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[core] adjust buffer use for hdr name for lshpack

This commit is contained in:
Glenn Strauss 2021-06-04 22:44:20 -04:00
parent a8b5ad2b5c
commit 7cd984c51d
1 changed files with 4 additions and 6 deletions
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10
src/h2.c
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@ -1965,8 +1965,9 @@ h2_send_headers (request_st * const r, connection * const con)
/* HTTP/2 requires lowercase keys
* ls-hpack requires key and value be in same buffer
* Since keys are typically short, append (and lowercase) key onto
* end of value buffer */
char * const v = buffer_string_prepare_append(&ds->value, klen);
* end of value buffer, following '\0' after end of value, and
* without modifying ds->value.used or overwriting '\0' */
char * const v = buffer_string_prepare_append(&ds->value, klen)+1;
if (__builtin_expect( (ds->ext != HTTP_HEADER_OTHER), 1)) {
memcpy(v, http_header_lc[ds->ext], klen);
}
@ -1979,7 +1980,6 @@ h2_send_headers (request_st * const r, connection * const con)
for (uint32_t j = 0; j < klen; ++j)
v[j] = !light_isupper(k[j]) ? k[j] : (k[j] | 0x20);
}
/*buffer_commit(&ds->value, klen);*//*(not necessary; truncated below)*/
uint32_t voff = 0;
const char *n;
@ -1992,7 +1992,7 @@ h2_send_headers (request_st * const r, connection * const con)
memset(&lsx, 0, sizeof(lsxpack_header_t));
lsx.hpack_index = http_header_lshpack_idx[ds->ext];
lsx.buf = ds->value.ptr;
lsx.name_offset = vlen;
lsx.name_offset = vlen+1;
lsx.name_len = klen;
lsx.val_offset = voff;
if (NULL == n)
@ -2011,12 +2011,10 @@ h2_send_headers (request_st * const r, connection * const con)
unsigned char * const dst_in = dst;
dst = lshpack_enc_encode(encoder, dst, dst_end, &lsx);
if (dst == dst_in) {
buffer_string_set_length(&ds->value, vlen); /*(restore prior)*/
h2_send_rst_stream(r, con, H2_E_INTERNAL_ERROR);
return;
}
} while (n);
buffer_string_set_length(&ds->value, vlen); /*(restore prior value)*/
}
if (!light_btst(r->resp_htags, HTTP_HEADER_DATE)) {