Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/master/listener.c @ 9354:687ac828b964 HEAD

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lib-index: modseqs weren't tracked properly within session when changes were done.
author Timo Sirainen <tss@iki.fi>
date Tue, 01 Sep 2009 13:05:03 -0400
parents 1877cf23eec7
children 00cd9aacd03c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8590
b9faf4db2a9f Updated copyright notices to include year 2009.
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1 /* Copyright (c) 2002-2009 Dovecot authors, see the included COPYING file */
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2
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3 #include "common.h"
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4 #include "array.h"
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5 #include "ioloop.h"
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6 #include "fd-close-on-exec.h"
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7 #include "listener.h"
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8
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9 #include <stdlib.h>
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10 #include <unistd.h>
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11
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12 static void resolve_ip(const char *set_name, const char *name,
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13 struct ip_addr *ip, unsigned int *port)
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14 {
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15 struct ip_addr *ip_list;
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16 const char *p;
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17 unsigned int ips_count;
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18 int ret;
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19
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20 if (*name == '\0') {
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21 /* defaults to "*" or "[::]" */
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22 ip->family = 0;
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23 return;
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24 }
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25
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26 if (name[0] == '[') {
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27 /* IPv6 address */
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28 p = strchr(name, ']');
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29 if (p == NULL) {
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30 i_fatal("%s: Missing ']' in address %s",
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31 set_name, name);
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32 }
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33 name = t_strdup_until(name+1, p);
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34
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35 p++;
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36 if (*p == '\0')
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37 p = NULL;
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38 else if (*p != ':') {
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39 i_fatal("%s: Invalid data after ']' in address %s",
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40 set_name, name);
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41 }
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42 #ifndef HAVE_IPV6
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43 i_fatal("%s: Compiled without IPv6 support, can't listen on %s",
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44 set_name, name);
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45 #endif
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46 } else {
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47 p = strrchr(name, ':');
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48 if (p != NULL)
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49 name = t_strdup_until(name, p);
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50 }
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51
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52 if (p != NULL) {
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53 if (!is_numeric(p+1, '\0')) {
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54 i_fatal("%s: Invalid port in address %s",
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55 set_name, name);
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56 }
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57 *port = atoi(p+1);
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58 }
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59
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60 if (strcmp(name, "*") == 0) {
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61 /* IPv4 any */
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62 net_get_ip_any4(ip);
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63 return;
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64 }
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65
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66 if (strcmp(name, "::") == 0) {
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67 /* IPv6 any */
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68 net_get_ip_any6(ip);
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69 return;
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70 }
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71
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72 /* Return the first IP if there happens to be multiple. */
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73 ret = net_gethostbyname(name, &ip_list, &ips_count);
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74 if (ret != 0) {
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75 i_fatal("%s: Can't resolve address %s: %s",
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76 set_name, name, net_gethosterror(ret));
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77 }
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78
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79 if (ips_count < 1)
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80 i_fatal("%s: No IPs for address: %s", set_name, name);
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81
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82 *ip = ip_list[0];
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83 }
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84
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85 static void
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86 check_conflicts_set(const struct settings *set, const struct ip_addr *ip,
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87 unsigned int port, const char *name1, const char *name2)
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88 {
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89 const struct listener *listens = NULL;
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90 unsigned int i, count;
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91
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92 if (array_is_created(&set->listens))
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93 listens = array_get(&set->listens, &count);
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94 else
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95 count = 0;
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96 for (i = 0; i < count; i++) {
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97 if (listens[i].fd <= 0 || listens[i].port != port ||
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98 !net_ip_compare(&listens[i].ip, ip))
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99 continue;
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100
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101 i_fatal("Protocols %s and %s are listening in same ip/port",
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102 name1, name2);
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103 }
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104
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105 if (array_is_created(&set->ssl_listens))
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106 listens = array_get(&set->ssl_listens, &count);
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107 else
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108 count = 0;
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109 for (i = 0; i < count; i++) {
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110 if (listens[i].fd <= 0 || listens[i].port != port ||
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111 !net_ip_compare(&listens[i].ip, ip))
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112 continue;
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113
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114 i_fatal("Protocols %ss and %ss are listening in same ip/port",
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115 name1, name2);
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116 }
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117 }
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118
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119 static void check_conflicts(const struct ip_addr *ip, unsigned int port,
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120 const char *proto)
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121 {
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122 struct server_settings *server;
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123
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124 for (server = settings_root; server != NULL; server = server->next) {
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125 if (server->imap != NULL) {
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126 check_conflicts_set(server->imap, ip, port,
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127 "imap", proto);
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128 }
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129 if (server->pop3 != NULL) {
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130 check_conflicts_set(server->pop3, ip, port,
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131 "pop3", proto);
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132 }
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133 }
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134 }
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135
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136 static void
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137 listener_init(const char *set_name, const char *listen_list,
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138 unsigned int default_port, ARRAY_TYPE(listener) *listens_arr)
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139 {
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140 const char *const *tmp;
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141 struct listener l, *listens;
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142 unsigned int i, count;
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143
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144 if (!array_is_created(listens_arr))
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145 i_array_init(listens_arr, 4);
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146
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147 listens = array_get_modifiable(listens_arr, &count);
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148 for (i = 0; i < count; i++)
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149 listens[i].wanted = FALSE;
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150
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151 memset(&l, 0, sizeof(l));
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152 l.fd = -1;
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153 l.wanted = TRUE;
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154
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1a58b18652a6 Avoid using shadow variables. Unfortunately -Wshadow also complains about
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155 for (tmp = t_strsplit_spaces(listen_list, ", "); *tmp != NULL; tmp++) {
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156 l.port = default_port;
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157 resolve_ip(set_name, *tmp, &l.ip, &l.port);
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158
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159 /* see if it already exists */
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160 for (i = 0; i < count; i++) {
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161 if (listens[i].port == l.port &&
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162 net_ip_compare(&listens[i].ip, &l.ip)) {
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163 listens[i].wanted = TRUE;
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164 break;
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165 }
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166 }
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167
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168 if (i == count) {
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169 array_append(listens_arr, &l, 1);
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170 listens = array_get_modifiable(listens_arr, &count);
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171 }
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172 }
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173
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174 /* close unwanted fds */
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175 for (i = 0; i < count; ) {
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176 if (listens[i].wanted)
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177 i++;
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178 else {
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179 if (listens[i].fd > 0) {
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180 if (close(listens[i].fd) < 0)
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181 i_error("close(listener) failed: %m");
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182 }
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183 array_delete(listens_arr, i, 1);
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184 listens = array_get_modifiable(listens_arr, &count);
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185 }
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186 }
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187 }
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188
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189 static void listener_close_fds(ARRAY_TYPE(listener) *listens_arr)
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190 {
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191 const struct listener *listens;
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192 unsigned int i, count;
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193
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194 if (!array_is_created(listens_arr))
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195 return;
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196
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197 listens = array_get(listens_arr, &count);
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198 for (i = 0; i < count; i++) {
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199 if (listens[i].fd > 0) {
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200 if (close(listens[i].fd) < 0)
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201 i_error("close(listener) failed: %m");
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202 }
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203 }
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204 array_free(listens_arr);
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205 }
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206
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diff changeset
207 static void listen_parse_and_close_unneeded(struct settings *set)
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208 {
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diff changeset
209 const char *const *proto;
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210 unsigned int default_port;
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1a58b18652a6 Avoid using shadow variables. Unfortunately -Wshadow also complains about
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diff changeset
211 bool nonssl_listen = FALSE, ssl_listen = FALSE;
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212
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213 if (set == NULL)
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214 return;
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215
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216 /* register wanted protocols */
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217 proto = t_strsplit_spaces(set->protocols, " ");
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218 for (; *proto != NULL; proto++) {
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219 if (strcasecmp(*proto, "imap") == 0) {
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220 if (set->protocol == MAIL_PROTOCOL_IMAP)
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1a58b18652a6 Avoid using shadow variables. Unfortunately -Wshadow also complains about
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221 nonssl_listen = TRUE;
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222 } else if (strcasecmp(*proto, "imaps") == 0) {
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223 if (set->protocol == MAIL_PROTOCOL_IMAP &&
8632
5a4fcfde3e91 Renamed "ssl_disable" setting to "ssl". Added support for ssl=required.
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parents: 8593
diff changeset
224 strcmp(set->ssl, "no") != 0)
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225 ssl_listen = TRUE;
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226 } else if (strcasecmp(*proto, "pop3") == 0) {
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227 if (set->protocol == MAIL_PROTOCOL_POP3)
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1a58b18652a6 Avoid using shadow variables. Unfortunately -Wshadow also complains about
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diff changeset
228 nonssl_listen = TRUE;
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229 } else if (strcasecmp(*proto, "pop3s") == 0) {
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230 if (set->protocol == MAIL_PROTOCOL_POP3 &&
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5a4fcfde3e91 Renamed "ssl_disable" setting to "ssl". Added support for ssl=required.
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diff changeset
231 strcmp(set->ssl, "no") != 0)
5887
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diff changeset
232 ssl_listen = TRUE;
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233 }
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234 }
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235
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diff changeset
236 if (!nonssl_listen)
5887
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diff changeset
237 listener_close_fds(&set->listens);
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diff changeset
238 else {
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diff changeset
239 default_port = set->protocol == MAIL_PROTOCOL_IMAP ? 143 : 110;
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diff changeset
240 listener_init("listen", set->listen, default_port,
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diff changeset
241 &set->listens);
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242 }
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243 if (!ssl_listen)
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244 listener_close_fds(&set->ssl_listens);
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245 else {
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246 default_port = set->protocol == MAIL_PROTOCOL_IMAP ? 993 : 995;
6572
79836b3474f4 Use "listen" setting for SSL listeners if "ssl_listen" is empty.
Timo Sirainen <tss@iki.fi>
parents: 6429
diff changeset
247 listener_init("ssl_listen", *set->ssl_listen != '\0' ?
79836b3474f4 Use "listen" setting for SSL listeners if "ssl_listen" is empty.
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diff changeset
248 set->ssl_listen : set->listen, default_port,
5887
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249 &set->ssl_listens);
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250 }
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251 }
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252
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253 static void listen_copy_old(struct settings *old_set, struct settings *new_set)
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254 {
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255 if (old_set == NULL || new_set == NULL) {
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256 if (old_set != NULL) {
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257 listener_close_fds(&old_set->listens);
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258 listener_close_fds(&old_set->ssl_listens);
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259 }
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260 return;
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261 }
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262
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263 i_assert(!array_is_created(&new_set->listens));
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parents:
diff changeset
264 i_assert(!array_is_created(&new_set->ssl_listens));
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265
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266 new_set->listens = old_set->listens;
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267 new_set->ssl_listens = old_set->ssl_listens;
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268
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269 old_set->listens.arr.buffer = NULL;
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diff changeset
270 old_set->ssl_listens.arr.buffer = NULL;
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diff changeset
271 }
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272
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diff changeset
273 static void
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274 listener_array_listen_missing(const char *proto,
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275 ARRAY_TYPE(listener) *listens_arr, bool retry)
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276 {
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277 struct listener *listens;
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278 unsigned int i, j, count;
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279
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280 if (!array_is_created(listens_arr))
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281 return;
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282
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283 listens = array_get_modifiable(listens_arr, &count);
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284 for (i = 0; i < count; i++) {
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285 if (listens[i].fd > 0)
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286 continue;
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287
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288 for (j = 0; j < 10; j++) {
8593
3cccf56e802a Increase listen queues to handle high loads better.
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289 listens[i].fd = net_listen(&listens[i].ip,
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290 &listens[i].port, 128);
5887
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291 if (listens[i].fd != -1)
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292 break;
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293
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294 if (errno == EADDRINUSE) {
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295 /* retry */
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296 } else if (errno == EINTR &&
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297 io_loop_is_running(ioloop)) {
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298 /* SIGHUPing sometimes gets us here.
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299 we don't want to die. */
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300 } else {
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301 /* error */
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302 break;
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303 }
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304
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305 check_conflicts(&listens[i].ip, listens[i].port, proto);
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306 if (!retry)
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307 break;
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308
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309 /* wait a while and try again. we're SIGHUPing
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310 so we most likely just closed it ourself.. */
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311 sleep(1);
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312 }
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313
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314 if (listens[i].fd == -1) {
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315 i_fatal("listen(%s, %d) failed: %m",
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316 net_ip2addr(&listens[i].ip), listens[i].port);
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317 }
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318 net_set_nonblock(listens[i].fd, TRUE);
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319 fd_close_on_exec(listens[i].fd, TRUE);
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320 }
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321 }
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322
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323 static void
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324 listener_listen_missing(struct settings *set, const char *proto, bool retry)
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325 {
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326 listener_array_listen_missing(proto, &set->listens, retry);
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327 listener_array_listen_missing(t_strconcat(proto, "s", NULL),
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328 &set->ssl_listens, retry);
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329 }
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330
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331 void listeners_open_fds(struct server_settings *old_set, bool retry)
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332 {
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diff changeset
333 struct server_settings *server;
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334
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335 for (server = settings_root; server != NULL; server = server->next) {
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diff changeset
336 if (old_set != NULL) {
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337 listen_copy_old(old_set->imap, server->imap);
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338 listen_copy_old(old_set->pop3, server->pop3);
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339 }
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340 listen_parse_and_close_unneeded(server->imap);
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341 listen_parse_and_close_unneeded(server->pop3);
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342
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343 if (old_set != NULL)
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344 old_set = old_set->next;
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345 }
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346
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347 for (server = settings_root; server != NULL; server = server->next) {
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diff changeset
348 if (server->imap != NULL)
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349 listener_listen_missing(server->imap, "imap", retry);
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350 if (server->pop3 != NULL)
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351 listener_listen_missing(server->pop3, "pop3", retry);
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352 }
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353 }
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354
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355 void listeners_close_fds(void)
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356 {
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357 struct server_settings *server;
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358
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359 for (server = settings_root; server != NULL; server = server->next) {
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parents:
diff changeset
360 if (server->imap != NULL) {
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361 listener_close_fds(&server->imap->listens);
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parents:
diff changeset
362 listener_close_fds(&server->imap->ssl_listens);
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parents:
diff changeset
363 }
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diff changeset
364 if (server->pop3 != NULL) {
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diff changeset
365 listener_close_fds(&server->pop3->listens);
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parents:
diff changeset
366 listener_close_fds(&server->pop3->ssl_listens);
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diff changeset
367 }
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diff changeset
368 }
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369 }