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/****************************************************************************
* scream::scream.h
* routines to connect to screen and or scream daemons.
* BSD Licence applies.
* 2002/04/19 Azundris incept
***************************************************************************/
#define NS_DK 0
#define NS_SSH 1
#define NS_LCL 2
#define NS_SU 3
#define NS_MODE_NEGOTIATE -1
#define NS_MODE_NONE 0
#define NS_MODE_SCREEN 1
#define NS_MODE_SCREAM 2
#define NS_SUCC (-1)
#define NS_FAIL 0
#define NS_OOM 1
#define NS_MALFORMED_URL 2
#define NS_UNKNOWN_USER 3
#define NS_INVALID_SESS 4
#define NS_UNKNOWN_PROTO 5
#define NS_CANT_RESOLVE 6
#define NS_CANT_CONNECT 7
#define NS_CANT_LOGIN 8
#define NS_CANT_ATTACH 9
#define NS_UNKNOWN_LOC 10
#define NS_SCREEN_STATUS 11
#define NS_SCREEN_ST_CLR 12
#define NS_EFUN_NOT_SET 13
#define NS_USER_CXL 14
#define NS_ERR_WEIRDSCREEN 1
#define NS_SCREAM_CURR 1
#define NS_SCREAM_PRVS 2
#define NS_SCREAM_UTMP 4
#define NS_SCREAM_BELL 8
#define NS_SCREAM_ACT 16
#define NS_SCREAM_FILE 32
#define NS_SCREAM_SHARED 64
#define NS_SCREAM_ZOMBIE 128
#define NS_SCREAM_MASK (~(NS_SCREAM_UTMP|NS_SCREAM_PRVS))
#define NS_HOP_DOWN 0
#define NS_HOP_UP 1
/***************************************************************************/
typedef struct __ns_hop {
int localport;
char *fw;
int fwport;
int established;
int delay;
int refcount;
struct __ns_sess *sess; /* first only, others have same host/port */
struct __ns_hop *next;
} _ns_hop;
typedef struct __ns_sess { /* a whole screen-session with many clients */
int where; /* local/remote */
int backend; /* screen/scream */
int nesting; /* 0=topLevel, 1=screen within a screen etc */
time_t timestamp; /* last updated when? see NS_SCREEN_UPD_FREQ */
char *proto; /* protocol. usually "screen" */
char *host; /* host. numeric or symbolic. ("localhost") */
int port; /* port. usually TCP22: SSH */
char *user; /* user. often current local user */
char *pass; /* password. used for su. for remote sessions, a
ssh-key should be on the remote machine. */
char *rsrc; /* add'l parameter to screen/scream. URL-enc */
char *home; /* user's home dir. so we can find .screenrc */
void *userdef; /* the term-app can store a pointer here */
int fd; /* fd for communication */
char escape,literal; /* talking to screen: defaults to ^A, a */
int dsbb; /* default length of scroll-back buffer */
struct __ns_efuns *efuns; /* callbacks into the terminal program. */
struct __ns_hop *hop; /* tunnel, if any */
struct __ns_disp *dsps; /* first display (that with the lowest index) */
struct __ns_disp *curr; /* current display (NULL for none) */
struct __ns_sess *prvs; /* previous session in session list */
struct __ns_sess *next; /* next session in session list */
} _ns_sess;
typedef struct __ns_disp { /* describing the window of a single client */
int index; /* index 0..n */
char *name; /* arbitrary \0-terminated string. humans only. */
int sbb; /* scroll-back buffer. 0 if parent to more screens */
int x; /* rsvd */
int y; /* rsvd */
int w; /* rsvd */
int h; /* rsvd */
int flags; /* current, activity, logging, ... */
struct __ns_sess *sess; /* is child of... (always) */
struct __ns_sess *child; /* if parent of... (rarely) */
struct __ns_efuns *efuns; /* NULL to use its parent's efuns */
struct __ns_disp *prvs; /* left neighbour (<index) of this session */
struct __ns_disp *next; /* right neighbour (>index) of this session */
} _ns_disp;
typedef struct __ns_efuns { /* callbacks into the terminal program */
int refcount; /* use calls below to set this up */
int (*set_scroll_x)(void *,int);
int (*set_scroll_y)(void *,int);
int (*set_scroll_w)(void *,int);
int (*set_scroll_h)(void *,int);
int (*redraw)(void *);
int (*redraw_xywh)(void *,int,int,int,int);
int (*ins_disp)(void *,int,char *);
int (*del_disp)(void *,int);
int (*upd_disp)(void *,int,int,char *);
int (*err_msg)(void *,int,char *);
int (*execute)(void *,char **);
int (*inp_text)(void *,int,char *);
int (*inp_dial)(void *,char *,int,char **,int (*)(void *,char *,size_t,size_t));
int (*inp_tab)(void *,char *[],int,char *,size_t,size_t);
} _ns_efuns;
typedef struct __ns_parse {
int screen;
int real;
int flags;
char *name;
} _ns_parse;
/***************************************************************************/
/* constructors/destructors */
_ns_efuns *ns_new_efuns(void);
_ns_efuns *ns_dst_efuns(_ns_efuns **);
_ns_efuns *ns_get_efuns(_ns_sess *,_ns_disp *);
/* debug */
void ns_desc_hop(_ns_hop *,char *);
void ns_desc_sess(_ns_sess *,char *);
/* convenience */
_ns_disp *disp_fetch_or_make(_ns_sess *,int);
/* transparent attach/detach */
_ns_sess *ns_attach_by_sess(_ns_sess **,int *);
_ns_sess *ns_attach_by_URL(char *,char *,_ns_efuns **,int *,void *);
/* send command to screen */
int ns_screen_command(_ns_sess *, char *);
/* send statement to screen */
int ns_screen_xcommand(_ns_sess *,char , char *);
/* parse and forward a screen-statement */
int ns_parse_screen_cmd(_ns_sess *,char *);
/* parse and forward a screen-hotkey */
int ns_parse_screen_key(_ns_sess *,char);
/* parse screen escape setup */
char ns_parse_esc(char **);
/* init session (read .screenrc, or whatnot) */
int ns_sess_init(_ns_sess *);
/* what the terminal should call the last line -- screen's "hardstatus"
changes. submit session, terminal-width, and a pointer to said line. */
int ns_parse_screen(_ns_sess *,int,int,char *);
/* things the term might ask screen/scream to do ***************************/
int ns_scroll2x(_ns_sess *,int);
int ns_scroll2y(_ns_sess *,int);
int ns_go2_disp(_ns_sess *,int);
int ns_add_disp(_ns_sess *,int,char *);
int ns_rsz_disp(_ns_sess *,int,int,int);
int ns_rem_disp(_ns_sess *,int);
int ns_ren_disp(_ns_sess *,int,char *);
int ns_log_disp(_ns_sess *,int,char *);
int ns_upd_stat(_ns_sess *);
int ns_inp_dial(_ns_sess *,char *,int,char **,int (*)(void *,char *,size_t,size_t));
/* register efuns (callbacks) **********************************************/
void ns_register_ssx(_ns_efuns *,int (*set_scroll_x)(void *,int));
void ns_register_ssy(_ns_efuns *,int (*set_scroll_y)(void *,int));
void ns_register_ssw(_ns_efuns *,int (*set_scroll_w)(void *,int));
void ns_register_ssh(_ns_efuns *,int (*set_scroll_h)(void *,int));
void ns_register_red(_ns_efuns *,int (*redraw)(void *));
void ns_register_rda(_ns_efuns *,int (*redraw_xywh)(void *,int,int,int,int));
void ns_register_ins(_ns_efuns *,int (*ins_disp)(void *,int,char *));
void ns_register_del(_ns_efuns *,int (*del_disp)(void *,int));
void ns_register_upd(_ns_efuns *,int (*upd_disp)(void *,int,int,char *));
void ns_register_err(_ns_efuns *,int (*err_msg)(void *,int,char *));
void ns_register_exe(_ns_efuns *,int (*execute)(void *,char **));
void ns_register_txt(_ns_efuns *,int (*inp_text)(void *,int,char *));
void ns_register_inp(_ns_efuns *,int (*)(void *,char *,int,char **,int (*)(void *,char *,size_t,size_t)));
void ns_register_tab(_ns_efuns *,int (*)(void *,char *[],int,char *,size_t,size_t));
/***************************************************************************/
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