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Upstream: add support for connection level ALPN protocol negotiation.

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This commit is prepared for HTTP/2 and HTTP/3 support.

The ALPN protocol is now set per-connection in
ngx_http_upstream_ssl_init_connection(), allowing proper protocol negotiation
for each individual upstream connection regardless of SSL context sharing.
This commit is contained in:
Zhidao HONG 2025-07-15 14:54:21 +00:00
parent 0bb7489cb2
commit 675ffc6456
2 changed files with 18 additions and 0 deletions
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17
src/http/ngx_http_upstream.c
View File

@ -1767,6 +1767,23 @@ ngx_http_upstream_ssl_init_connection(ngx_http_request_t *r,
}
}
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
if (u->ssl_alpn_protocol.len) {
if (SSL_set_alpn_protos(c->ssl->connection, u->ssl_alpn_protocol.data,
u->ssl_alpn_protocol.len)
!= 0)
{
ngx_ssl_error(NGX_LOG_ERR, c->log, 0,
"SSL_set_alpn_protos() failed");
ngx_http_upstream_finalize_request(r, u,
NGX_HTTP_INTERNAL_SERVER_ERROR);
return;
}
}
#endif
if (u->conf->ssl_session_reuse) {
c->ssl->save_session = ngx_http_upstream_ssl_save_session;

1
src/http/ngx_http_upstream.h
View File

@ -390,6 +390,7 @@ struct ngx_http_upstream_s {
#if (NGX_HTTP_SSL || NGX_COMPAT)
ngx_str_t ssl_name;
ngx_str_t ssl_alpn_protocol;
#endif
ngx_http_cleanup_pt *cleanup;