Mercurial > hg > nginx
annotate src/event/quic/ngx_event_quic_udp.c @ 9107:adcc6d8acfd4 quic
Common tree insert function for QUIC and UDP connections.
Previously, ngx_udp_rbtree_insert_value() was used for plain UDP and
ngx_quic_rbtree_insert_value() was used for QUIC. Because of this it was
impossible to initialize connection tree in ngx_create_listening() since
this function is not aware what kind of listening it creates.
Now ngx_udp_rbtree_insert_value() is used for both QUIC and UDP. To make
is possible, a generic key field is added to ngx_udp_connection_t. It keeps
client address for UDP and connection ID for QUIC.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Sun, 14 May 2023 12:30:11 +0400 |
parents | 3028db26a0f5 |
children | 68fa4b86ed46 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Roman Arutyunyan |
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4 * Copyright (C) Nginx, Inc. |
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 #include <ngx_event_quic_connection.h> |
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12 |
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13 |
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14 static void ngx_quic_close_accepted_connection(ngx_connection_t *c); |
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15 static ngx_connection_t *ngx_quic_lookup_connection(ngx_listening_t *ls, |
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16 ngx_str_t *key, struct sockaddr *local_sockaddr, socklen_t local_socklen); |
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17 |
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18 |
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19 void |
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20 ngx_quic_recvmsg(ngx_event_t *ev) |
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21 { |
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22 ssize_t n; |
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23 ngx_str_t key; |
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24 ngx_buf_t buf; |
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25 ngx_log_t *log; |
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26 ngx_err_t err; |
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27 socklen_t socklen, local_socklen; |
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28 ngx_event_t *rev, *wev; |
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29 struct iovec iov[1]; |
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30 struct msghdr msg; |
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31 ngx_sockaddr_t sa, lsa; |
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32 struct sockaddr *sockaddr, *local_sockaddr; |
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33 ngx_listening_t *ls; |
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34 ngx_event_conf_t *ecf; |
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35 ngx_connection_t *c, *lc; |
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36 ngx_quic_socket_t *qsock; |
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37 static u_char buffer[NGX_QUIC_MAX_UDP_PAYLOAD_SIZE]; |
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38 |
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39 #if (NGX_HAVE_ADDRINFO_CMSG) |
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40 u_char msg_control[CMSG_SPACE(sizeof(ngx_addrinfo_t))]; |
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41 #endif |
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42 |
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43 if (ev->timedout) { |
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44 if (ngx_enable_accept_events((ngx_cycle_t *) ngx_cycle) != NGX_OK) { |
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45 return; |
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46 } |
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47 |
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48 ev->timedout = 0; |
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49 } |
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50 |
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51 ecf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_event_core_module); |
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52 |
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53 if (!(ngx_event_flags & NGX_USE_KQUEUE_EVENT)) { |
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54 ev->available = ecf->multi_accept; |
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55 } |
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56 |
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57 lc = ev->data; |
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58 ls = lc->listening; |
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59 ev->ready = 0; |
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60 |
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61 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
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62 "quic recvmsg on %V, ready: %d", |
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63 &ls->addr_text, ev->available); |
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64 |
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65 do { |
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66 ngx_memzero(&msg, sizeof(struct msghdr)); |
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67 |
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68 iov[0].iov_base = (void *) buffer; |
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69 iov[0].iov_len = sizeof(buffer); |
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70 |
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71 msg.msg_name = &sa; |
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72 msg.msg_namelen = sizeof(ngx_sockaddr_t); |
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73 msg.msg_iov = iov; |
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74 msg.msg_iovlen = 1; |
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75 |
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76 #if (NGX_HAVE_ADDRINFO_CMSG) |
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77 if (ls->wildcard) { |
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78 msg.msg_control = &msg_control; |
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79 msg.msg_controllen = sizeof(msg_control); |
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80 |
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81 ngx_memzero(&msg_control, sizeof(msg_control)); |
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83 #endif |
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84 |
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85 n = recvmsg(lc->fd, &msg, 0); |
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86 |
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87 if (n == -1) { |
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88 err = ngx_socket_errno; |
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89 |
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90 if (err == NGX_EAGAIN) { |
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91 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, err, |
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92 "quic recvmsg() not ready"); |
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93 return; |
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94 } |
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95 |
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96 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "quic recvmsg() failed"); |
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97 |
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98 return; |
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99 } |
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100 |
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101 #if (NGX_HAVE_ADDRINFO_CMSG) |
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102 if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) { |
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103 ngx_log_error(NGX_LOG_ALERT, ev->log, 0, |
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104 "quic recvmsg() truncated data"); |
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|
105 continue; |
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|
106 } |
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107 #endif |
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diff
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|
108 |
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109 sockaddr = msg.msg_name; |
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diff
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|
110 socklen = msg.msg_namelen; |
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parents:
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|
111 |
9017
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112 if (socklen > (socklen_t) sizeof(ngx_sockaddr_t)) { |
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diff
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|
113 socklen = sizeof(ngx_sockaddr_t); |
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114 } |
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115 |
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116 #if (NGX_HAVE_UNIX_DOMAIN) |
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117 |
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118 if (sockaddr->sa_family == AF_UNIX) { |
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119 struct sockaddr_un *saun = (struct sockaddr_un *) sockaddr; |
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120 |
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121 if (socklen <= (socklen_t) offsetof(struct sockaddr_un, sun_path) |
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122 || saun->sun_path[0] == '\0') |
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123 { |
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124 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, |
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125 "unbound unix socket"); |
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126 goto next; |
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127 } |
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128 } |
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129 |
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130 #endif |
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131 |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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132 local_sockaddr = ls->sockaddr; |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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133 local_socklen = ls->socklen; |
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134 |
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Core: added function for local source address cmsg.
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|
135 #if (NGX_HAVE_ADDRINFO_CMSG) |
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136 |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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137 if (ls->wildcard) { |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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138 struct cmsghdr *cmsg; |
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139 |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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140 ngx_memcpy(&lsa, local_sockaddr, local_socklen); |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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141 local_sockaddr = &lsa.sockaddr; |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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142 |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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143 for (cmsg = CMSG_FIRSTHDR(&msg); |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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144 cmsg != NULL; |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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145 cmsg = CMSG_NXTHDR(&msg, cmsg)) |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
146 { |
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Core: added function for local source address cmsg.
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147 if (ngx_get_srcaddr_cmsg(cmsg, local_sockaddr) == NGX_OK) { |
7285
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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148 break; |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
149 } |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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150 } |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
151 } |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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152 |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
153 #endif |
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|
154 |
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|
155 if (ngx_quic_get_packet_dcid(ev->log, buffer, n, &key) != NGX_OK) { |
c2f5d79cde64
QUIC: separate UDP framework for QUIC.
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diff
changeset
|
156 goto next; |
8732
db58c7ef1d7c
QUIC: do not handle empty dcid.
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parents:
8731
diff
changeset
|
157 } |
db58c7ef1d7c
QUIC: do not handle empty dcid.
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diff
changeset
|
158 |
9017
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diff
changeset
|
159 c = ngx_quic_lookup_connection(ls, &key, local_sockaddr, local_socklen); |
7286 | 160 |
161 if (c) { | |
162 | |
163 #if (NGX_DEBUG) | |
164 if (c->log->log_level & NGX_LOG_DEBUG_EVENT) { | |
165 ngx_log_handler_pt handler; | |
166 | |
167 handler = c->log->handler; | |
168 c->log->handler = NULL; | |
169 | |
170 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
9017
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diff
changeset
|
171 "quic recvmsg: fd:%d n:%z", c->fd, n); |
7286 | 172 |
173 c->log->handler = handler; | |
174 } | |
175 #endif | |
176 | |
177 ngx_memzero(&buf, sizeof(ngx_buf_t)); | |
178 | |
179 buf.pos = buffer; | |
180 buf.last = buffer + n; | |
8733
385d511b5064
QUIC: fixed udp buffer initialization.
Vladimir Homutov <vl@nginx.com>
parents:
8732
diff
changeset
|
181 buf.start = buf.pos; |
385d511b5064
QUIC: fixed udp buffer initialization.
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parents:
8732
diff
changeset
|
182 buf.end = buffer + sizeof(buffer); |
7286 | 183 |
9017
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QUIC: separate UDP framework for QUIC.
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diff
changeset
|
184 qsock = ngx_quic_get_socket(c); |
7286 | 185 |
9017
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diff
changeset
|
186 ngx_memcpy(&qsock->sockaddr.sockaddr, sockaddr, socklen); |
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diff
changeset
|
187 qsock->socklen = socklen; |
8734
c61fcdc1b8e3
UDP: extended datagram context.
Vladimir Homutov <vl@nginx.com>
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8733
diff
changeset
|
188 |
9017
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QUIC: separate UDP framework for QUIC.
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diff
changeset
|
189 c->udp->buffer = &buf; |
7440
6d4bc025c5a7
Prevented scheduling events on a shared connection.
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7393
diff
changeset
|
190 |
9017
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diff
changeset
|
191 rev = c->read; |
7286 | 192 rev->ready = 1; |
7440
6d4bc025c5a7
Prevented scheduling events on a shared connection.
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7393
diff
changeset
|
193 rev->active = 0; |
7286 | 194 |
195 rev->handler(rev); | |
196 | |
7391
27559d4a5151
Stream: fixed possible use of a freed connection.
Vladimir Homutov <vl@nginx.com>
parents:
7286
diff
changeset
|
197 if (c->udp) { |
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diff
changeset
|
198 c->udp->buffer = NULL; |
7391
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Stream: fixed possible use of a freed connection.
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diff
changeset
|
199 } |
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Stream: fixed possible use of a freed connection.
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7286
diff
changeset
|
200 |
7286 | 201 rev->ready = 0; |
7440
6d4bc025c5a7
Prevented scheduling events on a shared connection.
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7393
diff
changeset
|
202 rev->active = 1; |
7286 | 203 |
204 goto next; | |
205 } | |
206 | |
7285
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
207 #if (NGX_STAT_STUB) |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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changeset
|
208 (void) ngx_atomic_fetch_add(ngx_stat_accepted, 1); |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
209 #endif |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
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|
210 |
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
211 ngx_accept_disabled = ngx_cycle->connection_n / 8 |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
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|
212 - ngx_cycle->free_connection_n; |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
213 |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
214 c = ngx_get_connection(lc->fd, ev->log); |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
215 if (c == NULL) { |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
216 return; |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
217 } |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
218 |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
219 c->shared = 1; |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
220 c->type = SOCK_DGRAM; |
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9008
diff
changeset
|
221 c->socklen = socklen; |
7285
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
222 |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
223 #if (NGX_STAT_STUB) |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
224 (void) ngx_atomic_fetch_add(ngx_stat_active, 1); |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
225 #endif |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
226 |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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parents:
diff
changeset
|
227 c->pool = ngx_create_pool(ls->pool_size, ev->log); |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
changeset
|
228 if (c->pool == NULL) { |
9017
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changeset
|
229 ngx_quic_close_accepted_connection(c); |
7285
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|
230 return; |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
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|
231 } |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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diff
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232 |
9017
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|
233 c->sockaddr = ngx_palloc(c->pool, NGX_SOCKADDRLEN); |
7285
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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changeset
|
234 if (c->sockaddr == NULL) { |
9017
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|
235 ngx_quic_close_accepted_connection(c); |
7285
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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changeset
|
236 return; |
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
237 } |
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238 |
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239 ngx_memcpy(c->sockaddr, sockaddr, socklen); |
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240 |
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241 log = ngx_palloc(c->pool, sizeof(ngx_log_t)); |
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242 if (log == NULL) { |
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243 ngx_quic_close_accepted_connection(c); |
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244 return; |
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245 } |
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246 |
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247 *log = ls->log; |
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248 |
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249 c->log = log; |
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250 c->pool->log = log; |
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251 c->listening = ls; |
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252 |
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253 if (local_sockaddr == &lsa.sockaddr) { |
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254 local_sockaddr = ngx_palloc(c->pool, local_socklen); |
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255 if (local_sockaddr == NULL) { |
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256 ngx_quic_close_accepted_connection(c); |
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257 return; |
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258 } |
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259 |
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260 ngx_memcpy(local_sockaddr, &lsa, local_socklen); |
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261 } |
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262 |
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263 c->local_sockaddr = local_sockaddr; |
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264 c->local_socklen = local_socklen; |
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265 |
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266 c->buffer = ngx_create_temp_buf(c->pool, n); |
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267 if (c->buffer == NULL) { |
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268 ngx_quic_close_accepted_connection(c); |
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269 return; |
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270 } |
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271 |
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272 c->buffer->last = ngx_cpymem(c->buffer->last, buffer, n); |
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273 |
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274 rev = c->read; |
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275 wev = c->write; |
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276 |
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277 rev->active = 1; |
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278 wev->ready = 1; |
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279 |
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280 rev->log = log; |
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281 wev->log = log; |
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282 |
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283 /* |
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284 * TODO: MT: - ngx_atomic_fetch_add() |
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285 * or protection by critical section or light mutex |
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286 * |
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287 * TODO: MP: - allocated in a shared memory |
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288 * - ngx_atomic_fetch_add() |
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289 * or protection by critical section or light mutex |
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290 */ |
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291 |
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292 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); |
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293 |
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294 c->start_time = ngx_current_msec; |
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295 |
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296 #if (NGX_STAT_STUB) |
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297 (void) ngx_atomic_fetch_add(ngx_stat_handled, 1); |
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298 #endif |
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299 |
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300 if (ls->addr_ntop) { |
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301 c->addr_text.data = ngx_pnalloc(c->pool, ls->addr_text_max_len); |
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302 if (c->addr_text.data == NULL) { |
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303 ngx_quic_close_accepted_connection(c); |
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304 return; |
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305 } |
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306 |
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307 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen, |
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308 c->addr_text.data, |
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309 ls->addr_text_max_len, 0); |
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310 if (c->addr_text.len == 0) { |
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311 ngx_quic_close_accepted_connection(c); |
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312 return; |
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313 } |
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314 } |
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315 |
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316 #if (NGX_DEBUG) |
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317 { |
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318 ngx_str_t addr; |
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319 u_char text[NGX_SOCKADDR_STRLEN]; |
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320 |
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321 ngx_debug_accepted_connection(ecf, c); |
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322 |
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323 if (log->log_level & NGX_LOG_DEBUG_EVENT) { |
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324 addr.data = text; |
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325 addr.len = ngx_sock_ntop(c->sockaddr, c->socklen, text, |
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326 NGX_SOCKADDR_STRLEN, 1); |
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327 |
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328 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, log, 0, |
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329 "*%uA quic recvmsg: %V fd:%d n:%z", |
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330 c->number, &addr, c->fd, n); |
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331 } |
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332 |
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333 } |
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334 #endif |
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335 |
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336 log->data = NULL; |
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337 log->handler = NULL; |
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338 |
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339 ls->handler(c); |
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340 |
7286 | 341 next: |
342 | |
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343 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
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344 ev->available -= n; |
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345 } |
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346 |
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347 } while (ev->available); |
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348 } |
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349 |
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350 |
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351 static void |
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352 ngx_quic_close_accepted_connection(ngx_connection_t *c) |
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353 { |
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354 ngx_free_connection(c); |
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355 |
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356 c->fd = (ngx_socket_t) -1; |
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357 |
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358 if (c->pool) { |
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359 ngx_destroy_pool(c->pool); |
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360 } |
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361 |
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362 #if (NGX_STAT_STUB) |
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363 (void) ngx_atomic_fetch_add(ngx_stat_active, -1); |
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364 #endif |
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365 } |
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366 |
7286 | 367 |
368 static ngx_connection_t * | |
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369 ngx_quic_lookup_connection(ngx_listening_t *ls, ngx_str_t *key, |
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370 struct sockaddr *local_sockaddr, socklen_t local_socklen) |
7286 | 371 { |
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372 uint32_t hash; |
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373 ngx_int_t rc; |
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374 ngx_connection_t *c; |
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375 ngx_rbtree_node_t *node, *sentinel; |
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376 ngx_quic_socket_t *qsock; |
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378 if (key->len == 0) { |
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379 return NULL; |
7286 | 380 } |
381 | |
382 node = ls->rbtree.root; | |
383 sentinel = ls->rbtree.sentinel; | |
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384 hash = ngx_crc32_long(key->data, key->len); |
7286 | 385 |
386 while (node != sentinel) { | |
387 | |
388 if (hash < node->key) { | |
389 node = node->left; | |
390 continue; | |
391 } | |
392 | |
393 if (hash > node->key) { | |
394 node = node->right; | |
395 continue; | |
396 } | |
397 | |
398 /* hash == node->key */ | |
399 | |
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400 qsock = (ngx_quic_socket_t *) node; |
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402 rc = ngx_memn2cmp(key->data, qsock->sid.id, key->len, qsock->sid.len); |
7286 | 403 |
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404 c = qsock->udp.connection; |
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406 if (rc == 0 && ls->wildcard) { | |
407 rc = ngx_cmp_sockaddr(local_sockaddr, local_socklen, | |
408 c->local_sockaddr, c->local_socklen, 1); | |
409 } | |
410 | |
411 if (rc == 0) { | |
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412 c->udp = &qsock->udp; |
7286 | 413 return c; |
414 } | |
415 | |
416 node = (rc < 0) ? node->left : node->right; | |
417 } | |
418 | |
419 return NULL; | |
420 } |