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view src/event/ngx_event_udp.h @ 8824:81a3429db8b0 quic

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HTTP/3: delayed Insert Count Increment instruction. Sending the instruction is delayed until the end of the current event cycle. Delaying the instruction is allowed by quic-qpack-21, section 2.2.2.3. The goal is to reduce the amount of data sent back to client by accumulating several inserts in one instruction and sometimes not sending the instruction at all, if Section Acknowledgement was sent just before it.
author Roman Arutyunyan <arut@nginx.com>
date Thu, 27 Jan 2022 12:20:47 +0300
parents e7a2d3914877
children ce6d9cf0f567
line wrap: on
line source


/*
 * 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


typedef struct {
    ngx_buf_t                 *buffer;
    struct sockaddr           *sockaddr;
    socklen_t                  socklen;
} ngx_udp_dgram_t;


struct ngx_udp_connection_s {
    ngx_rbtree_node_t          node;
    ngx_connection_t          *connection;
    ngx_str_t                  key;
    ngx_udp_dgram_t           *dgram;
};


#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);
void ngx_insert_udp_connection(ngx_connection_t *c, ngx_udp_connection_t *udp,
    ngx_str_t *key);

#endif

void ngx_delete_udp_connection(void *data);


#endif /* _NGX_EVENT_UDP_H_INCLUDED_ */