* easy case, new value is smaller, so replace it in-place */ |
| if (delta <= 0) { |
| /* Reset value size. It is the caller responsibility to set the new one */ |
| blk->info &= 0xf0000000; |
| htx->data += delta; |
| return blk; |
| } |
| |
| /* we need to allocate more space to store the new value */ |
| if (delta > htx_free_space(htx)) |
| return NULL; /* not enough space */ |
| |
| /* |
| * temporarely remove space reserved for the old value |
| */ |
| /* Reset value size. It is the caller responsibility to set the new one */ |
| blk->info &= 0xf0000000; |
| htx->data -= sz; |
| |
| /* |
| * Try to find right addr to copy all the data |
| */ |
| if (htx->tail + 1 == htx->wrap) { |
| frtblk = htx_get_blk(htx, htx->front); |
| room = sizeof(htx->blocks[0]) * htx_pos_to_idx(htx, htx->tail) - (frtblk->addr + htx_get_blksz(frtblk)); |
| if (room >= newsz) |
| goto replace_value; |
| } |
| |
| /* HTX message need to be defragmented first */ |
| blk = htx_defrag(htx, blk); |
| frtblk = htx_get_blk(htx, htx->front); |
| |
| replace_value: |
| blk->addr = frtblk->addr + htx_get_blksz(frtblk); |
| htx->data += newsz; |
| htx->front = htx_get_blk_pos(htx, blk); |
| |
| return blk; |
| } |
| |
| /* Replaces an header by a new one. The new header can be smaller or larger than |
| * the old one. It returns the new block on success, otherwise it returns NULL. |
| */ |
| struct htx_blk *htx_replace_header(struct htx *htx, struct htx_blk *blk, |
| const struct ist name, const struct ist value) |
| { |
| enum htx_blk_type type; |
| |
| type = htx_get_blk_type(blk); |
| if (type != HTX_BLK_HDR) |
| return NULL; |
| |
| blk = htx_new_blk_value(htx, blk, (name.len + value.len)); |
| if (!blk) |
| return NULL; |
| |
| blk->info = (type << 28) + (value.len << 8) + name.len; |
| memcpy(htx_get_blk_ptr(htx, blk), name.ptr, name.len); |
| memcpy(htx_get_blk_ptr(htx, blk) + name.len, value.ptr, value.len); |
| |
| return blk; |
| } |
| |
| /* Replaces the parts of the start-line. It returns the new start-line on |
| * success, otherwise it returns NULL. It is the caller responsibility to update |
| * sl->info, if necessary. |
| */ |
| struct htx_sl *htx_replace_stline(struct htx *htx, struct htx_blk *blk, const struct ist p1, |
| const struct ist p2, const struct ist p3) |
| { |
| struct htx_sl *sl; |
| struct htx_sl tmp; /* used to save sl->info and sl->flags */ |
| enum htx_blk_type type; |
| uint32_t size; |
| |
| type = htx_get_blk_type(blk); |
| if (type != HTX_BLK_REQ_SL || HTX_BLK_RES_SL) |
| return NULL; |
| |
| /* Save start-line info and flags */ |
| sl = htx_get_blk_ptr(htx, blk); |
| tmp.info = sl->info; |
| tmp.flags = sl->flags; |
| if (htx->sl_off == blk->addr) |
| htx->sl_off = -1; |
| |
| |
| size = sizeof(*sl) + p1.len + p2.len + p3.len; |
| blk = htx_new_blk_value(htx, blk, size); |
| if (!blk) |
| return NULL; |
| blk->info = (type << 28) + size; |
| |
| /* Restore start-line info and flags*/ |
| sl = htx_get_blk_ptr(htx, blk); |
| sl->info = tmp.info; |
| sl->flags = tmp.flags; |
| if (htx->sl_off == -1) |
| htx->sl_off = blk->addr; |
| |
| HTX_SL_P1_LEN(sl) = p1.len; |
| HTX_SL_P2_LEN(sl) = p2.len; |
| HTX_SL_P3_LEN(sl) = p3.len; |
| |
| memcpy(HTX_SL_P1_PTR(sl), p1.ptr, p1.len); |
| memcpy(HTX_SL_P2_PTR(sl), p2.ptr, p2.len); |
| memcpy(HTX_SL_P3_PTR(sl), p3.ptr, p3.len); |
| |
| return sl; |
| } |
| |
| /* Add a new start-line. It returns it on success, otherwise it returns NULL. It |
| * is the caller responsibility to set sl->info, if necessary. |
| */ |
| struct htx_sl *htx_add_stline(struct htx *htx, enum htx_blk_type type, unsigned int flags, |
| const struct ist p1, const struct ist p2, const struct ist p3) |
| { |
| struct htx_blk *blk; |
| struct htx_sl *sl; |
| uint32_t size; |
| |
| if (type != HTX_BLK_REQ_SL && type != HTX_BLK_RES_SL) |
| return NULL; |
| |
| size = sizeof(*sl) + p1.len + p2.len + p3.len; |
| |
| /* FIXME: check size (< 256MB) */ |
| blk = htx_add_blk(htx, type, size); |
| if (!blk) |
| return NULL; |
| blk->info += size; |
| |
| sl = htx_get_blk_ptr(htx, blk); |
| if (htx->sl_off == -1) |
| htx->sl_off = blk->addr; |
| |
| sl->flags = flags; |
| |
| HTX_SL_P1_LEN(sl) = p1.len; |
| HTX_SL_P2_LEN(sl) = p2.len; |
| HTX_SL_P3_LEN(sl) = p3.len; |
| |
| memcpy(HTX_SL_P1_PTR(sl), p1.ptr, p1.len); |
| memcpy(HTX_SL_P2_PTR(sl), p2.ptr, p2.len); |
| memcpy(HTX_SL_P3_PTR(sl), p3.ptr, p3.len); |
| |
| return sl; |
| } |
| |
| /* Adds an HTX block of type HDR in <htx>. It returns the new block on |
| * success. Otherwise, it returns NULL. |
| */ |
| struct htx_blk *htx_add_header(struct htx *htx, const struct ist name, |
| const struct ist value) |
| { |
| struct htx_blk *blk; |
| |
| /* FIXME: check name.len (< 256B) and value.len (< 1MB) */ |
| blk = htx_add_blk(htx, HTX_BLK_HDR, name.len + value.len); |
| if (!blk) |
| return NULL; |
| |
| blk->info += (value.len << 8) + name.len; |
| memcpy(htx_get_blk_ptr(htx, blk), name.ptr, name.len); |
| memcpy(htx_get_blk_ptr(htx, blk) + name.len, value.ptr, value.len); |
| return blk; |
| } |
| |
| struct htx_blk *htx_add_all_headers(struct htx *htx, const struct http_hdr *hdrs) |
| { |
| int i; |
| |
| for (i = 0; hdrs[i].n.len; i++) { |
| if (!htx_add_header(htx, hdrs[i].n, hdrs[i].v)) |
| return NULL; |
| } |
| return htx_add_endof(htx, HTX_BLK_EOH); |
| } |
| /* Adds an HTX block of type PHDR in <htx>. It returns the new block on |
| * success. Otherwise, it returns NULL. |
| */ |
| struct htx_blk *htx_add_pseudo_header(struct htx *htx, enum htx_phdr_type phdr, |
| const struct ist value) |
| { |
| struct htx_blk *blk; |
| |
| /* FIXME: check value.len ( < 1MB) */ |
| blk = htx_add_blk(htx, HTX_BLK_PHDR, value.len); |
| if (!blk) |
| return NULL; |
| |
| blk->info += (value.len << 8) + phdr; |
| memcpy(htx_get_blk_ptr(htx, blk), value.ptr, value.len); |
| return blk; |
| } |
| |
| /* Adds an HTX block of type EOH,EOD or EOM in <htx>. It returns the new block |
| * on success. Otherwise, it returns NULL. |
| */ |
| struct htx_blk *htx_add_endof(struct htx *htx, enum htx_blk_type type) |
| { |
| struct htx_blk *blk; |
| |
| blk = htx_add_blk(htx, type, 1); |
| if (!blk) |
| return NULL; |
| |
| blk->info += 1; |
| return blk; |
| } |
| |
| |
| /* Adds an HTX block of type DATA in <htx>. It first tries to append data if |
| * possible. It returns the new block on success. Otherwise, it returns NULL. |
| */ |
| struct htx_blk *htx_add_data(struct htx *htx, const struct ist data) |
| { |
| return htx_append_blk_value(htx, HTX_BLK_DATA, data); |
| } |
| |
| /* Adds an HTX block of type TLR in <htx>. It first tries to append trailers |
| * data if possible. It returns the new block on success. Otherwise, it returns |
| * NULL. |
| */ |
| struct htx_blk *htx_add_trailer(struct htx *htx, const struct ist tlr) |
| { |
| return htx_append_blk_value(htx, HTX_BLK_TLR, tlr); |
| } |
| |
| /* Adds an HTX block of type OOB in <htx>. It returns the new block on |
| * success. Otherwise, it returns NULL. |
| */ |
| struct htx_blk *htx_add_oob(struct htx *htx, const struct ist oob) |
| { |
| struct htx_blk *blk; |
| |
| /* FIXME: check oob.len (< 256MB) */ |
| blk = htx_add_blk(htx, HTX_BLK_OOB, oob.len); |
| if (!blk) |
| return NULL; |
| |
| blk->info += oob.len; |
| memcpy(htx_get_blk_ptr(htx, blk), oob.ptr, oob.len); |
| 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 H1 representation of the request line block <blk> to the |
| * chunk <chk>. It returns 1 if data are successfully appended, otherwise it |
| * returns 0. |
| */ |
| int htx_reqline_to_h1(const struct htx_sl *sl, struct buffer *chk) |
| { |
| if (HTX_SL_LEN(sl) + 4 > b_room(chk)) |
| return 0; |
| |
| chunk_memcat(chk, HTX_SL_REQ_MPTR(sl), HTX_SL_REQ_MLEN(sl)); |
| chunk_memcat(chk, " ", 1); |
| chunk_memcat(chk, HTX_SL_REQ_UPTR(sl), HTX_SL_REQ_ULEN(sl)); |
| chunk_memcat(chk, " ", 1); |
| if (sl->flags & HTX_SL_F_VER_11) |
| chunk_memcat(chk, "HTTP/1.1", 8); |
| else |
| chunk_memcat(chk, HTX_SL_REQ_VPTR(sl), HTX_SL_REQ_VLEN(sl)); |
| |
| chunk_memcat(chk, "\r\n", 2); |
| |
| return 1; |
| } |
| |
| /* Appends the H1 representation of the status line block <blk> to the chunk |
| * <chk>. It returns 1 if data are successfully appended, otherwise it |
| * returns 0. |
| */ |
| int htx_stline_to_h1(const struct htx_sl *sl, struct buffer *chk) |
| { |
| if (HTX_SL_LEN(sl) + 4 > b_size(chk)) |
| return 0; |
| |
| if (sl->flags & HTX_SL_F_VER_11) |
| chunk_memcat(chk, "HTTP/1.1", 8); |
| else |
| chunk_memcat(chk, HTX_SL_RES_VPTR(sl), HTX_SL_RES_VLEN(sl)); |
| chunk_memcat(chk, " ", 1); |
| chunk_memcat(chk, HTX_SL_RES_CPTR(sl), HTX_SL_RES_CLEN(sl)); |
| chunk_memcat(chk, " ", 1); |
| chunk_memcat(chk, HTX_SL_RES_RPTR(sl), HTX_SL_RES_RLEN(sl)); |
| chunk_memcat(chk, "\r\n", 2); |
| |
| return 1; |
| } |
| |
| /* Appends the H1 representation of the header block <blk> to the chunk |
| * <chk>. It returns 1 if data are successfully appended, otherwise it returns |
| * 0. |
| */ |
| int htx_hdr_to_h1(const struct ist n, const struct ist v, struct buffer *chk) |
| { |
| if (n.len + v.len + 4 > b_room(chk)) |
| return 0; |
| |
| chunk_memcat(chk, n.ptr, n.len); |
| chunk_memcat(chk, ": ", 2); |
| chunk_memcat(chk, v.ptr, v.len); |
| chunk_memcat(chk, "\r\n", 2); |
| |
| return 1; |
| } |
| |
| /* Appends the H1 representation of the data block <blk> to the chunk |
| * <chk>. If <chunked> is non-zero, it emits HTTP/1 chunk-encoded data. It |
| * returns 1 if data are successfully appended, otherwise it returns 0. |
| */ |
| int htx_data_to_h1(const struct ist data, struct buffer *chk, int chunked) |
| { |
| if (chunked) { |
| uint32_t chksz; |
| char tmp[10]; |
| char *beg, *end; |
| |
| chksz = data.len; |
| |
| beg = end = tmp+10; |
| *--beg = '\n'; |
| *--beg = '\r'; |
| do { |
| *--beg = hextab[chksz & 0xF]; |
| } while (chksz >>= 4); |
| |
| if (data.len + (end - beg) + 2 > b_room(chk)) |
| return 0; |
| chunk_memcat(chk, beg, end - beg); |
| chunk_memcat(chk, data.ptr, data.len); |
| chunk_memcat(chk, "\r\n", 2); |
| } |
| else { |
| if (!chunk_memcat(chk, data.ptr, data.len)) |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /* Appends the h1 representation of the trailer block <blk> to the chunk |
| * <chk>. It returns 1 if data are successfully appended, otherwise it returns |
| * 0. |
| */ |
| int htx_trailer_to_h1(const struct ist tlr, struct buffer *chk) |
| { |
| /* FIXME: be sure the CRLF is here or remove it when inserted */ |
| if (!chunk_memcat(chk, tlr.ptr, tlr.len)) |
| return 0; |
| return 1; |
| } |