openconnect-internal.h

   1 /*
   2  * OpenConnect (SSL + DTLS) VPN client
   3  *
   4  * Copyright © 2008-2011 Intel Corporation.
   5  * Copyright © 2008 Nick Andrew <nick@nick-andrew.net>
   6  *
   7  * Author: David Woodhouse <dwmw2@infradead.org>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public License
  11  * version 2.1, as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to:
  20  *
  21  *   Free Software Foundation, Inc.
  22  *   51 Franklin Street, Fifth Floor,
  23  *   Boston, MA 02110-1301 USA
  24  */
  25
  26 #ifndef __OPENCONNECT_INTERNAL_H__
  27 #define __OPENCONNECT_INTERNAL_H__
  28
  29 #include "openconnect.h"
  30
  31 #include <openssl/ssl.h>
  32 #include <zlib.h>
  33 #include <stdint.h>
  34 #include <sys/socket.h>
  35 #include <sys/select.h>
  36 #include <sys/time.h>
  37 #include <sys/types.h>
  38 #include <unistd.h>
  39 #ifdef LIBPROXY_HDR
  40 #include LIBPROXY_HDR
  41 #endif
  42 #ifdef ENABLE_NLS
  43 #include <locale.h>
  44 #include <libintl.h>
  45 #define _(s) dgettext("openconnect", s)
  46 #else
  47 #define _(s) s
  48 #endif
  49 #define N_(s) s
  50
  51 /****************************************************************************/
  52
  53 struct pkt {
  54         int len;
  55         struct pkt *next;
  56         unsigned char hdr[8];
  57         unsigned char data[];
  58 };
  59
  60 struct vpn_option {
  61         char *option;
  62         char *value;
  63         struct vpn_option *next;
  64 };
  65
  66 #define KA_NONE         0
  67 #define KA_DPD          1
  68 #define KA_DPD_DEAD     2
  69 #define KA_KEEPALIVE    3
  70 #define KA_REKEY        4
  71
  72 struct keepalive_info {
  73         int dpd;
  74         int keepalive;
  75         int rekey;
  76         time_t last_rekey;
  77         time_t last_tx;
  78         time_t last_rx;
  79         time_t last_dpd;
  80 };
  81
  82 struct split_include {
  83         char *route;
  84         struct split_include *next;
  85 };
  86
  87 #define RECONNECT_INTERVAL_MIN  10
  88 #define RECONNECT_INTERVAL_MAX  100
  89
  90 #define CERT_TYPE_UNKNOWN       0
  91 #define CERT_TYPE_PEM           1
  92 #define CERT_TYPE_PKCS12        2
  93 #define CERT_TYPE_TPM           3
  94
  95 struct openconnect_info {
  96         char *redirect_url;
  97
  98         char *csd_token;
  99         char *csd_ticket;
 100         char *csd_stuburl;
 101         char *csd_starturl;
 102         char *csd_waiturl;
 103         char *csd_preurl;
 104
 105         char *csd_scriptname;
 106
 107 #ifdef LIBPROXY_HDR
 108         pxProxyFactory *proxy_factory;
 109 #endif
 110         char *proxy_type;
 111         char *proxy;
 112         int proxy_port;
 113
 114         const char *localname;
 115         char *hostname;
 116         int port;
 117         char *urlpath;
 118         int cert_expire_warning;
 119         const char *cert;
 120         const char *sslkey;
 121         X509 *cert_x509;
 122         int cert_type;
 123         char *cert_password;
 124         const char *cafile;
 125         const char *servercert;
 126         const char *xmlconfig;
 127         char xmlsha1[(SHA_DIGEST_LENGTH * 2) + 1];
 128         char *username;
 129         char *password;
 130         char *authgroup;
 131         int nopasswd;
 132         char *dtls_ciphers;
 133         uid_t uid_csd;
 134         char *csd_wrapper;
 135         int uid_csd_given;
 136         int no_http_keepalive;
 137
 138         char *cookie; /* Pointer to within cookies list */
 139         struct vpn_option *cookies;
 140         struct vpn_option *cstp_options;
 141         struct vpn_option *dtls_options;
 142
 143         SSL_CTX *https_ctx;
 144         SSL *https_ssl;
 145         struct keepalive_info ssl_times;
 146         int owe_ssl_dpd_response;
 147         struct pkt *deflate_pkt;
 148         struct pkt *current_ssl_pkt;
 149         struct pkt *pending_deflated_pkt;
 150
 151         z_stream inflate_strm;
 152         uint32_t inflate_adler32;
 153         z_stream deflate_strm;
 154         uint32_t deflate_adler32;
 155
 156         int disable_ipv6;
 157         int reconnect_timeout;
 158         int reconnect_interval;
 159         int dtls_attempt_period;
 160         time_t new_dtls_started;
 161         SSL_CTX *dtls_ctx;
 162         SSL *dtls_ssl;
 163         SSL *new_dtls_ssl;
 164         SSL_SESSION *dtls_session;
 165         struct keepalive_info dtls_times;
 166         unsigned char dtls_session_id[32];
 167         unsigned char dtls_secret[48];
 168
 169         char *dtls_cipher;
 170         char *vpnc_script;
 171         int script_tun;
 172         char *ifname;
 173
 174         int mtu;
 175         const char *banner;
 176         const char *vpn_addr;
 177         const char *vpn_netmask;
 178         const char *vpn_addr6;
 179         const char *vpn_netmask6;
 180         const char *vpn_dns[3];
 181         const char *vpn_nbns[3];
 182         const char *vpn_domain;
 183         const char *vpn_proxy_pac;
 184         struct split_include *split_includes;
 185         struct split_include *split_excludes;
 186
 187         int select_nfds;
 188         fd_set select_rfds;
 189         fd_set select_wfds;
 190         fd_set select_efds;
 191
 192 #ifdef __sun__
 193         int ip_fd;
 194 #endif
 195         int tun_fd;
 196         int ssl_fd;
 197         int dtls_fd;
 198         int new_dtls_fd;
 199
 200         struct pkt *incoming_queue;
 201         struct pkt *outgoing_queue;
 202         int outgoing_qlen;
 203         int max_qlen;
 204
 205         socklen_t peer_addrlen;
 206         struct sockaddr *peer_addr;
 207         struct sockaddr *dtls_addr;
 208
 209         int deflate;
 210         char *useragent;
 211
 212         const char *quit_reason;
 213
 214         void *cbdata;
 215         openconnect_validate_peer_cert_vfn validate_peer_cert;
 216         openconnect_write_new_config_vfn write_new_config;
 217         openconnect_process_auth_form_vfn process_auth_form;
 218         openconnect_progress_vfn progress;
 219 };
 220
 221 /* Packet types */
 222
 223 #define AC_PKT_DATA             0       /* Uncompressed data */
 224 #define AC_PKT_DPD_OUT          3       /* Dead Peer Detection */
 225 #define AC_PKT_DPD_RESP         4       /* DPD response */
 226 #define AC_PKT_DISCONN          5       /* Client disconnection notice */
 227 #define AC_PKT_KEEPALIVE        7       /* Keepalive */
 228 #define AC_PKT_COMPRESSED       8       /* Compressed data */
 229 #define AC_PKT_TERM_SERVER      9       /* Server kick */
 230
 231 /* Ick */
 232 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
 233 #define method_const const
 234 #else
 235 #define method_const
 236 #endif
 237
 238 #define vpn_progress(vpninfo, ...) (vpninfo)->progress ((vpninfo)->cbdata, __VA_ARGS__)
 239
 240 /****************************************************************************/
 241
 242 /* tun.c */
 243 int setup_tun(struct openconnect_info *vpninfo);
 244 int tun_mainloop(struct openconnect_info *vpninfo, int *timeout);
 245 void shutdown_tun(struct openconnect_info *vpninfo);
 246 void script_reconnect (struct openconnect_info *vpninfo);
 247
 248 /* dtls.c */
 249 unsigned char unhex(const char *data);
 250 int setup_dtls(struct openconnect_info *vpninfo);
 251 int dtls_mainloop(struct openconnect_info *vpninfo, int *timeout);
 252 int dtls_try_handshake(struct openconnect_info *vpninfo);
 253 int connect_dtls_socket(struct openconnect_info *vpninfo);
 254
 255 /* cstp.c */
 256 int make_cstp_connection(struct openconnect_info *vpninfo);
 257 int cstp_mainloop(struct openconnect_info *vpninfo, int *timeout);
 258 int cstp_bye(struct openconnect_info *vpninfo, const char *reason);
 259 int cstp_reconnect(struct openconnect_info *vpninfo);
 260
 261 /* ssl.c */
 262 int  __attribute__ ((format (printf, 2, 3)))
 263                 openconnect_SSL_printf(SSL *ssl, const char *fmt, ...);
 264 int openconnect_SSL_gets(SSL *ssl, char *buf, size_t len);
 265 int openconnect_open_https(struct openconnect_info *vpninfo);
 266 void openconnect_close_https(struct openconnect_info *vpninfo);
 267 int get_cert_md5_fingerprint(struct openconnect_info *vpninfo, X509 *cert,
 268                              char *buf);
 269 void report_ssl_errors(struct openconnect_info *vpninfo);
 270
 271 /* mainloop.c */
 272 int vpn_add_pollfd(struct openconnect_info *vpninfo, int fd, short events);
 273 int vpn_mainloop(struct openconnect_info *vpninfo);
 274 int queue_new_packet(struct pkt **q, void *buf, int len);
 275 void queue_packet(struct pkt **q, struct pkt *new);
 276 int keepalive_action(struct keepalive_info *ka, int *timeout);
 277 int ka_stalled_dpd_time(struct keepalive_info *ka, int *timeout);
 278
 279 extern int killed;
 280
 281 /* xml.c */
 282 int config_lookup_host(struct openconnect_info *vpninfo, const char *host);
 283
 284 /* auth.c */
 285 int parse_xml_response(struct openconnect_info *vpninfo, char *response,
 286                        char *request_body, int req_len, const char **method,
 287                        const char **request_body_type);
 288
 289 /* http.c */
 290 char *openconnect_create_useragent(const char *base);
 291 int process_proxy(struct openconnect_info *vpninfo, int ssl_sock);
 292 int internal_parse_url(char *url, char **res_proto, char **res_host,
 293                        int *res_port, char **res_path, int default_port);
 294
 295 /* ssl_ui.c */
 296 int set_openssl_ui(void);
 297
 298 /* securid.c */
 299 int generate_securid_tokencodes(struct openconnect_info *vpninfo);
 300 int add_securid_pin(char *token, char *pin);
 301
 302 /* version.c */
 303 extern char openconnect_version[];
 304
 305 #endif /* __OPENCONNECT_INTERNAL_H__ */