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MEDIUM: backend: Remove code relying on the HTTP legacy mode

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The L7 loadbalancing algorithms are concerned (uri, url_param and hdr), the
"sni" parameter on the server line and the "source" parameter on the server line
when used with "use_src hdr_ip()".
This commit is contained in:
Christopher Faulet 2019-07-15 15:37:57 +02:00
parent 4cb2828e96
commit 7d37fbb753
1 changed files with 39 additions and 121 deletions
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160
src/backend.c
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@ -321,6 +321,8 @@ static struct server *get_server_ph_post(struct stream *s, const struct server *
unsigned int hash = 0;
struct channel *req = &s->req;
struct proxy *px = s->be;
struct htx *htx = htxbuf(&req->buf);
struct htx_blk *blk;
unsigned int plen = px->lbprm.arg_len;
unsigned long len;
const char *params, *p, *start, *end;
@ -328,36 +330,18 @@ static struct server *get_server_ph_post(struct stream *s, const struct server *
if (px->lbprm.tot_weight == 0)
return NULL;
if (!IS_HTX_STRM(s)) {
struct http_txn *txn = s->txn;
struct http_msg *msg = &txn->req;
p = params = NULL;
len = 0;
for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
enum htx_blk_type type = htx_get_blk_type(blk);
struct ist v;
len = http_body_bytes(msg);
p = params = c_ptr(req, -http_data_rewind(msg));
if (len == 0)
return NULL;
if (len > b_wrap(&req->buf) - p)
len = b_wrap(&req->buf) - p;
}
else {
struct htx *htx = htxbuf(&req->buf);
struct htx_blk *blk;
p = params = NULL;
len = 0;
for (blk = htx_get_first_blk(htx); blk; blk = htx_get_next_blk(htx, blk)) {
enum htx_blk_type type = htx_get_blk_type(blk);
struct ist v;
if (type != HTX_BLK_DATA)
continue;
v = htx_get_blk_value(htx, blk);
p = params = v.ptr;
len = v.len;
break;
}
if (type != HTX_BLK_DATA)
continue;
v = htx_get_blk_value(htx, blk);
p = params = v.ptr;
len = v.len;
break;
}
while (len > plen) {
@ -428,6 +412,8 @@ static struct server *get_server_hh(struct stream *s, const struct server *avoid
unsigned long len;
const char *p;
const char *start, *end;
struct htx *htx = htxbuf(&s->req.buf);
struct http_hdr_ctx ctx = { .blk = NULL };
/* tot_weight appears to mean srv_count */
if (px->lbprm.tot_weight == 0)
@ -437,40 +423,17 @@ static struct server *get_server_hh(struct stream *s, const struct server *avoid
if (px->lbprm.tot_used == 1)
goto hash_done;
if (!IS_HTX_STRM(s)) {
struct http_txn *txn = s->txn;
struct hdr_ctx ctx = { .idx = 0 };
http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
/* if the message is chunked, we skip the chunk size, but use the value as len */
http_find_header2(px->lbprm.arg_str, plen, c_ptr(&s->req, -http_hdr_rewind(&txn->req)),
&txn->hdr_idx, &ctx);
/* if the header is not found or empty, let's fallback to round robin */
if (!ctx.blk || !ctx.value.len)
return NULL;
/* if the header is not found or empty, let's fallback to round robin */
if (!ctx.idx || !ctx.vlen)
return NULL;
/* Found the param_name in the headers.
* we will compute the hash based on this value ctx.val.
*/
len = ctx.vlen;
p = (char *)ctx.line + ctx.val;
}
else {
struct htx *htx = htxbuf(&s->req.buf);
struct http_hdr_ctx ctx = { .blk = NULL };
http_find_header(htx, ist2(px->lbprm.arg_str, plen), &ctx, 0);
/* if the header is not found or empty, let's fallback to round robin */
if (!ctx.blk || !ctx.value.len)
return NULL;
/* Found a the param_name in the headers.
* we will compute the hash based on this value ctx.val.
*/
len = ctx.value.len;
p = ctx.value.ptr;
}
/* Found a the param_name in the headers.
* we will compute the hash based on this value ctx.val.
*/
len = ctx.value.len;
p = ctx.value.ptr;
if (!px->lbprm.arg_opt1) {
hash = gen_hash(px, p, len);
@ -734,13 +697,7 @@ int assign_server(struct stream *s)
case BE_LB_HASH_URI:
/* URI hashing */
if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
break;
if (!IS_HTX_STRM(s))
srv = get_server_uh(s->be,
c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
s->txn->req.sl.rq.u_l, prev_srv);
else {
if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
struct ist uri;
uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
@ -750,29 +707,21 @@ int assign_server(struct stream *s)
case BE_LB_HASH_PRM:
/* URL Parameter hashing */
if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
break;
if (!IS_HTX_STRM(s))
srv = get_server_ph(s->be,
c_ptr(&s->req, -http_uri_rewind(&s->txn->req)),
s->txn->req.sl.rq.u_l, prev_srv);
else {
if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY) {
struct ist uri;
uri = htx_sl_req_uri(http_get_stline(htxbuf(&s->req.buf)));
srv = get_server_ph(s->be, uri.ptr, uri.len, prev_srv);
}
if (!srv && s->txn->meth == HTTP_METH_POST)
srv = get_server_ph_post(s, prev_srv);
if (!srv && s->txn->meth == HTTP_METH_POST)
srv = get_server_ph_post(s, prev_srv);
}
break;
case BE_LB_HASH_HDR:
/* Header Parameter hashing */
if (!s->txn || s->txn->req.msg_state < HTTP_MSG_BODY)
break;
srv = get_server_hh(s, prev_srv);
if (IS_HTX_STRM(s) && s->txn->req.msg_state >= HTTP_MSG_BODY)
srv = get_server_hh(s, prev_srv);
break;
case BE_LB_HASH_RDP:
@ -1103,7 +1052,7 @@ static void assign_tproxy_address(struct stream *s)
memset(&srv_conn->addr.from, 0, sizeof(srv_conn->addr.from));
break;
case CO_SRC_TPROXY_DYN:
if (src->bind_hdr_occ && s->txn) {
if (src->bind_hdr_occ && IS_HTX_STRM(s)) {
char *vptr;
size_t vlen;
@ -1111,24 +1060,12 @@ static void assign_tproxy_address(struct stream *s)
((struct sockaddr_in *)&srv_conn->addr.from)->sin_family = AF_INET;
((struct sockaddr_in *)&srv_conn->addr.from)->sin_port = 0;
((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr = 0;
if (!IS_HTX_STRM(s)) {
int rewind;
c_rew(&s->req, rewind = http_hdr_rewind(&s->txn->req));
if (http_get_hdr(&s->txn->req, src->bind_hdr_name, src->bind_hdr_len,
&s->txn->hdr_idx, src->bind_hdr_occ, NULL, &vptr, &vlen)) {
((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
htonl(inetaddr_host_lim(vptr, vptr + vlen));
}
c_adv(&s->req, rewind);
}
else {
if (http_get_htx_hdr(htxbuf(&s->req.buf),
ist2(src->bind_hdr_name, src->bind_hdr_len),
src->bind_hdr_occ, NULL, &vptr, &vlen)) {
((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
htonl(inetaddr_host_lim(vptr, vptr + vlen));
}
if (http_get_htx_hdr(htxbuf(&s->req.buf),
ist2(src->bind_hdr_name, src->bind_hdr_len),
src->bind_hdr_occ, NULL, &vptr, &vlen)) {
((struct sockaddr_in *)&srv_conn->addr.from)->sin_addr.s_addr =
htonl(inetaddr_host_lim(vptr, vptr + vlen));
}
}
break;
@ -1637,28 +1574,9 @@ int connect_server(struct stream *s)
#ifdef USE_OPENSSL
if (srv->ssl_ctx.sni) {
struct sample *smp;
int rewind;
if (!IS_HTX_STRM(s)) {
/* Tricky case : we have already scheduled the pending
* HTTP request or TCP data for leaving. So in HTTP we
* rewind exactly the headers, otherwise we rewind the
* output data.
*/
rewind = s->txn ? http_hdr_rewind(&s->txn->req) : co_data(&s->req);
c_rew(&s->req, rewind);
smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
srv->ssl_ctx.sni, SMP_T_STR);
/* restore the pointers */
c_adv(&s->req, rewind);
}
else {
smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
srv->ssl_ctx.sni, SMP_T_STR);
}
smp = sample_fetch_as_type(s->be, s->sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL,
srv->ssl_ctx.sni, SMP_T_STR);
if (smp_make_safe(smp)) {
ssl_sock_set_servername(srv_conn,
smp->data.u.str.area);