bin/cpdup/hclink.h

   1 /*
   2  * HCLINK.H
   3  *
   4  * $DragonFly: src/bin/cpdup/hclink.h,v 1.7 2008/05/24 17:21:36 dillon Exp $
   5  */
   6
   7 #ifndef _HCLINK_H_
   8 #define _HCLINK_H_
   9
  10 struct HCHostDesc {
  11     struct HCHostDesc *next;
  12     int desc;
  13     int type;
  14     void *data;
  15 };
  16
  17 struct HostConf;
  18
  19 typedef struct HCTransaction {
  20     struct HCTransaction *next;
  21     struct HostConf *hc;
  22     u_int16_t   id;             /* assigned transaction id */
  23     int         windex;         /* output buffer index */
  24     enum { HCT_IDLE, HCT_SENT, HCT_REPLIED, HCT_DONE } state;
  25     char        rbuf[65536];    /* input buffer */
  26     char        wbuf[65536];    /* output buffer */
  27 } *hctransaction_t;
  28
  29 struct HostConf {
  30     char        *host;          /* [user@]host */
  31     int         fdin;           /* pipe */
  32     int         fdout;          /* pipe */
  33     int         error;          /* permanent failure code */
  34     pid_t       pid;
  35     int         version;        /* cpdup protocol version */
  36     struct HCHostDesc *hostdescs;
  37     struct HCTransaction trans;
  38 };
  39
  40 struct HCHead {
  41     int32_t magic;              /* magic number / byte ordering */
  42     int32_t bytes;              /* size of packet */
  43     int16_t cmd;                /* command code */
  44     u_int16_t id;               /* transaction id */
  45     int32_t error;              /* error code (response) */
  46 };
  47
  48 #define HCMAGIC         0x48435052      /* compatible byte ordering */
  49 #define HCMAGIC_REV     0x52504348      /* reverse byte ordering */
  50 #define HCC_ALIGN(bytes)        (((bytes) + 7) & ~7)
  51
  52 struct HCLeaf {
  53     int16_t leafid;
  54     int16_t reserved;           /* reserved must be 0 */
  55     int32_t bytes;
  56 };
  57
  58 #define HCF_REPLY       0x8000          /* reply */
  59
  60 #define LCF_TYPEMASK    0x0F00
  61 #define LCF_INT32       0x0100          /* 4 byte integer */
  62 #define LCF_INT64       0x0200          /* 8 byte integer */
  63 #define LCF_STRING      0x0300          /* string, must be 0-terminated */
  64 #define LCF_BINARY      0x0F00          /* binary data */
  65
  66 #define LCF_NESTED      0x8000
  67
  68 struct HCDesc {
  69     int16_t cmd;
  70     int (*func)(hctransaction_t, struct HCHead *);
  71 };
  72
  73 /*
  74  * Item extraction macros
  75  */
  76 #define HCC_STRING(item)        ((const char *)((item) + 1))
  77 #define HCC_INT32(item)         (*(int32_t *)((item) + 1))
  78 #define HCC_INT64(item)         (*(int64_t *)((item) + 1))
  79 #define HCC_BINARYDATA(item)    ((void *)((item) + 1))
  80
  81 /*
  82  * Prototypes
  83  */
  84 int hcc_connect(struct HostConf *hc);
  85 int hcc_slave(int fdin, int fdout, struct HCDesc *descs, int count);
  86
  87 hctransaction_t hcc_start_command(struct HostConf *hc, int16_t cmd);
  88 struct HCHead *hcc_finish_command(hctransaction_t trans);
  89 void hcc_leaf_string(hctransaction_t trans, int16_t leafid, const char *str);
  90 void hcc_leaf_data(hctransaction_t trans, int16_t leafid, const void *ptr, int bytes);
  91 void hcc_leaf_int32(hctransaction_t trans, int16_t leafid, int32_t value);
  92 void hcc_leaf_int64(hctransaction_t trans, int16_t leafid, int64_t value);
  93
  94 int hcc_alloc_descriptor(struct HostConf *hc, void *ptr, int type);
  95 void *hcc_get_descriptor(struct HostConf *hc, int desc, int type);
  96 void hcc_set_descriptor(struct HostConf *hc, int desc, void *ptr, int type);
  97
  98 struct HCLeaf *hcc_firstitem(struct HCHead *head);
  99 struct HCLeaf *hcc_nextitem(struct HCHead *head, struct HCLeaf *item);
 100
 101 void hcc_debug_dump(struct HCHead *head);
 102 void hcc_free_trans(struct HostConf *hc);
 103
 104 #endif
 105