transmission/third-party/shttpd/config.c

308 lines
8.7 KiB
C

/*
* Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com>
* All rights reserved
*
* "THE BEER-WARE LICENSE" (Revision 42):
* Sergey Lyubka wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return.
*/
#include "defs.h"
static int isbyte(int n) { return (n >= 0 && n <= 255); }
static void
set_acl(struct shttpd_ctx *ctx, const char *s)
{
struct acl *acl = NULL;
char flag;
int len, a, b, c, d, n, mask;
struct llhead *lp, *tmp;
/* Delete the old ACLs if any */
LL_FOREACH_SAFE(&ctx->acl, lp, tmp)
free(LL_ENTRY(lp, struct acl, link));
FOR_EACH_WORD_IN_LIST(s, len) {
mask = 32;
if (sscanf(s, "%c%d.%d.%d.%d%n",&flag,&a,&b,&c,&d,&n) != 5) {
elog(E_FATAL, NULL, "[%s]: subnet must be "
"[+|-]x.x.x.x[/x]", s);
} else if (flag != '+' && flag != '-') {
elog(E_FATAL, NULL, "flag must be + or -: [%s]", s);
} else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
elog(E_FATAL, NULL, "bad ip address: [%s]", s);
} else if ((acl = malloc(sizeof(*acl))) == NULL) {
elog(E_FATAL, NULL, "%s", "cannot malloc subnet");
} else if (sscanf(s + n, "/%d", &mask) == 0) {
/* Do nothing, no mask specified */
} else if (mask < 0 || mask > 32) {
elog(E_FATAL, NULL, "bad subnet mask: %d [%s]", n, s);
}
acl->ip = (a << 24) | (b << 16) | (c << 8) | d;
acl->mask = mask ? 0xffffffffU << (32 - mask) : 0;
acl->flag = flag;
LL_TAIL(&ctx->acl, &acl->link);
}
}
#ifndef NO_SSL
/*
* Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
*/
static void
set_ssl(struct shttpd_ctx *ctx, const char *pem)
{
SSL_CTX *CTX;
void *lib;
struct ssl_func *fp;
/* Load SSL library dynamically */
if ((lib = dlopen(SSL_LIB, RTLD_LAZY)) == NULL)
elog(E_FATAL, NULL, "set_ssl: cannot load %s", SSL_LIB);
for (fp = ssl_sw; fp->name != NULL; fp++)
if ((fp->ptr.v_void = dlsym(lib, fp->name)) == NULL)
elog(E_FATAL, NULL,"set_ssl: cannot find %s", fp->name);
/* Initialize SSL crap */
SSL_library_init();
if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL)
elog(E_FATAL, NULL, "SSL_CTX_new error");
else if (SSL_CTX_use_certificate_file(CTX, pem, SSL_FILETYPE_PEM) == 0)
elog(E_FATAL, NULL, "cannot open %s", pem);
else if (SSL_CTX_use_PrivateKey_file(CTX, pem, SSL_FILETYPE_PEM) == 0)
elog(E_FATAL, NULL, "cannot open %s", pem);
ctx->ssl_ctx = CTX;
}
#endif /* NO_SSL */
static void
open_log_file(FILE **fpp, const char *path)
{
if (*fpp != NULL)
(void) fclose(*fpp);
if (path == NULL) {
*fpp = NULL;
} else if ((*fpp = fopen(path, "a")) == NULL) {
elog(E_FATAL, NULL, "cannot open log file %s: %s",
path, strerror(errno));
}
}
static void
set_alog(struct shttpd_ctx *ctx, const char *path)
{
open_log_file(&ctx->access_log, path);
}
static void
set_elog(struct shttpd_ctx *ctx, const char *path)
{
open_log_file(&ctx->error_log, path);
}
static void show_cfg_page(struct shttpd_arg *arg);
static void
set_cfg_uri(struct shttpd_ctx *ctx, const char *uri)
{
free_list(&ctx->registered_uris, &registered_uri_destructor);
if (uri != NULL) {
shttpd_register_uri(ctx, uri, &show_cfg_page, ctx);
}
}
static void
set_ports(struct shttpd_ctx *ctx, const char *p)
{
int len, is_ssl;
free_list(&ctx->listeners, &listener_destructor);
FOR_EACH_WORD_IN_LIST(p, len) {
is_ssl = p[len - 1] == 's' ? 1 : 0;
if (shttpd_listen(ctx, atoi(p), is_ssl) == -1)
elog(E_FATAL, NULL,
"Cannot open socket on port %d", atoi(p));
}
}
static const struct opt {
int index; /* Index in shttpd_ctx */
const char *name; /* Option name in config file */
const char *description; /* Description */
const char *default_value; /* Default option value */
void (*setter)(struct shttpd_ctx *, const char *);
} known_options[] = {
{OPT_ROOT, "root", "\tWeb root directory", ".", NULL},
{OPT_INDEX_FILES, "index_files", "Index files", INDEX_FILES, NULL},
{OPT_PORTS, "ports", "Listening ports", LISTENING_PORTS, set_ports},
{OPT_DIR_LIST, "dir_list", "Directory listing", "1", NULL},
{OPT_CFG_URI, "cfg_uri", "Config uri", NULL, set_cfg_uri},
{OPT_PROTECT, "protect", "URI to htpasswd mapping", NULL, NULL},
#ifndef NO_CGI
{OPT_CGI_EXTENSIONS, "cgi_ext", "CGI extensions", CGI_EXT, NULL},
{OPT_CGI_INTERPRETER, "cgi_interp", "CGI interpreter", NULL, NULL},
{OPT_CGI_ENVIRONMENT, "cgi_env", "Additional CGI env vars", NULL, NULL},
#endif /* NO_CGI */
{OPT_SSI_EXTENSIONS, "ssi_ext", "SSI extensions", SSI_EXT, NULL},
#ifndef NO_AUTH
{OPT_AUTH_REALM, "auth_realm", "Authentication domain name",REALM,NULL},
{OPT_AUTH_GPASSWD, "auth_gpass", "Global passwords file", NULL, NULL},
{OPT_AUTH_PUT, "auth_PUT", "PUT,DELETE auth file", NULL, NULL},
#endif /* !NO_AUTH */
{OPT_ACCESS_LOG, "access_log", "Access log file", NULL, set_alog},
{OPT_ERROR_LOG, "error_log", "Error log file", NULL, set_elog},
{OPT_MIME_TYPES, "mime_types", "Additional mime types list", NULL,NULL},
#ifndef NO_SSL
{OPT_SSL_CERTIFICATE, "ssl_cert", "SSL certificate file", NULL,set_ssl},
#endif /* NO_SSL */
{OPT_ALIASES, "aliases", "Path=URI mappings", NULL, NULL},
{OPT_ACL, "acl", "\tAllow/deny IP addresses/subnets", NULL, set_acl},
#ifdef _WIN32
#else
{OPT_INETD, "inetd", "Inetd mode", "0", NULL},
{OPT_UID, "uid", "\tRun as user", NULL, NULL},
#endif /* _WIN32 */
{-1, NULL, NULL, NULL, NULL}
};
void shttpd_set_option(struct shttpd_ctx *ctx, const char *opt, const char *val)
{
const struct opt *o;
for (o = known_options; o->name != NULL; o++)
if (!strcmp(opt, o->name))
break;
if (o->name == NULL)
elog(E_FATAL, NULL, "no such option: [%s]", opt);
/* Call option setter first, so it can use both new and old values */
if (o->setter != NULL)
o->setter(ctx, val);
/* Free old value if any */
if (ctx->options[o->index] != NULL)
free(ctx->options[o->index]);
/* Set new option value */
ctx->options[o->index] = val ? my_strdup(val) : NULL;
}
static void
show_cfg_page(struct shttpd_arg *arg)
{
struct shttpd_ctx *ctx = arg->user_data;
char opt_name[20], value[BUFSIZ];
const struct opt *o;
opt_name[0] = value[0] = '\0';
if (!strcmp(shttpd_get_env(arg, "REQUEST_METHOD"), "POST")) {
if (arg->flags & SHTTPD_MORE_POST_DATA)
return;
(void) shttpd_get_var("o", arg->in.buf, arg->in.len,
opt_name, sizeof(opt_name));
(void) shttpd_get_var("v", arg->in.buf, arg->in.len,
value, sizeof(value));
shttpd_set_option(ctx, opt_name, value[0] ? value : NULL);
}
shttpd_printf(arg, "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n"
"<html><body><h1>SHTTPD v. %s</h1>", shttpd_version());
shttpd_printf(arg, "%s", "<table border=1"
"<tr><th>Option</th><th>Description</th>"
"<th colspan=2>Value</th></tr>");
if (opt_name[0] != '\0' && value[0] != '\0')
shttpd_printf(arg, "<p style='color: green'>Saved: %s=%s</p>",
opt_name, value[0] ? value : "NULL");
for (o = known_options; o->name != NULL; o++) {
shttpd_printf(arg,
"<form method=post><tr><td>%s</td><td>%s</td>"
"<input type=hidden name=o value='%s'>"
"<td><input type=text name=v value='%s'></td>"
"<td><input type=submit value=save></td></form></tr>",
o->name, o->description, o->name,
ctx->options[o->index] ? ctx->options[o->index] : "");
}
shttpd_printf(arg, "%s", "</table></body></html>");
arg->flags |= SHTTPD_END_OF_OUTPUT;
}
/*
* Show usage string and exit.
*/
void
usage(const char *prog)
{
const struct opt *o;
(void) fprintf(stderr,
"SHTTPD version %s (c) Sergey Lyubka\n"
"usage: %s [options] [config_file]\n", VERSION, prog);
#if !defined(NO_AUTH)
fprintf(stderr, " -A <htpasswd_file> <realm> <user> <passwd>\n");
#endif /* NO_AUTH */
for (o = known_options; o->name != NULL; o++) {
(void) fprintf(stderr, " -%s\t%s", o->name, o->description);
if (o->default_value != NULL)
fprintf(stderr, " (default: %s)", o->default_value);
fputc('\n', stderr);
}
exit(EXIT_FAILURE);
}
struct shttpd_ctx *shttpd_init(void)
{
struct shttpd_ctx *ctx;
struct tm *tm;
const struct opt *o;
if ((ctx = calloc(1, sizeof(*ctx))) == NULL)
elog(E_FATAL, NULL, "cannot allocate shttpd context");
/* Set default values */
for (o = known_options; o->name != NULL; o++) {
ctx->options[o->index] = o->default_value == NULL ?
NULL : my_strdup(o->default_value);
}
current_time = ctx->start_time = time(NULL);
tm = localtime(&current_time);
tz_offset = 0;
#if 0
tm->tm_gmtoff - 3600 * (tm->tm_isdst > 0 ? 1 : 0);
#endif
InitializeCriticalSection(&ctx->mutex);
LL_INIT(&ctx->connections);
LL_INIT(&ctx->registered_uris);
LL_INIT(&ctx->error_handlers);
LL_INIT(&ctx->acl);
LL_INIT(&ctx->ssi_funcs);
LL_INIT(&ctx->listeners);
#ifdef _WIN32
{WSADATA data; WSAStartup(MAKEWORD(2,2), &data);}
#endif /* _WIN32 */
return (ctx);
}