openconnect-internal.h

   1 /*
   2  * OpenConnect (SSL + DTLS) VPN client
   3  *
   4  * Copyright © 2008-2012 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 #define SHA1_SIZE 20
  52
  53 /****************************************************************************/
  54
  55 struct pkt {
  56         int len;
  57         struct pkt *next;
  58         unsigned char hdr[8];
  59         unsigned char data[];
  60 };
  61
  62 struct vpn_option {
  63         char *option;
  64         char *value;
  65         struct vpn_option *next;
  66 };
  67
  68 #define KA_NONE         0
  69 #define KA_DPD          1
  70 #define KA_DPD_DEAD     2
  71 #define KA_KEEPALIVE    3
  72 #define KA_REKEY        4
  73
  74 struct keepalive_info {
  75         int dpd;
  76         int keepalive;
  77         int rekey;
  78         time_t last_rekey;
  79         time_t last_tx;
  80         time_t last_rx;
  81         time_t last_dpd;
  82 };
  83
  84 struct split_include {
  85         char *route;
  86         struct split_include *next;
  87 };
  88
  89 #define RECONNECT_INTERVAL_MIN  10
  90 #define RECONNECT_INTERVAL_MAX  100
  91
  92 #define CERT_TYPE_UNKNOWN       0
  93 #define CERT_TYPE_PEM           1
  94 #define CERT_TYPE_PKCS12        2
  95 #define CERT_TYPE_TPM           3
  96
  97 struct openconnect_info {
  98         char *redirect_url;
  99
 100         char *csd_token;
 101         char *csd_ticket;
 102         char *csd_stuburl;
 103         char *csd_starturl;
 104         char *csd_waiturl;
 105         char *csd_preurl;
 106
 107         char *csd_scriptname;
 108
 109 #ifdef LIBPROXY_HDR
 110         pxProxyFactory *proxy_factory;
 111 #endif
 112         char *proxy_type;
 113         char *proxy;
 114         int proxy_port;
 115
 116         const char *localname;
 117         char *hostname;
 118         int port;
 119         char *urlpath;
 120         int cert_expire_warning;
 121         const char *cert;
 122         const char *sslkey;
 123         X509 *cert_x509;
 124         int cert_type;
 125         char *cert_password;
 126         const char *cafile;
 127         const char *servercert;
 128         const char *xmlconfig;
 129         char xmlsha1[(SHA1_SIZE * 2) + 1];
 130         char *username;
 131         char *password;
 132         char *authgroup;
 133         int nopasswd;
 134         char *dtls_ciphers;
 135         uid_t uid_csd;
 136         char *csd_wrapper;
 137         int uid_csd_given;
 138         int no_http_keepalive;
 139
 140         X509 *peer_cert;
 141
 142         char *cookie; /* Pointer to within cookies list */
 143         struct vpn_option *cookies;
 144         struct vpn_option *cstp_options;
 145         struct vpn_option *dtls_options;
 146
 147         SSL_CTX *https_ctx;
 148         SSL *https_ssl;
 149         struct keepalive_info ssl_times;
 150         int owe_ssl_dpd_response;
 151         struct pkt *deflate_pkt;
 152         struct pkt *current_ssl_pkt;
 153         struct pkt *pending_deflated_pkt;
 154
 155         z_stream inflate_strm;
 156         uint32_t inflate_adler32;
 157         z_stream deflate_strm;
 158         uint32_t deflate_adler32;
 159
 160         int disable_ipv6;
 161         int reconnect_timeout;
 162         int reconnect_interval;
 163         int dtls_attempt_period;
 164         time_t new_dtls_started;
 165         SSL_CTX *dtls_ctx;
 166         SSL *dtls_ssl;
 167         SSL *new_dtls_ssl;
 168         SSL_SESSION *dtls_session;
 169         struct keepalive_info dtls_times;
 170         unsigned char dtls_session_id[32];
 171         unsigned char dtls_secret[48];
 172
 173         char *dtls_cipher;
 174         const char *vpnc_script;
 175         int script_tun;
 176         char *ifname;
 177
 178         int mtu;
 179         const char *banner;
 180         const char *vpn_addr;
 181         const char *vpn_netmask;
 182         const char *vpn_addr6;
 183         const char *vpn_netmask6;
 184         const char *vpn_dns[3];
 185         const char *vpn_nbns[3];
 186         const char *vpn_domain;
 187         const char *vpn_proxy_pac;
 188         struct split_include *split_includes;
 189         struct split_include *split_excludes;
 190
 191         int select_nfds;
 192         fd_set select_rfds;
 193         fd_set select_wfds;
 194         fd_set select_efds;
 195
 196 #ifdef __sun__
 197         int ip_fd;
 198         int ip6_fd;
 199 #endif
 200         int tun_fd;
 201         int ssl_fd;
 202         int dtls_fd;
 203         int new_dtls_fd;
 204         int cancel_fd;
 205
 206         struct pkt *incoming_queue;
 207         struct pkt *outgoing_queue;
 208         int outgoing_qlen;
 209         int max_qlen;
 210
 211         socklen_t peer_addrlen;
 212         struct sockaddr *peer_addr;
 213         struct sockaddr *dtls_addr;
 214
 215         int deflate;
 216         char *useragent;
 217
 218         const char *quit_reason;
 219
 220         void *cbdata;
 221         openconnect_validate_peer_cert_vfn validate_peer_cert;
 222         openconnect_write_new_config_vfn write_new_config;
 223         openconnect_process_auth_form_vfn process_auth_form;
 224         openconnect_progress_vfn progress;
 225 };
 226
 227 /* Packet types */
 228
 229 #define AC_PKT_DATA             0       /* Uncompressed data */
 230 #define AC_PKT_DPD_OUT          3       /* Dead Peer Detection */
 231 #define AC_PKT_DPD_RESP         4       /* DPD response */
 232 #define AC_PKT_DISCONN          5       /* Client disconnection notice */
 233 #define AC_PKT_KEEPALIVE        7       /* Keepalive */
 234 #define AC_PKT_COMPRESSED       8       /* Compressed data */
 235 #define AC_PKT_TERM_SERVER      9       /* Server kick */
 236
 237 /* Ick */
 238 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
 239 #define method_const const
 240 #else
 241 #define method_const
 242 #endif
 243
 244 #define vpn_progress(vpninfo, ...) (vpninfo)->progress ((vpninfo)->cbdata, __VA_ARGS__)
 245
 246 /****************************************************************************/
 247 /* Oh Solaris how we hate thee! */
 248 #ifdef __sun__
 249 #define time(x) openconnect__time(x)
 250 time_t openconnect__time(time_t *t);
 251 #endif
 252 #ifndef HAVE_ASPRINTF
 253 #define asprintf openconnect__asprintf
 254 int openconnect__asprintf(char **strp, const char *fmt, ...);
 255 #endif
 256 #ifndef HAVE_GETLINE
 257 #define getline openconnect__getline
 258 ssize_t openconnect__getline(char **lineptr, size_t *n, FILE *stream);
 259 #endif
 260
 261 /****************************************************************************/
 262
 263 /* tun.c */
 264 int setup_tun(struct openconnect_info *vpninfo);
 265 int tun_mainloop(struct openconnect_info *vpninfo, int *timeout);
 266 void shutdown_tun(struct openconnect_info *vpninfo);
 267 int script_config_tun (struct openconnect_info *vpninfo, const char *reason);
 268
 269 /* dtls.c */
 270 unsigned char unhex(const char *data);
 271 int setup_dtls(struct openconnect_info *vpninfo);
 272 int dtls_mainloop(struct openconnect_info *vpninfo, int *timeout);
 273 int dtls_try_handshake(struct openconnect_info *vpninfo);
 274 int connect_dtls_socket(struct openconnect_info *vpninfo);
 275
 276 /* cstp.c */
 277 int make_cstp_connection(struct openconnect_info *vpninfo);
 278 int cstp_mainloop(struct openconnect_info *vpninfo, int *timeout);
 279 int cstp_bye(struct openconnect_info *vpninfo, const char *reason);
 280 int cstp_reconnect(struct openconnect_info *vpninfo);
 281
 282 /* ssl.c */
 283 int  __attribute__ ((format (printf, 2, 3)))
 284     openconnect_SSL_printf(struct openconnect_info *vpninfo, const char *fmt, ...);
 285 int openconnect_SSL_gets(struct openconnect_info *vpninfo, char *buf, size_t len);
 286 int openconnect_SSL_write(struct openconnect_info *vpninfo, char *buf, size_t len);
 287 int openconnect_SSL_read(struct openconnect_info *vpninfo, char *buf, size_t len);
 288 int openconnect_open_https(struct openconnect_info *vpninfo);
 289 void openconnect_close_https(struct openconnect_info *vpninfo);
 290 int get_cert_md5_fingerprint(struct openconnect_info *vpninfo, X509 *cert,
 291                              char *buf);
 292 void openconnect_report_ssl_errors(struct openconnect_info *vpninfo);
 293
 294 /* ${SSL_LIBRARY}.c */
 295 int openconnect_sha1(unsigned char *result, void *data, int len);
 296
 297 /* mainloop.c */
 298 int vpn_add_pollfd(struct openconnect_info *vpninfo, int fd, short events);
 299 int vpn_mainloop(struct openconnect_info *vpninfo);
 300 int queue_new_packet(struct pkt **q, void *buf, int len);
 301 void queue_packet(struct pkt **q, struct pkt *new);
 302 int keepalive_action(struct keepalive_info *ka, int *timeout);
 303 int ka_stalled_dpd_time(struct keepalive_info *ka, int *timeout);
 304
 305 extern int killed;
 306
 307 /* xml.c */
 308 int config_lookup_host(struct openconnect_info *vpninfo, const char *host);
 309
 310 /* auth.c */
 311 int parse_xml_response(struct openconnect_info *vpninfo, char *response,
 312                        char *request_body, int req_len, const char **method,
 313                        const char **request_body_type);
 314
 315 /* http.c */
 316 char *openconnect_create_useragent(const char *base);
 317 int process_proxy(struct openconnect_info *vpninfo, int ssl_sock);
 318 int internal_parse_url(char *url, char **res_proto, char **res_host,
 319                        int *res_port, char **res_path, int default_port);
 320
 321 /* ssl_ui.c */
 322 int set_openssl_ui(void);
 323
 324 /* securid.c */
 325 int generate_securid_tokencodes(struct openconnect_info *vpninfo);
 326 int add_securid_pin(char *token, char *pin);
 327
 328 /* version.c */
 329 extern const char *openconnect_version_str;
 330
 331 #endif /* __OPENCONNECT_INTERNAL_H__ */