Mercurial > hg > nginx-quic
annotate src/event/ngx_event_udp.c @ 8319:ffcaf0aad9f2 quic
HTTP/3: limited client header size.
The limit is the size of all large client header buffers. Client header size
is the total size of all client header names and values.
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Wed, 17 Feb 2021 11:58:32 +0300 |
| parents | 45db1b5c1706 |
| children | d62a16fff3a4 |
| 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 |
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12 |
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13 #if !(NGX_WIN32) |
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14 |
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15 static void ngx_close_accepted_udp_connection(ngx_connection_t *c); |
| 7286 | 16 static ssize_t ngx_udp_shared_recv(ngx_connection_t *c, u_char *buf, |
| 17 size_t size); | |
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18 static ngx_int_t ngx_create_udp_connection(ngx_connection_t *c); |
| 7286 | 19 static ngx_connection_t *ngx_lookup_udp_connection(ngx_listening_t *ls, |
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20 ngx_str_t *key, struct sockaddr *sockaddr, socklen_t socklen, |
| 7286 | 21 struct sockaddr *local_sockaddr, socklen_t local_socklen); |
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22 |
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23 |
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24 void |
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25 ngx_event_recvmsg(ngx_event_t *ev) |
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26 { |
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27 ssize_t n; |
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28 ngx_str_t key; |
| 7286 | 29 ngx_buf_t buf; |
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30 ngx_log_t *log; |
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31 ngx_err_t err; |
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32 socklen_t socklen, local_socklen; |
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33 ngx_event_t *rev, *wev; |
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34 struct iovec iov[1]; |
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35 struct msghdr msg; |
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36 ngx_sockaddr_t sa, lsa; |
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37 struct sockaddr *sockaddr, *local_sockaddr; |
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38 ngx_listening_t *ls; |
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39 ngx_event_conf_t *ecf; |
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40 ngx_connection_t *c, *lc; |
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41 static u_char buffer[65535]; |
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42 |
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43 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
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44 |
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45 #if (NGX_HAVE_IP_RECVDSTADDR) |
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46 u_char msg_control[CMSG_SPACE(sizeof(struct in_addr))]; |
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47 #elif (NGX_HAVE_IP_PKTINFO) |
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48 u_char msg_control[CMSG_SPACE(sizeof(struct in_pktinfo))]; |
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49 #endif |
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50 |
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51 #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO) |
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52 u_char msg_control6[CMSG_SPACE(sizeof(struct in6_pktinfo))]; |
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53 #endif |
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54 |
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55 #endif |
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56 |
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57 if (ev->timedout) { |
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58 if (ngx_enable_accept_events((ngx_cycle_t *) ngx_cycle) != NGX_OK) { |
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59 return; |
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60 } |
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61 |
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62 ev->timedout = 0; |
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63 } |
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64 |
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65 ecf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_event_core_module); |
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66 |
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67 if (!(ngx_event_flags & NGX_USE_KQUEUE_EVENT)) { |
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68 ev->available = ecf->multi_accept; |
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69 } |
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70 |
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71 lc = ev->data; |
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72 ls = lc->listening; |
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73 ev->ready = 0; |
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74 |
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75 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
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76 "recvmsg on %V, ready: %d", &ls->addr_text, ev->available); |
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77 |
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78 do { |
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79 ngx_memzero(&msg, sizeof(struct msghdr)); |
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80 |
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81 iov[0].iov_base = (void *) buffer; |
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82 iov[0].iov_len = sizeof(buffer); |
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83 |
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84 msg.msg_name = &sa; |
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85 msg.msg_namelen = sizeof(ngx_sockaddr_t); |
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86 msg.msg_iov = iov; |
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87 msg.msg_iovlen = 1; |
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88 |
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89 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
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90 |
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91 if (ls->wildcard) { |
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92 |
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93 #if (NGX_HAVE_IP_RECVDSTADDR || NGX_HAVE_IP_PKTINFO) |
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94 if (ls->sockaddr->sa_family == AF_INET) { |
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95 msg.msg_control = &msg_control; |
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96 msg.msg_controllen = sizeof(msg_control); |
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97 } |
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98 #endif |
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99 |
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100 #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO) |
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101 if (ls->sockaddr->sa_family == AF_INET6) { |
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102 msg.msg_control = &msg_control6; |
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103 msg.msg_controllen = sizeof(msg_control6); |
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104 } |
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105 #endif |
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106 } |
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107 |
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108 #endif |
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109 |
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110 n = recvmsg(lc->fd, &msg, 0); |
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111 |
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112 if (n == -1) { |
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113 err = ngx_socket_errno; |
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114 |
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115 if (err == NGX_EAGAIN) { |
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116 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, err, |
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117 "recvmsg() not ready"); |
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118 return; |
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119 } |
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120 |
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121 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "recvmsg() failed"); |
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122 |
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123 return; |
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124 } |
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125 |
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126 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
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127 if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) { |
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128 ngx_log_error(NGX_LOG_ALERT, ev->log, 0, |
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129 "recvmsg() truncated data"); |
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130 continue; |
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131 } |
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132 #endif |
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133 |
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134 sockaddr = msg.msg_name; |
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135 socklen = msg.msg_namelen; |
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136 |
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137 if (socklen > (socklen_t) sizeof(ngx_sockaddr_t)) { |
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138 socklen = sizeof(ngx_sockaddr_t); |
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139 } |
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140 |
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141 if (socklen == 0) { |
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142 |
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143 /* |
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144 * on Linux recvmsg() returns zero msg_namelen |
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145 * when receiving packets from unbound AF_UNIX sockets |
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146 */ |
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147 |
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148 socklen = sizeof(struct sockaddr); |
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149 ngx_memzero(&sa, sizeof(struct sockaddr)); |
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150 sa.sockaddr.sa_family = ls->sockaddr->sa_family; |
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151 } |
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152 |
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153 local_sockaddr = ls->sockaddr; |
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154 local_socklen = ls->socklen; |
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155 |
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156 #if (NGX_HAVE_MSGHDR_MSG_CONTROL) |
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157 |
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158 if (ls->wildcard) { |
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159 struct cmsghdr *cmsg; |
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160 |
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161 ngx_memcpy(&lsa, local_sockaddr, local_socklen); |
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162 local_sockaddr = &lsa.sockaddr; |
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163 |
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164 for (cmsg = CMSG_FIRSTHDR(&msg); |
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165 cmsg != NULL; |
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166 cmsg = CMSG_NXTHDR(&msg, cmsg)) |
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167 { |
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168 |
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169 #if (NGX_HAVE_IP_RECVDSTADDR) |
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170 |
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171 if (cmsg->cmsg_level == IPPROTO_IP |
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172 && cmsg->cmsg_type == IP_RECVDSTADDR |
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173 && local_sockaddr->sa_family == AF_INET) |
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174 { |
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175 struct in_addr *addr; |
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176 struct sockaddr_in *sin; |
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177 |
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178 addr = (struct in_addr *) CMSG_DATA(cmsg); |
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179 sin = (struct sockaddr_in *) local_sockaddr; |
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180 sin->sin_addr = *addr; |
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181 |
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182 break; |
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183 } |
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184 |
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185 #elif (NGX_HAVE_IP_PKTINFO) |
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186 |
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187 if (cmsg->cmsg_level == IPPROTO_IP |
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188 && cmsg->cmsg_type == IP_PKTINFO |
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189 && local_sockaddr->sa_family == AF_INET) |
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190 { |
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191 struct in_pktinfo *pkt; |
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192 struct sockaddr_in *sin; |
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193 |
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194 pkt = (struct in_pktinfo *) CMSG_DATA(cmsg); |
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195 sin = (struct sockaddr_in *) local_sockaddr; |
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196 sin->sin_addr = pkt->ipi_addr; |
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197 |
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198 break; |
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199 } |
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200 |
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201 #endif |
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202 |
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203 #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO) |
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204 |
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205 if (cmsg->cmsg_level == IPPROTO_IPV6 |
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206 && cmsg->cmsg_type == IPV6_PKTINFO |
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207 && local_sockaddr->sa_family == AF_INET6) |
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208 { |
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209 struct in6_pktinfo *pkt6; |
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210 struct sockaddr_in6 *sin6; |
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211 |
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212 pkt6 = (struct in6_pktinfo *) CMSG_DATA(cmsg); |
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213 sin6 = (struct sockaddr_in6 *) local_sockaddr; |
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214 sin6->sin6_addr = pkt6->ipi6_addr; |
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215 |
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216 break; |
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217 } |
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218 |
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219 #endif |
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220 |
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221 } |
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222 } |
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223 |
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224 #endif |
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225 |
|
8198
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QUIC: connection multiplexing per port.
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226 ngx_str_null(&key); |
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227 |
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228 #if (NGX_QUIC) |
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229 if (ls->quic) { |
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230 if (ngx_quic_get_packet_dcid(ev->log, buffer, n, &key) != NGX_OK) { |
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231 goto next; |
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232 } |
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233 } |
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234 #endif |
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235 |
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236 c = ngx_lookup_udp_connection(ls, &key, sockaddr, socklen, |
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237 local_sockaddr, local_socklen); |
| 7286 | 238 |
| 239 if (c) { | |
| 240 | |
| 241 #if (NGX_DEBUG) | |
| 242 if (c->log->log_level & NGX_LOG_DEBUG_EVENT) { | |
| 243 ngx_log_handler_pt handler; | |
| 244 | |
| 245 handler = c->log->handler; | |
| 246 c->log->handler = NULL; | |
| 247 | |
| 248 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0, | |
| 249 "recvmsg: fd:%d n:%z", c->fd, n); | |
| 250 | |
| 251 c->log->handler = handler; | |
| 252 } | |
| 253 #endif | |
| 254 | |
| 255 ngx_memzero(&buf, sizeof(ngx_buf_t)); | |
| 256 | |
| 257 buf.pos = buffer; | |
| 258 buf.last = buffer + n; | |
| 259 | |
| 260 rev = c->read; | |
| 261 | |
| 262 c->udp->buffer = &buf; | |
|
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263 |
| 7286 | 264 rev->ready = 1; |
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265 rev->active = 0; |
| 7286 | 266 |
| 267 rev->handler(rev); | |
| 268 | |
|
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269 if (c->udp) { |
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270 c->udp->buffer = NULL; |
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271 } |
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272 |
| 7286 | 273 rev->ready = 0; |
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274 rev->active = 1; |
| 7286 | 275 |
| 276 goto next; | |
| 277 } | |
| 278 | |
|
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279 #if (NGX_STAT_STUB) |
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280 (void) ngx_atomic_fetch_add(ngx_stat_accepted, 1); |
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281 #endif |
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282 |
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283 ngx_accept_disabled = ngx_cycle->connection_n / 8 |
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284 - ngx_cycle->free_connection_n; |
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285 |
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286 c = ngx_get_connection(lc->fd, ev->log); |
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287 if (c == NULL) { |
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288 return; |
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289 } |
|
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290 |
|
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291 c->shared = 1; |
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292 c->type = SOCK_DGRAM; |
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293 c->socklen = socklen; |
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294 |
|
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295 #if (NGX_STAT_STUB) |
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|
296 (void) ngx_atomic_fetch_add(ngx_stat_active, 1); |
|
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|
297 #endif |
|
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298 |
|
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299 c->pool = ngx_create_pool(ls->pool_size, ev->log); |
|
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300 if (c->pool == NULL) { |
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301 ngx_close_accepted_udp_connection(c); |
|
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302 return; |
|
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303 } |
|
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304 |
|
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305 c->sockaddr = ngx_palloc(c->pool, socklen); |
|
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|
306 if (c->sockaddr == NULL) { |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
307 ngx_close_accepted_udp_connection(c); |
|
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308 return; |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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309 } |
|
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310 |
|
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311 ngx_memcpy(c->sockaddr, sockaddr, socklen); |
|
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312 |
|
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313 log = ngx_palloc(c->pool, sizeof(ngx_log_t)); |
|
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314 if (log == NULL) { |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
315 ngx_close_accepted_udp_connection(c); |
|
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316 return; |
|
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317 } |
|
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318 |
|
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|
319 *log = ls->log; |
|
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|
320 |
| 7286 | 321 c->recv = ngx_udp_shared_recv; |
|
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|
322 c->send = ngx_udp_send; |
|
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|
323 c->send_chain = ngx_udp_send_chain; |
|
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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324 |
|
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|
325 c->log = log; |
|
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|
326 c->pool->log = log; |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
327 c->listening = ls; |
|
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328 |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
329 if (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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330 local_sockaddr = ngx_palloc(c->pool, local_socklen); |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
331 if (local_sockaddr == NULL) { |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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|
332 ngx_close_accepted_udp_connection(c); |
|
88a624c9b491
Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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changeset
|
333 return; |
|
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Events: moved ngx_recvmsg() to new file src/event/ngx_event_udp.c.
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334 } |
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335 |
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336 ngx_memcpy(local_sockaddr, &lsa, local_socklen); |
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337 } |
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338 |
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339 c->local_sockaddr = local_sockaddr; |
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340 c->local_socklen = local_socklen; |
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341 |
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342 c->buffer = ngx_create_temp_buf(c->pool, n); |
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343 if (c->buffer == NULL) { |
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344 ngx_close_accepted_udp_connection(c); |
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345 return; |
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346 } |
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347 |
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348 c->buffer->last = ngx_cpymem(c->buffer->last, buffer, n); |
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349 |
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350 rev = c->read; |
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351 wev = c->write; |
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352 |
|
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353 rev->active = 1; |
|
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354 wev->ready = 1; |
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355 |
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356 rev->log = log; |
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357 wev->log = log; |
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358 |
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359 /* |
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360 * TODO: MT: - ngx_atomic_fetch_add() |
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361 * or protection by critical section or light mutex |
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362 * |
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363 * TODO: MP: - allocated in a shared memory |
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364 * - ngx_atomic_fetch_add() |
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365 * or protection by critical section or light mutex |
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366 */ |
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367 |
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368 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1); |
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369 |
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370 #if (NGX_STAT_STUB) |
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371 (void) ngx_atomic_fetch_add(ngx_stat_handled, 1); |
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372 #endif |
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373 |
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374 if (ls->addr_ntop) { |
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375 c->addr_text.data = ngx_pnalloc(c->pool, ls->addr_text_max_len); |
|
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376 if (c->addr_text.data == NULL) { |
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377 ngx_close_accepted_udp_connection(c); |
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378 return; |
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379 } |
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380 |
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381 c->addr_text.len = ngx_sock_ntop(c->sockaddr, c->socklen, |
|
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382 c->addr_text.data, |
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383 ls->addr_text_max_len, 0); |
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384 if (c->addr_text.len == 0) { |
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385 ngx_close_accepted_udp_connection(c); |
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386 return; |
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387 } |
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388 } |
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389 |
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390 #if (NGX_DEBUG) |
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391 { |
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392 ngx_str_t addr; |
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393 u_char text[NGX_SOCKADDR_STRLEN]; |
|
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394 |
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|
395 ngx_debug_accepted_connection(ecf, c); |
|
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396 |
|
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|
397 if (log->log_level & NGX_LOG_DEBUG_EVENT) { |
|
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398 addr.data = text; |
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399 addr.len = ngx_sock_ntop(c->sockaddr, c->socklen, text, |
|
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|
400 NGX_SOCKADDR_STRLEN, 1); |
|
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|
401 |
|
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|
402 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, log, 0, |
|
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|
403 "*%uA recvmsg: %V fd:%d n:%z", |
|
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|
404 c->number, &addr, c->fd, n); |
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405 } |
|
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|
406 |
|
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407 } |
|
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|
408 #endif |
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|
409 |
|
8198
45db1b5c1706
QUIC: connection multiplexing per port.
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|
410 if (ngx_create_udp_connection(c) != NGX_OK) { |
| 7286 | 411 ngx_close_accepted_udp_connection(c); |
| 412 return; | |
| 413 } | |
| 414 | |
|
7285
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|
415 log->data = NULL; |
|
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|
416 log->handler = NULL; |
|
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417 |
|
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|
418 ls->handler(c); |
|
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419 |
| 7286 | 420 next: |
| 421 | |
|
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|
422 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
|
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423 ev->available -= n; |
|
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424 } |
|
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425 |
|
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426 } while (ev->available); |
|
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427 } |
|
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428 |
|
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|
429 |
|
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|
430 static void |
|
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|
431 ngx_close_accepted_udp_connection(ngx_connection_t *c) |
|
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432 { |
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433 ngx_free_connection(c); |
|
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|
434 |
|
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|
435 c->fd = (ngx_socket_t) -1; |
|
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|
436 |
|
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|
437 if (c->pool) { |
|
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|
438 ngx_destroy_pool(c->pool); |
|
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439 } |
|
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440 |
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441 #if (NGX_STAT_STUB) |
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442 (void) ngx_atomic_fetch_add(ngx_stat_active, -1); |
|
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443 #endif |
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444 } |
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445 |
| 7286 | 446 |
| 447 static ssize_t | |
| 448 ngx_udp_shared_recv(ngx_connection_t *c, u_char *buf, size_t size) | |
| 449 { | |
| 450 ssize_t n; | |
| 451 ngx_buf_t *b; | |
| 452 | |
| 453 if (c->udp == NULL || c->udp->buffer == NULL) { | |
| 454 return NGX_AGAIN; | |
| 455 } | |
| 456 | |
| 457 b = c->udp->buffer; | |
| 458 | |
| 459 n = ngx_min(b->last - b->pos, (ssize_t) size); | |
| 460 | |
| 461 ngx_memcpy(buf, b->pos, n); | |
| 462 | |
| 463 c->udp->buffer = NULL; | |
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464 |
| 7286 | 465 c->read->ready = 0; |
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466 c->read->active = 1; |
| 7286 | 467 |
| 468 return n; | |
| 469 } | |
| 470 | |
| 471 | |
| 472 void | |
| 473 ngx_udp_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
| 474 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
| 475 { | |
| 476 ngx_int_t rc; | |
| 477 ngx_connection_t *c, *ct; | |
| 478 ngx_rbtree_node_t **p; | |
| 479 ngx_udp_connection_t *udp, *udpt; | |
| 480 | |
| 481 for ( ;; ) { | |
| 482 | |
| 483 if (node->key < temp->key) { | |
| 484 | |
| 485 p = &temp->left; | |
| 486 | |
| 487 } else if (node->key > temp->key) { | |
| 488 | |
| 489 p = &temp->right; | |
| 490 | |
| 491 } else { /* node->key == temp->key */ | |
| 492 | |
| 493 udp = (ngx_udp_connection_t *) node; | |
| 494 c = udp->connection; | |
| 495 | |
| 496 udpt = (ngx_udp_connection_t *) temp; | |
| 497 ct = udpt->connection; | |
| 498 | |
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499 rc = ngx_memn2cmp(udp->key.data, udpt->key.data, |
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500 udp->key.len, udpt->key.len); |
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501 |
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502 if (rc == 0 && udp->key.len == 0) { |
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503 rc = ngx_cmp_sockaddr(c->sockaddr, c->socklen, |
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504 ct->sockaddr, ct->socklen, 1); |
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505 } |
| 7286 | 506 |
| 507 if (rc == 0 && c->listening->wildcard) { | |
| 508 rc = ngx_cmp_sockaddr(c->local_sockaddr, c->local_socklen, | |
| 509 ct->local_sockaddr, ct->local_socklen, 1); | |
| 510 } | |
| 511 | |
| 512 p = (rc < 0) ? &temp->left : &temp->right; | |
| 513 } | |
| 514 | |
| 515 if (*p == sentinel) { | |
| 516 break; | |
| 517 } | |
| 518 | |
| 519 temp = *p; | |
| 520 } | |
| 521 | |
| 522 *p = node; | |
| 523 node->parent = temp; | |
| 524 node->left = sentinel; | |
| 525 node->right = sentinel; | |
| 526 ngx_rbt_red(node); | |
| 527 } | |
| 528 | |
| 529 | |
| 530 static ngx_int_t | |
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531 ngx_create_udp_connection(ngx_connection_t *c) |
| 7286 | 532 { |
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533 ngx_str_t key; |
| 7286 | 534 ngx_pool_cleanup_t *cln; |
| 535 ngx_udp_connection_t *udp; | |
| 536 | |
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537 #if (NGX_QUIC) |
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538 if (c->listening->quic) { |
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539 return NGX_OK; |
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540 } |
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541 #endif |
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542 |
| 7286 | 543 if (c->udp) { |
| 544 return NGX_OK; | |
| 545 } | |
| 546 | |
| 547 udp = ngx_pcalloc(c->pool, sizeof(ngx_udp_connection_t)); | |
| 548 if (udp == NULL) { | |
| 549 return NGX_ERROR; | |
| 550 } | |
| 551 | |
| 552 cln = ngx_pool_cleanup_add(c->pool, 0); | |
| 553 if (cln == NULL) { | |
| 554 return NGX_ERROR; | |
| 555 } | |
| 556 | |
| 557 cln->data = c; | |
| 558 cln->handler = ngx_delete_udp_connection; | |
| 559 | |
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560 key.len = 0; |
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561 |
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562 ngx_insert_udp_connection(c, udp, &key); |
| 7286 | 563 |
| 564 c->udp = udp; | |
| 565 | |
| 566 return NGX_OK; | |
| 567 } | |
| 568 | |
| 569 | |
|
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570 void |
|
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571 ngx_insert_udp_connection(ngx_connection_t *c, ngx_udp_connection_t *udp, |
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572 ngx_str_t *key) |
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573 { |
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574 uint32_t hash; |
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575 |
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576 ngx_crc32_init(hash); |
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577 |
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578 ngx_crc32_update(&hash, key->data, key->len); |
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579 |
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580 if (key->len == 0) { |
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581 ngx_crc32_update(&hash, (u_char *) c->sockaddr, c->socklen); |
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|
582 } |
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583 |
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|
584 if (c->listening->wildcard) { |
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585 ngx_crc32_update(&hash, (u_char *) c->local_sockaddr, c->local_socklen); |
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586 } |
|
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|
587 |
|
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|
588 ngx_crc32_final(hash); |
|
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|
589 |
|
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|
590 udp->connection = c; |
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591 udp->key = *key; |
|
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592 udp->node.key = hash; |
|
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|
593 |
|
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|
594 ngx_rbtree_insert(&c->listening->rbtree, &udp->node); |
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595 } |
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|
596 |
|
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|
597 |
|
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|
598 void |
| 7286 | 599 ngx_delete_udp_connection(void *data) |
| 600 { | |
| 601 ngx_connection_t *c = data; | |
| 602 | |
|
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603 if (c->udp == NULL) { |
|
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|
604 return; |
|
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|
605 } |
|
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|
606 |
| 7286 | 607 ngx_rbtree_delete(&c->listening->rbtree, &c->udp->node); |
|
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|
608 |
|
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|
609 c->udp = NULL; |
| 7286 | 610 } |
| 611 | |
| 612 | |
| 613 static ngx_connection_t * | |
|
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|
614 ngx_lookup_udp_connection(ngx_listening_t *ls, ngx_str_t *key, |
|
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|
615 struct sockaddr *sockaddr, socklen_t socklen, |
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|
616 struct sockaddr *local_sockaddr, socklen_t local_socklen) |
| 7286 | 617 { |
| 618 uint32_t hash; | |
| 619 ngx_int_t rc; | |
| 620 ngx_connection_t *c; | |
| 621 ngx_rbtree_node_t *node, *sentinel; | |
| 622 ngx_udp_connection_t *udp; | |
| 623 | |
| 624 #if (NGX_HAVE_UNIX_DOMAIN) | |
| 625 | |
| 626 if (sockaddr->sa_family == AF_UNIX) { | |
| 627 struct sockaddr_un *saun = (struct sockaddr_un *) sockaddr; | |
| 628 | |
| 629 if (socklen <= (socklen_t) offsetof(struct sockaddr_un, sun_path) | |
| 630 || saun->sun_path[0] == '\0') | |
| 631 { | |
| 632 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, | |
| 633 "unbound unix socket"); | |
| 634 return NULL; | |
| 635 } | |
| 636 } | |
| 637 | |
|
7285
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diff
changeset
|
638 #endif |
| 7286 | 639 |
| 640 node = ls->rbtree.root; | |
| 641 sentinel = ls->rbtree.sentinel; | |
| 642 | |
| 643 ngx_crc32_init(hash); | |
|
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|
644 |
|
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|
645 ngx_crc32_update(&hash, key->data, key->len); |
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|
646 |
|
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|
647 if (key->len == 0) { |
|
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|
648 ngx_crc32_update(&hash, (u_char *) sockaddr, socklen); |
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|
649 } |
| 7286 | 650 |
| 651 if (ls->wildcard) { | |
| 652 ngx_crc32_update(&hash, (u_char *) local_sockaddr, local_socklen); | |
| 653 } | |
| 654 | |
| 655 ngx_crc32_final(hash); | |
| 656 | |
| 657 while (node != sentinel) { | |
| 658 | |
| 659 if (hash < node->key) { | |
| 660 node = node->left; | |
| 661 continue; | |
| 662 } | |
| 663 | |
| 664 if (hash > node->key) { | |
| 665 node = node->right; | |
| 666 continue; | |
| 667 } | |
| 668 | |
| 669 /* hash == node->key */ | |
| 670 | |
| 671 udp = (ngx_udp_connection_t *) node; | |
| 672 | |
| 673 c = udp->connection; | |
| 674 | |
|
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675 rc = ngx_memn2cmp(key->data, udp->key.data, key->len, udp->key.len); |
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|
676 |
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|
677 if (rc == 0 && key->len == 0) { |
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678 rc = ngx_cmp_sockaddr(sockaddr, socklen, |
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679 c->sockaddr, c->socklen, 1); |
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680 } |
| 7286 | 681 |
| 682 if (rc == 0 && ls->wildcard) { | |
| 683 rc = ngx_cmp_sockaddr(local_sockaddr, local_socklen, | |
| 684 c->local_sockaddr, c->local_socklen, 1); | |
| 685 } | |
| 686 | |
| 687 if (rc == 0) { | |
|
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688 if (key->len) { |
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|
689 rc = ngx_cmp_sockaddr(sockaddr, socklen, |
|
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690 c->sockaddr, c->socklen, 1); |
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|
691 |
|
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|
692 if (rc) { |
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|
693 #if (NGX_DEBUG) |
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694 if (c->log->log_level & NGX_LOG_DEBUG_EVENT) { |
|
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695 ngx_str_t addr; |
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696 u_char text[NGX_SOCKADDR_STRLEN]; |
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697 |
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698 addr.data = text; |
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699 addr.len = ngx_sock_ntop(sockaddr, socklen, text, |
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700 NGX_SOCKADDR_STRLEN, 1); |
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701 |
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702 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, |
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703 "client migrated to %V", &addr); |
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704 } |
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705 #endif |
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706 |
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707 if (c->socklen < socklen) { |
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708 c->sockaddr = ngx_palloc(c->pool, socklen); |
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709 if (c->sockaddr == NULL) { |
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710 return c; |
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711 } |
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712 } |
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713 |
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714 ngx_memcpy(c->sockaddr, sockaddr, socklen); |
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715 c->socklen = socklen; |
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716 } |
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717 } |
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718 |
| 7286 | 719 return c; |
| 720 } | |
| 721 | |
| 722 node = (rc < 0) ? node->left : node->right; | |
| 723 } | |
| 724 | |
| 725 return NULL; | |
| 726 } | |
| 727 | |
|
7393
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728 #else |
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729 |
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730 void |
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731 ngx_delete_udp_connection(void *data) |
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732 { |
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733 return; |
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734 } |
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735 |
| 7286 | 736 #endif |