File: [local] / src / usr.sbin / httpd / parse.y (download)
Revision 1.128, Sun Feb 27 20:30:30 2022 UTC (2 years, 3 months ago) by bluhm
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, HEAD
Changes since 1.127: +12 -2 lines
Add gzip-static option to httpd. This allows to deliver precompressed
files with content-encoding gzip.
from prx at si3t dot ch; OK tracey@
|
/* $OpenBSD: parse.y,v 1.128 2022/02/27 20:30:30 bluhm Exp $ */
/*
* Copyright (c) 2020 Matthias Pressfreund <mpfr@fn.de>
* Copyright (c) 2007 - 2015 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@openbsd.org>
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
* Copyright (c) 2001 Theo de Raadt. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
%{
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/ioctl.h>
#include <sys/sockio.h>
#include <sys/time.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdarg.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <ifaddrs.h>
#include <syslog.h>
#include "httpd.h"
#include "http.h"
TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
TAILQ_ENTRY(file) entry;
FILE *stream;
char *name;
size_t ungetpos;
size_t ungetsize;
u_char *ungetbuf;
int eof_reached;
int lineno;
int errors;
} *file, *topfile;
struct file *pushfile(const char *, int);
int popfile(void);
int check_file_secrecy(int, const char *);
int yyparse(void);
int yylex(void);
int yyerror(const char *, ...)
__attribute__((__format__ (printf, 1, 2)))
__attribute__((__nonnull__ (1)));
int kw_cmp(const void *, const void *);
int lookup(char *);
int igetc(void);
int lgetc(int);
void lungetc(int);
int findeol(void);
TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
struct sym {
TAILQ_ENTRY(sym) entry;
int used;
int persist;
char *nam;
char *val;
};
int symset(const char *, const char *, int);
char *symget(const char *);
struct httpd *conf = NULL;
static int errors = 0;
static int loadcfg = 0;
uint32_t last_server_id = 0;
uint32_t last_auth_id = 0;
static struct server *srv = NULL, *parentsrv = NULL;
static struct server_config *srv_conf = NULL;
struct serverlist servers;
struct media_type media;
struct address *host_v4(const char *);
struct address *host_v6(const char *);
int host_dns(const char *, struct addresslist *,
int, struct portrange *, const char *, int);
int host_if(const char *, struct addresslist *,
int, struct portrange *, const char *, int);
int host(const char *, struct addresslist *,
int, struct portrange *, const char *, int);
struct server *server_inherit(struct server *, struct server_config *,
struct server_config *);
int listen_on(const char *, int, struct portrange *);
int getservice(char *);
int is_if_in_group(const char *, const char *);
int get_fastcgi_dest(struct server_config *, const char *, char *);
void remove_locations(struct server_config *);
typedef struct {
union {
int64_t number;
char *string;
struct timeval tv;
struct portrange port;
struct auth auth;
} v;
int lineno;
} YYSTYPE;
%}
%token ACCESS ALIAS AUTO BACKLOG BODY BUFFER CERTIFICATE CHROOT CIPHERS COMMON
%token COMBINED CONNECTION DHE DIRECTORY ECDHE ERR FCGI INDEX IP KEY LIFETIME
%token LISTEN LOCATION LOG LOGDIR MATCH MAXIMUM NO NODELAY OCSP ON PORT PREFORK
%token PROTOCOLS REQUESTS ROOT SACK SERVER SOCKET STRIP STYLE SYSLOG TCP TICKET
%token TIMEOUT TLS TYPE TYPES HSTS MAXAGE SUBDOMAINS DEFAULT PRELOAD REQUEST
%token ERROR INCLUDE AUTHENTICATE WITH BLOCK DROP RETURN PASS REWRITE
%token CA CLIENT CRL OPTIONAL PARAM FORWARDED FOUND NOT
%token ERRDOCS GZIPSTATIC
%token <v.string> STRING
%token <v.number> NUMBER
%type <v.port> port
%type <v.string> fcgiport
%type <v.number> opttls optmatch optfound
%type <v.tv> timeout
%type <v.string> numberstring optstring
%type <v.auth> authopts
%%
grammar : /* empty */
| grammar include '\n'
| grammar '\n'
| grammar varset '\n'
| grammar main '\n'
| grammar server '\n'
| grammar types '\n'
| grammar error '\n' { file->errors++; }
;
include : INCLUDE STRING {
struct file *nfile;
if ((nfile = pushfile($2, 0)) == NULL) {
yyerror("failed to include file %s", $2);
free($2);
YYERROR;
}
free($2);
file = nfile;
lungetc('\n');
}
;
varset : STRING '=' STRING {
char *s = $1;
while (*s++) {
if (isspace((unsigned char)*s)) {
yyerror("macro name cannot contain "
"whitespace");
free($1);
free($3);
YYERROR;
}
}
if (symset($1, $3, 0) == -1)
fatal("cannot store variable");
free($1);
free($3);
}
;
opttls : /*empty*/ { $$ = 0; }
| TLS { $$ = 1; }
;
main : PREFORK NUMBER {
if (loadcfg)
break;
if ($2 <= 0 || $2 > PROC_MAX_INSTANCES) {
yyerror("invalid number of preforked "
"servers: %lld", $2);
YYERROR;
}
conf->sc_prefork_server = $2;
}
| CHROOT STRING {
conf->sc_chroot = $2;
}
| ERRDOCS STRING {
if ($2 != NULL && strlcpy(conf->sc_errdocroot, $2,
sizeof(conf->sc_errdocroot)) >=
sizeof(conf->sc_errdocroot)) {
yyerror("errdoc root path too long");
free($2);
YYERROR;
}
free($2);
conf->sc_custom_errdocs = 1;
}
| LOGDIR STRING {
conf->sc_logdir = $2;
}
| DEFAULT TYPE mediastring {
memcpy(&conf->sc_default_type, &media,
sizeof(struct media_type));
}
;
server : SERVER optmatch STRING {
struct server *s;
struct sockaddr_un *sun;
if (!loadcfg) {
free($3);
YYACCEPT;
}
if ((s = calloc(1, sizeof (*s))) == NULL)
fatal("out of memory");
if (strlcpy(s->srv_conf.name, $3,
sizeof(s->srv_conf.name)) >=
sizeof(s->srv_conf.name)) {
yyerror("server name truncated");
free($3);
free(s);
YYERROR;
}
free($3);
strlcpy(s->srv_conf.root, HTTPD_DOCROOT,
sizeof(s->srv_conf.root));
strlcpy(s->srv_conf.index, HTTPD_INDEX,
sizeof(s->srv_conf.index));
strlcpy(s->srv_conf.accesslog, HTTPD_ACCESS_LOG,
sizeof(s->srv_conf.accesslog));
strlcpy(s->srv_conf.errorlog, HTTPD_ERROR_LOG,
sizeof(s->srv_conf.errorlog));
s->srv_conf.id = ++last_server_id;
s->srv_conf.parent_id = s->srv_conf.id;
s->srv_s = -1;
s->srv_conf.timeout.tv_sec = SERVER_TIMEOUT;
s->srv_conf.requesttimeout.tv_sec =
SERVER_REQUESTTIMEOUT;
s->srv_conf.maxrequests = SERVER_MAXREQUESTS;
s->srv_conf.maxrequestbody = SERVER_MAXREQUESTBODY;
s->srv_conf.flags = SRVFLAG_LOG;
if ($2)
s->srv_conf.flags |= SRVFLAG_SERVER_MATCH;
s->srv_conf.logformat = LOG_FORMAT_COMMON;
s->srv_conf.tls_protocols = TLS_PROTOCOLS_DEFAULT;
if ((s->srv_conf.tls_cert_file =
strdup(HTTPD_TLS_CERT)) == NULL)
fatal("out of memory");
if ((s->srv_conf.tls_key_file =
strdup(HTTPD_TLS_KEY)) == NULL)
fatal("out of memory");
strlcpy(s->srv_conf.tls_ciphers,
HTTPD_TLS_CIPHERS,
sizeof(s->srv_conf.tls_ciphers));
strlcpy(s->srv_conf.tls_dhe_params,
HTTPD_TLS_DHE_PARAMS,
sizeof(s->srv_conf.tls_dhe_params));
strlcpy(s->srv_conf.tls_ecdhe_curves,
HTTPD_TLS_ECDHE_CURVES,
sizeof(s->srv_conf.tls_ecdhe_curves));
sun = (struct sockaddr_un *)&s->srv_conf.fastcgi_ss;
sun->sun_family = AF_UNIX;
(void)strlcpy(sun->sun_path, HTTPD_FCGI_SOCKET,
sizeof(sun->sun_path));
sun->sun_len = sizeof(struct sockaddr_un);
s->srv_conf.hsts_max_age = SERVER_HSTS_DEFAULT_AGE;
(void)strlcpy(s->srv_conf.errdocroot,
conf->sc_errdocroot,
sizeof(s->srv_conf.errdocroot));
if (conf->sc_custom_errdocs)
s->srv_conf.flags |= SRVFLAG_ERRDOCS;
if (last_server_id == INT_MAX) {
yyerror("too many servers defined");
free(s);
YYERROR;
}
srv = s;
srv_conf = &srv->srv_conf;
SPLAY_INIT(&srv->srv_clients);
TAILQ_INIT(&srv->srv_hosts);
TAILQ_INIT(&srv_conf->fcgiparams);
TAILQ_INSERT_TAIL(&srv->srv_hosts, srv_conf, entry);
} '{' optnl serveropts_l '}' {
struct server *s, *sn;
struct server_config *a, *b;
srv_conf = &srv->srv_conf;
/* Check if the new server already exists. */
if (server_match(srv, 1) != NULL) {
yyerror("server \"%s\" defined twice",
srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYABORT;
}
if (srv->srv_conf.ss.ss_family == AF_UNSPEC) {
yyerror("listen address not specified");
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
if ((s = server_match(srv, 0)) != NULL) {
if ((s->srv_conf.flags & SRVFLAG_TLS) !=
(srv->srv_conf.flags & SRVFLAG_TLS)) {
yyerror("server \"%s\": tls and "
"non-tls on same address/port",
srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
if (srv->srv_conf.flags & SRVFLAG_TLS &&
server_tls_cmp(s, srv) != 0) {
yyerror("server \"%s\": tls "
"configuration mismatch on same "
"address/port",
srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
}
if ((srv->srv_conf.flags & SRVFLAG_TLS) &&
srv->srv_conf.tls_protocols == 0) {
yyerror("server \"%s\": no tls protocols",
srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
if (server_tls_load_keypair(srv) == -1) {
/* Soft fail as there may be no certificate. */
log_warnx("%s:%d: server \"%s\": failed to "
"load public/private keys", file->name,
yylval.lineno, srv->srv_conf.name);
remove_locations(srv_conf);
serverconfig_free(srv_conf);
srv_conf = NULL;
free(srv);
srv = NULL;
break;
}
if (server_tls_load_ca(srv) == -1) {
yyerror("server \"%s\": failed to load "
"ca cert(s)", srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
if (server_tls_load_crl(srv) == -1) {
yyerror("server \"%s\": failed to load crl(s)",
srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
if (server_tls_load_ocsp(srv) == -1) {
yyerror("server \"%s\": failed to load "
"ocsp staple", srv->srv_conf.name);
serverconfig_free(srv_conf);
free(srv);
YYERROR;
}
DPRINTF("adding server \"%s[%u]\"",
srv->srv_conf.name, srv->srv_conf.id);
TAILQ_INSERT_TAIL(conf->sc_servers, srv, srv_entry);
/*
* Add aliases and additional listen addresses as
* individual servers.
*/
TAILQ_FOREACH(a, &srv->srv_hosts, entry) {
/* listen address */
if (a->ss.ss_family == AF_UNSPEC)
continue;
TAILQ_FOREACH(b, &srv->srv_hosts, entry) {
/* alias name */
if (*b->name == '\0' ||
(b == &srv->srv_conf && b == a))
continue;
if ((sn = server_inherit(srv,
b, a)) == NULL) {
serverconfig_free(srv_conf);
free(srv);
YYABORT;
}
DPRINTF("adding server \"%s[%u]\"",
sn->srv_conf.name, sn->srv_conf.id);
TAILQ_INSERT_TAIL(conf->sc_servers,
sn, srv_entry);
}
}
/* Remove temporary aliases */
TAILQ_FOREACH_SAFE(a, &srv->srv_hosts, entry, b) {
TAILQ_REMOVE(&srv->srv_hosts, a, entry);
if (a == &srv->srv_conf)
continue;
serverconfig_free(a);
free(a);
}
srv = NULL;
srv_conf = NULL;
}
;
serveropts_l : serveropts_l serveroptsl nl
| serveroptsl optnl
;
serveroptsl : LISTEN ON STRING opttls port {
if (listen_on($3, $4, &$5) == -1) {
free($3);
YYERROR;
}
free($3);
}
| ALIAS optmatch STRING {
struct server_config *alias;
if (parentsrv != NULL) {
yyerror("alias inside location");
free($3);
YYERROR;
}
if ((alias = calloc(1, sizeof(*alias))) == NULL)
fatal("out of memory");
if (strlcpy(alias->name, $3, sizeof(alias->name)) >=
sizeof(alias->name)) {
yyerror("server alias truncated");
free($3);
free(alias);
YYERROR;
}
free($3);
if ($2)
alias->flags |= SRVFLAG_SERVER_MATCH;
TAILQ_INSERT_TAIL(&srv->srv_hosts, alias, entry);
}
| ERRDOCS STRING {
if (parentsrv != NULL) {
yyerror("errdocs inside location");
YYERROR;
}
if ($2 != NULL && strlcpy(srv->srv_conf.errdocroot, $2,
sizeof(srv->srv_conf.errdocroot)) >=
sizeof(srv->srv_conf.errdocroot)) {
yyerror("errdoc root path too long");
free($2);
YYERROR;
}
free($2);
srv->srv_conf.flags |= SRVFLAG_ERRDOCS;
}
| NO ERRDOCS {
if (parentsrv != NULL) {
yyerror("errdocs inside location");
YYERROR;
}
srv->srv_conf.flags &= ~SRVFLAG_ERRDOCS;
}
| tcpip {
if (parentsrv != NULL) {
yyerror("tcp flags inside location");
YYERROR;
}
}
| connection {
if (parentsrv != NULL) {
yyerror("connection options inside location");
YYERROR;
}
}
| tls {
struct server_config *sc;
int tls_flag = 0;
if (parentsrv != NULL) {
yyerror("tls configuration inside location");
YYERROR;
}
/* Ensure that at least one server has TLS enabled. */
TAILQ_FOREACH(sc, &srv->srv_hosts, entry) {
tls_flag |= (sc->flags & SRVFLAG_TLS);
}
if (tls_flag == 0) {
yyerror("tls options without tls listener");
YYERROR;
}
}
| request
| root
| directory
| logformat
| fastcgi
| authenticate
| gzip_static
| filter
| LOCATION optfound optmatch STRING {
struct server *s;
struct sockaddr_un *sun;
if (srv->srv_conf.ss.ss_family == AF_UNSPEC) {
yyerror("listen address not specified");
free($4);
YYERROR;
}
if (parentsrv != NULL) {
yyerror("location %s inside location", $4);
free($4);
YYERROR;
}
if (!loadcfg) {
free($4);
YYACCEPT;
}
if ((s = calloc(1, sizeof (*s))) == NULL)
fatal("out of memory");
if (strlcpy(s->srv_conf.location, $4,
sizeof(s->srv_conf.location)) >=
sizeof(s->srv_conf.location)) {
yyerror("server location truncated");
free($4);
free(s);
YYERROR;
}
free($4);
if (strlcpy(s->srv_conf.name, srv->srv_conf.name,
sizeof(s->srv_conf.name)) >=
sizeof(s->srv_conf.name)) {
yyerror("server name truncated");
free(s);
YYERROR;
}
sun = (struct sockaddr_un *)&s->srv_conf.fastcgi_ss;
sun->sun_family = AF_UNIX;
(void)strlcpy(sun->sun_path, HTTPD_FCGI_SOCKET,
sizeof(sun->sun_path));
sun->sun_len = sizeof(struct sockaddr_un);
s->srv_conf.id = ++last_server_id;
/* A location entry uses the parent id */
s->srv_conf.parent_id = srv->srv_conf.id;
s->srv_conf.flags = SRVFLAG_LOCATION;
if ($2 == 1) {
s->srv_conf.flags &=
~SRVFLAG_LOCATION_NOT_FOUND;
s->srv_conf.flags |=
SRVFLAG_LOCATION_FOUND;
} else if ($2 == -1) {
s->srv_conf.flags &=
~SRVFLAG_LOCATION_FOUND;
s->srv_conf.flags |=
SRVFLAG_LOCATION_NOT_FOUND;
}
if ($3)
s->srv_conf.flags |= SRVFLAG_LOCATION_MATCH;
s->srv_s = -1;
memcpy(&s->srv_conf.ss, &srv->srv_conf.ss,
sizeof(s->srv_conf.ss));
s->srv_conf.port = srv->srv_conf.port;
s->srv_conf.prefixlen = srv->srv_conf.prefixlen;
s->srv_conf.tls_flags = srv->srv_conf.tls_flags;
if (last_server_id == INT_MAX) {
yyerror("too many servers/locations defined");
free(s);
YYERROR;
}
parentsrv = srv;
srv = s;
srv_conf = &srv->srv_conf;
SPLAY_INIT(&srv->srv_clients);
} '{' optnl serveropts_l '}' {
struct server *s = NULL;
uint32_t f;
f = SRVFLAG_LOCATION_FOUND |
SRVFLAG_LOCATION_NOT_FOUND;
TAILQ_FOREACH(s, conf->sc_servers, srv_entry) {
/* Compare locations of same parent server */
if ((s->srv_conf.flags & SRVFLAG_LOCATION) &&
s->srv_conf.parent_id ==
srv_conf->parent_id &&
(s->srv_conf.flags & f) ==
(srv_conf->flags & f) &&
strcmp(s->srv_conf.location,
srv_conf->location) == 0)
break;
}
if (s != NULL) {
yyerror("location \"%s\" defined twice",
srv->srv_conf.location);
serverconfig_free(srv_conf);
free(srv);
YYABORT;
}
DPRINTF("adding location \"%s\" for \"%s[%u]\"",
srv->srv_conf.location,
srv->srv_conf.name, srv->srv_conf.id);
TAILQ_INSERT_TAIL(conf->sc_servers, srv, srv_entry);
srv = parentsrv;
srv_conf = &parentsrv->srv_conf;
parentsrv = NULL;
}
| DEFAULT TYPE mediastring {
srv_conf->flags |= SRVFLAG_DEFAULT_TYPE;
memcpy(&srv_conf->default_type, &media,
sizeof(struct media_type));
}
| include
| hsts {
if (parentsrv != NULL) {
yyerror("hsts inside location");
YYERROR;
}
srv->srv_conf.flags |= SRVFLAG_SERVER_HSTS;
}
;
optfound : /* empty */ { $$ = 0; }
| FOUND { $$ = 1; }
| NOT FOUND { $$ = -1; }
;
hsts : HSTS '{' optnl hstsflags_l '}'
| HSTS hstsflags
| HSTS
;
hstsflags_l : hstsflags optcommanl hstsflags_l
| hstsflags optnl
;
hstsflags : MAXAGE NUMBER {
if ($2 < 0 || $2 > INT_MAX) {
yyerror("invalid number of seconds: %lld", $2);
YYERROR;
}
srv_conf->hsts_max_age = $2;
}
| SUBDOMAINS {
srv->srv_conf.hsts_flags |= HSTSFLAG_SUBDOMAINS;
}
| PRELOAD {
srv->srv_conf.hsts_flags |= HSTSFLAG_PRELOAD;
}
;
fastcgi : NO FCGI {
srv_conf->flags &= ~SRVFLAG_FCGI;
srv_conf->flags |= SRVFLAG_NO_FCGI;
}
| FCGI {
srv_conf->flags &= ~SRVFLAG_NO_FCGI;
srv_conf->flags |= SRVFLAG_FCGI;
}
| FCGI {
srv_conf->flags &= ~SRVFLAG_NO_FCGI;
srv_conf->flags |= SRVFLAG_FCGI;
} '{' optnl fcgiflags_l '}'
| FCGI {
srv_conf->flags &= ~SRVFLAG_NO_FCGI;
srv_conf->flags |= SRVFLAG_FCGI;
} fcgiflags
;
fcgiflags_l : fcgiflags optcommanl fcgiflags_l
| fcgiflags optnl
;
fcgiflags : SOCKET STRING {
struct sockaddr_un *sun;
sun = (struct sockaddr_un *)&srv_conf->fastcgi_ss;
memset(sun, 0, sizeof(*sun));
sun->sun_family = AF_UNIX;
if (strlcpy(sun->sun_path, $2, sizeof(sun->sun_path))
>= sizeof(sun->sun_path)) {
yyerror("socket path too long");
free($2);
YYERROR;
}
srv_conf->fastcgi_ss.ss_len =
sizeof(struct sockaddr_un);
free($2);
}
| SOCKET TCP STRING {
if (get_fastcgi_dest(srv_conf, $3, FCGI_DEFAULT_PORT)
== -1) {
free($3);
YYERROR;
}
free($3);
}
| SOCKET TCP STRING fcgiport {
if (get_fastcgi_dest(srv_conf, $3, $4) == -1) {
free($3);
free($4);
YYERROR;
}
free($3);
free($4);
}
| PARAM STRING STRING {
struct fastcgi_param *param;
if ((param = calloc(1, sizeof(*param))) == NULL)
fatal("out of memory");
if (strlcpy(param->name, $2, sizeof(param->name)) >=
sizeof(param->name)) {
yyerror("fastcgi_param name truncated");
free($2);
free($3);
free(param);
YYERROR;
}
if (strlcpy(param->value, $3, sizeof(param->value)) >=
sizeof(param->value)) {
yyerror("fastcgi_param value truncated");
free($2);
free($3);
free(param);
YYERROR;
}
free($2);
free($3);
DPRINTF("[%s,%s,%d]: adding param \"%s\" value \"%s\"",
srv_conf->location, srv_conf->name, srv_conf->id,
param->name, param->value);
TAILQ_INSERT_HEAD(&srv_conf->fcgiparams, param, entry);
}
| STRIP NUMBER {
if ($2 < 0 || $2 > INT_MAX) {
yyerror("invalid fastcgi strip number");
YYERROR;
}
srv_conf->fcgistrip = $2;
}
;
connection : CONNECTION '{' optnl conflags_l '}'
| CONNECTION conflags
;
conflags_l : conflags optcommanl conflags_l
| conflags optnl
;
conflags : TIMEOUT timeout {
memcpy(&srv_conf->timeout, &$2,
sizeof(struct timeval));
}
| REQUEST TIMEOUT timeout {
memcpy(&srv_conf->requesttimeout, &$3,
sizeof(struct timeval));
}
| MAXIMUM REQUESTS NUMBER {
srv_conf->maxrequests = $3;
}
| MAXIMUM REQUEST BODY NUMBER {
srv_conf->maxrequestbody = $4;
}
;
tls : TLS '{' optnl tlsopts_l '}'
| TLS tlsopts
;
tlsopts_l : tlsopts optcommanl tlsopts_l
| tlsopts optnl
;
tlsopts : CERTIFICATE STRING {
free(srv_conf->tls_cert_file);
if ((srv_conf->tls_cert_file = strdup($2)) == NULL)
fatal("out of memory");
free($2);
}
| KEY STRING {
free(srv_conf->tls_key_file);
if ((srv_conf->tls_key_file = strdup($2)) == NULL)
fatal("out of memory");
free($2);
}
| OCSP STRING {
free(srv_conf->tls_ocsp_staple_file);
if ((srv_conf->tls_ocsp_staple_file = strdup($2))
== NULL)
fatal("out of memory");
free($2);
}
| CIPHERS STRING {
if (strlcpy(srv_conf->tls_ciphers, $2,
sizeof(srv_conf->tls_ciphers)) >=
sizeof(srv_conf->tls_ciphers)) {
yyerror("ciphers too long");
free($2);
YYERROR;
}
free($2);
}
| CLIENT CA STRING tlsclientopt {
srv_conf->tls_flags |= TLSFLAG_CA;
free(srv_conf->tls_ca_file);
if ((srv_conf->tls_ca_file = strdup($3)) == NULL)
fatal("out of memory");
free($3);
}
| DHE STRING {
if (strlcpy(srv_conf->tls_dhe_params, $2,
sizeof(srv_conf->tls_dhe_params)) >=
sizeof(srv_conf->tls_dhe_params)) {
yyerror("dhe too long");
free($2);
YYERROR;
}
free($2);
}
| ECDHE STRING {
if (strlcpy(srv_conf->tls_ecdhe_curves, $2,
sizeof(srv_conf->tls_ecdhe_curves)) >=
sizeof(srv_conf->tls_ecdhe_curves)) {
yyerror("ecdhe too long");
free($2);
YYERROR;
}
free($2);
}
| PROTOCOLS STRING {
if (tls_config_parse_protocols(
&srv_conf->tls_protocols, $2) != 0) {
yyerror("invalid tls protocols");
free($2);
YYERROR;
}
free($2);
}
| TICKET LIFETIME DEFAULT {
srv_conf->tls_ticket_lifetime = SERVER_DEF_TLS_LIFETIME;
}
| TICKET LIFETIME NUMBER {
if ($3 != 0 && $3 < SERVER_MIN_TLS_LIFETIME) {
yyerror("ticket lifetime too small");
YYERROR;
}
if ($3 > SERVER_MAX_TLS_LIFETIME) {
yyerror("ticket lifetime too large");
YYERROR;
}
srv_conf->tls_ticket_lifetime = $3;
}
| NO TICKET {
srv_conf->tls_ticket_lifetime = 0;
}
;
tlsclientopt : /* empty */
| tlsclientopt CRL STRING {
srv_conf->tls_flags = TLSFLAG_CRL;
free(srv_conf->tls_crl_file);
if ((srv_conf->tls_crl_file = strdup($3)) == NULL)
fatal("out of memory");
free($3);
}
| tlsclientopt OPTIONAL {
srv_conf->tls_flags |= TLSFLAG_OPTIONAL;
}
;
root : ROOT rootflags
| ROOT '{' optnl rootflags_l '}'
;
rootflags_l : rootflags optcommanl rootflags_l
| rootflags optnl
;
rootflags : STRING {
if (strlcpy(srv->srv_conf.root, $1,
sizeof(srv->srv_conf.root)) >=
sizeof(srv->srv_conf.root)) {
yyerror("document root too long");
free($1);
YYERROR;
}
free($1);
srv->srv_conf.flags |= SRVFLAG_ROOT;
}
;
request : REQUEST requestflags
| REQUEST '{' optnl requestflags_l '}'
;
requestflags_l : requestflags optcommanl requestflags_l
| requestflags optnl
;
requestflags : REWRITE STRING {
if (strlcpy(srv->srv_conf.path, $2,
sizeof(srv->srv_conf.path)) >=
sizeof(srv->srv_conf.path)) {
yyerror("request path too long");
free($2);
YYERROR;
}
free($2);
srv->srv_conf.flags |= SRVFLAG_PATH_REWRITE;
srv->srv_conf.flags &= ~SRVFLAG_NO_PATH_REWRITE;
}
| NO REWRITE {
srv->srv_conf.flags |= SRVFLAG_NO_PATH_REWRITE;
srv->srv_conf.flags &= ~SRVFLAG_PATH_REWRITE;
}
| STRIP NUMBER {
if ($2 < 0 || $2 > INT_MAX) {
yyerror("invalid strip number");
YYERROR;
}
srv->srv_conf.strip = $2;
}
;
authenticate : NO AUTHENTICATE {
srv->srv_conf.flags |= SRVFLAG_NO_AUTH;
}
| AUTHENTICATE authopts {
struct auth *auth;
if ((auth = auth_add(conf->sc_auth, &$2)) == NULL) {
yyerror("failed to add auth");
YYERROR;
}
if (auth->auth_id == 0) {
/* New htpasswd, get new Id */
auth->auth_id = ++last_auth_id;
if (last_auth_id == INT_MAX) {
yyerror("too many auth ids defined");
auth_free(conf->sc_auth, auth);
YYERROR;
}
}
srv->srv_conf.auth_id = auth->auth_id;
srv->srv_conf.flags |= SRVFLAG_AUTH;
}
;
authopts : STRING WITH STRING {
if (strlcpy(srv->srv_conf.auth_realm, $1,
sizeof(srv->srv_conf.auth_realm)) >=
sizeof(srv->srv_conf.auth_realm)) {
yyerror("basic auth realm name too long");
free($1);
YYERROR;
}
free($1);
if (strlcpy($$.auth_htpasswd, $3,
sizeof($$.auth_htpasswd)) >=
sizeof($$.auth_htpasswd)) {
yyerror("password file name too long");
free($3);
YYERROR;
}
free($3);
}
| WITH STRING {
if (strlcpy($$.auth_htpasswd, $2,
sizeof($$.auth_htpasswd)) >=
sizeof($$.auth_htpasswd)) {
yyerror("password file name too long");
free($2);
YYERROR;
}
free($2);
};
directory : DIRECTORY dirflags
| DIRECTORY '{' optnl dirflags_l '}'
;
dirflags_l : dirflags optcommanl dirflags_l
| dirflags optnl
;
dirflags : INDEX STRING {
if (strlcpy(srv_conf->index, $2,
sizeof(srv_conf->index)) >=
sizeof(srv_conf->index)) {
yyerror("index file too long");
free($2);
YYERROR;
}
srv_conf->flags &= ~SRVFLAG_NO_INDEX;
srv_conf->flags |= SRVFLAG_INDEX;
free($2);
}
| NO INDEX {
srv_conf->flags &= ~SRVFLAG_INDEX;
srv_conf->flags |= SRVFLAG_NO_INDEX;
}
| AUTO INDEX {
srv_conf->flags &= ~SRVFLAG_NO_AUTO_INDEX;
srv_conf->flags |= SRVFLAG_AUTO_INDEX;
}
| NO AUTO INDEX {
srv_conf->flags &= ~SRVFLAG_AUTO_INDEX;
srv_conf->flags |= SRVFLAG_NO_AUTO_INDEX;
}
;
logformat : LOG logflags
| LOG '{' optnl logflags_l '}'
| NO LOG {
srv_conf->flags &= ~SRVFLAG_LOG;
srv_conf->flags |= SRVFLAG_NO_LOG;
}
;
logflags_l : logflags optcommanl logflags_l
| logflags optnl
;
logflags : STYLE logstyle
| SYSLOG {
srv_conf->flags &= ~SRVFLAG_NO_SYSLOG;
srv_conf->flags |= SRVFLAG_SYSLOG;
}
| NO SYSLOG {
srv_conf->flags &= ~SRVFLAG_SYSLOG;
srv_conf->flags |= SRVFLAG_NO_SYSLOG;
}
| ACCESS STRING {
if (strlcpy(srv_conf->accesslog, $2,
sizeof(srv_conf->accesslog)) >=
sizeof(srv_conf->accesslog)) {
yyerror("access log name too long");
free($2);
YYERROR;
}
free($2);
srv_conf->flags |= SRVFLAG_ACCESS_LOG;
}
| ERR STRING {
if (strlcpy(srv_conf->errorlog, $2,
sizeof(srv_conf->errorlog)) >=
sizeof(srv_conf->errorlog)) {
yyerror("error log name too long");
free($2);
YYERROR;
}
free($2);
srv_conf->flags |= SRVFLAG_ERROR_LOG;
}
;
logstyle : COMMON {
srv_conf->flags &= ~SRVFLAG_NO_LOG;
srv_conf->flags |= SRVFLAG_LOG;
srv_conf->logformat = LOG_FORMAT_COMMON;
}
| COMBINED {
srv_conf->flags &= ~SRVFLAG_NO_LOG;
srv_conf->flags |= SRVFLAG_LOG;
srv_conf->logformat = LOG_FORMAT_COMBINED;
}
| CONNECTION {
srv_conf->flags &= ~SRVFLAG_NO_LOG;
srv_conf->flags |= SRVFLAG_LOG;
srv_conf->logformat = LOG_FORMAT_CONNECTION;
}
| FORWARDED {
srv_conf->flags &= ~SRVFLAG_NO_LOG;
srv_conf->flags |= SRVFLAG_LOG;
srv_conf->logformat = LOG_FORMAT_FORWARDED;
}
;
filter : block RETURN NUMBER optstring {
if ($3 <= 0 || server_httperror_byid($3) == NULL) {
yyerror("invalid return code: %lld", $3);
free($4);
YYERROR;
}
srv_conf->return_code = $3;
if ($4 != NULL) {
/* Only for 3xx redirection headers */
if ($3 < 300 || $3 > 399) {
yyerror("invalid return code for "
"location URI");
free($4);
YYERROR;
}
srv_conf->return_uri = $4;
srv_conf->return_uri_len = strlen($4) + 1;
}
}
| block DROP {
/* No return code, silently drop the connection */
srv_conf->return_code = 0;
}
| block {
/* Forbidden */
srv_conf->return_code = 403;
}
| PASS {
srv_conf->flags &= ~SRVFLAG_BLOCK;
srv_conf->flags |= SRVFLAG_NO_BLOCK;
}
;
block : BLOCK {
srv_conf->flags &= ~SRVFLAG_NO_BLOCK;
srv_conf->flags |= SRVFLAG_BLOCK;
}
;
optmatch : /* empty */ { $$ = 0; }
| MATCH { $$ = 1; }
;
optstring : /* empty */ { $$ = NULL; }
| STRING { $$ = $1; }
;
fcgiport : NUMBER {
if ($1 <= 0 || $1 > (int)USHRT_MAX) {
yyerror("invalid port: %lld", $1);
YYERROR;
}
if (asprintf(&$$, "%lld", $1) == -1) {
yyerror("out of memory");
YYERROR;
}
}
| STRING {
if (getservice($1) <= 0) {
yyerror("invalid port: %s", $1);
free($1);
YYERROR;
}
$$ = $1;
}
;
gzip_static : NO GZIPSTATIC {
srv->srv_conf.flags &= ~SRVFLAG_GZIP_STATIC;
}
| GZIPSTATIC {
srv->srv_conf.flags |= SRVFLAG_GZIP_STATIC;
}
;
tcpip : TCP '{' optnl tcpflags_l '}'
| TCP tcpflags
;
tcpflags_l : tcpflags optcommanl tcpflags_l
| tcpflags optnl
;
tcpflags : SACK { srv_conf->tcpflags |= TCPFLAG_SACK; }
| NO SACK { srv_conf->tcpflags |= TCPFLAG_NSACK; }
| NODELAY {
srv_conf->tcpflags |= TCPFLAG_NODELAY;
}
| NO NODELAY {
srv_conf->tcpflags |= TCPFLAG_NNODELAY;
}
| BACKLOG NUMBER {
if ($2 < 0 || $2 > SERVER_MAX_CLIENTS) {
yyerror("invalid backlog: %lld", $2);
YYERROR;
}
srv_conf->tcpbacklog = $2;
}
| SOCKET BUFFER NUMBER {
srv_conf->tcpflags |= TCPFLAG_BUFSIZ;
if ((srv_conf->tcpbufsiz = $3) < 0) {
yyerror("invalid socket buffer size: %lld", $3);
YYERROR;
}
}
| IP STRING NUMBER {
if ($3 < 0) {
yyerror("invalid ttl: %lld", $3);
free($2);
YYERROR;
}
if (strcasecmp("ttl", $2) == 0) {
srv_conf->tcpflags |= TCPFLAG_IPTTL;
srv_conf->tcpipttl = $3;
} else if (strcasecmp("minttl", $2) == 0) {
srv_conf->tcpflags |= TCPFLAG_IPMINTTL;
srv_conf->tcpipminttl = $3;
} else {
yyerror("invalid TCP/IP flag: %s", $2);
free($2);
YYERROR;
}
free($2);
}
;
types : TYPES '{' optnl mediaopts_l '}'
;
mediaopts_l : mediaopts_l mediaoptsl nl
| mediaoptsl nl
;
mediaoptsl : mediastring medianames_l optsemicolon
| include
;
mediastring : STRING '/' STRING {
if (strlcpy(media.media_type, $1,
sizeof(media.media_type)) >=
sizeof(media.media_type) ||
strlcpy(media.media_subtype, $3,
sizeof(media.media_subtype)) >=
sizeof(media.media_subtype)) {
yyerror("media type too long");
free($1);
free($3);
YYERROR;
}
free($1);
free($3);
}
;
medianames_l : medianames_l medianamesl
| medianamesl
;
medianamesl : numberstring {
if (strlcpy(media.media_name, $1,
sizeof(media.media_name)) >=
sizeof(media.media_name)) {
yyerror("media name too long");
free($1);
YYERROR;
}
free($1);
if (!loadcfg)
break;
if (media_add(conf->sc_mediatypes, &media) == NULL) {
yyerror("failed to add media type");
YYERROR;
}
}
;
port : PORT NUMBER {
if ($2 <= 0 || $2 > (int)USHRT_MAX) {
yyerror("invalid port: %lld", $2);
YYERROR;
}
$$.val[0] = htons($2);
$$.op = 1;
}
| PORT STRING {
int val;
if ((val = getservice($2)) == -1) {
yyerror("invalid port: %s", $2);
free($2);
YYERROR;
}
free($2);
$$.val[0] = val;
$$.op = 1;
}
;
timeout : NUMBER
{
if ($1 < 0) {
yyerror("invalid timeout: %lld", $1);
YYERROR;
}
$$.tv_sec = $1;
$$.tv_usec = 0;
}
;
numberstring : NUMBER {
char *s;
if (asprintf(&s, "%lld", $1) == -1) {
yyerror("asprintf: number");
YYERROR;
}
$$ = s;
}
| STRING
;
optsemicolon : ';'
|
;
optnl : '\n' optnl
|
;
optcommanl : ',' optnl
| nl
;
nl : '\n' optnl
;
%%
struct keywords {
const char *k_name;
int k_val;
};
int
yyerror(const char *fmt, ...)
{
va_list ap;
char *msg;
file->errors++;
va_start(ap, fmt);
if (vasprintf(&msg, fmt, ap) == -1)
fatalx("yyerror vasprintf");
va_end(ap);
logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
free(msg);
return (0);
}
int
kw_cmp(const void *k, const void *e)
{
return (strcmp(k, ((const struct keywords *)e)->k_name));
}
int
lookup(char *s)
{
/* this has to be sorted always */
static const struct keywords keywords[] = {
{ "access", ACCESS },
{ "alias", ALIAS },
{ "authenticate", AUTHENTICATE},
{ "auto", AUTO },
{ "backlog", BACKLOG },
{ "block", BLOCK },
{ "body", BODY },
{ "buffer", BUFFER },
{ "ca", CA },
{ "certificate", CERTIFICATE },
{ "chroot", CHROOT },
{ "ciphers", CIPHERS },
{ "client", CLIENT },
{ "combined", COMBINED },
{ "common", COMMON },
{ "connection", CONNECTION },
{ "crl", CRL },
{ "default", DEFAULT },
{ "dhe", DHE },
{ "directory", DIRECTORY },
{ "drop", DROP },
{ "ecdhe", ECDHE },
{ "errdocs", ERRDOCS },
{ "error", ERR },
{ "fastcgi", FCGI },
{ "forwarded", FORWARDED },
{ "found", FOUND },
{ "gzip-static", GZIPSTATIC },
{ "hsts", HSTS },
{ "include", INCLUDE },
{ "index", INDEX },
{ "ip", IP },
{ "key", KEY },
{ "lifetime", LIFETIME },
{ "listen", LISTEN },
{ "location", LOCATION },
{ "log", LOG },
{ "logdir", LOGDIR },
{ "match", MATCH },
{ "max", MAXIMUM },
{ "max-age", MAXAGE },
{ "no", NO },
{ "nodelay", NODELAY },
{ "not", NOT },
{ "ocsp", OCSP },
{ "on", ON },
{ "optional", OPTIONAL },
{ "param", PARAM },
{ "pass", PASS },
{ "port", PORT },
{ "prefork", PREFORK },
{ "preload", PRELOAD },
{ "protocols", PROTOCOLS },
{ "request", REQUEST },
{ "requests", REQUESTS },
{ "return", RETURN },
{ "rewrite", REWRITE },
{ "root", ROOT },
{ "sack", SACK },
{ "server", SERVER },
{ "socket", SOCKET },
{ "strip", STRIP },
{ "style", STYLE },
{ "subdomains", SUBDOMAINS },
{ "syslog", SYSLOG },
{ "tcp", TCP },
{ "ticket", TICKET },
{ "timeout", TIMEOUT },
{ "tls", TLS },
{ "type", TYPE },
{ "types", TYPES },
{ "with", WITH }
};
const struct keywords *p;
p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
sizeof(keywords[0]), kw_cmp);
if (p)
return (p->k_val);
else
return (STRING);
}
#define START_EXPAND 1
#define DONE_EXPAND 2
static int expanding;
int
igetc(void)
{
int c;
while (1) {
if (file->ungetpos > 0)
c = file->ungetbuf[--file->ungetpos];
else
c = getc(file->stream);
if (c == START_EXPAND)
expanding = 1;
else if (c == DONE_EXPAND)
expanding = 0;
else
break;
}
return (c);
}
int
lgetc(int quotec)
{
int c, next;
if (quotec) {
if ((c = igetc()) == EOF) {
yyerror("reached end of file while parsing "
"quoted string");
if (file == topfile || popfile() == EOF)
return (EOF);
return (quotec);
}
return (c);
}
while ((c = igetc()) == '\\') {
next = igetc();
if (next != '\n') {
c = next;
break;
}
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF) {
/*
* Fake EOL when hit EOF for the first time. This gets line
* count right if last line in included file is syntactically
* invalid and has no newline.
*/
if (file->eof_reached == 0) {
file->eof_reached = 1;
return ('\n');
}
while (c == EOF) {
if (file == topfile || popfile() == EOF)
return (EOF);
c = igetc();
}
}
return (c);
}
void
lungetc(int c)
{
if (c == EOF)
return;
if (file->ungetpos >= file->ungetsize) {
void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
if (p == NULL)
err(1, "%s", __func__);
file->ungetbuf = p;
file->ungetsize *= 2;
}
file->ungetbuf[file->ungetpos++] = c;
}
int
findeol(void)
{
int c;
/* skip to either EOF or the first real EOL */
while (1) {
c = lgetc(0);
if (c == '\n') {
file->lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
int
yylex(void)
{
char buf[8096];
char *p, *val;
int quotec, next, c;
int token;
top:
p = buf;
while ((c = lgetc(0)) == ' ' || c == '\t')
; /* nothing */
yylval.lineno = file->lineno;
if (c == '#')
while ((c = lgetc(0)) != '\n' && c != EOF)
; /* nothing */
if (c == '$' && !expanding) {
while (1) {
if ((c = lgetc(0)) == EOF)
return (0);
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
if (isalnum(c) || c == '_') {
*p++ = c;
continue;
}
*p = '\0';
lungetc(c);
break;
}
val = symget(buf);
if (val == NULL) {
yyerror("macro '%s' not defined", buf);
return (findeol());
}
p = val + strlen(val) - 1;
lungetc(DONE_EXPAND);
while (p >= val) {
lungetc((unsigned char)*p);
p--;
}
lungetc(START_EXPAND);
goto top;
}
switch (c) {
case '\'':
case '"':
quotec = c;
while (1) {
if ((c = lgetc(quotec)) == EOF)
return (0);
if (c == '\n') {
file->lineno++;
continue;
} else if (c == '\\') {
if ((next = lgetc(quotec)) == EOF)
return (0);
if (next == quotec || next == ' ' ||
next == '\t')
c = next;
else if (next == '\n') {
file->lineno++;
continue;
} else
lungetc(next);
} else if (c == quotec) {
*p = '\0';
break;
} else if (c == '\0') {
yyerror("syntax error");
return (findeol());
}
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
*p++ = c;
}
yylval.v.string = strdup(buf);
if (yylval.v.string == NULL)
err(1, "%s", __func__);
return (STRING);
}
#define allowed_to_end_number(x) \
(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
if (c == '-' || isdigit(c)) {
do {
*p++ = c;
if ((size_t)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && isdigit(c));
lungetc(c);
if (p == buf + 1 && buf[0] == '-')
goto nodigits;
if (c == EOF || allowed_to_end_number(c)) {
const char *errstr = NULL;
*p = '\0';
yylval.v.number = strtonum(buf, LLONG_MIN,
LLONG_MAX, &errstr);
if (errstr) {
yyerror("\"%s\" invalid number: %s",
buf, errstr);
return (findeol());
}
return (NUMBER);
} else {
nodigits:
while (p > buf + 1)
lungetc((unsigned char)*--p);
c = (unsigned char)*--p;
if (c == '-')
return (c);
}
}
#define allowed_in_string(x) \
(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
x != '{' && x != '}' && x != '<' && x != '>' && \
x != '!' && x != '=' && x != '#' && \
x != ',' && x != ';' && x != '/'))
if (isalnum(c) || c == ':' || c == '_' || c == '*') {
do {
*p++ = c;
if ((size_t)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
lungetc(c);
*p = '\0';
if ((token = lookup(buf)) == STRING)
if ((yylval.v.string = strdup(buf)) == NULL)
err(1, "%s", __func__);
return (token);
}
if (c == '\n') {
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF)
return (0);
return (c);
}
int
check_file_secrecy(int fd, const char *fname)
{
struct stat st;
if (fstat(fd, &st)) {
log_warn("cannot stat %s", fname);
return (-1);
}
if (st.st_uid != 0 && st.st_uid != getuid()) {
log_warnx("%s: owner not root or current user", fname);
return (-1);
}
if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
log_warnx("%s: group writable or world read/writable", fname);
return (-1);
}
return (0);
}
struct file *
pushfile(const char *name, int secret)
{
struct file *nfile;
if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
log_warn("%s", __func__);
return (NULL);
}
if ((nfile->name = strdup(name)) == NULL) {
log_warn("%s", __func__);
free(nfile);
return (NULL);
}
if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
log_warn("%s: %s", __func__, nfile->name);
free(nfile->name);
free(nfile);
return (NULL);
} else if (secret &&
check_file_secrecy(fileno(nfile->stream), nfile->name)) {
fclose(nfile->stream);
free(nfile->name);
free(nfile);
return (NULL);
}
nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
nfile->ungetsize = 16;
nfile->ungetbuf = malloc(nfile->ungetsize);
if (nfile->ungetbuf == NULL) {
log_warn("%s", __func__);
fclose(nfile->stream);
free(nfile->name);
free(nfile);
return (NULL);
}
TAILQ_INSERT_TAIL(&files, nfile, entry);
return (nfile);
}
int
popfile(void)
{
struct file *prev;
if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
prev->errors += file->errors;
TAILQ_REMOVE(&files, file, entry);
fclose(file->stream);
free(file->name);
free(file->ungetbuf);
free(file);
file = prev;
return (file ? 0 : EOF);
}
int
parse_config(const char *filename, struct httpd *x_conf)
{
struct sym *sym, *next;
struct media_type dflt = HTTPD_DEFAULT_TYPE;
conf = x_conf;
if (config_init(conf) == -1) {
log_warn("%s: cannot initialize configuration", __func__);
return (-1);
}
/* Set default media type */
memcpy(&conf->sc_default_type, &dflt, sizeof(struct media_type));
errors = 0;
if ((file = pushfile(filename, 0)) == NULL)
return (-1);
topfile = file;
setservent(1);
yyparse();
errors = file->errors;
while (popfile() != EOF)
;
endservent();
endprotoent();
/* Free macros */
TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
if (!sym->persist) {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
}
return (errors ? -1 : 0);
}
int
load_config(const char *filename, struct httpd *x_conf)
{
struct sym *sym, *next;
struct http_mediatype mediatypes[] = MEDIA_TYPES;
struct media_type m;
int i;
conf = x_conf;
conf->sc_flags = 0;
loadcfg = 1;
errors = 0;
last_server_id = 0;
last_auth_id = 0;
srv = NULL;
if ((file = pushfile(filename, 0)) == NULL)
return (-1);
topfile = file;
setservent(1);
yyparse();
errors = file->errors;
popfile();
endservent();
endprotoent();
/* Free macros and check which have not been used. */
for (sym = TAILQ_FIRST(&symhead); sym != NULL; sym = next) {
next = TAILQ_NEXT(sym, entry);
if ((conf->sc_opts & HTTPD_OPT_VERBOSE) && !sym->used)
fprintf(stderr, "warning: macro '%s' not "
"used\n", sym->nam);
if (!sym->persist) {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
}
if (TAILQ_EMPTY(conf->sc_servers)) {
log_warnx("no actions, nothing to do");
errors++;
}
if (RB_EMPTY(conf->sc_mediatypes)) {
/* Add default media types */
for (i = 0; mediatypes[i].media_name != NULL; i++) {
(void)strlcpy(m.media_name, mediatypes[i].media_name,
sizeof(m.media_name));
(void)strlcpy(m.media_type, mediatypes[i].media_type,
sizeof(m.media_type));
(void)strlcpy(m.media_subtype,
mediatypes[i].media_subtype,
sizeof(m.media_subtype));
m.media_encoding = NULL;
if (media_add(conf->sc_mediatypes, &m) == NULL) {
log_warnx("failed to add default media \"%s\"",
m.media_name);
errors++;
}
}
}
return (errors ? -1 : 0);
}
int
symset(const char *nam, const char *val, int persist)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entry) {
if (strcmp(nam, sym->nam) == 0)
break;
}
if (sym != NULL) {
if (sym->persist == 1)
return (0);
else {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
}
if ((sym = calloc(1, sizeof(*sym))) == NULL)
return (-1);
sym->nam = strdup(nam);
if (sym->nam == NULL) {
free(sym);
return (-1);
}
sym->val = strdup(val);
if (sym->val == NULL) {
free(sym->nam);
free(sym);
return (-1);
}
sym->used = 0;
sym->persist = persist;
TAILQ_INSERT_TAIL(&symhead, sym, entry);
return (0);
}
int
cmdline_symset(char *s)
{
char *sym, *val;
int ret;
if ((val = strrchr(s, '=')) == NULL)
return (-1);
sym = strndup(s, val - s);
if (sym == NULL)
errx(1, "%s: strndup", __func__);
ret = symset(sym, val + 1, 1);
free(sym);
return (ret);
}
char *
symget(const char *nam)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entry) {
if (strcmp(nam, sym->nam) == 0) {
sym->used = 1;
return (sym->val);
}
}
return (NULL);
}
struct address *
host_v4(const char *s)
{
struct in_addr ina;
struct sockaddr_in *sain;
struct address *h;
memset(&ina, 0, sizeof(ina));
if (inet_pton(AF_INET, s, &ina) != 1)
return (NULL);
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(__func__);
sain = (struct sockaddr_in *)&h->ss;
sain->sin_len = sizeof(struct sockaddr_in);
sain->sin_family = AF_INET;
sain->sin_addr.s_addr = ina.s_addr;
if (sain->sin_addr.s_addr == INADDR_ANY)
h->prefixlen = 0; /* 0.0.0.0 address */
else
h->prefixlen = -1; /* host address */
return (h);
}
struct address *
host_v6(const char *s)
{
struct addrinfo hints, *res;
struct sockaddr_in6 *sa_in6;
struct address *h = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_DGRAM; /* dummy */
hints.ai_flags = AI_NUMERICHOST;
if (getaddrinfo(s, "0", &hints, &res) == 0) {
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(__func__);
sa_in6 = (struct sockaddr_in6 *)&h->ss;
sa_in6->sin6_len = sizeof(struct sockaddr_in6);
sa_in6->sin6_family = AF_INET6;
memcpy(&sa_in6->sin6_addr,
&((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
sizeof(sa_in6->sin6_addr));
sa_in6->sin6_scope_id =
((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
if (memcmp(&sa_in6->sin6_addr, &in6addr_any,
sizeof(sa_in6->sin6_addr)) == 0)
h->prefixlen = 0; /* any address */
else
h->prefixlen = -1; /* host address */
freeaddrinfo(res);
}
return (h);
}
int
host_dns(const char *s, struct addresslist *al, int max,
struct portrange *port, const char *ifname, int ipproto)
{
struct addrinfo hints, *res0, *res;
int error, cnt = 0;
struct sockaddr_in *sain;
struct sockaddr_in6 *sin6;
struct address *h;
if ((cnt = host_if(s, al, max, port, ifname, ipproto)) != 0)
return (cnt);
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM; /* DUMMY */
hints.ai_flags = AI_ADDRCONFIG;
error = getaddrinfo(s, NULL, &hints, &res0);
if (error == EAI_AGAIN || error == EAI_NODATA || error == EAI_NONAME)
return (0);
if (error) {
log_warnx("%s: could not parse \"%s\": %s", __func__, s,
gai_strerror(error));
return (-1);
}
for (res = res0; res && cnt < max; res = res->ai_next) {
if (res->ai_family != AF_INET &&
res->ai_family != AF_INET6)
continue;
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(__func__);
if (port != NULL)
memcpy(&h->port, port, sizeof(h->port));
if (ifname != NULL) {
if (strlcpy(h->ifname, ifname, sizeof(h->ifname)) >=
sizeof(h->ifname))
log_warnx("%s: interface name truncated",
__func__);
freeaddrinfo(res0);
free(h);
return (-1);
}
if (ipproto != -1)
h->ipproto = ipproto;
h->ss.ss_family = res->ai_family;
h->prefixlen = -1; /* host address */
if (res->ai_family == AF_INET) {
sain = (struct sockaddr_in *)&h->ss;
sain->sin_len = sizeof(struct sockaddr_in);
sain->sin_addr.s_addr = ((struct sockaddr_in *)
res->ai_addr)->sin_addr.s_addr;
} else {
sin6 = (struct sockaddr_in6 *)&h->ss;
sin6->sin6_len = sizeof(struct sockaddr_in6);
memcpy(&sin6->sin6_addr, &((struct sockaddr_in6 *)
res->ai_addr)->sin6_addr, sizeof(struct in6_addr));
}
TAILQ_INSERT_HEAD(al, h, entry);
cnt++;
}
if (cnt == max && res) {
log_warnx("%s: %s resolves to more than %d hosts", __func__,
s, max);
}
freeaddrinfo(res0);
return (cnt);
}
int
host_if(const char *s, struct addresslist *al, int max,
struct portrange *port, const char *ifname, int ipproto)
{
struct ifaddrs *ifap, *p;
struct sockaddr_in *sain;
struct sockaddr_in6 *sin6;
struct address *h;
int cnt = 0, af;
if (getifaddrs(&ifap) == -1)
fatal("getifaddrs");
/* First search for IPv4 addresses */
af = AF_INET;
nextaf:
for (p = ifap; p != NULL && cnt < max; p = p->ifa_next) {
if (p->ifa_addr == NULL ||
p->ifa_addr->sa_family != af ||
(strcmp(s, p->ifa_name) != 0 &&
!is_if_in_group(p->ifa_name, s)))
continue;
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal("calloc");
if (port != NULL)
memcpy(&h->port, port, sizeof(h->port));
if (ifname != NULL) {
if (strlcpy(h->ifname, ifname, sizeof(h->ifname)) >=
sizeof(h->ifname))
log_warnx("%s: interface name truncated",
__func__);
freeifaddrs(ifap);
free(h);
return (-1);
}
if (ipproto != -1)
h->ipproto = ipproto;
h->ss.ss_family = af;
h->prefixlen = -1; /* host address */
if (af == AF_INET) {
sain = (struct sockaddr_in *)&h->ss;
sain->sin_len = sizeof(struct sockaddr_in);
sain->sin_addr.s_addr = ((struct sockaddr_in *)
p->ifa_addr)->sin_addr.s_addr;
} else {
sin6 = (struct sockaddr_in6 *)&h->ss;
sin6->sin6_len = sizeof(struct sockaddr_in6);
memcpy(&sin6->sin6_addr, &((struct sockaddr_in6 *)
p->ifa_addr)->sin6_addr, sizeof(struct in6_addr));
sin6->sin6_scope_id = ((struct sockaddr_in6 *)
p->ifa_addr)->sin6_scope_id;
}
TAILQ_INSERT_HEAD(al, h, entry);
cnt++;
}
if (af == AF_INET) {
/* Next search for IPv6 addresses */
af = AF_INET6;
goto nextaf;
}
if (cnt > max) {
log_warnx("%s: %s resolves to more than %d hosts", __func__,
s, max);
}
freeifaddrs(ifap);
return (cnt);
}
int
host(const char *s, struct addresslist *al, int max,
struct portrange *port, const char *ifname, int ipproto)
{
struct address *h;
h = host_v4(s);
/* IPv6 address? */
if (h == NULL)
h = host_v6(s);
if (h != NULL) {
if (port != NULL)
memcpy(&h->port, port, sizeof(h->port));
if (ifname != NULL) {
if (strlcpy(h->ifname, ifname, sizeof(h->ifname)) >=
sizeof(h->ifname)) {
log_warnx("%s: interface name truncated",
__func__);
free(h);
return (-1);
}
}
if (ipproto != -1)
h->ipproto = ipproto;
TAILQ_INSERT_HEAD(al, h, entry);
return (1);
}
return (host_dns(s, al, max, port, ifname, ipproto));
}
struct server *
server_inherit(struct server *src, struct server_config *alias,
struct server_config *addr)
{
struct server *dst, *s, *dstl;
if ((dst = calloc(1, sizeof(*dst))) == NULL)
fatal("out of memory");
/* Copy the source server and assign a new Id */
memcpy(&dst->srv_conf, &src->srv_conf, sizeof(dst->srv_conf));
if ((dst->srv_conf.tls_cert_file =
strdup(src->srv_conf.tls_cert_file)) == NULL)
fatal("out of memory");
if ((dst->srv_conf.tls_key_file =
strdup(src->srv_conf.tls_key_file)) == NULL)
fatal("out of memory");
if (src->srv_conf.tls_ocsp_staple_file != NULL) {
if ((dst->srv_conf.tls_ocsp_staple_file =
strdup(src->srv_conf.tls_ocsp_staple_file)) == NULL)
fatal("out of memory");
}
if (src->srv_conf.return_uri != NULL &&
(dst->srv_conf.return_uri =
strdup(src->srv_conf.return_uri)) == NULL)
fatal("out of memory");
dst->srv_conf.id = ++last_server_id;
dst->srv_conf.parent_id = dst->srv_conf.id;
dst->srv_s = -1;
if (last_server_id == INT_MAX) {
yyerror("too many servers defined");
serverconfig_free(&dst->srv_conf);
free(dst);
return (NULL);
}
/* Now set alias and listen address */
strlcpy(dst->srv_conf.name, alias->name, sizeof(dst->srv_conf.name));
memcpy(&dst->srv_conf.ss, &addr->ss, sizeof(dst->srv_conf.ss));
dst->srv_conf.port = addr->port;
dst->srv_conf.prefixlen = addr->prefixlen;
if (addr->flags & SRVFLAG_TLS)
dst->srv_conf.flags |= SRVFLAG_TLS;
else
dst->srv_conf.flags &= ~SRVFLAG_TLS;
/* Don't inherit the "match" option, use it from the alias */
dst->srv_conf.flags &= ~SRVFLAG_SERVER_MATCH;
dst->srv_conf.flags |= (alias->flags & SRVFLAG_SERVER_MATCH);
if (server_tls_load_keypair(dst) == -1)
log_warnx("%s:%d: server \"%s\": failed to "
"load public/private keys", file->name,
yylval.lineno, dst->srv_conf.name);
if (server_tls_load_ca(dst) == -1) {
yyerror("failed to load ca cert(s) for server %s",
dst->srv_conf.name);
serverconfig_free(&dst->srv_conf);
return NULL;
}
if (server_tls_load_crl(dst) == -1) {
yyerror("failed to load crl(s) for server %s",
dst->srv_conf.name);
serverconfig_free(&dst->srv_conf);
free(dst);
return NULL;
}
if (server_tls_load_ocsp(dst) == -1) {
yyerror("failed to load ocsp staple "
"for server %s", dst->srv_conf.name);
serverconfig_free(&dst->srv_conf);
free(dst);
return (NULL);
}
/* Check if the new server already exists */
if (server_match(dst, 1) != NULL) {
yyerror("server \"%s\" defined twice",
dst->srv_conf.name);
serverconfig_free(&dst->srv_conf);
free(dst);
return (NULL);
}
/* Copy all the locations of the source server */
TAILQ_FOREACH(s, conf->sc_servers, srv_entry) {
if (!(s->srv_conf.flags & SRVFLAG_LOCATION &&
s->srv_conf.parent_id == src->srv_conf.parent_id))
continue;
if ((dstl = calloc(1, sizeof(*dstl))) == NULL)
fatal("out of memory");
memcpy(&dstl->srv_conf, &s->srv_conf, sizeof(dstl->srv_conf));
strlcpy(dstl->srv_conf.name, alias->name,
sizeof(dstl->srv_conf.name));
/* Copy the new Id and listen address */
dstl->srv_conf.id = ++last_server_id;
dstl->srv_conf.parent_id = dst->srv_conf.id;
memcpy(&dstl->srv_conf.ss, &addr->ss,
sizeof(dstl->srv_conf.ss));
dstl->srv_conf.port = addr->port;
dstl->srv_conf.prefixlen = addr->prefixlen;
dstl->srv_s = -1;
DPRINTF("adding location \"%s\" for \"%s[%u]\"",
dstl->srv_conf.location,
dstl->srv_conf.name, dstl->srv_conf.id);
TAILQ_INSERT_TAIL(conf->sc_servers, dstl, srv_entry);
}
return (dst);
}
int
listen_on(const char *addr, int tls, struct portrange *port)
{
struct addresslist al;
struct address *h;
struct server_config *s_conf, *alias = NULL;
if (parentsrv != NULL) {
yyerror("listen %s inside location", addr);
return (-1);
}
TAILQ_INIT(&al);
if (strcmp("*", addr) == 0) {
if (host("0.0.0.0", &al, 1, port, NULL, -1) <= 0) {
yyerror("invalid listen ip: %s",
"0.0.0.0");
return (-1);
}
if (host("::", &al, 1, port, NULL, -1) <= 0) {
yyerror("invalid listen ip: %s", "::");
return (-1);
}
} else {
if (host(addr, &al, HTTPD_MAX_ALIAS_IP, port, NULL,
-1) <= 0) {
yyerror("invalid listen ip: %s", addr);
return (-1);
}
}
while ((h = TAILQ_FIRST(&al)) != NULL) {
if (srv->srv_conf.ss.ss_family != AF_UNSPEC) {
if ((alias = calloc(1,
sizeof(*alias))) == NULL)
fatal("out of memory");
/* Add as an IP-based alias. */
s_conf = alias;
} else
s_conf = &srv->srv_conf;
memcpy(&s_conf->ss, &h->ss, sizeof(s_conf->ss));
s_conf->prefixlen = h->prefixlen;
/* Set the default port to 80 or 443 */
if (!h->port.op)
s_conf->port = htons(tls ?
HTTPS_PORT : HTTP_PORT);
else
s_conf->port = h->port.val[0];
if (tls)
s_conf->flags |= SRVFLAG_TLS;
if (alias != NULL) {
/*
* IP-based; use name match flags from
* parent
*/
alias->flags &= ~SRVFLAG_SERVER_MATCH;
alias->flags |= srv->srv_conf.flags &
SRVFLAG_SERVER_MATCH;
TAILQ_INSERT_TAIL(&srv->srv_hosts,
alias, entry);
}
TAILQ_REMOVE(&al, h, entry);
free(h);
}
return (0);
}
int
getservice(char *n)
{
struct servent *s;
const char *errstr;
long long llval;
llval = strtonum(n, 0, UINT16_MAX, &errstr);
if (errstr) {
s = getservbyname(n, "tcp");
if (s == NULL)
s = getservbyname(n, "udp");
if (s == NULL)
return (-1);
return (s->s_port);
}
return (htons((unsigned short)llval));
}
int
is_if_in_group(const char *ifname, const char *groupname)
{
unsigned int len;
struct ifgroupreq ifgr;
struct ifg_req *ifg;
int s;
int ret = 0;
if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
err(1, "socket");
memset(&ifgr, 0, sizeof(ifgr));
if (strlcpy(ifgr.ifgr_name, ifname, IFNAMSIZ) >= IFNAMSIZ)
err(1, "IFNAMSIZ");
if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
if (errno == EINVAL || errno == ENOTTY)
goto end;
err(1, "SIOCGIFGROUP");
}
len = ifgr.ifgr_len;
ifgr.ifgr_groups = calloc(len / sizeof(struct ifg_req),
sizeof(struct ifg_req));
if (ifgr.ifgr_groups == NULL)
err(1, "getifgroups");
if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
err(1, "SIOCGIFGROUP");
ifg = ifgr.ifgr_groups;
for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
len -= sizeof(struct ifg_req);
if (strcmp(ifg->ifgrq_group, groupname) == 0) {
ret = 1;
break;
}
}
free(ifgr.ifgr_groups);
end:
close(s);
return (ret);
}
int
get_fastcgi_dest(struct server_config *xsrv_conf, const char *node, char *port)
{
struct addrinfo hints, *res;
int s;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if ((s = getaddrinfo(node, port, &hints, &res)) != 0) {
yyerror("getaddrinfo: %s\n", gai_strerror(s));
return -1;
}
memset(&(xsrv_conf)->fastcgi_ss, 0, sizeof(xsrv_conf->fastcgi_ss));
memcpy(&(xsrv_conf)->fastcgi_ss, res->ai_addr, res->ai_addrlen);
freeaddrinfo(res);
return (0);
}
void
remove_locations(struct server_config *xsrv_conf)
{
struct server *s, *next;
TAILQ_FOREACH_SAFE(s, conf->sc_servers, srv_entry, next) {
if (!(s->srv_conf.flags & SRVFLAG_LOCATION &&
s->srv_conf.parent_id == xsrv_conf->parent_id))
continue;
TAILQ_REMOVE(conf->sc_servers, s, srv_entry);
serverconfig_free(&s->srv_conf);
free(s);
}
}
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