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view src/event/ngx_event_udp.h @ 8917:bb1d1d9d76e2 quic

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QUIC: removed excessive check. The c->udp->dgram may be NULL only if the quic connection was just created: the ngx_event_udp_recvmsg() passes information about datagrams to existing connections by providing information in c->udp. If case of a new connection, c->udp is allocated by the QUIC code during creation of quic connection (it uses c->sockaddr to initialize qsock->path). Thus the check for qsock->path is excessive and can be read wrong, assuming that other options possible, leading to warnings from clang static analyzer.
author Vladimir Homutov <vl@nginx.com>
date Wed, 01 Dec 2021 18:33:29 +0300
parents e7a2d3914877
children ce6d9cf0f567
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


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_ */