- For security reasons move some libc code to PFS. - Fix a few bugs in PFS. Contributed by Thomas Cort.
241 lines
5.6 KiB
C
241 lines
5.6 KiB
C
#ifndef __PFS_UDS_H__
|
|
#define __PFS_UDS_H__
|
|
|
|
/*
|
|
* Unix Domain Sockets Implementation (PF_UNIX, PF_LOCAL)
|
|
*
|
|
* Also See...
|
|
*
|
|
* dev_uds.c, table.c, uds.c
|
|
*/
|
|
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ucred.h>
|
|
#include <sys/un.h>
|
|
|
|
#include <minix/endpoint.h>
|
|
|
|
/* max connection backlog for incoming connections */
|
|
#define UDS_SOMAXCONN 64
|
|
|
|
typedef void* filp_id_t;
|
|
|
|
/* ancillary data to be sent */
|
|
struct ancillary {
|
|
filp_id_t filps[OPEN_MAX];
|
|
int fds[OPEN_MAX];
|
|
int nfiledes;
|
|
struct ucred cred;
|
|
};
|
|
|
|
/*
|
|
* Internal State Information for a socket descriptor.
|
|
*/
|
|
struct uds_fd {
|
|
|
|
/* Flags */
|
|
|
|
enum UDS_STATE {
|
|
/* This file descriptor is UDS_FREE and can be allocated. */
|
|
UDS_FREE = 0,
|
|
|
|
/* OR it is UDS_INUSE and can't be allocated. */
|
|
UDS_INUSE = 1
|
|
|
|
/* state is set to UDS_INUSE in uds_open(). state is Set to
|
|
* UDS_FREE in uds_init() and uds_close(). state should be
|
|
* checked prior to all operations.
|
|
*/
|
|
} state;
|
|
|
|
/* Owner Info */
|
|
|
|
/* Socket Owner */
|
|
endpoint_t owner;
|
|
|
|
/* endpoint for suspend/resume */
|
|
endpoint_t endpoint;
|
|
|
|
/* Pipe Housekeeping */
|
|
|
|
/* inode number on PFS -- each descriptor is backed by 1
|
|
* PIPE which is allocated in uds_open() and freed in
|
|
* uds_close(). Data is sent/written to a peer's PIPE.
|
|
* Data is recv/read from this PIPE.
|
|
*/
|
|
ino_t inode_nr;
|
|
|
|
|
|
/* position in the PIPE where the data starts */
|
|
off_t pos;
|
|
|
|
/* size of data in the PIPE */
|
|
size_t size;
|
|
|
|
/* control read/write, set by uds_open() and shutdown(2).
|
|
* Can be set to S_IRUSR|S_IWUSR, S_IRUSR, S_IWUSR, or 0
|
|
* for read and write, read only, write only, or neither.
|
|
* default is S_IRUSR|S_IWUSR.
|
|
*/
|
|
mode_t mode;
|
|
|
|
/* Socket Info */
|
|
|
|
|
|
/* socket type - SOCK_STREAM, SOCK_DGRAM, or SOCK_SEQPACKET
|
|
* Set by uds_ioctl(NWIOSUDSTYPE). It defaults to -1 in
|
|
* uds_open(). Any action on a socket with type -1 besides
|
|
* uds_ioctl(NWIOSUDSTYPE) and uds_close() will result in
|
|
* an error.
|
|
*/
|
|
int type;
|
|
|
|
/* queue of pending connections for server sockets.
|
|
* connect(2) inserts and accept(2) removes from the queue
|
|
*/
|
|
int backlog[UDS_SOMAXCONN];
|
|
|
|
/* requested connection backlog size. Set by listen(2)
|
|
* Bounds (0 <= backlog_size <= UDS_SOMAXCONN)
|
|
* Defaults to UDS_SOMAXCONN which is defined above.
|
|
*/
|
|
unsigned char backlog_size;
|
|
|
|
/* index of peer in uds_fd_table for connected sockets.
|
|
* -1 is used to mean no peer. Assumptions: peer != -1 means
|
|
* connected.
|
|
*/
|
|
int peer;
|
|
|
|
/* index of child (client sd returned by accept(2))
|
|
* -1 is used to mean no child.
|
|
*/
|
|
int child;
|
|
|
|
/* address -- the address the socket is bound to.
|
|
* Assumptions: addr.sun_family == AF_UNIX means its bound.
|
|
*/
|
|
struct sockaddr_un addr;
|
|
|
|
/* target -- where DGRAMs are sent to on the next uds_write(). */
|
|
struct sockaddr_un target;
|
|
|
|
/* source -- address where DGRAMs are from. used to fill in the
|
|
* from address in recvfrom(2) and recvmsg(2).
|
|
*/
|
|
struct sockaddr_un source;
|
|
|
|
/* Flag (1 or 0) - listening for incoming connections.
|
|
* Default to 0. Set to 1 by do_listen()
|
|
*/
|
|
int listening;
|
|
|
|
/* stores file pointers and credentials being sent between
|
|
* processes with sendmsg(2) and recvmsg(2).
|
|
*/
|
|
struct ancillary ancillary_data;
|
|
|
|
/* Holds an errno. This is set when a connected socket is
|
|
* closed and we need to pass ECONNRESET on to a suspended
|
|
* peer.
|
|
*/
|
|
int err;
|
|
|
|
/* Suspend/Revive Housekeeping */
|
|
|
|
|
|
/* SUSPEND State Flags */
|
|
enum UDS_SUSPENDED {
|
|
|
|
/* Socket isn't blocked. */
|
|
UDS_NOT_SUSPENDED = 0,
|
|
|
|
/* Socket is blocked on read(2) waiting for data to read. */
|
|
UDS_SUSPENDED_READ = 1,
|
|
|
|
/* Socket is blocked on write(2) for space to write data. */
|
|
UDS_SUSPENDED_WRITE = 2,
|
|
|
|
/* Socket is blocked on connect(2) waiting for the server. */
|
|
UDS_SUSPENDED_CONNECT = 4,
|
|
|
|
/* Socket is blocked on accept(2) waiting for clients. */
|
|
UDS_SUSPENDED_ACCEPT = 8
|
|
} suspended;
|
|
|
|
/* Flag (1 or 0) - thing socket was waiting for is ready.
|
|
* If 1, then uds_status() will attempt the operation that
|
|
* the socket was blocked on.
|
|
*/
|
|
int ready_to_revive;
|
|
|
|
/* i/o grant, saved for later use by suspended procs */
|
|
cp_grant_id_t io_gr;
|
|
|
|
/* is of i/o grant, saved for later use by suspended procs */
|
|
size_t io_gr_size;
|
|
|
|
/* Save the call number so that uds_cancel() can unwind the
|
|
* call properly.
|
|
*/
|
|
int call_nr;
|
|
|
|
/* Save the IOCTL so uds_cancel() knows what got cancelled. */
|
|
int ioctl;
|
|
|
|
/* Flag (1 or 0) - the system call completed.
|
|
* A doc I read said DEV_CANCEL might be called even though
|
|
* the operation is finished. We use this variable to
|
|
* determine if we should rollback the changes or not.
|
|
*/
|
|
int syscall_done;
|
|
|
|
/* select() */
|
|
|
|
/* Flag (1 or 0) - the process blocked on select(2). When
|
|
* selecting is 1 and I/O happens on this socket, then
|
|
* select_proc should be notified.
|
|
*/
|
|
int selecting;
|
|
|
|
/* when a select is in progress, we notify() this endpoint
|
|
* of new data.
|
|
*/
|
|
endpoint_t select_proc;
|
|
|
|
/* Options (SEL_RD, SEL_WR, SEL_ERR) that are requested. */
|
|
int sel_ops_in;
|
|
|
|
/* Options that are available for this socket. */
|
|
int sel_ops_out;
|
|
|
|
/* Flag (1 or 0) to be set to one before calling notify().
|
|
* uds_status() will use the flag to locate this descriptor.
|
|
*/
|
|
int status_updated;
|
|
};
|
|
|
|
typedef struct uds_fd uds_fd_t;
|
|
|
|
/* File Descriptor Table -- Defined in uds.c */
|
|
EXTERN uds_fd_t uds_fd_table[NR_FDS];
|
|
|
|
/*
|
|
* Take message m and get the index in uds_fd_table.
|
|
*/
|
|
#define uds_minor(m) (minor((dev_t) m->DEVICE) & BYTE)
|
|
|
|
/*
|
|
* Fill in a reply message.
|
|
*/
|
|
#define uds_set_reply(msg,type,endpoint,io_gr,status) \
|
|
do { \
|
|
msg->m_type = type; \
|
|
msg->REP_ENDPT = endpoint; \
|
|
msg->REP_IO_GRANT = io_gr; \
|
|
msg->REP_STATUS = status; \
|
|
} while (0)
|
|
|
|
|
|
#endif
|