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view src/event/ngx_event_udp.h @ 9156:36b59521a41c

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QUIC: refined sending CONNECTION_CLOSE in various packet types. As per RFC 9000, section 10.2.3, to ensure that peer successfully removed packet protection, CONNECTION_CLOSE can be sent in multiple packets using different packet protection levels. Now it is sent in all protection levels available. This roughly corresponds to the following paragraph: * Prior to confirming the handshake, a peer might be unable to process 1-RTT packets, so an endpoint SHOULD send a CONNECTION_CLOSE frame in both Handshake and 1-RTT packets. A server SHOULD also send a CONNECTION_CLOSE frame in an Initial packet. In practice, this change allows to avoid sending an Initial packet when we know the client has handshake keys, by checking if we have discarded initial keys. Also, this fixes sending CONNECTION_CLOSE when using QuicTLS with old QUIC API, where TLS stack releases application read keys before handshake confirmation; it is fixed by sending CONNECTION_CLOSE additionally in a Handshake packet.
author Sergey Kandaurov <pluknet@nginx.com>
date Fri, 01 Sep 2023 20:31:46 +0400
parents adcc6d8acfd4
children
line wrap: on
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/*
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_UDP_H_INCLUDED_
#define _NGX_EVENT_UDP_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


#if !(NGX_WIN32)

#if ((NGX_HAVE_MSGHDR_MSG_CONTROL)                                            \
     && (NGX_HAVE_IP_SENDSRCADDR || NGX_HAVE_IP_RECVDSTADDR                   \
         || NGX_HAVE_IP_PKTINFO                                               \
         || (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO)))
#define NGX_HAVE_ADDRINFO_CMSG  1

#endif


struct ngx_udp_connection_s {
    ngx_rbtree_node_t   node;
    ngx_connection_t   *connection;
    ngx_buf_t          *buffer;
    ngx_str_t           key;
};


#if (NGX_HAVE_ADDRINFO_CMSG)

typedef union {
#if (NGX_HAVE_IP_SENDSRCADDR || NGX_HAVE_IP_RECVDSTADDR)
    struct in_addr        addr;
#endif

#if (NGX_HAVE_IP_PKTINFO)
    struct in_pktinfo     pkt;
#endif

#if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO)
    struct in6_pktinfo    pkt6;
#endif
} ngx_addrinfo_t;

size_t ngx_set_srcaddr_cmsg(struct cmsghdr *cmsg,
    struct sockaddr *local_sockaddr);
ngx_int_t ngx_get_srcaddr_cmsg(struct cmsghdr *cmsg,
    struct sockaddr *local_sockaddr);

#endif

void ngx_event_recvmsg(ngx_event_t *ev);
ssize_t ngx_sendmsg(ngx_connection_t *c, struct msghdr *msg, int flags);
void ngx_udp_rbtree_insert_value(ngx_rbtree_node_t *temp,
    ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
#endif

void ngx_delete_udp_connection(void *data);


#endif /* _NGX_EVENT_UDP_H_INCLUDED_ */