[core] avoid spurious trace and error abort
[lighttpd.git] / src / network.c
blobf559929418f6de92ea738312d7898d76d2a7019a
1 #include "first.h"
3 #include "network.h"
4 #include "fdevent.h"
5 #include "log.h"
6 #include "connections.h"
7 #include "plugin.h"
8 #include "joblist.h"
9 #include "configfile.h"
11 #include "network_backends.h"
12 #include "sys-mmap.h"
13 #include "sys-socket.h"
15 #include <sys/types.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
19 #include <errno.h>
20 #include <fcntl.h>
21 #include <unistd.h>
22 #include <string.h>
23 #include <stdlib.h>
24 #include <assert.h>
26 #ifdef USE_OPENSSL
27 # include <openssl/ssl.h>
28 # include <openssl/err.h>
29 # include <openssl/rand.h>
30 # ifndef OPENSSL_NO_DH
31 # include <openssl/dh.h>
32 # endif
33 # include <openssl/bn.h>
35 # if OPENSSL_VERSION_NUMBER >= 0x0090800fL
36 # ifndef OPENSSL_NO_ECDH
37 # include <openssl/ecdh.h>
38 # endif
39 # endif
40 #endif
42 #ifdef USE_OPENSSL
43 static void ssl_info_callback(const SSL *ssl, int where, int ret) {
44 UNUSED(ret);
46 if (0 != (where & SSL_CB_HANDSHAKE_START)) {
47 connection *con = SSL_get_app_data(ssl);
48 ++con->renegotiations;
51 #endif
53 void
54 network_accept_tcp_nagle_disable (const int fd)
56 static int noinherit_tcpnodelay = -1;
57 int opt;
59 if (!noinherit_tcpnodelay) /* TCP_NODELAY inherited from listen socket */
60 return;
62 if (noinherit_tcpnodelay < 0) {
63 socklen_t optlen = sizeof(opt);
64 if (0 == getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen)) {
65 noinherit_tcpnodelay = !opt;
66 if (opt) /* TCP_NODELAY inherited from listen socket */
67 return;
71 opt = 1;
72 (void)setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
75 static handler_t network_server_handle_fdevent(server *srv, void *context, int revents) {
76 server_socket *srv_socket = (server_socket *)context;
77 connection *con;
78 int loops = 0;
80 UNUSED(context);
82 if (0 == (revents & FDEVENT_IN)) {
83 log_error_write(srv, __FILE__, __LINE__, "sdd",
84 "strange event for server socket",
85 srv_socket->fd,
86 revents);
87 return HANDLER_ERROR;
90 /* accept()s at most 100 connections directly
92 * we jump out after 100 to give the waiting connections a chance */
93 for (loops = 0; loops < 100 && NULL != (con = connection_accept(srv, srv_socket)); loops++) {
94 connection_state_machine(srv, con);
96 return HANDLER_GO_ON;
99 #if defined USE_OPENSSL && ! defined OPENSSL_NO_TLSEXT
100 static int network_ssl_servername_callback(SSL *ssl, int *al, server *srv) {
101 const char *servername;
102 connection *con = (connection *) SSL_get_app_data(ssl);
103 UNUSED(al);
105 buffer_copy_string(con->uri.scheme, "https");
107 if (NULL == (servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name))) {
108 #if 0
109 /* this "error" just means the client didn't support it */
110 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
111 "failed to get TLS server name");
112 #endif
113 return SSL_TLSEXT_ERR_NOACK;
115 buffer_copy_string(con->tlsext_server_name, servername);
116 buffer_to_lower(con->tlsext_server_name);
118 /* Sometimes this is still set, confusing COMP_HTTP_HOST */
119 buffer_reset(con->uri.authority);
121 config_cond_cache_reset(srv, con);
122 config_setup_connection(srv, con);
124 con->conditional_is_valid[COMP_SERVER_SOCKET] = 1;
125 con->conditional_is_valid[COMP_HTTP_SCHEME] = 1;
126 con->conditional_is_valid[COMP_HTTP_HOST] = 1;
127 config_patch_connection(srv, con);
129 if (NULL == con->conf.ssl_pemfile_x509 || NULL == con->conf.ssl_pemfile_pkey) {
130 /* x509/pkey available <=> pemfile was set <=> pemfile got patched: so this should never happen, unless you nest $SERVER["socket"] */
131 log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
132 "no certificate/private key for TLS server name", con->tlsext_server_name);
133 return SSL_TLSEXT_ERR_ALERT_FATAL;
136 /* first set certificate! setting private key checks whether certificate matches it */
137 if (!SSL_use_certificate(ssl, con->conf.ssl_pemfile_x509)) {
138 log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
139 "failed to set certificate for TLS server name", con->tlsext_server_name,
140 ERR_error_string(ERR_get_error(), NULL));
141 return SSL_TLSEXT_ERR_ALERT_FATAL;
144 if (!SSL_use_PrivateKey(ssl, con->conf.ssl_pemfile_pkey)) {
145 log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
146 "failed to set private key for TLS server name", con->tlsext_server_name,
147 ERR_error_string(ERR_get_error(), NULL));
148 return SSL_TLSEXT_ERR_ALERT_FATAL;
151 if (con->conf.ssl_verifyclient) {
152 if (NULL == con->conf.ssl_ca_file_cert_names) {
153 log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
154 "can't verify client without ssl.ca-file for TLS server name", con->tlsext_server_name,
155 ERR_error_string(ERR_get_error(), NULL));
156 return SSL_TLSEXT_ERR_ALERT_FATAL;
159 SSL_set_client_CA_list(ssl, SSL_dup_CA_list(con->conf.ssl_ca_file_cert_names));
160 /* forcing verification here is really not that useful - a client could just connect without SNI */
161 SSL_set_verify(
162 ssl,
163 SSL_VERIFY_PEER | (con->conf.ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0),
164 NULL
166 SSL_set_verify_depth(ssl, con->conf.ssl_verifyclient_depth);
167 } else {
168 SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL);
171 return SSL_TLSEXT_ERR_OK;
173 #endif
175 static int network_server_init(server *srv, buffer *host_token, specific_config *s) {
176 int val;
177 socklen_t addr_len;
178 server_socket *srv_socket;
179 unsigned int port = 0;
180 const char *host;
181 buffer *b;
182 int err;
184 #ifdef __WIN32
185 WORD wVersionRequested;
186 WSADATA wsaData;
188 wVersionRequested = MAKEWORD( 2, 2 );
190 err = WSAStartup( wVersionRequested, &wsaData );
191 if ( err != 0 ) {
192 /* Tell the user that we could not find a usable */
193 /* WinSock DLL. */
194 return -1;
196 #endif
197 err = -1;
199 srv_socket = calloc(1, sizeof(*srv_socket));
200 force_assert(NULL != srv_socket);
201 srv_socket->addr.plain.sa_family = AF_INET; /* default */
202 srv_socket->fd = -1;
203 srv_socket->fde_ndx = -1;
205 srv_socket->srv_token = buffer_init();
206 buffer_copy_buffer(srv_socket->srv_token, host_token);
208 b = buffer_init();
209 buffer_copy_buffer(b, host_token);
211 host = b->ptr;
213 if (host[0] == '/') {
214 /* host is a unix-domain-socket */
215 #ifdef HAVE_SYS_UN_H
216 srv_socket->addr.plain.sa_family = AF_UNIX;
217 #else
218 log_error_write(srv, __FILE__, __LINE__, "s",
219 "ERROR: Unix Domain sockets are not supported.");
220 goto error_free_socket;
221 #endif
222 } else {
223 /* ipv4:port
224 * [ipv6]:port
226 size_t len = buffer_string_length(b);
227 char *sp = NULL;
228 if (0 == len) {
229 log_error_write(srv, __FILE__, __LINE__, "s", "value of $SERVER[\"socket\"] must not be empty");
230 goto error_free_socket;
232 if ((b->ptr[0] == '[' && b->ptr[len-1] == ']') || NULL == (sp = strrchr(b->ptr, ':'))) {
233 /* use server.port if set in config, or else default from config_set_defaults() */
234 port = srv->srvconf.port;
235 sp = b->ptr + len; /* point to '\0' at end of string so end of IPv6 address can be found below */
236 } else {
237 /* found ip:port separator at *sp; port doesn't end in ']', so *sp hopefully doesn't split an IPv6 address */
238 *sp = '\0';
239 port = strtol(sp+1, NULL, 10);
242 /* check for [ and ] */
243 if (b->ptr[0] == '[' && *(sp-1) == ']') {
244 *(sp-1) = '\0';
245 host++;
247 s->use_ipv6 = 1;
250 if (port == 0 || port > 65535) {
251 log_error_write(srv, __FILE__, __LINE__, "sd", "port not set or out of range:", port);
253 goto error_free_socket;
257 if (*host == '\0') host = NULL;
259 #ifdef HAVE_IPV6
260 if (s->use_ipv6) {
261 srv_socket->addr.plain.sa_family = AF_INET6;
263 #endif
265 switch(srv_socket->addr.plain.sa_family) {
266 #ifdef HAVE_IPV6
267 case AF_INET6:
268 memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in6));
269 srv_socket->addr.ipv6.sin6_family = AF_INET6;
270 if (host == NULL) {
271 srv_socket->addr.ipv6.sin6_addr = in6addr_any;
272 log_error_write(srv, __FILE__, __LINE__, "s", "warning: please use server.use-ipv6 only for hostnames, not without server.bind / empty address; your config will break if the kernel default for IPV6_V6ONLY changes");
273 } else {
274 struct addrinfo hints, *res;
275 int r;
277 memset(&hints, 0, sizeof(hints));
279 hints.ai_family = AF_INET6;
280 hints.ai_socktype = SOCK_STREAM;
281 hints.ai_protocol = IPPROTO_TCP;
283 if (0 != (r = getaddrinfo(host, NULL, &hints, &res))) {
284 log_error_write(srv, __FILE__, __LINE__,
285 "sssss", "getaddrinfo failed: ",
286 gai_strerror(r), "'", host, "'");
288 goto error_free_socket;
291 memcpy(&(srv_socket->addr), res->ai_addr, res->ai_addrlen);
293 freeaddrinfo(res);
295 srv_socket->addr.ipv6.sin6_port = htons(port);
296 addr_len = sizeof(struct sockaddr_in6);
297 break;
298 #endif
299 case AF_INET:
300 memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in));
301 srv_socket->addr.ipv4.sin_family = AF_INET;
302 if (host == NULL) {
303 srv_socket->addr.ipv4.sin_addr.s_addr = htonl(INADDR_ANY);
304 } else {
305 struct hostent *he;
306 if (NULL == (he = gethostbyname(host))) {
307 log_error_write(srv, __FILE__, __LINE__,
308 "sds", "gethostbyname failed: ",
309 h_errno, host);
310 goto error_free_socket;
313 if (he->h_addrtype != AF_INET) {
314 log_error_write(srv, __FILE__, __LINE__, "sd", "addr-type != AF_INET: ", he->h_addrtype);
315 goto error_free_socket;
318 if (he->h_length != sizeof(struct in_addr)) {
319 log_error_write(srv, __FILE__, __LINE__, "sd", "addr-length != sizeof(in_addr): ", he->h_length);
320 goto error_free_socket;
323 memcpy(&(srv_socket->addr.ipv4.sin_addr.s_addr), he->h_addr_list[0], he->h_length);
325 srv_socket->addr.ipv4.sin_port = htons(port);
326 addr_len = sizeof(struct sockaddr_in);
327 break;
328 #ifdef HAVE_SYS_UN_H
329 case AF_UNIX:
330 memset(&srv_socket->addr, 0, sizeof(struct sockaddr_un));
331 srv_socket->addr.un.sun_family = AF_UNIX;
333 size_t hostlen = strlen(host) + 1;
334 if (hostlen > sizeof(srv_socket->addr.un.sun_path)) {
335 log_error_write(srv, __FILE__, __LINE__, "sS", "unix socket filename too long:", host);
336 goto error_free_socket;
338 memcpy(srv_socket->addr.un.sun_path, host, hostlen);
340 #if defined(SUN_LEN)
341 addr_len = SUN_LEN(&srv_socket->addr.un);
342 #else
343 /* stevens says: */
344 addr_len = hostlen + sizeof(srv_socket->addr.un.sun_family);
345 #endif
348 break;
349 #endif
350 default:
351 goto error_free_socket;
354 if (srv->srvconf.preflight_check) {
355 err = 0;
356 goto error_free_socket;
359 if (srv->sockets_disabled) { /* lighttpd -1 (one-shot mode) */
360 #ifdef USE_OPENSSL
361 if (s->ssl_enabled) srv_socket->ssl_ctx = s->ssl_ctx;
362 #endif
363 goto srv_sockets_append;
366 #ifdef HAVE_SYS_UN_H
367 if (AF_UNIX == srv_socket->addr.plain.sa_family) {
368 /* check if the socket exists and try to connect to it. */
369 force_assert(host); /*(static analysis hint)*/
370 if (-1 == (srv_socket->fd = socket(srv_socket->addr.plain.sa_family, SOCK_STREAM, 0))) {
371 log_error_write(srv, __FILE__, __LINE__, "ss", "socket failed:", strerror(errno));
372 goto error_free_socket;
374 if (0 == connect(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) {
375 log_error_write(srv, __FILE__, __LINE__, "ss",
376 "server socket is still in use:",
377 host);
380 goto error_free_socket;
383 /* connect failed */
384 switch(errno) {
385 case ECONNREFUSED:
386 unlink(host);
387 break;
388 case ENOENT:
389 break;
390 default:
391 log_error_write(srv, __FILE__, __LINE__, "sds",
392 "testing socket failed:",
393 host, strerror(errno));
395 goto error_free_socket;
397 } else
398 #endif
400 if (-1 == (srv_socket->fd = socket(srv_socket->addr.plain.sa_family, SOCK_STREAM, IPPROTO_TCP))) {
401 log_error_write(srv, __FILE__, __LINE__, "ss", "socket failed:", strerror(errno));
402 goto error_free_socket;
405 #ifdef HAVE_IPV6
406 if (AF_INET6 == srv_socket->addr.plain.sa_family
407 && host != NULL) {
408 if (s->set_v6only) {
409 val = 1;
410 if (-1 == setsockopt(srv_socket->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) {
411 log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(IPV6_V6ONLY) failed:", strerror(errno));
412 goto error_free_socket;
414 } else {
415 log_error_write(srv, __FILE__, __LINE__, "s", "warning: server.set-v6only will be removed soon, update your config to have different sockets for ipv4 and ipv6");
418 #endif
421 /* set FD_CLOEXEC now, fdevent_fcntl_set is called later; needed for pipe-logger forks */
422 fd_close_on_exec(srv_socket->fd);
424 /* */
425 srv->cur_fds = srv_socket->fd;
427 val = 1;
428 if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
429 log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(SO_REUSEADDR) failed:", strerror(errno));
430 goto error_free_socket;
433 if (srv_socket->addr.plain.sa_family != AF_UNIX) {
434 val = 1;
435 if (setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)) < 0) {
436 log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(TCP_NODELAY) failed:", strerror(errno));
437 goto error_free_socket;
441 if (0 != bind(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) {
442 switch(srv_socket->addr.plain.sa_family) {
443 case AF_UNIX:
444 log_error_write(srv, __FILE__, __LINE__, "sds",
445 "can't bind to socket:",
446 host, strerror(errno));
447 break;
448 default:
449 log_error_write(srv, __FILE__, __LINE__, "ssds",
450 "can't bind to port:",
451 host, port, strerror(errno));
452 break;
454 goto error_free_socket;
457 if (-1 == listen(srv_socket->fd, s->listen_backlog)) {
458 log_error_write(srv, __FILE__, __LINE__, "ss", "listen failed: ", strerror(errno));
459 goto error_free_socket;
462 if (s->ssl_enabled) {
463 #ifdef USE_OPENSSL
464 if (NULL == (srv_socket->ssl_ctx = s->ssl_ctx)) {
465 log_error_write(srv, __FILE__, __LINE__, "s", "ssl.pemfile has to be set");
466 goto error_free_socket;
468 #else
470 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
471 "ssl requested but openssl support is not compiled in");
473 goto error_free_socket;
474 #endif
475 #ifdef TCP_DEFER_ACCEPT
476 } else if (s->defer_accept) {
477 int v = s->defer_accept;
478 if (-1 == setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &v, sizeof(v))) {
479 log_error_write(srv, __FILE__, __LINE__, "ss", "can't set TCP_DEFER_ACCEPT: ", strerror(errno));
481 #endif
482 #if defined(__FreeBSD__) || defined(__NetBSD__) \
483 || defined(__OpenBSD__) || defined(__DragonflyBSD__)
484 } else if (!buffer_is_empty(s->bsd_accept_filter)
485 && (buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("httpready"))
486 || buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("dataready")))) {
487 #ifdef SO_ACCEPTFILTER
488 /* FreeBSD accf_http filter */
489 struct accept_filter_arg afa;
490 memset(&afa, 0, sizeof(afa));
491 strncpy(afa.af_name, s->bsd_accept_filter->ptr, sizeof(afa.af_name));
492 if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)) < 0) {
493 if (errno != ENOENT) {
494 log_error_write(srv, __FILE__, __LINE__, "SBss", "can't set accept-filter '", s->bsd_accept_filter, "':", strerror(errno));
497 #endif
498 #endif
501 srv_sockets_append:
502 srv_socket->is_ssl = s->ssl_enabled;
504 if (srv->srv_sockets.size == 0) {
505 srv->srv_sockets.size = 4;
506 srv->srv_sockets.used = 0;
507 srv->srv_sockets.ptr = malloc(srv->srv_sockets.size * sizeof(server_socket*));
508 force_assert(NULL != srv->srv_sockets.ptr);
509 } else if (srv->srv_sockets.used == srv->srv_sockets.size) {
510 srv->srv_sockets.size += 4;
511 srv->srv_sockets.ptr = realloc(srv->srv_sockets.ptr, srv->srv_sockets.size * sizeof(server_socket*));
512 force_assert(NULL != srv->srv_sockets.ptr);
515 srv->srv_sockets.ptr[srv->srv_sockets.used++] = srv_socket;
517 buffer_free(b);
519 return 0;
521 error_free_socket:
522 if (srv_socket->fd != -1) {
523 /* check if server fd are already registered */
524 if (srv_socket->fde_ndx != -1) {
525 fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
526 fdevent_unregister(srv->ev, srv_socket->fd);
529 close(srv_socket->fd);
531 buffer_free(srv_socket->srv_token);
532 free(srv_socket);
534 buffer_free(b);
536 return err; /* -1 if error; 0 if srv->srvconf.preflight_check successful */
539 int network_close(server *srv) {
540 size_t i;
541 for (i = 0; i < srv->srv_sockets.used; i++) {
542 server_socket *srv_socket = srv->srv_sockets.ptr[i];
544 if (srv_socket->fd != -1) {
545 /* check if server fd are already registered */
546 if (srv_socket->fde_ndx != -1) {
547 fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
548 fdevent_unregister(srv->ev, srv_socket->fd);
551 close(srv_socket->fd);
554 buffer_free(srv_socket->srv_token);
556 free(srv_socket);
559 free(srv->srv_sockets.ptr);
561 return 0;
564 typedef enum {
565 NETWORK_BACKEND_UNSET,
566 NETWORK_BACKEND_WRITE,
567 NETWORK_BACKEND_WRITEV,
568 NETWORK_BACKEND_SENDFILE,
569 } network_backend_t;
571 #ifdef USE_OPENSSL
572 static X509* x509_load_pem_file(server *srv, const char *file) {
573 BIO *in;
574 X509 *x = NULL;
576 in = BIO_new(BIO_s_file());
577 if (NULL == in) {
578 log_error_write(srv, __FILE__, __LINE__, "S", "SSL: BIO_new(BIO_s_file()) failed");
579 goto error;
582 if (BIO_read_filename(in,file) <= 0) {
583 log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: BIO_read_filename('", file,"') failed");
584 goto error;
586 x = PEM_read_bio_X509(in, NULL, NULL, NULL);
588 if (NULL == x) {
589 log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: couldn't read X509 certificate from '", file,"'");
590 goto error;
593 BIO_free(in);
594 return x;
596 error:
597 if (NULL != in) BIO_free(in);
598 return NULL;
601 static EVP_PKEY* evp_pkey_load_pem_file(server *srv, const char *file) {
602 BIO *in;
603 EVP_PKEY *x = NULL;
605 in=BIO_new(BIO_s_file());
606 if (NULL == in) {
607 log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BIO_new(BIO_s_file()) failed");
608 goto error;
611 if (BIO_read_filename(in,file) <= 0) {
612 log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: BIO_read_filename('", file,"') failed");
613 goto error;
615 x = PEM_read_bio_PrivateKey(in, NULL, NULL, NULL);
617 if (NULL == x) {
618 log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: couldn't read private key from '", file,"'");
619 goto error;
622 BIO_free(in);
623 return x;
625 error:
626 if (NULL != in) BIO_free(in);
627 return NULL;
630 static int network_openssl_load_pemfile(server *srv, size_t ndx) {
631 specific_config *s = srv->config_storage[ndx];
633 #ifdef OPENSSL_NO_TLSEXT
635 data_config *dc = (data_config *)srv->config_context->data[ndx];
636 if ((ndx > 0 && (COMP_SERVER_SOCKET != dc->comp || dc->cond != CONFIG_COND_EQ))
637 || !s->ssl_enabled) {
638 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
639 "ssl.pemfile only works in SSL socket binding context as openssl version does not support TLS extensions");
640 return -1;
643 #endif
645 if (NULL == (s->ssl_pemfile_x509 = x509_load_pem_file(srv, s->ssl_pemfile->ptr))) return -1;
646 if (NULL == (s->ssl_pemfile_pkey = evp_pkey_load_pem_file(srv, s->ssl_pemfile->ptr))) return -1;
648 if (!X509_check_private_key(s->ssl_pemfile_x509, s->ssl_pemfile_pkey)) {
649 log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:",
650 "Private key does not match the certificate public key, reason:",
651 ERR_error_string(ERR_get_error(), NULL),
652 s->ssl_pemfile);
653 return -1;
656 return 0;
658 #endif
660 int network_init(server *srv) {
661 buffer *b;
662 size_t i, j;
663 network_backend_t backend;
665 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
666 #ifndef OPENSSL_NO_ECDH
667 EC_KEY *ecdh;
668 int nid;
669 #endif
670 #endif
672 #ifdef USE_OPENSSL
673 # ifndef OPENSSL_NO_DH
674 DH *dh;
675 # endif
676 BIO *bio;
678 /* 1024-bit MODP Group with 160-bit prime order subgroup (RFC5114)
679 * -----BEGIN DH PARAMETERS-----
680 * MIIBDAKBgQCxC4+WoIDgHd6S3l6uXVTsUsmfvPsGo8aaap3KUtI7YWBz4oZ1oj0Y
681 * mDjvHi7mUsAT7LSuqQYRIySXXDzUm4O/rMvdfZDEvXCYSI6cIZpzck7/1vrlZEc4
682 * +qMaT/VbzMChUa9fDci0vUW/N982XBpl5oz9p21NpwjfH7K8LkpDcQKBgQCk0cvV
683 * w/00EmdlpELvuZkF+BBN0lisUH/WQGz/FCZtMSZv6h5cQVZLd35pD1UE8hMWAhe0
684 * sBuIal6RVH+eJ0n01/vX07mpLuGQnQ0iY/gKdqaiTAh6CR9THb8KAWm2oorWYqTR
685 * jnOvoy13nVkY0IvIhY9Nzvl8KiSFXm7rIrOy5QICAKA=
686 * -----END DH PARAMETERS-----
689 static const unsigned char dh1024_p[]={
690 0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E,
691 0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6,
692 0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86,
693 0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0,
694 0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C,
695 0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70,
696 0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA,
697 0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0,
698 0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF,
699 0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08,
700 0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71,
703 static const unsigned char dh1024_g[]={
704 0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42,
705 0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F,
706 0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E,
707 0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13,
708 0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F,
709 0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1,
710 0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08,
711 0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A,
712 0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59,
713 0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24,
714 0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5,
716 #endif
718 struct nb_map {
719 network_backend_t nb;
720 const char *name;
721 } network_backends[] = {
722 /* lowest id wins */
723 #if defined USE_SENDFILE
724 { NETWORK_BACKEND_SENDFILE, "sendfile" },
725 #endif
726 #if defined USE_LINUX_SENDFILE
727 { NETWORK_BACKEND_SENDFILE, "linux-sendfile" },
728 #endif
729 #if defined USE_FREEBSD_SENDFILE
730 { NETWORK_BACKEND_SENDFILE, "freebsd-sendfile" },
731 #endif
732 #if defined USE_SOLARIS_SENDFILEV
733 { NETWORK_BACKEND_SENDFILE, "solaris-sendfilev" },
734 #endif
735 #if defined USE_WRITEV
736 { NETWORK_BACKEND_WRITEV, "writev" },
737 #endif
738 { NETWORK_BACKEND_WRITE, "write" },
739 { NETWORK_BACKEND_UNSET, NULL }
742 #ifdef USE_OPENSSL
743 /* load SSL certificates */
744 for (i = 0; i < srv->config_context->used; i++) {
745 specific_config *s = srv->config_storage[i];
746 #ifndef SSL_OP_NO_COMPRESSION
747 # define SSL_OP_NO_COMPRESSION 0
748 #endif
749 #ifndef SSL_MODE_RELEASE_BUFFERS /* OpenSSL >= 1.0.0 */
750 #define SSL_MODE_RELEASE_BUFFERS 0
751 #endif
752 long ssloptions =
753 SSL_OP_ALL | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_NO_COMPRESSION;
755 if (buffer_string_is_empty(s->ssl_pemfile) && buffer_string_is_empty(s->ssl_ca_file)) continue;
757 if (srv->ssl_is_init == 0) {
758 SSL_load_error_strings();
759 SSL_library_init();
760 OpenSSL_add_all_algorithms();
761 srv->ssl_is_init = 1;
763 if (0 == RAND_status()) {
764 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
765 "not enough entropy in the pool");
766 return -1;
770 if (!buffer_string_is_empty(s->ssl_pemfile)) {
771 #ifdef OPENSSL_NO_TLSEXT
772 data_config *dc = (data_config *)srv->config_context->data[i];
773 if (COMP_HTTP_HOST == dc->comp) {
774 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
775 "can't use ssl.pemfile with $HTTP[\"host\"], openssl version does not support TLS extensions");
776 return -1;
778 #endif
779 if (network_openssl_load_pemfile(srv, i)) return -1;
783 if (!buffer_string_is_empty(s->ssl_ca_file)) {
784 s->ssl_ca_file_cert_names = SSL_load_client_CA_file(s->ssl_ca_file->ptr);
785 if (NULL == s->ssl_ca_file_cert_names) {
786 log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
787 ERR_error_string(ERR_get_error(), NULL), s->ssl_ca_file);
791 if (buffer_string_is_empty(s->ssl_pemfile) || !s->ssl_enabled) continue;
793 if (NULL == (s->ssl_ctx = SSL_CTX_new(SSLv23_server_method()))) {
794 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
795 ERR_error_string(ERR_get_error(), NULL));
796 return -1;
799 /* completely useless identifier; required for client cert verification to work with sessions */
800 if (0 == SSL_CTX_set_session_id_context(s->ssl_ctx, (const unsigned char*) CONST_STR_LEN("lighttpd"))) {
801 log_error_write(srv, __FILE__, __LINE__, "ss:s", "SSL:",
802 "failed to set session context",
803 ERR_error_string(ERR_get_error(), NULL));
804 return -1;
807 if (s->ssl_empty_fragments) {
808 #ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
809 ssloptions &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
810 #else
811 ssloptions &= ~0x00000800L; /* hardcode constant */
812 log_error_write(srv, __FILE__, __LINE__, "ss", "WARNING: SSL:",
813 "'insert empty fragments' not supported by the openssl version used to compile lighttpd with");
814 #endif
817 SSL_CTX_set_options(s->ssl_ctx, ssloptions);
818 SSL_CTX_set_info_callback(s->ssl_ctx, ssl_info_callback);
820 if (!s->ssl_use_sslv2) {
821 /* disable SSLv2 */
822 if ((SSL_OP_NO_SSLv2 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv2)) != SSL_OP_NO_SSLv2) {
823 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
824 ERR_error_string(ERR_get_error(), NULL));
825 return -1;
829 if (!s->ssl_use_sslv3) {
830 /* disable SSLv3 */
831 if ((SSL_OP_NO_SSLv3 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv3)) != SSL_OP_NO_SSLv3) {
832 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
833 ERR_error_string(ERR_get_error(), NULL));
834 return -1;
838 if (!buffer_string_is_empty(s->ssl_cipher_list)) {
839 /* Disable support for low encryption ciphers */
840 if (SSL_CTX_set_cipher_list(s->ssl_ctx, s->ssl_cipher_list->ptr) != 1) {
841 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
842 ERR_error_string(ERR_get_error(), NULL));
843 return -1;
846 if (s->ssl_honor_cipher_order) {
847 SSL_CTX_set_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
851 #ifndef OPENSSL_NO_DH
852 /* Support for Diffie-Hellman key exchange */
853 if (!buffer_string_is_empty(s->ssl_dh_file)) {
854 /* DH parameters from file */
855 bio = BIO_new_file((char *) s->ssl_dh_file->ptr, "r");
856 if (bio == NULL) {
857 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to open file", s->ssl_dh_file->ptr);
858 return -1;
860 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
861 BIO_free(bio);
862 if (dh == NULL) {
863 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: PEM_read_bio_DHparams failed", s->ssl_dh_file->ptr);
864 return -1;
866 } else {
867 BIGNUM *dh_p, *dh_g;
868 /* Default DH parameters from RFC5114 */
869 dh = DH_new();
870 if (dh == NULL) {
871 log_error_write(srv, __FILE__, __LINE__, "s", "SSL: DH_new () failed");
872 return -1;
874 dh_p = BN_bin2bn(dh1024_p,sizeof(dh1024_p), NULL);
875 dh_g = BN_bin2bn(dh1024_g,sizeof(dh1024_g), NULL);
876 if ((dh_p == NULL) || (dh_g == NULL)) {
877 DH_free(dh);
878 log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BN_bin2bn () failed");
879 return -1;
881 #if OPENSSL_VERSION_NUMBER < 0x10100000L \
882 || defined(LIBRESSL_VERSION_NUMBER)
883 dh->p = dh_p;
884 dh->g = dh_g;
885 dh->length = 160;
886 #else
887 DH_set0_pqg(dh, dh_p, NULL, dh_g);
888 DH_set_length(dh, 160);
889 #endif
891 SSL_CTX_set_tmp_dh(s->ssl_ctx,dh);
892 SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_DH_USE);
893 DH_free(dh);
894 #else
895 if (!buffer_string_is_empty(s->ssl_dh_file)) {
896 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: openssl compiled without DH support, can't load parameters from", s->ssl_dh_file->ptr);
898 #endif
900 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
901 #ifndef OPENSSL_NO_ECDH
902 /* Support for Elliptic-Curve Diffie-Hellman key exchange */
903 if (!buffer_string_is_empty(s->ssl_ec_curve)) {
904 /* OpenSSL only supports the "named curves" from RFC 4492, section 5.1.1. */
905 nid = OBJ_sn2nid((char *) s->ssl_ec_curve->ptr);
906 if (nid == 0) {
907 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unknown curve name", s->ssl_ec_curve->ptr);
908 return -1;
910 } else {
911 /* Default curve */
912 nid = OBJ_sn2nid("prime256v1");
914 ecdh = EC_KEY_new_by_curve_name(nid);
915 if (ecdh == NULL) {
916 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to create curve", s->ssl_ec_curve->ptr);
917 return -1;
919 SSL_CTX_set_tmp_ecdh(s->ssl_ctx,ecdh);
920 SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_ECDH_USE);
921 EC_KEY_free(ecdh);
922 #endif
923 #endif
925 /* load all ssl.ca-files specified in the config into each SSL_CTX to be prepared for SNI */
926 for (j = 0; j < srv->config_context->used; j++) {
927 specific_config *s1 = srv->config_storage[j];
929 if (!buffer_string_is_empty(s1->ssl_ca_file)) {
930 if (1 != SSL_CTX_load_verify_locations(s->ssl_ctx, s1->ssl_ca_file->ptr, NULL)) {
931 log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
932 ERR_error_string(ERR_get_error(), NULL), s1->ssl_ca_file);
933 return -1;
938 if (s->ssl_verifyclient) {
939 if (NULL == s->ssl_ca_file_cert_names) {
940 log_error_write(srv, __FILE__, __LINE__, "s",
941 "SSL: You specified ssl.verifyclient.activate but no ca_file"
943 return -1;
945 SSL_CTX_set_client_CA_list(s->ssl_ctx, SSL_dup_CA_list(s->ssl_ca_file_cert_names));
946 SSL_CTX_set_verify(
947 s->ssl_ctx,
948 SSL_VERIFY_PEER | (s->ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0),
949 NULL
951 SSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth);
954 if (1 != SSL_CTX_use_certificate(s->ssl_ctx, s->ssl_pemfile_x509)) {
955 log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
956 ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile);
957 return -1;
960 if (1 != SSL_CTX_use_PrivateKey(s->ssl_ctx, s->ssl_pemfile_pkey)) {
961 log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
962 ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile);
963 return -1;
966 if (SSL_CTX_check_private_key(s->ssl_ctx) != 1) {
967 log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:",
968 "Private key does not match the certificate public key, reason:",
969 ERR_error_string(ERR_get_error(), NULL),
970 s->ssl_pemfile);
971 return -1;
973 SSL_CTX_set_default_read_ahead(s->ssl_ctx, 1);
974 SSL_CTX_set_mode(s->ssl_ctx, SSL_CTX_get_mode(s->ssl_ctx)
975 | SSL_MODE_ENABLE_PARTIAL_WRITE
976 | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
977 | SSL_MODE_RELEASE_BUFFERS);
979 # ifndef OPENSSL_NO_TLSEXT
980 if (!SSL_CTX_set_tlsext_servername_callback(s->ssl_ctx, network_ssl_servername_callback) ||
981 !SSL_CTX_set_tlsext_servername_arg(s->ssl_ctx, srv)) {
982 log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
983 "failed to initialize TLS servername callback, openssl library does not support TLS servername extension");
984 return -1;
986 # endif
988 #endif
990 b = buffer_init();
992 buffer_copy_buffer(b, srv->srvconf.bindhost);
993 buffer_append_string_len(b, CONST_STR_LEN(":"));
994 buffer_append_int(b, srv->srvconf.port);
996 if (0 != network_server_init(srv, b, srv->config_storage[0])) {
997 buffer_free(b);
998 return -1;
1000 buffer_free(b);
1002 #ifdef USE_OPENSSL
1003 srv->network_ssl_backend_write = network_write_chunkqueue_openssl;
1004 #endif
1006 /* get a usefull default */
1007 backend = network_backends[0].nb;
1009 /* match name against known types */
1010 if (!buffer_string_is_empty(srv->srvconf.network_backend)) {
1011 for (i = 0; network_backends[i].name; i++) {
1012 /**/
1013 if (buffer_is_equal_string(srv->srvconf.network_backend, network_backends[i].name, strlen(network_backends[i].name))) {
1014 backend = network_backends[i].nb;
1015 break;
1018 if (NULL == network_backends[i].name) {
1019 /* we don't know it */
1021 log_error_write(srv, __FILE__, __LINE__, "sb",
1022 "server.network-backend has a unknown value:",
1023 srv->srvconf.network_backend);
1025 return -1;
1029 switch(backend) {
1030 case NETWORK_BACKEND_WRITE:
1031 srv->network_backend_write = network_write_chunkqueue_write;
1032 break;
1033 #if defined(USE_WRITEV)
1034 case NETWORK_BACKEND_WRITEV:
1035 srv->network_backend_write = network_write_chunkqueue_writev;
1036 break;
1037 #endif
1038 #if defined(USE_SENDFILE)
1039 case NETWORK_BACKEND_SENDFILE:
1040 srv->network_backend_write = network_write_chunkqueue_sendfile;
1041 break;
1042 #endif
1043 default:
1044 return -1;
1047 /* check for $SERVER["socket"] */
1048 for (i = 1; i < srv->config_context->used; i++) {
1049 data_config *dc = (data_config *)srv->config_context->data[i];
1050 specific_config *s = srv->config_storage[i];
1052 /* not our stage */
1053 if (COMP_SERVER_SOCKET != dc->comp) continue;
1055 if (dc->cond != CONFIG_COND_EQ) continue;
1057 /* check if we already know this socket,
1058 * if yes, don't init it */
1059 for (j = 0; j < srv->srv_sockets.used; j++) {
1060 if (buffer_is_equal(srv->srv_sockets.ptr[j]->srv_token, dc->string)) {
1061 break;
1065 if (j == srv->srv_sockets.used) {
1066 if (0 != network_server_init(srv, dc->string, s)) return -1;
1070 return 0;
1073 int network_register_fdevents(server *srv) {
1074 size_t i;
1076 if (-1 == fdevent_reset(srv->ev)) {
1077 return -1;
1080 if (srv->sockets_disabled) return 0; /* lighttpd -1 (one-shot mode) */
1082 /* register fdevents after reset */
1083 for (i = 0; i < srv->srv_sockets.used; i++) {
1084 server_socket *srv_socket = srv->srv_sockets.ptr[i];
1086 fdevent_register(srv->ev, srv_socket->fd, network_server_handle_fdevent, srv_socket);
1087 fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, FDEVENT_IN);
1089 return 0;
1092 int network_write_chunkqueue(server *srv, connection *con, chunkqueue *cq, off_t max_bytes) {
1093 int ret = -1;
1094 off_t written = 0;
1095 #ifdef TCP_CORK
1096 int corked = 0;
1097 #endif
1098 server_socket *srv_socket = con->srv_socket;
1100 if (con->conf.global_kbytes_per_second) {
1101 off_t limit = con->conf.global_kbytes_per_second * 1024 - *(con->conf.global_bytes_per_second_cnt_ptr);
1102 if (limit <= 0) {
1103 /* we reached the global traffic limit */
1104 con->traffic_limit_reached = 1;
1106 return 1;
1107 } else {
1108 if (max_bytes > limit) max_bytes = limit;
1112 if (con->conf.kbytes_per_second) {
1113 off_t limit = con->conf.kbytes_per_second * 1024 - con->bytes_written_cur_second;
1114 if (limit <= 0) {
1115 /* we reached the traffic limit */
1116 con->traffic_limit_reached = 1;
1118 return 1;
1119 } else {
1120 if (max_bytes > limit) max_bytes = limit;
1124 written = cq->bytes_out;
1126 #ifdef TCP_CORK
1127 /* Linux: put a cork into the socket as we want to combine the write() calls
1128 * but only if we really have multiple chunks
1130 if (cq->first && cq->first->next) {
1131 corked = 1;
1132 (void)setsockopt(con->fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
1134 #endif
1136 if (srv_socket->is_ssl) {
1137 #ifdef USE_OPENSSL
1138 ret = srv->network_ssl_backend_write(srv, con, con->ssl, cq, max_bytes);
1139 #endif
1140 } else {
1141 ret = srv->network_backend_write(srv, con, con->fd, cq, max_bytes);
1144 if (ret >= 0) {
1145 chunkqueue_remove_finished_chunks(cq);
1146 ret = chunkqueue_is_empty(cq) ? 0 : 1;
1149 #ifdef TCP_CORK
1150 if (corked) {
1151 corked = 0;
1152 (void)setsockopt(con->fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
1154 #endif
1156 written = cq->bytes_out - written;
1157 con->bytes_written += written;
1158 con->bytes_written_cur_second += written;
1160 *(con->conf.global_bytes_per_second_cnt_ptr) += written;
1162 return ret;