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HTTP/3: improved processing of multiple Cookie field lines.

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As per draft-ietf-quic-http, 4.1.1.2, and similar to HTTP/2 specification,
they ought to be concatenated.  This closely follows ngx_http_v2_module.
This commit is contained in:
Sergey Kandaurov 2021-12-30 12:59:32 +03:00
parent 7f0fdd4e14
commit b1356ade07
2 changed files with 152 additions and 14 deletions
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1
src/http/v3/ngx_http_v3.h
View File

@ -123,6 +123,7 @@ struct ngx_http_v3_parse_s {
size_t header_limit;
ngx_http_v3_parse_headers_t headers;
ngx_http_v3_parse_data_t body;
ngx_array_t *cookies;
};

137
src/http/v3/ngx_http_v3_request.c
View File

@ -25,6 +25,8 @@ static ngx_int_t ngx_http_v3_process_pseudo_header(ngx_http_request_t *r,
ngx_str_t *name, ngx_str_t *value);
static ngx_int_t ngx_http_v3_init_pseudo_headers(ngx_http_request_t *r);
static ngx_int_t ngx_http_v3_process_request_header(ngx_http_request_t *r);
static ngx_int_t ngx_http_v3_cookie(ngx_http_request_t *r, ngx_str_t *value);
static ngx_int_t ngx_http_v3_construct_cookie_header(ngx_http_request_t *r);
static void ngx_http_v3_read_client_request_body_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_v3_do_read_client_request_body(ngx_http_request_t *r);
static ngx_int_t ngx_http_v3_request_body_filter(ngx_http_request_t *r,
@ -601,6 +603,8 @@ ngx_http_v3_process_header(ngx_http_request_t *r, ngx_str_t *name,
ngx_http_core_srv_conf_t *cscf;
ngx_http_core_main_conf_t *cmcf;
static ngx_str_t cookie = ngx_string("cookie");
len = name->len + value->len;
if (len > r->v3_parse->header_limit) {
@ -636,6 +640,15 @@ ngx_http_v3_process_header(ngx_http_request_t *r, ngx_str_t *name,
return NGX_ERROR;
}
if (name->len == cookie.len
&& ngx_memcmp(name->data, cookie.data, cookie.len) == 0)
{
if (ngx_http_v3_cookie(r, value) != NGX_OK) {
ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
} else {
h = ngx_list_push(&r->headers_in.headers);
if (h == NULL) {
ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
@ -655,6 +668,7 @@ ngx_http_v3_process_header(ngx_http_request_t *r, ngx_str_t *name,
if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
return NGX_ERROR;
}
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http3 header: \"%V: %V\"", name, value);
@ -981,6 +995,10 @@ ngx_http_v3_process_request_header(ngx_http_request_t *r)
return NGX_ERROR;
}
if (ngx_http_v3_construct_cookie_header(r) != NGX_OK) {
return NGX_ERROR;
}
if (r->headers_in.server.len == 0) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"client sent neither \":authority\" nor \"Host\" header");
@ -1056,6 +1074,125 @@ failed:
}
static ngx_int_t
ngx_http_v3_cookie(ngx_http_request_t *r, ngx_str_t *value)
{
ngx_str_t *val;
ngx_array_t *cookies;
cookies = r->v3_parse->cookies;
if (cookies == NULL) {
cookies = ngx_array_create(r->pool, 2, sizeof(ngx_str_t));
if (cookies == NULL) {
return NGX_ERROR;
}
r->v3_parse->cookies = cookies;
}
val = ngx_array_push(cookies);
if (val == NULL) {
return NGX_ERROR;
}
*val = *value;
return NGX_OK;
}
static ngx_int_t
ngx_http_v3_construct_cookie_header(ngx_http_request_t *r)
{
u_char *buf, *p, *end;
size_t len;
ngx_str_t *vals;
ngx_uint_t i;
ngx_array_t *cookies;
ngx_table_elt_t *h;
ngx_http_header_t *hh;
ngx_http_core_main_conf_t *cmcf;
static ngx_str_t cookie = ngx_string("cookie");
cookies = r->v3_parse->cookies;
if (cookies == NULL) {
return NGX_OK;
}
vals = cookies->elts;
i = 0;
len = 0;
do {
len += vals[i].len + 2;
} while (++i != cookies->nelts);
len -= 2;
buf = ngx_pnalloc(r->pool, len + 1);
if (buf == NULL) {
ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
p = buf;
end = buf + len;
for (i = 0; /* void */ ; i++) {
p = ngx_cpymem(p, vals[i].data, vals[i].len);
if (p == end) {
*p = '\0';
break;
}
*p++ = ';'; *p++ = ' ';
}
h = ngx_list_push(&r->headers_in.headers);
if (h == NULL) {
ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash(
ngx_hash('c', 'o'), 'o'), 'k'), 'i'), 'e');
h->key.len = cookie.len;
h->key.data = cookie.data;
h->value.len = len;
h->value.data = buf;
h->lowcase_key = cookie.data;
cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
hh = ngx_hash_find(&cmcf->headers_in_hash, h->hash,
h->lowcase_key, h->key.len);
if (hh == NULL) {
ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
if (hh->handler(r, h, hh->offset) != NGX_OK) {
/*
* request has been finalized already
* in ngx_http_process_multi_header_lines()
*/
return NGX_ERROR;
}
return NGX_OK;
}
ngx_int_t
ngx_http_v3_read_request_body(ngx_http_request_t *r)
{