src/server/daemon/sessionhandler.c

Sun, 04 Dec 2022 10:20:21 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 04 Dec 2022 10:20:21 +0100
changeset 451
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parent 438
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child 542
1327febf99c4
permissions
-rw-r--r--

fix cgi stderr logger + reuse stderr tmp buffer

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <errno.h>
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32
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33 #include "../public/nsapi.h"
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34
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35 #include "sessionhandler.h"
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36 #include "httprequest.h"
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37 #include "httpparser.h"
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38 #include "log.h"
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39 #include "error.h"
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40 #include "httplistener.h"
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41
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42 typedef struct _event_http_io {
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43 HTTPRequest *request;
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44 HttpParser *parser;
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45 int error;
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46 } EventHttpIO;
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47
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48
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49 int connection_read(Connection *conn, void *buf, int len) {
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50 return (int)read(conn->fd, buf, len);
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51 }
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52
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53 int connection_write(Connection *conn, const void *buf, int len) {
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54 return (int)write(conn->fd, buf, len);
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55 }
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56
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57 void connection_close(Connection *conn) {
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58 while(close(conn->fd)) {
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59 if(errno != EINTR) {
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60 log_ereport(LOG_VERBOSE, "connection close failed: %s", strerror(errno));
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61 break;
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62 }
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63 log_ereport(LOG_VERBOSE, "connection close: EINTR");
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64 }
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65 }
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66
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67 int connection_ssl_read(Connection *conn, void *buf, int len) {
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68 int ret = SSL_read(conn->ssl, buf, len);
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69 if(ret <= 0) {
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70 conn->ssl_error = SSL_get_error(conn->ssl, ret);
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71 }
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72 return ret;
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73 }
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75 int connection_ssl_write(Connection *conn, const void *buf, int len) {
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76 int ret = SSL_write(conn->ssl, buf, len);
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77 if(ret <= 0) {
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78 conn->ssl_error = SSL_get_error(conn->ssl, ret);
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79 }
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80 return ret;
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81 }
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83 void connection_ssl_close(Connection *conn) {
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84 if(!conn->ssl_error) {
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85 int ret = SSL_shutdown(conn->ssl);
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86 if(ret != 1) {
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87 conn->ssl_error = SSL_get_error(conn->ssl, ret);
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88 log_ereport(LOG_VERBOSE, "SSL_shutdown failed: %d", conn->ssl_error);
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89 }
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90 }
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91 while(close(conn->fd)) {
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92 if(errno != EINTR) {
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93 log_ereport(LOG_VERBOSE, "connection close failed: %s", strerror(errno));
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94 break;
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95 }
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96 log_ereport(LOG_VERBOSE, "connection close: EINTR");
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97 }
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98 }
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99
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100 void connection_destroy(Connection *conn) {
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101 cfg_unref(conn->listener->cfg);
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102 conn->close(conn);
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103 if(conn->ssl) {
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104 SSL_free(conn->ssl);
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105 }
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106 free(conn);
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107 }
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108
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109 IOStream* create_connection_iostream(
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110 SessionHandler *sh,
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111 Connection *conn,
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112 pool_handle_t *pool,
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113 WSBool *ssl)
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114 {
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115 IOStream *io = NULL;
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116 if(conn->ssl) {
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117 io = sslstream_new(pool, conn->ssl);
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118 *ssl = 1;
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119 } else {
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120 io = Sysstream_new(pool, conn->fd);
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121 *ssl = 0;
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122 }
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123 return io;
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124 }
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125
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126
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127 SessionHandler* create_basic_session_handler(pool_handle_t *pool) {
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128 BasicSessionHandler *handler = pool_malloc(pool, sizeof(BasicSessionHandler));
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129 handler->threadpool = threadpool_new(4, 8);
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130 threadpool_start(handler->threadpool); // TODO: handle error
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131 handler->sh.enqueue_connection = basic_enq_conn;
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132 handler->sh.keep_alive = basic_keep_alive;
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133 handler->sh.create_iostream = create_connection_iostream;
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134
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135 return (SessionHandler*)handler;
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136 }
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137
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138 void basic_enq_conn(SessionHandler *handler, Connection *conn) {
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139 BasicSessionHandler *sh = (BasicSessionHandler*)handler;
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140 conn->session_handler = handler;
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141 threadpool_run(sh->threadpool, basic_run_session, conn);
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142 }
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143
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144 void* basic_run_session(void *data) {
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145 Connection *conn = (Connection*)data;
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146
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147 HTTPRequest *request = malloc(sizeof(HTTPRequest));
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148 http_request_init(request);
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149 request->connection = conn;
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150
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151 // read request
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152 netbuf *buf = malloc(sizeof(netbuf));
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153 buf->rdtimeout = 120;
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154 buf->pos = 0;
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155 buf->cursize = 0;
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156 buf->maxsize = 2048;
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157 buf->sd = &conn->fd;
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158 buf->inbuf = malloc(2048);
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159 buf->errmsg = NULL;
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160
410
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161 request->netbuf = buf;
1
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162
410
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163 HttpParser *parser = http_parser_new(request);
1
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164 int state;
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165 int r;
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166 r = conn->read(conn, buf->inbuf + buf->pos, buf->maxsize - buf->pos);
410
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167
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168 if(r > 0) {
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169 int err = 0;
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170 buf->cursize += r;
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171 while((state = http_parser_process(parser)) != 0) {
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172 if(state == 2) {
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173 log_ereport(LOG_FAILURE, "basic_run_session: invalid http request");
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174 err = 1;
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175 break;
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176 }
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177 r = conn->read(conn, buf->inbuf + buf->pos, buf->maxsize - buf->pos);
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178 if(r == -1) {
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179 log_ereport(LOG_FAILURE, "basic_run_session: IO error: %s", strerror(errno));
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180 err = 1;
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181 break;
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182 }
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183 buf->cursize += r;
1
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184 }
410
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185
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186 if(!err) {
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187 if(http_parser_validate(parser)) {
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188 // process request
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189 r = handle_request(request, NULL, NULL); // TODO: use correct thread pool
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190 } else {
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191 log_ereport(LOG_FAILURE, "basic_run_session: http parser validation failed");
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192 fatal_error(request, 400);
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193 }
1
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194 }
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195 } else {
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196 log_ereport(LOG_FAILURE, "basic_run_session: IO error: %s", strerror(errno));
180
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197 }
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198
410
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199 free(buf->inbuf);
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200 free(buf);
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201 connection_destroy(conn);
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202 http_parser_free(parser);
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203 http_request_cleanup(request);
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204
1
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205 return NULL;
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206 }
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207
78
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diff changeset
208 void basic_keep_alive(SessionHandler *handler, Connection *conn) {
135
471e28cca288 ucx update
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209 connection_destroy(conn);
78
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210 }
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211
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212
35
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213 /* ----- event session handler ----- */
1
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214
438
22eca559aded refactore http listener creation
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215 SessionHandler* create_event_session_handler(pool_handle_t *pool) {
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216 EventSessionHandler *handler = pool_malloc(pool, sizeof(EventSessionHandler));
35
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217 handler->eventhandler = get_default_event_handler();
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diff changeset
218 handler->sh.enqueue_connection = evt_enq_conn;
78
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diff changeset
219 handler->sh.keep_alive = evt_keep_alive;
191
391ccd490d97 moves IOStream creation to the sessionhandler
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diff changeset
220 handler->sh.create_iostream = create_connection_iostream;
35
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221 return (SessionHandler*)handler;
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222 }
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223
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diff changeset
224 void evt_enq_conn(SessionHandler *handler, Connection *conn) {
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225 // set socket non blocking
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226 int flags;
188
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diff changeset
227 if ((flags = fcntl(conn->fd, F_GETFL, 0)) == -1) {
35
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228 flags = 0;
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229 }
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diff changeset
230 if (fcntl(conn->fd, F_SETFL, flags | O_NONBLOCK) != 0) {
411
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parents: 410
diff changeset
231 log_ereport(LOG_FAILURE, "sessionhandler: fcntl failed: %s", strerror(errno));
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diff changeset
232 connection_destroy(conn);
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diff changeset
233 return;
35
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234 }
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235
411
bbd82eee568e improve sessionhandler error handling
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diff changeset
236 HTTPRequest *request = malloc(sizeof(HTTPRequest));
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parents: 410
diff changeset
237 if(!request) {
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diff changeset
238 connection_destroy(conn);
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diff changeset
239 return;
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parents: 410
diff changeset
240 }
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parents: 410
diff changeset
241 http_request_init(request);
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parents: 410
diff changeset
242 request->connection = conn;
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parents: 410
diff changeset
243 conn->session_handler = handler;
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diff changeset
244
35
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diff changeset
245 // TODO: remove code redundancy (basic_run_session)
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246
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247 // read request
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diff changeset
248 netbuf *buf = malloc(sizeof(netbuf));
411
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diff changeset
249 if(!buf) {
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diff changeset
250 connection_destroy(conn);
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diff changeset
251 http_request_cleanup(request);
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parents: 410
diff changeset
252 return;
bbd82eee568e improve sessionhandler error handling
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parents: 410
diff changeset
253 }
35
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diff changeset
254 buf->rdtimeout = 120;
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diff changeset
255 buf->pos = 0;
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diff changeset
256 buf->cursize = 0;
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diff changeset
257 buf->maxsize = 2048;
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diff changeset
258 buf->sd = &conn->fd;
411
bbd82eee568e improve sessionhandler error handling
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diff changeset
259 buf->errmsg = NULL;
35
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diff changeset
260 buf->inbuf = malloc(2048);
411
bbd82eee568e improve sessionhandler error handling
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diff changeset
261 if(!buf->inbuf) {
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diff changeset
262 connection_destroy(conn);
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diff changeset
263 http_request_cleanup(request);
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parents: 410
diff changeset
264 free(buf);
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diff changeset
265 return;
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diff changeset
266 }
35
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diff changeset
267
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diff changeset
268 request->netbuf = buf;
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269
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diff changeset
270 HttpParser *parser = http_parser_new(request);
411
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diff changeset
271 if(!parser) {
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diff changeset
272 connection_destroy(conn);
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diff changeset
273 http_request_cleanup(request);
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diff changeset
274 free(buf->inbuf);
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diff changeset
275 free(buf);
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diff changeset
276 return;
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parents: 410
diff changeset
277 }
35
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diff changeset
278
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diff changeset
279 EventHttpIO *io = malloc(sizeof(EventHttpIO));
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diff changeset
280 if(io == NULL) {
411
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diff changeset
281 connection_destroy(conn);
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diff changeset
282 http_request_cleanup(request);
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parents: 410
diff changeset
283 free(buf->inbuf);
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diff changeset
284 free(buf);
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diff changeset
285 http_parser_free(parser);
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diff changeset
286 return;
35
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diff changeset
287 }
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diff changeset
288 io->request = request;
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diff changeset
289 io->parser = parser;
152
8b85c5face66 improves sessionhandler logging
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parents: 142
diff changeset
290 io->error = 0;
35
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diff changeset
291
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diff changeset
292 /*
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diff changeset
293 * to start the request handling, we begin with a poll on the socket,
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diff changeset
294 *
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diff changeset
295 * evt_enq_conn() --> event handler --> handle_request()
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diff changeset
296 */
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diff changeset
297
159
9ba9f8befa80 makes EventHandler public
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parents: 152
diff changeset
298 Event *event = malloc(sizeof(Event));
9ba9f8befa80 makes EventHandler public
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parents: 152
diff changeset
299 ZERO(event, sizeof(Event));
194
6345f50208d5 fixes keep-alive with ssl
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parents: 193
diff changeset
300 event->fn = conn->ssl && !conn->ssl_accepted ? evt_request_ssl_accept : evt_request_input;
46
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301 event->finish = evt_request_finish;
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302 event->cookie = io;
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303
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304 EventHandler *ev = ev_instance(((EventSessionHandler*)handler)->eventhandler);
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305
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306 if(ev_pollin(ev, conn->fd, event) != 0) {
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307 // TODO: ev_pollin should log, intercept some errors here
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308 log_ereport(LOG_FAILURE, "Cannot enqueue connection");
411
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309 evt_request_error(ev, event);
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310 }
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311 }
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312
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313 int evt_request_ssl_accept(EventHandler *handler, Event *event) {
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314 EventHttpIO *io = event->cookie;
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315 Connection *conn = io->request->connection;
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316
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317 int ret = SSL_accept(conn->ssl);
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318 if(ret <= 0) {
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319 int error = SSL_get_error(conn->ssl, ret);
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320 char *errstr;
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321 switch(error) {
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322 default: errstr = "unknown"; break;
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323 case SSL_ERROR_WANT_READ: {
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324 event->events = EVENT_POLLIN;
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325 return 1;
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326 }
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327 case SSL_ERROR_WANT_WRITE: {
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328 event->events = EVENT_POLLOUT;
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329 return 1;
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330 }
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331 case SSL_ERROR_ZERO_RETURN: errstr = "SSL_ERROR_ZERO_RETURN"; break;
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332 case SSL_ERROR_WANT_CONNECT: errstr = "SSL_ERROR_WANT_CONNECT"; break;
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333 case SSL_ERROR_WANT_ACCEPT: errstr = "SSL_ERROR_WANT_ACCEPT"; break;
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334 case SSL_ERROR_WANT_X509_LOOKUP: errstr = "SSL_ERROR_WANT_X509_LOOKUP"; break;
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335 case SSL_ERROR_SYSCALL: errstr = "SSL_ERROR_SYSCALL"; break;
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336 case SSL_ERROR_SSL: errstr = "SSL_ERROR_SSL"; break;
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337 }
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338 log_ereport(LOG_VERBOSE, "SSL accept error[%d]: %s", error, errstr);
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339 event->finish = evt_request_error;
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340 io->error = 1;
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341 return 0;
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342 }
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343 conn->ssl_accepted = WS_TRUE;
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344
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345 // SSL_accept successful, start request input now
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346 event->fn = evt_request_input;
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347 return evt_request_input(handler, event);
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348 }
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349
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350 int evt_request_input(EventHandler *handler, Event *event) {
35
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351 EventHttpIO *io = event->cookie;
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352 HttpParser *parser = io->parser;
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353 HTTPRequest *request = io->request;
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354 Connection *conn = io->request->connection;
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355 netbuf *buf = request->netbuf;
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356
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357 int state;
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358 int r;
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359 r = conn->read(
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360 conn,
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361 buf->inbuf + buf->pos,
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362 buf->maxsize - buf->pos);
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363 if(r <= 0) {
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364 if(conn->ssl) {
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365 // SSL specific error handling
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366 switch(conn->ssl_error) {
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367 case SSL_ERROR_WANT_READ: {
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368 event->events = EVENT_POLLIN;
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369 return 1;
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370 }
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371 case SSL_ERROR_WANT_WRITE: {
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372 event->events = EVENT_POLLOUT;
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373 return 1;
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374 }
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375 }
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376 }
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377
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378 event->finish = evt_request_error;
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379 io->error = 1;
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380 return 0;
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381 }
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382 //fwrite(buf->inbuf + buf->pos, 1, r, stdout);
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383 //printf("\n");
35
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384
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385 buf->cursize += r;
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386 state = http_parser_process(parser);
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387 if(state == 2) {
47
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388 // parse error
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389 fatal_error(request, 400);
354
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390 log_ereport(LOG_VERBOSE, "http parser: bad request");
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391 //printf("\n\n%.*s\n\n", parser->request->netbuf->cursize, parser->request->netbuf->inbuf);
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392 //fflush(stdout);
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393 event->finish = evt_request_error;
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diff changeset
394 io->error = 2;
41
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diff changeset
395 return 0;
35
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diff changeset
396 } else if(state == 1) {
41
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diff changeset
397 /*
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398 * we need more data -> return 1 to tell the event handler to
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diff changeset
399 * continue polling
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400 */
159
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401 event->events = EVENT_POLLIN;
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402 return 1;
35
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diff changeset
403 }
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diff changeset
404
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diff changeset
405 // we are done with reading
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diff changeset
406
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diff changeset
407 // set socket blocking
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diff changeset
408 int flags;
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diff changeset
409 if (-1 == (flags = fcntl(request->connection->fd, F_GETFL, 0))) {
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diff changeset
410 flags = 0;
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diff changeset
411 }
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diff changeset
412 if (fcntl(request->connection->fd, F_SETFL, flags & ~O_NONBLOCK) != 0) {
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diff changeset
413 // just close the connection if fcntl fails
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diff changeset
414 event->finish = evt_request_error;
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diff changeset
415 io->error = 3;
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416 return 0;
180
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diff changeset
417 }
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diff changeset
418
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diff changeset
419 if(!http_parser_validate(parser)) {
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diff changeset
420 log_ereport(LOG_FAILURE, "http_parser_validate failed");
411
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diff changeset
421 fatal_error(request, 400);
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diff changeset
422 event->finish = evt_request_error;
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423 return 0;
35
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diff changeset
424 }
180
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diff changeset
425
46
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diff changeset
426 /*
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diff changeset
427 * process request
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diff changeset
428 *
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diff changeset
429 * We return 0 to finish request input. The event handler than stops
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diff changeset
430 * polling and executes event->finish (evt_request_input_finish)
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diff changeset
431 */
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432 return 0;
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diff changeset
433 }
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diff changeset
434
159
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diff changeset
435 int evt_request_finish(EventHandler *h, Event *event) {
46
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diff changeset
436 EventHttpIO *io = event->cookie;
636e05eb48f6 cleaning up resources after requests
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diff changeset
437 HttpParser *parser = io->parser;
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diff changeset
438 HTTPRequest *request = io->request;
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50505dc3f8a6 dynamic thread pool
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diff changeset
439
159
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diff changeset
440 int r = handle_request(request, NULL, h);
47
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diff changeset
441 if(r != 0) {
169
76c96ee18221 check close return value
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diff changeset
442 connection_destroy(request->connection);
47
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diff changeset
443 }
41
bb7a1f5a8b48 added Linux support
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diff changeset
444
46
636e05eb48f6 cleaning up resources after requests
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diff changeset
445 /*
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446 * handle_request can return before the request is finished, but it copies
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447 * all important data. We can free request, parser and event
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448 *
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449 * don't free request->netbuf and request->connection
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450 */
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451 http_request_cleanup(request);
46
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452 http_parser_free(parser);
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453
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454 free(io);
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455 free(event);
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456
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457 return 0;
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458 }
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459
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460 int evt_request_error(EventHandler *h, Event *event) {
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461 EventHttpIO *io = event->cookie;
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462 HttpParser *parser = io->parser;
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463 HTTPRequest *request = io->request;
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464
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465 if(event->error) {
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466 log_ereport(LOG_VERBOSE, "sessionhandler http io error: %d fd: %d", io->error, request->connection->fd);
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467 }
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468
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469 free(request->netbuf->inbuf);
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470 free(request->netbuf);
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471
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472 connection_destroy(request->connection);
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473
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474 http_request_cleanup(request);
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475 http_parser_free(parser);
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476
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477 free(io);
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478 free(event);
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479
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480 return 0;
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481 }
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482
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483 void evt_keep_alive(SessionHandler *handler, Connection *conn) {
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484 // TODO: set timeout
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485
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486 /* TODO:
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487 * Don't just re-enqueue the connection
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488 * create a evt_req_init function which does most of the evt_enq_conn stuff
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489 * but don't poll.
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490 * evt_keep_alive should poll and if an event occurs:
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491 * evt_req_init
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492 * evt_request_input
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493 * evt_enq_conn should do:
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494 * evt_req_init
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495 * ev_pollin
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496 */
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497 evt_enq_conn(handler, conn);
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498 }

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