1 2 /* 3 * Copyright (C) Igor Sysoev 4 * Copyright (C) NGINX, Inc. 5 */ 6 7 #include <nxt_main.h> 8 9 10 static u_char *nxt_listen_socket_log_handler(void *ctx, u_char *pos, 11 u_char *last); 12 13 14 nxt_int_t 15 nxt_listen_socket(nxt_task_t *task, nxt_socket_t s, int backlog) 16 { 17 nxt_debug(task, "listen(%d, %d)", s, backlog); 18 19 if (nxt_fast_path(listen(s, backlog) == 0)) { 20 return NXT_OK; 21 } 22 23 nxt_log(task, NXT_LOG_CRIT, "listen(%d, %d) failed %E", 24 s, backlog, nxt_socket_errno); 25 26 return NXT_ERROR; 27 } 28 29 30 nxt_int_t 31 nxt_listen_socket_create(nxt_task_t *task, nxt_listen_socket_t *ls, 32 nxt_bool_t bind_test) 33 { 34 nxt_log_t log, *old; 35 nxt_uint_t family; 36 nxt_socket_t s; 37 nxt_thread_t *thr; 38 nxt_sockaddr_t *sa; 39 40 sa = ls->sockaddr; 41 42 thr = nxt_thread(); 43 old = thr->log; 44 log = *thr->log; 45 log.ctx_handler = nxt_listen_socket_log_handler; 46 log.ctx = sa; 47 thr->log = &log; 48 49 family = sa->u.sockaddr.sa_family; 50 51 s = nxt_socket_create(task, family, sa->type, 0, ls->flags); 52 if (s == -1) { 53 goto socket_fail; 54 } 55 56 if (nxt_socket_setsockopt(task, s, SOL_SOCKET, SO_REUSEADDR, 1) != NXT_OK) { 57 goto fail; 58 } 59 60 #if (NXT_INET6 && defined IPV6_V6ONLY) 61 62 if (family == AF_INET6 && ls->ipv6only) { 63 int ipv6only; 64 65 ipv6only = (ls->ipv6only == 1); 66 67 /* Ignore possible error. TODO: why? */ 68 (void) nxt_socket_setsockopt(task, s, IPPROTO_IPV6, IPV6_V6ONLY, 69 ipv6only); 70 } 71 72 #endif 73 74 #if 0 75 76 /* Ignore possible error. TODO: why? */ 77 (void) nxt_socket_setsockopt(task, s, SOL_SOCKET, SO_SNDBUF, 8192); 78 79 #endif 80 81 #ifdef TCP_DEFER_ACCEPT 82 83 if (ls->read_after_accept) { 84 /* Defer accept() maximum at 1 second. */ 85 /* Ignore possible error. TODO: why? */ 86 (void) nxt_socket_setsockopt(task, s, IPPROTO_TCP, TCP_DEFER_ACCEPT, 1); 87 } 88 89 #endif 90 91 switch (nxt_socket_bind(task, s, sa, bind_test)) { 92 93 case NXT_OK: 94 break; 95 96 case NXT_ERROR: 97 goto fail; 98 99 default: /* NXT_DECLINED: EADDRINUSE on bind() test */ 100 return NXT_OK; 101 } 102 103 #if (NXT_HAVE_UNIX_DOMAIN) 104 105 if (family == AF_UNIX) { 106 nxt_file_name_t *name; 107 nxt_file_access_t access; 108 109 name = (nxt_file_name_t *) sa->u.sockaddr_un.sun_path; 110 111 access = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); 112 113 if (nxt_file_set_access(name, access) != NXT_OK) { 114 goto fail; 115 } 116 117 if (bind_test && nxt_file_delete(name) != NXT_OK) { 118 goto fail; 119 } 120 } 121 122 #endif 123 124 nxt_debug(task, "listen(%d, %d)", s, ls->backlog); 125 126 if (listen(s, ls->backlog) != 0) { 127 nxt_log(task, NXT_LOG_CRIT, "listen(%d, %d) failed %E", 128 s, ls->backlog, nxt_socket_errno); 129 goto fail; 130 } 131 132 ls->socket = s; 133 thr->log = old; 134 135 return NXT_OK; 136 137 fail: 138 139 nxt_socket_close(task, s); 140 141 socket_fail: 142 143 thr->log = old; 144 145 return NXT_ERROR; 146 } 147 148 149 nxt_int_t 150 nxt_listen_socket_update(nxt_task_t *task, nxt_listen_socket_t *ls, 151 nxt_listen_socket_t *prev) 152 { 153 nxt_log_t log, *old; 154 nxt_thread_t *thr; 155 156 ls->socket = prev->socket; 157 158 thr = nxt_thread(); 159 old = thr->log; 160 log = *thr->log; 161 log.ctx_handler = nxt_listen_socket_log_handler; 162 log.ctx = ls->sockaddr; 163 thr->log = &log; 164 165 nxt_debug(task, "listen(%d, %d)", ls->socket, ls->backlog); 166 167 if (listen(ls->socket, ls->backlog) != 0) { 168 nxt_log(task, NXT_LOG_CRIT, "listen(%d, %d) failed %E", 169 ls->socket, ls->backlog, nxt_socket_errno); 170 goto fail; 171 } 172 173 thr->log = old; 174 175 return NXT_OK; 176 177 fail: 178 179 thr->log = old; 180 181 return NXT_ERROR; 182 } 183 184 185 size_t 186 nxt_listen_socket_pool_min_size(nxt_listen_socket_t *ls) 187 { 188 size_t size; 189 190 /* 191 * The first nxt_sockaddr_t is intended for mandatory remote sockaddr 192 * and textual representaion with port. The second nxt_sockaddr_t 193 * is intended for local sockaddr without textual representaion which 194 * may be required to get specific address of connection received on 195 * wildcard AF_INET and AF_INET6 addresses. For AF_UNIX addresses 196 * the local sockaddr is not required. 197 */ 198 199 switch (ls->sockaddr->u.sockaddr.sa_family) { 200 201 #if (NXT_INET6) 202 203 case AF_INET6: 204 ls->socklen = sizeof(struct sockaddr_in6); 205 ls->address_length = NXT_INET6_ADDR_STR_LEN; 206 207 size = offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in6) 208 + NXT_INET6_ADDR_STR_LEN + (sizeof(":65535") - 1); 209 210 if (IN6_IS_ADDR_UNSPECIFIED(&ls->sockaddr->u.sockaddr_in6.sin6_addr)) { 211 size += offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in6); 212 } 213 214 break; 215 216 #endif 217 218 #if (NXT_HAVE_UNIX_DOMAIN) 219 220 case AF_UNIX: 221 /* 222 * A remote socket is usually unbound and thus has unspecified Unix 223 * domain sockaddr_un which can be shortcut to 3 bytes. To handle 224 * a bound remote socket correctly ls->socklen should be at least 225 * sizeof(struct sockaddr_un), see comment in nxt_socket.h. 226 */ 227 ls->socklen = 3; 228 size = ls->socklen + sizeof("unix:") - 1; 229 ls->address_length = sizeof("unix:") - 1; 230 231 break; 232 233 #endif 234 235 default: 236 ls->socklen = sizeof(struct sockaddr_in); 237 ls->address_length = NXT_INET_ADDR_STR_LEN; 238 239 size = offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in) 240 + NXT_INET_ADDR_STR_LEN + (sizeof(":65535") - 1); 241 242 if (ls->sockaddr->u.sockaddr_in.sin_addr.s_addr == INADDR_ANY) { 243 size += offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in); 244 } 245 246 break; 247 } 248 249 #if (NXT_SSLTLS) 250 251 if (ls->ssltls) { 252 size += 4 * sizeof(void *) /* SSL/TLS connection */ 253 + sizeof(nxt_buf_mem_t) 254 + sizeof(nxt_mem_pool_cleanup_t); 255 } 256 257 #endif 258 259 return size // + sizeof(nxt_mem_pool_t) 260 + sizeof(nxt_conn_t) 261 + sizeof(nxt_log_t); 262 } 263 264 265 static u_char * 266 nxt_listen_socket_log_handler(void *ctx, u_char *pos, u_char *end) 267 { 268 nxt_sockaddr_t *sa; 269 270 sa = ctx; 271 272 return nxt_sprintf(pos, end, " while creating listening socket on %*s", 273 sa->length, sa->start); 274 } 275