#include "first.h"
#include "network.h"
#include "fdevent.h"
#include "log.h"
#include "connections.h"
#include "plugin.h"
#include "joblist.h"
#include "configfile.h"
#include "network_backends.h"
#include "sys-mmap.h"
#include "sys-socket.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#ifdef USE_OPENSSL
# include <openssl/ssl.h>
# include <openssl/err.h>
# include <openssl/rand.h>
# ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
# endif
# include <openssl/bn.h>
# if OPENSSL_VERSION_NUMBER >= 0x0090800fL
# ifndef OPENSSL_NO_ECDH
# include <openssl/ecdh.h>
# endif
# endif
#endif
#ifdef USE_OPENSSL
static void ssl_info_callback(const SSL *ssl, int where, int ret) {
UNUSED(ret);
if (0 != (where & SSL_CB_HANDSHAKE_START)) {
connection *con = SSL_get_app_data(ssl);
++con->renegotiations;
}
}
#endif
void
network_accept_tcp_nagle_disable (const int fd)
{
static int noinherit_tcpnodelay = -1;
int opt;
if (!noinherit_tcpnodelay) /* TCP_NODELAY inherited from listen socket */
return;
if (noinherit_tcpnodelay < 0) {
socklen_t optlen = sizeof(opt);
if (0 == getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen)) {
noinherit_tcpnodelay = !opt;
if (opt) /* TCP_NODELAY inherited from listen socket */
return;
}
}
opt = 1;
(void)setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
}
static handler_t network_server_handle_fdevent(server *srv, void *context, int revents) {
server_socket *srv_socket = (server_socket *)context;
connection *con;
int loops = 0;
UNUSED(context);
if (0 == (revents & FDEVENT_IN)) {
log_error_write(srv, __FILE__, __LINE__, "sdd",
"strange event for server socket",
srv_socket->fd,
revents);
return HANDLER_ERROR;
}
/* accept()s at most 100 connections directly
*
* we jump out after 100 to give the waiting connections a chance */
for (loops = 0; loops < 100 && NULL != (con = connection_accept(srv, srv_socket)); loops++) {
connection_state_machine(srv, con);
}
return HANDLER_GO_ON;
}
#if defined USE_OPENSSL && ! defined OPENSSL_NO_TLSEXT
static int network_ssl_servername_callback(SSL *ssl, int *al, server *srv) {
const char *servername;
connection *con = (connection *) SSL_get_app_data(ssl);
UNUSED(al);
buffer_copy_string(con->uri.scheme, "https");
if (NULL == (servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name))) {
#if 0
/* this "error" just means the client didn't support it */
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"failed to get TLS server name");
#endif
return SSL_TLSEXT_ERR_NOACK;
}
buffer_copy_string(con->tlsext_server_name, servername);
buffer_to_lower(con->tlsext_server_name);
/* Sometimes this is still set, confusing COMP_HTTP_HOST */
buffer_reset(con->uri.authority);
config_cond_cache_reset(srv, con);
config_setup_connection(srv, con);
con->conditional_is_valid[COMP_SERVER_SOCKET] = 1;
con->conditional_is_valid[COMP_HTTP_SCHEME] = 1;
con->conditional_is_valid[COMP_HTTP_HOST] = 1;
config_patch_connection(srv, con);
if (NULL == con->conf.ssl_pemfile_x509 || NULL == con->conf.ssl_pemfile_pkey) {
/* x509/pkey available <=> pemfile was set <=> pemfile got patched: so this should never happen, unless you nest $SERVER["socket"] */
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
"no certificate/private key for TLS server name", con->tlsext_server_name);
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
/* first set certificate! setting private key checks whether certificate matches it */
if (!SSL_use_certificate(ssl, con->conf.ssl_pemfile_x509)) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"failed to set certificate for TLS server name", con->tlsext_server_name,
ERR_error_string(ERR_get_error(), NULL));
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
if (!SSL_use_PrivateKey(ssl, con->conf.ssl_pemfile_pkey)) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"failed to set private key for TLS server name", con->tlsext_server_name,
ERR_error_string(ERR_get_error(), NULL));
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
if (con->conf.ssl_verifyclient) {
if (NULL == con->conf.ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "ssb:s", "SSL:",
"can't verify client without ssl.ca-file for TLS server name", con->tlsext_server_name,
ERR_error_string(ERR_get_error(), NULL));
return SSL_TLSEXT_ERR_ALERT_FATAL;
}
SSL_set_client_CA_list(ssl, SSL_dup_CA_list(con->conf.ssl_ca_file_cert_names));
/* forcing verification here is really not that useful - a client could just connect without SNI */
SSL_set_verify(
ssl,
SSL_VERIFY_PEER | (con->conf.ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0),
NULL
);
SSL_set_verify_depth(ssl, con->conf.ssl_verifyclient_depth);
} else {
SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL);
}
return SSL_TLSEXT_ERR_OK;
}
#endif
static int network_server_init(server *srv, buffer *host_token, specific_config *s) {
int val;
socklen_t addr_len;
server_socket *srv_socket;
unsigned int port = 0;
const char *host;
buffer *b;
int err;
#ifdef __WIN32
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
/* Tell the user that we could not find a usable */
/* WinSock DLL. */
return -1;
}
#endif
err = -1;
srv_socket = calloc(1, sizeof(*srv_socket));
force_assert(NULL != srv_socket);
srv_socket->addr.plain.sa_family = AF_INET; /* default */
srv_socket->fd = -1;
srv_socket->fde_ndx = -1;
srv_socket->srv_token = buffer_init();
buffer_copy_buffer(srv_socket->srv_token, host_token);
b = buffer_init();
buffer_copy_buffer(b, host_token);
host = b->ptr;
if (host[0] == '/') {
/* host is a unix-domain-socket */
#ifdef HAVE_SYS_UN_H
srv_socket->addr.plain.sa_family = AF_UNIX;
#else
log_error_write(srv, __FILE__, __LINE__, "s",
"ERROR: Unix Domain sockets are not supported.");
goto error_free_socket;
#endif
} else {
/* ipv4:port
* [ipv6]:port
*/
size_t len = buffer_string_length(b);
char *sp = NULL;
if (0 == len) {
log_error_write(srv, __FILE__, __LINE__, "s", "value of $SERVER[\"socket\"] must not be empty");
goto error_free_socket;
}
if ((b->ptr[0] == '[' && b->ptr[len-1] == ']') || NULL == (sp = strrchr(b->ptr, ':'))) {
/* use server.port if set in config, or else default from config_set_defaults() */
port = srv->srvconf.port;
sp = b->ptr + len; /* point to '\0' at end of string so end of IPv6 address can be found below */
} else {
/* found ip:port separator at *sp; port doesn't end in ']', so *sp hopefully doesn't split an IPv6 address */
*sp = '\0';
port = strtol(sp+1, NULL, 10);
}
/* check for [ and ] */
if (b->ptr[0] == '[' && *(sp-1) == ']') {
*(sp-1) = '\0';
host++;
s->use_ipv6 = 1;
}
if (port == 0 || port > 65535) {
log_error_write(srv, __FILE__, __LINE__, "sd", "port not set or out of range:", port);
goto error_free_socket;
}
}
if (*host == '\0') host = NULL;
#ifdef HAVE_IPV6
if (s->use_ipv6) {
srv_socket->addr.plain.sa_family = AF_INET6;
}
#endif
switch(srv_socket->addr.plain.sa_family) {
#ifdef HAVE_IPV6
case AF_INET6:
memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in6));
srv_socket->addr.ipv6.sin6_family = AF_INET6;
if (host == NULL) {
srv_socket->addr.ipv6.sin6_addr = in6addr_any;
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");
} else {
struct addrinfo hints, *res;
int r;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
if (0 != (r = getaddrinfo(host, NULL, &hints, &res))) {
hints.ai_family = AF_INET;
if (
#ifdef EAI_ADDRFAMILY
EAI_ADDRFAMILY == r &&
#endif
0 == getaddrinfo(host, NULL, &hints, &res)) {
memcpy(&srv_socket->addr.ipv4, res->ai_addr, res->ai_addrlen);
srv_socket->addr.ipv4.sin_family = AF_INET;
srv_socket->addr.ipv4.sin_port = htons(port);
addr_len = sizeof(struct sockaddr_in);
/*assert(addr_len == res->ai_addrlen);*/
freeaddrinfo(res);
break;
}
log_error_write(srv, __FILE__, __LINE__,
"sssss", "getaddrinfo failed: ",
gai_strerror(r), "'", host, "'");
goto error_free_socket;
}
memcpy(&(srv_socket->addr), res->ai_addr, res->ai_addrlen);
freeaddrinfo(res);
}
srv_socket->addr.ipv6.sin6_port = htons(port);
addr_len = sizeof(struct sockaddr_in6);
break;
#endif
case AF_INET:
memset(&srv_socket->addr, 0, sizeof(struct sockaddr_in));
srv_socket->addr.ipv4.sin_family = AF_INET;
if (host == NULL) {
srv_socket->addr.ipv4.sin_addr.s_addr = htonl(INADDR_ANY);
} else {
struct hostent *he;
if (NULL == (he = gethostbyname(host))) {
log_error_write(srv, __FILE__, __LINE__,
"sds", "gethostbyname failed: ",
h_errno, host);
goto error_free_socket;
}
if (he->h_addrtype != AF_INET) {
log_error_write(srv, __FILE__, __LINE__, "sd", "addr-type != AF_INET: ", he->h_addrtype);
goto error_free_socket;
}
if (he->h_length != sizeof(struct in_addr)) {
log_error_write(srv, __FILE__, __LINE__, "sd", "addr-length != sizeof(in_addr): ", he->h_length);
goto error_free_socket;
}
memcpy(&(srv_socket->addr.ipv4.sin_addr.s_addr), he->h_addr_list[0], he->h_length);
}
srv_socket->addr.ipv4.sin_port = htons(port);
addr_len = sizeof(struct sockaddr_in);
break;
#ifdef HAVE_SYS_UN_H
case AF_UNIX:
memset(&srv_socket->addr, 0, sizeof(struct sockaddr_un));
srv_socket->addr.un.sun_family = AF_UNIX;
{
size_t hostlen = strlen(host) + 1;
if (hostlen > sizeof(srv_socket->addr.un.sun_path)) {
log_error_write(srv, __FILE__, __LINE__, "sS", "unix socket filename too long:", host);
goto error_free_socket;
}
memcpy(srv_socket->addr.un.sun_path, host, hostlen);
#if defined(SUN_LEN)
addr_len = SUN_LEN(&srv_socket->addr.un);
#else
/* stevens says: */
addr_len = hostlen + sizeof(srv_socket->addr.un.sun_family);
#endif
}
break;
#endif
default:
goto error_free_socket;
}
if (srv->srvconf.preflight_check) {
err = 0;
goto error_free_socket;
}
if (srv->sockets_disabled) { /* lighttpd -1 (one-shot mode) */
#ifdef USE_OPENSSL
if (s->ssl_enabled) srv_socket->ssl_ctx = s->ssl_ctx;
#endif
goto srv_sockets_append;
}
#ifdef HAVE_SYS_UN_H
if (AF_UNIX == srv_socket->addr.plain.sa_family) {
/* check if the socket exists and try to connect to it. */
force_assert(host); /*(static analysis hint)*/
if (-1 == (srv_socket->fd = socket(srv_socket->addr.plain.sa_family, SOCK_STREAM, 0))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "socket failed:", strerror(errno));
goto error_free_socket;
}
if (0 == connect(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"server socket is still in use:",
host);
goto error_free_socket;
}
/* connect failed */
switch(errno) {
case ECONNREFUSED:
unlink(host);
break;
case ENOENT:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sds",
"testing socket failed:",
host, strerror(errno));
goto error_free_socket;
}
} else
#endif
{
if (-1 == (srv_socket->fd = socket(srv_socket->addr.plain.sa_family, SOCK_STREAM, IPPROTO_TCP))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "socket failed:", strerror(errno));
goto error_free_socket;
}
#ifdef HAVE_IPV6
if (AF_INET6 == srv_socket->addr.plain.sa_family
&& host != NULL) {
if (s->set_v6only) {
val = 1;
if (-1 == setsockopt(srv_socket->fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(IPV6_V6ONLY) failed:", strerror(errno));
goto error_free_socket;
}
} else {
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");
}
}
#endif
}
/* set FD_CLOEXEC now, fdevent_fcntl_set is called later; needed for pipe-logger forks */
fd_close_on_exec(srv_socket->fd);
/* */
srv->cur_fds = srv_socket->fd;
val = 1;
if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(SO_REUSEADDR) failed:", strerror(errno));
goto error_free_socket;
}
if (srv_socket->addr.plain.sa_family != AF_UNIX) {
val = 1;
if (setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)) < 0) {
log_error_write(srv, __FILE__, __LINE__, "ss", "socketsockopt(TCP_NODELAY) failed:", strerror(errno));
goto error_free_socket;
}
}
if (0 != bind(srv_socket->fd, (struct sockaddr *) &(srv_socket->addr), addr_len)) {
switch(srv_socket->addr.plain.sa_family) {
case AF_UNIX:
log_error_write(srv, __FILE__, __LINE__, "sds",
"can't bind to socket:",
host, strerror(errno));
break;
default:
log_error_write(srv, __FILE__, __LINE__, "ssds",
"can't bind to port:",
host, port, strerror(errno));
break;
}
goto error_free_socket;
}
if (-1 == listen(srv_socket->fd, s->listen_backlog)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "listen failed: ", strerror(errno));
goto error_free_socket;
}
if (s->ssl_enabled) {
#ifdef USE_OPENSSL
if (NULL == (srv_socket->ssl_ctx = s->ssl_ctx)) {
log_error_write(srv, __FILE__, __LINE__, "s", "ssl.pemfile has to be set");
goto error_free_socket;
}
#else
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"ssl requested but openssl support is not compiled in");
goto error_free_socket;
#endif
#ifdef TCP_DEFER_ACCEPT
} else if (s->defer_accept) {
int v = s->defer_accept;
if (-1 == setsockopt(srv_socket->fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &v, sizeof(v))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "can't set TCP_DEFER_ACCEPT: ", strerror(errno));
}
#endif
#if defined(__FreeBSD__) || defined(__NetBSD__) \
|| defined(__OpenBSD__) || defined(__DragonflyBSD__)
} else if (!buffer_is_empty(s->bsd_accept_filter)
&& (buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("httpready"))
|| buffer_is_equal_string(s->bsd_accept_filter, CONST_STR_LEN("dataready")))) {
#ifdef SO_ACCEPTFILTER
/* FreeBSD accf_http filter */
struct accept_filter_arg afa;
memset(&afa, 0, sizeof(afa));
strncpy(afa.af_name, s->bsd_accept_filter->ptr, sizeof(afa.af_name));
if (setsockopt(srv_socket->fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa)) < 0) {
if (errno != ENOENT) {
log_error_write(srv, __FILE__, __LINE__, "SBss", "can't set accept-filter '", s->bsd_accept_filter, "':", strerror(errno));
}
}
#endif
#endif
}
srv_sockets_append:
srv_socket->is_ssl = s->ssl_enabled;
if (srv->srv_sockets.size == 0) {
srv->srv_sockets.size = 4;
srv->srv_sockets.used = 0;
srv->srv_sockets.ptr = malloc(srv->srv_sockets.size * sizeof(server_socket*));
force_assert(NULL != srv->srv_sockets.ptr);
} else if (srv->srv_sockets.used == srv->srv_sockets.size) {
srv->srv_sockets.size += 4;
srv->srv_sockets.ptr = realloc(srv->srv_sockets.ptr, srv->srv_sockets.size * sizeof(server_socket*));
force_assert(NULL != srv->srv_sockets.ptr);
}
srv->srv_sockets.ptr[srv->srv_sockets.used++] = srv_socket;
buffer_free(b);
return 0;
error_free_socket:
if (srv_socket->fd != -1) {
/* check if server fd are already registered */
if (srv_socket->fde_ndx != -1) {
fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
fdevent_unregister(srv->ev, srv_socket->fd);
}
close(srv_socket->fd);
}
buffer_free(srv_socket->srv_token);
free(srv_socket);
buffer_free(b);
return err; /* -1 if error; 0 if srv->srvconf.preflight_check successful */
}
int network_close(server *srv) {
size_t i;
for (i = 0; i < srv->srv_sockets.used; i++) {
server_socket *srv_socket = srv->srv_sockets.ptr[i];
if (srv_socket->fd != -1) {
/* check if server fd are already registered */
if (srv_socket->fde_ndx != -1) {
fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
fdevent_unregister(srv->ev, srv_socket->fd);
}
close(srv_socket->fd);
}
buffer_free(srv_socket->srv_token);
free(srv_socket);
}
free(srv->srv_sockets.ptr);
return 0;
}
typedef enum {
NETWORK_BACKEND_UNSET,
NETWORK_BACKEND_WRITE,
NETWORK_BACKEND_WRITEV,
NETWORK_BACKEND_SENDFILE,
} network_backend_t;
#ifdef USE_OPENSSL
static X509* x509_load_pem_file(server *srv, const char *file) {
BIO *in;
X509 *x = NULL;
in = BIO_new(BIO_s_file());
if (NULL == in) {
log_error_write(srv, __FILE__, __LINE__, "S", "SSL: BIO_new(BIO_s_file()) failed");
goto error;
}
if (BIO_read_filename(in,file) <= 0) {
log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: BIO_read_filename('", file,"') failed");
goto error;
}
x = PEM_read_bio_X509(in, NULL, NULL, NULL);
if (NULL == x) {
log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: couldn't read X509 certificate from '", file,"'");
goto error;
}
BIO_free(in);
return x;
error:
if (NULL != in) BIO_free(in);
return NULL;
}
static EVP_PKEY* evp_pkey_load_pem_file(server *srv, const char *file) {
BIO *in;
EVP_PKEY *x = NULL;
in=BIO_new(BIO_s_file());
if (NULL == in) {
log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BIO_new(BIO_s_file()) failed");
goto error;
}
if (BIO_read_filename(in,file) <= 0) {
log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: BIO_read_filename('", file,"') failed");
goto error;
}
x = PEM_read_bio_PrivateKey(in, NULL, NULL, NULL);
if (NULL == x) {
log_error_write(srv, __FILE__, __LINE__, "SSS", "SSL: couldn't read private key from '", file,"'");
goto error;
}
BIO_free(in);
return x;
error:
if (NULL != in) BIO_free(in);
return NULL;
}
static int network_openssl_load_pemfile(server *srv, size_t ndx) {
specific_config *s = srv->config_storage[ndx];
#ifdef OPENSSL_NO_TLSEXT
{
data_config *dc = (data_config *)srv->config_context->data[ndx];
if ((ndx > 0 && (COMP_SERVER_SOCKET != dc->comp || dc->cond != CONFIG_COND_EQ))
|| !s->ssl_enabled) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"ssl.pemfile only works in SSL socket binding context as openssl version does not support TLS extensions");
return -1;
}
}
#endif
if (NULL == (s->ssl_pemfile_x509 = x509_load_pem_file(srv, s->ssl_pemfile->ptr))) return -1;
if (NULL == (s->ssl_pemfile_pkey = evp_pkey_load_pem_file(srv, s->ssl_pemfile->ptr))) return -1;
if (!X509_check_private_key(s->ssl_pemfile_x509, s->ssl_pemfile_pkey)) {
log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:",
"Private key does not match the certificate public key, reason:",
ERR_error_string(ERR_get_error(), NULL),
s->ssl_pemfile);
return -1;
}
return 0;
}
#endif
int network_init(server *srv) {
buffer *b;
size_t i, j;
network_backend_t backend;
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
EC_KEY *ecdh;
int nid;
#endif
#endif
#ifdef USE_OPENSSL
# ifndef OPENSSL_NO_DH
DH *dh;
# endif
BIO *bio;
/* 1024-bit MODP Group with 160-bit prime order subgroup (RFC5114)
* -----BEGIN DH PARAMETERS-----
* MIIBDAKBgQCxC4+WoIDgHd6S3l6uXVTsUsmfvPsGo8aaap3KUtI7YWBz4oZ1oj0Y
* mDjvHi7mUsAT7LSuqQYRIySXXDzUm4O/rMvdfZDEvXCYSI6cIZpzck7/1vrlZEc4
* +qMaT/VbzMChUa9fDci0vUW/N982XBpl5oz9p21NpwjfH7K8LkpDcQKBgQCk0cvV
* w/00EmdlpELvuZkF+BBN0lisUH/WQGz/FCZtMSZv6h5cQVZLd35pD1UE8hMWAhe0
* sBuIal6RVH+eJ0n01/vX07mpLuGQnQ0iY/gKdqaiTAh6CR9THb8KAWm2oorWYqTR
* jnOvoy13nVkY0IvIhY9Nzvl8KiSFXm7rIrOy5QICAKA=
* -----END DH PARAMETERS-----
*/
static const unsigned char dh1024_p[]={
0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E,
0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6,
0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86,
0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0,
0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C,
0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70,
0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA,
0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0,
0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF,
0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08,
0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71,
};
static const unsigned char dh1024_g[]={
0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42,
0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F,
0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E,
0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13,
0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F,
0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1,
0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08,
0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A,
0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59,
0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24,
0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5,
};
#endif
struct nb_map {
network_backend_t nb;
const char *name;
} network_backends[] = {
/* lowest id wins */
#if defined USE_SENDFILE
{ NETWORK_BACKEND_SENDFILE, "sendfile" },
#endif
#if defined USE_LINUX_SENDFILE
{ NETWORK_BACKEND_SENDFILE, "linux-sendfile" },
#endif
#if defined USE_FREEBSD_SENDFILE
{ NETWORK_BACKEND_SENDFILE, "freebsd-sendfile" },
#endif
#if defined USE_SOLARIS_SENDFILEV
{ NETWORK_BACKEND_SENDFILE, "solaris-sendfilev" },
#endif
#if defined USE_WRITEV
{ NETWORK_BACKEND_WRITEV, "writev" },
#endif
{ NETWORK_BACKEND_WRITE, "write" },
{ NETWORK_BACKEND_UNSET, NULL }
};
#ifdef USE_OPENSSL
/* load SSL certificates */
for (i = 0; i < srv->config_context->used; i++) {
specific_config *s = srv->config_storage[i];
#ifndef SSL_OP_NO_COMPRESSION
# define SSL_OP_NO_COMPRESSION 0
#endif
#ifndef SSL_MODE_RELEASE_BUFFERS /* OpenSSL >= 1.0.0 */
#define SSL_MODE_RELEASE_BUFFERS 0
#endif
long ssloptions =
SSL_OP_ALL | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_NO_COMPRESSION;
if (buffer_string_is_empty(s->ssl_pemfile) && buffer_string_is_empty(s->ssl_ca_file)) continue;
if (srv->ssl_is_init == 0) {
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
srv->ssl_is_init = 1;
if (0 == RAND_status()) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"not enough entropy in the pool");
return -1;
}
}
if (!buffer_string_is_empty(s->ssl_pemfile)) {
#ifdef OPENSSL_NO_TLSEXT
data_config *dc = (data_config *)srv->config_context->data[i];
if (COMP_HTTP_HOST == dc->comp) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"can't use ssl.pemfile with $HTTP[\"host\"], openssl version does not support TLS extensions");
return -1;
}
#endif
if (network_openssl_load_pemfile(srv, i)) return -1;
}
if (!buffer_string_is_empty(s->ssl_ca_file)) {
s->ssl_ca_file_cert_names = SSL_load_client_CA_file(s->ssl_ca_file->ptr);
if (NULL == s->ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_ca_file);
}
}
if (buffer_string_is_empty(s->ssl_pemfile) || !s->ssl_enabled) continue;
if (NULL == (s->ssl_ctx = SSL_CTX_new(SSLv23_server_method()))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
/* completely useless identifier; required for client cert verification to work with sessions */
if (0 == SSL_CTX_set_session_id_context(s->ssl_ctx, (const unsigned char*) CONST_STR_LEN("lighttpd"))) {
log_error_write(srv, __FILE__, __LINE__, "ss:s", "SSL:",
"failed to set session context",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
if (s->ssl_empty_fragments) {
#ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
ssloptions &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
#else
ssloptions &= ~0x00000800L; /* hardcode constant */
log_error_write(srv, __FILE__, __LINE__, "ss", "WARNING: SSL:",
"'insert empty fragments' not supported by the openssl version used to compile lighttpd with");
#endif
}
SSL_CTX_set_options(s->ssl_ctx, ssloptions);
SSL_CTX_set_info_callback(s->ssl_ctx, ssl_info_callback);
if (!s->ssl_use_sslv2) {
/* disable SSLv2 */
if ((SSL_OP_NO_SSLv2 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv2)) != SSL_OP_NO_SSLv2) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
}
if (!s->ssl_use_sslv3) {
/* disable SSLv3 */
if ((SSL_OP_NO_SSLv3 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv3)) != SSL_OP_NO_SSLv3) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
}
if (!buffer_string_is_empty(s->ssl_cipher_list)) {
/* Disable support for low encryption ciphers */
if (SSL_CTX_set_cipher_list(s->ssl_ctx, s->ssl_cipher_list->ptr) != 1) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
if (s->ssl_honor_cipher_order) {
SSL_CTX_set_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
}
}
#ifndef OPENSSL_NO_DH
/* Support for Diffie-Hellman key exchange */
if (!buffer_string_is_empty(s->ssl_dh_file)) {
/* DH parameters from file */
bio = BIO_new_file((char *) s->ssl_dh_file->ptr, "r");
if (bio == NULL) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to open file", s->ssl_dh_file->ptr);
return -1;
}
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
BIO_free(bio);
if (dh == NULL) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: PEM_read_bio_DHparams failed", s->ssl_dh_file->ptr);
return -1;
}
} else {
BIGNUM *dh_p, *dh_g;
/* Default DH parameters from RFC5114 */
dh = DH_new();
if (dh == NULL) {
log_error_write(srv, __FILE__, __LINE__, "s", "SSL: DH_new () failed");
return -1;
}
dh_p = BN_bin2bn(dh1024_p,sizeof(dh1024_p), NULL);
dh_g = BN_bin2bn(dh1024_g,sizeof(dh1024_g), NULL);
if ((dh_p == NULL) || (dh_g == NULL)) {
DH_free(dh);
log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BN_bin2bn () failed");
return -1;
}
#if OPENSSL_VERSION_NUMBER < 0x10100000L \
|| defined(LIBRESSL_VERSION_NUMBER)
dh->p = dh_p;
dh->g = dh_g;
dh->length = 160;
#else
DH_set0_pqg(dh, dh_p, NULL, dh_g);
DH_set_length(dh, 160);
#endif
}
SSL_CTX_set_tmp_dh(s->ssl_ctx,dh);
SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_DH_USE);
DH_free(dh);
#else
if (!buffer_string_is_empty(s->ssl_dh_file)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: openssl compiled without DH support, can't load parameters from", s->ssl_dh_file->ptr);
}
#endif
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
/* Support for Elliptic-Curve Diffie-Hellman key exchange */
if (!buffer_string_is_empty(s->ssl_ec_curve)) {
/* OpenSSL only supports the "named curves" from RFC 4492, section 5.1.1. */
nid = OBJ_sn2nid((char *) s->ssl_ec_curve->ptr);
if (nid == 0) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unknown curve name", s->ssl_ec_curve->ptr);
return -1;
}
} else {
/* Default curve */
nid = OBJ_sn2nid("prime256v1");
}
ecdh = EC_KEY_new_by_curve_name(nid);
if (ecdh == NULL) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to create curve", s->ssl_ec_curve->ptr);
return -1;
}
SSL_CTX_set_tmp_ecdh(s->ssl_ctx,ecdh);
SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_ECDH_USE);
EC_KEY_free(ecdh);
#endif
#endif
/* load all ssl.ca-files specified in the config into each SSL_CTX to be prepared for SNI */
for (j = 0; j < srv->config_context->used; j++) {
specific_config *s1 = srv->config_storage[j];
if (!buffer_string_is_empty(s1->ssl_ca_file)) {
if (1 != SSL_CTX_load_verify_locations(s->ssl_ctx, s1->ssl_ca_file->ptr, NULL)) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s1->ssl_ca_file);
return -1;
}
}
}
if (s->ssl_verifyclient) {
if (NULL == s->ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "s",
"SSL: You specified ssl.verifyclient.activate but no ca_file"
);
return -1;
}
SSL_CTX_set_client_CA_list(s->ssl_ctx, SSL_dup_CA_list(s->ssl_ca_file_cert_names));
SSL_CTX_set_verify(
s->ssl_ctx,
SSL_VERIFY_PEER | (s->ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0),
NULL
);
SSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth);
}
if (1 != SSL_CTX_use_certificate(s->ssl_ctx, s->ssl_pemfile_x509)) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile);
return -1;
}
if (1 != SSL_CTX_use_PrivateKey(s->ssl_ctx, s->ssl_pemfile_pkey)) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile);
return -1;
}
if (SSL_CTX_check_private_key(s->ssl_ctx) != 1) {
log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:",
"Private key does not match the certificate public key, reason:",
ERR_error_string(ERR_get_error(), NULL),
s->ssl_pemfile);
return -1;
}
SSL_CTX_set_default_read_ahead(s->ssl_ctx, 1);
SSL_CTX_set_mode(s->ssl_ctx, SSL_CTX_get_mode(s->ssl_ctx)
| SSL_MODE_ENABLE_PARTIAL_WRITE
| SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
| SSL_MODE_RELEASE_BUFFERS);
# ifndef OPENSSL_NO_TLSEXT
if (!SSL_CTX_set_tlsext_servername_callback(s->ssl_ctx, network_ssl_servername_callback) ||
!SSL_CTX_set_tlsext_servername_arg(s->ssl_ctx, srv)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"failed to initialize TLS servername callback, openssl library does not support TLS servername extension");
return -1;
}
# endif
}
#endif
b = buffer_init();
buffer_copy_buffer(b, srv->srvconf.bindhost);
buffer_append_string_len(b, CONST_STR_LEN(":"));
buffer_append_int(b, srv->srvconf.port);
if (0 != network_server_init(srv, b, srv->config_storage[0])) {
buffer_free(b);
return -1;
}
buffer_free(b);
#ifdef USE_OPENSSL
srv->network_ssl_backend_write = network_write_chunkqueue_openssl;
#endif
/* get a usefull default */
backend = network_backends[0].nb;
/* match name against known types */
if (!buffer_string_is_empty(srv->srvconf.network_backend)) {
for (i = 0; network_backends[i].name; i++) {
/**/
if (buffer_is_equal_string(srv->srvconf.network_backend, network_backends[i].name, strlen(network_backends[i].name))) {
backend = network_backends[i].nb;
break;
}
}
if (NULL == network_backends[i].name) {
/* we don't know it */
log_error_write(srv, __FILE__, __LINE__, "sb",
"server.network-backend has a unknown value:",
srv->srvconf.network_backend);
return -1;
}
}
switch(backend) {
case NETWORK_BACKEND_WRITE:
srv->network_backend_write = network_write_chunkqueue_write;
break;
#if defined(USE_WRITEV)
case NETWORK_BACKEND_WRITEV:
srv->network_backend_write = network_write_chunkqueue_writev;
break;
#endif
#if defined(USE_SENDFILE)
case NETWORK_BACKEND_SENDFILE:
srv->network_backend_write = network_write_chunkqueue_sendfile;
break;
#endif
default:
return -1;
}
/* check for $SERVER["socket"] */
for (i = 1; i < srv->config_context->used; i++) {
data_config *dc = (data_config *)srv->config_context->data[i];
specific_config *s = srv->config_storage[i];
/* not our stage */
if (COMP_SERVER_SOCKET != dc->comp) continue;
if (dc->cond != CONFIG_COND_EQ) continue;
/* check if we already know this socket,
* if yes, don't init it */
for (j = 0; j < srv->srv_sockets.used; j++) {
if (buffer_is_equal(srv->srv_sockets.ptr[j]->srv_token, dc->string)) {
break;
}
}
if (j == srv->srv_sockets.used) {
if (0 != network_server_init(srv, dc->string, s)) return -1;
}
}
return 0;
}
int network_register_fdevents(server *srv) {
size_t i;
if (-1 == fdevent_reset(srv->ev)) {
return -1;
}
if (srv->sockets_disabled) return 0; /* lighttpd -1 (one-shot mode) */
/* register fdevents after reset */
for (i = 0; i < srv->srv_sockets.used; i++) {
server_socket *srv_socket = srv->srv_sockets.ptr[i];
fdevent_register(srv->ev, srv_socket->fd, network_server_handle_fdevent, srv_socket);
fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, FDEVENT_IN);
}
return 0;
}
int network_write_chunkqueue(server *srv, connection *con, chunkqueue *cq, off_t max_bytes) {
int ret = -1;
off_t written = 0;
#ifdef TCP_CORK
int corked = 0;
#endif
server_socket *srv_socket = con->srv_socket;
if (con->conf.global_kbytes_per_second) {
off_t limit = con->conf.global_kbytes_per_second * 1024 - *(con->conf.global_bytes_per_second_cnt_ptr);
if (limit <= 0) {
/* we reached the global traffic limit */
con->traffic_limit_reached = 1;
return 1;
} else {
if (max_bytes > limit) max_bytes = limit;
}
}
if (con->conf.kbytes_per_second) {
off_t limit = con->conf.kbytes_per_second * 1024 - con->bytes_written_cur_second;
if (limit <= 0) {
/* we reached the traffic limit */
con->traffic_limit_reached = 1;
return 1;
} else {
if (max_bytes > limit) max_bytes = limit;
}
}
written = cq->bytes_out;
#ifdef TCP_CORK
/* Linux: put a cork into the socket as we want to combine the write() calls
* but only if we really have multiple chunks
*/
if (cq->first && cq->first->next) {
corked = 1;
(void)setsockopt(con->fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
if (srv_socket->is_ssl) {
#ifdef USE_OPENSSL
ret = srv->network_ssl_backend_write(srv, con, con->ssl, cq, max_bytes);
#endif
} else {
ret = srv->network_backend_write(srv, con, con->fd, cq, max_bytes);
}
if (ret >= 0) {
chunkqueue_remove_finished_chunks(cq);
ret = chunkqueue_is_empty(cq) ? 0 : 1;
}
#ifdef TCP_CORK
if (corked) {
corked = 0;
(void)setsockopt(con->fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
written = cq->bytes_out - written;
con->bytes_written += written;
con->bytes_written_cur_second += written;
*(con->conf.global_bytes_per_second_cnt_ptr) += written;
return ret;
}
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