module-webif-lib.h

   1 #ifndef MODULE_WEBIF_LIB_H_
   2 #define MODULE_WEBIF_LIB_H_
   3
   4 #ifdef WITH_SSL
   5 #include <openssl/crypto.h>
   6 #include <openssl/ssl.h>
   7 #include <openssl/err.h>
   8 #endif
   9
  10 #include "cscrypt/md5.h"
  11
  12 /* The server string in the http header */
  13 #define SERVER "webserver/1.0"
  14 /* The protocol that gets output. Currently only 1.0 is possible as 1.1 requires many features we don't have. */
  15 #define PROTOCOL "HTTP/1.0"
  16 /* The RFC1123 time format which is used in http headers. */
  17 #define RFC1123FMT "%a, %d %b %Y %H:%M:%S GMT"
  18 /* The realm for http digest authentication. Gets displayed to browser. */
  19 #define AUTHREALM "Forbidden"
  20 /* How long a nonce is valid in seconds after a first request with this nonce has been received. If the nonce isn't valid anymore, the browser gets a "stale=true" message and must resubmit with the current nonce. */
  21 #define AUTHNONCEVALIDSECS 15
  22 /* When a nonce gets expired after it has been first given to the client. */
  23 #define AUTHNONCEEXPIRATION 120
  24 /* The amount of hash buckets (based on opaque string) for better performance. */
  25 #define AUTHNONCEHASHBUCKETS 4
  26 /* The maximum amount of GET parameters the webserver will parse. */
  27 #define MAXGETPARAMS 150
  28 /* The refresh delay (in seconds) when stopping OSCam via http. */
  29 #define SHUTDOWNREFRESH 30
  30
  31 struct s_connection
  32 {
  33         int32_t socket;
  34         struct s_client *cl;
  35         IN_ADDR_T remote;
  36 #ifdef WITH_SSL
  37         SSL *ssl;
  38 #endif
  39 };
  40
  41 struct uriparams
  42 {
  43         int32_t paramcount;
  44         char *params[MAXGETPARAMS];
  45         char *values[MAXGETPARAMS];
  46 };
  47
  48 struct s_nonce
  49 {
  50         char nonce[(MD5_DIGEST_LENGTH * 2) + 1];
  51         char opaque[(MD5_DIGEST_LENGTH * 2) + 1];
  52         time_t expirationdate;
  53         time_t firstuse;
  54         struct s_nonce *next;
  55 };
  56
  57 // should be filled with informations for stats block
  58 struct pstat
  59 {
  60         uint32_t     info_procs;           // running procs
  61         int64_t      utime_ticks;
  62         int64_t      cutime_ticks;
  63         int64_t      stime_ticks;
  64         int64_t      cstime_ticks;
  65         int64_t      cpu_total_time;
  66         uint64_t     vsize;                // virtual memory size in bytes
  67         uint64_t     rss;                  // Resident Set Size in bytes
  68         uint64_t     mem_total;            // Total Memory in bytes
  69         uint64_t     mem_free;             // Free Memory in bytes
  70         uint64_t     mem_used;             // Used Memory in bytes
  71         uint64_t     mem_buff;             // Buffered Memory in bytes
  72         uint64_t      mem_cached;          // Cached Memory in bytes
  73         uint64_t     mem_freem;            // Buffered Memory in bytes
  74         uint64_t     mem_share;            // Shared Memory in bytes
  75         uint64_t     mem_total_swap;       // Total Swap Memory in bytes
  76         uint64_t     mem_free_swap;        // Free Swap Memory in bytes
  77         uint64_t     mem_used_swap;        // Used Swap Memory in bytes
  78         float        cpu_avg[3];           // CPU load from "load average"
  79         struct timeb time_started;         // needed for calculating time between function call
  80         int64_t      gone_refresh;         // time difference between CPU usage calculations in sec
  81         double       cpu_usage_user;       // user_CPU usage to display in %
  82         double       cpu_usage_sys;        // sys_CPU usage to display in %
  83         uint16_t     check_available;      // default is 0, if value x is not available,
  84         // set corresponding bit to 1 --> module-webif.c / set_status_info()
  85 };
  86
  87 extern time_t parse_modifiedsince(char *value);
  88 extern void calculate_opaque(IN_ADDR_T addr, char *opaque);
  89 extern void init_noncelocks(void);
  90 extern void calculate_nonce(char *nonce, char *result, char *opaque);
  91 extern int32_t check_auth(char *authstring, char *method, char *path, IN_ADDR_T addr, char *expectednonce, char *opaque);
  92 extern int32_t webif_write_raw(char *buf, FILE *f, int32_t len);
  93 extern int32_t webif_write(char *buf, FILE *f);
  94 extern int32_t webif_read(char *buf, int32_t num, FILE *f);
  95 extern void send_headers(FILE *f, int32_t status, char *title, char *extra, char *mime, int32_t cache, int32_t length, char *content, int8_t forcePlain);
  96 extern void send_error(FILE *f, int32_t status, char *title, char *extra, char *text, int8_t forcePlain);
  97 extern void send_error500(FILE *f);
  98 extern void send_header304(FILE *f, char *extraheader);
  99 extern void send_file(FILE *f, char *filename, char *subdir, time_t modifiedheader, uint32_t etagheader, char *extraheader);
 100 extern void urldecode(char *s);
 101 extern void parseParams(struct uriparams *params, char *pch);
 102 extern char *getParam(struct uriparams *params, char *name);
 103 extern int32_t oscam_get_uptime(void);
 104 extern int8_t get_stats_linux(const pid_t pid, struct pstat* result);
 105 extern void calc_cpu_usage_pct(struct pstat* cur_usage, struct pstat* last_usage);
 106
 107 #ifdef WITH_SSL
 108 extern SSL *cur_ssl(void);
 109 extern SSL_CTX *SSL_Webif_Init(void);
 110 #endif
 111
 112 #endif