/*

* OpenConnect (SSL + DTLS) VPN client

*

* Copyright © 2008 Nick Andrew <nick@nick-andrew.net>

*

* Author: David Woodhouse <dwmw2@infradead.org>

*

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU Lesser General Public License

* version 2.1, as published by the Free Software Foundation.

*

* This program is distributed in the hope that it will be useful, but

* WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public

* License along with this library; if not, write to:

*

* Free Software Foundation, Inc.

* 51 Franklin Street, Fifth Floor,

* Boston, MA 02110-1301 USA

*/

#ifndef __OPENCONNECT_INTERNAL_H__

#define __OPENCONNECT_INTERNAL_H__

#include "openconnect.h"

/* Ick */

#if OPENSSL_VERSION_NUMBER >= 0x00909000L

#define method_const const

#else

#define method_const

#endif /* OPENSSL */

#ifdef HAVE_TROUSERS

#include <trousers/tss.h>

#include <trousers/trousers.h>

#endif

#endif

#include <zlib.h>

#include <stdint.h>

#include <sys/socket.h>

#include <sys/select.h>

#include <sys/time.h>

#include <sys/types.h>

#include <unistd.h>

#include LIBPROXY_HDR

#endif

#ifdef LIBSTOKEN_HDR

#include LIBSTOKEN_HDR

#endif

#else

#define _(s) s

#endif

#include <libxml/tree.h>

/****************************************************************************/

struct pkt {

int len;

struct pkt *next;

unsigned char hdr[8];

unsigned char data[];

};

struct vpn_option {

char *option;

char *value;

struct vpn_option *next;

};

#define KA_NONE 0

#define KA_DPD 1

#define KA_DPD_DEAD 2

#define KA_KEEPALIVE 3

#define KA_REKEY 4

struct keepalive_info {

int dpd;

int keepalive;

int rekey;

time_t last_rekey;

time_t last_tx;

time_t last_rx;

time_t last_dpd;

};

struct split_include {

char *route;

struct split_include *next;

};

struct pin_cache {

struct pin_cache *next;

char *token;

char *pin;

};

#define RECONNECT_INTERVAL_MIN 10

#define RECONNECT_INTERVAL_MAX 100

#define CERT_TYPE_UNKNOWN 0

#define CERT_TYPE_PEM 1

#define CERT_TYPE_PKCS12 2

#define CERT_TYPE_TPM 3

#define REDIR_TYPE_NONE 0

#define REDIR_TYPE_NEWHOST 1

#define REDIR_TYPE_LOCAL 2

struct openconnect_info {

char *redirect_url;

char *csd_token;

char *csd_ticket;

char *csd_stuburl;

char *csd_starturl;

char *csd_waiturl;

char *csd_preurl;

char *csd_scriptname;

pxProxyFactory *proxy_factory;

#endif

char *proxy_type;

char *proxy;

int proxy_port;

const char *localname;

char *hostname;

int port;

char *urlpath;

const char *cert;

const char *sslkey;

int cert_type;

char *cert_password;

const char *cafile;

const char *servercert;

const char *xmlconfig;

char *username;

char *password;

char *authgroup;

int nopasswd;

char *dtls_ciphers;

uid_t uid_csd;

char *csd_wrapper;

int uid_csd_given;

int no_http_keepalive;

#ifdef LIBSTOKEN_HDR

struct stoken_ctx *stoken_ctx;

#endif

int use_stoken;

int stoken_bypassed;

int stoken_tries;

time_t stoken_time;

char *stoken_pin;

struct vpn_option *cookies;

struct vpn_option *cstp_options;

struct vpn_option *dtls_options;

#if defined(OPENCONNECT_OPENSSL)

X509 *cert_x509;

SSL_CTX *https_ctx;

SSL *https_ssl;

#elif defined(OPENCONNECT_GNUTLS)

gnutls_session_t https_sess;

gnutls_certificate_credentials_t https_cred;

#ifdef HAVE_TROUSERS

TSS_HCONTEXT tpm_context;

TSS_HKEY srk;

TSS_HPOLICY srk_policy;

TSS_HKEY tpm_key;

#ifndef HAVE_GNUTLS_CERTIFICATE_SET_KEY

#ifdef HAVE_P11KIT

gnutls_pkcs11_privkey_t my_p11key;

gnutls_privkey_t my_pkey;

gnutls_x509_crt_t *my_certs;

unsigned int nr_my_certs;

#endif

#endif /* OPENCONNECT_GNUTLS */

struct keepalive_info ssl_times;

int owe_ssl_dpd_response;

struct pkt *deflate_pkt;

struct pkt *current_ssl_pkt;

z_stream inflate_strm;

uint32_t inflate_adler32;

z_stream deflate_strm;

uint32_t deflate_adler32;

int disable_ipv6;

int reconnect_timeout;

int reconnect_interval;

int dtls_attempt_period;

time_t new_dtls_started;

SSL_CTX *dtls_ctx;

SSL *dtls_ssl;

SSL *new_dtls_ssl;

SSL_SESSION *dtls_session;

/* Call these *_ssl rather than *_sess because they're just

pointers, and generic code (in mainloop.c for example)

wants to check if they're NULL or not. No point in being

differently named to the OpenSSL variant, and forcing us to

have ifdefs or accessor macros for them. */

gnutls_session_t dtls_ssl;

gnutls_session_t new_dtls_ssl;

struct keepalive_info dtls_times;

unsigned char dtls_session_id[32];

unsigned char dtls_secret[48];

char *dtls_cipher;

int script_tun;

char *ifname;

int actual_mtu;

int reqmtu, basemtu;

const char *banner;

const char *vpn_addr;

const char *vpn_netmask;

const char *vpn_addr6;

const char *vpn_netmask6;

const char *vpn_dns[3];

const char *vpn_nbns[3];

const char *vpn_domain;

const char *vpn_proxy_pac;

struct split_include *split_includes;

struct split_include *split_excludes;

int select_nfds;

fd_set select_rfds;

fd_set select_wfds;

fd_set select_efds;

#ifdef __sun__

int ip_fd;

#endif

int tun_fd;

int ssl_fd;

int dtls_fd;

int new_dtls_fd;

struct pkt *incoming_queue;

struct pkt *outgoing_queue;

int outgoing_qlen;

int max_qlen;

socklen_t peer_addrlen;

struct sockaddr *peer_addr;

struct sockaddr *dtls_addr;

int dtls_local_port;

int deflate;

char *useragent;

void *cbdata;

openconnect_validate_peer_cert_vfn validate_peer_cert;

openconnect_write_new_config_vfn write_new_config;

openconnect_process_auth_form_vfn process_auth_form;

openconnect_progress_vfn progress;

};

#if (defined(DTLS_OPENSSL) && defined(SSL_OP_CISCO_ANYCONNECT)) || \

(defined(DTLS_GNUTLS) && defined(HAVE_GNUTLS_SESSION_SET_PREMASTER))

#define HAVE_DTLS 1

#endif

/* Packet types */

#define AC_PKT_DATA 0 /* Uncompressed data */

#define AC_PKT_DPD_OUT 3 /* Dead Peer Detection */

#define AC_PKT_DPD_RESP 4 /* DPD response */

#define AC_PKT_DISCONN 5 /* Client disconnection notice */

#define AC_PKT_KEEPALIVE 7 /* Keepalive */

#define AC_PKT_COMPRESSED 8 /* Compressed data */

#define AC_PKT_TERM_SERVER 9 /* Server kick */

#define vpn_progress(vpninfo, ...) (vpninfo)->progress ((vpninfo)->cbdata, __VA_ARGS__)

/****************************************************************************/

/* Oh Solaris how we hate thee! */

#ifdef __sun__

#define time(x) openconnect__time(x)

time_t openconnect__time(time_t *t);

#endif

#ifndef HAVE_ASPRINTF

#define asprintf openconnect__asprintf

int openconnect__asprintf(char **strp, const char *fmt, ...);

#endif

#ifndef HAVE_GETLINE

#define getline openconnect__getline

ssize_t openconnect__getline(char **lineptr, size_t *n, FILE *stream);

#endif

#ifndef HAVE_STRCASESTR

#define strcasestr openconnect__strcasestr

char *openconnect__strcasestr(const char *haystack, const char *needle);

#endif

/* I always coded as if it worked like this. Now it does. */

#define realloc_inplace(p, size) do { \

void *__realloc_old = p; \

p = realloc(p, size); \

if (size && !p) \

free(__realloc_old); \

} while (0)

/****************************************************************************/

/* tun.c */

int setup_tun(struct openconnect_info *vpninfo);

int tun_mainloop(struct openconnect_info *vpninfo, int *timeout);

void shutdown_tun(struct openconnect_info *vpninfo);

/* dtls.c */

unsigned char unhex(const char *data);

int setup_dtls(struct openconnect_info *vpninfo);

int dtls_mainloop(struct openconnect_info *vpninfo, int *timeout);

int dtls_try_handshake(struct openconnect_info *vpninfo);

int connect_dtls_socket(struct openconnect_info *vpninfo);

/* cstp.c */

int make_cstp_connection(struct openconnect_info *vpninfo);

int cstp_mainloop(struct openconnect_info *vpninfo, int *timeout);

int cstp_reconnect(struct openconnect_info *vpninfo);

/* ssl.c */

int openconnect_print_err_cb(const char *str, size_t len, void *ptr);

#define openconnect_report_ssl_errors(v) ERR_print_errors_cb(openconnect_print_err_cb, (v))

#define ANDROID_KEYSTORE

#endif

#ifdef ANDROID_KEYSTORE

int keystore_fetch(const char *key, unsigned char **result);

#endif

/* ${SSL_LIBRARY}.c */

int openconnect_local_cert_md5(struct openconnect_info *vpninfo,

char *buf);

/* mainloop.c */

int vpn_add_pollfd(struct openconnect_info *vpninfo, int fd, short events);

int vpn_mainloop(struct openconnect_info *vpninfo);

int queue_new_packet(struct pkt **q, void *buf, int len);

void queue_packet(struct pkt **q, struct pkt *new);

int keepalive_action(struct keepalive_info *ka, int *timeout);

extern int killed;

/* xml.c */

int config_lookup_host(struct openconnect_info *vpninfo, const char *host);

/* auth.c */

int parse_xml_response(struct openconnect_info *vpninfo, char *response, struct oc_auth_form **form);

int handle_auth_form(struct openconnect_info *vpninfo, struct oc_auth_form *form,

char *request_body, int req_len, const char **method,

/* http.c */

int internal_parse_url(char *url, char **res_proto, char **res_host,

int *res_port, char **res_path, int default_port);

/* ssl_ui.c */

int set_openssl_ui(void);

/* version.c */

#endif /* __OPENCONNECT_INTERNAL_H__ */