| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | Packet handling
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| 4 | Copyright (C) Volker Lendecke 2007
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| 5 |
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| 6 | This program is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 3 of the License, or
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| 9 | (at your option) any later version.
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| 10 |
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| 11 | This program is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 18 | */
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| 19 |
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| 20 | /*
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| 21 | * A packet context is a wrapper around a bidirectional file descriptor,
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| 22 | * hiding the handling of individual requests.
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| 23 | */
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| 24 |
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| 25 | struct packet_context;
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| 26 |
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| 27 | /*
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| 28 | * Initialize a packet context. The fd is given to the packet context, meaning
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| 29 | * that it is automatically closed when the packet context is freed.
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| 30 | */
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| 31 | struct packet_context *packet_init(TALLOC_CTX *mem_ctx, int fd);
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| 32 |
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| 33 | /*
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| 34 | * Pull data from the fd
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| 35 | */
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| 36 | NTSTATUS packet_fd_read(struct packet_context *ctx);
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| 37 |
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| 38 | /*
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| 39 | * Sync read, wait for the next chunk
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| 40 | */
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| 41 | NTSTATUS packet_fd_read_sync(struct packet_context *ctx, int timeout);
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| 42 |
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| 43 | /*
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| 44 | * Handle an incoming packet:
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| 45 | * Return False if none is available
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| 46 | * Otherwise return True and store the callback result in *status
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| 47 | * Callback must either talloc_move or talloc_free buf
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| 48 | */
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| 49 | bool packet_handler(struct packet_context *ctx,
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| 50 | bool (*full_req)(const uint8_t *buf,
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| 51 | size_t available,
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| 52 | size_t *length,
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| 53 | void *private_data),
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| 54 | NTSTATUS (*callback)(uint8_t *buf, size_t length,
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| 55 | void *private_data),
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| 56 | void *private_data,
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| 57 | NTSTATUS *status);
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| 58 |
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| 59 | /*
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| 60 | * How many bytes of outgoing data do we have pending?
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| 61 | */
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| 62 | size_t packet_outgoing_bytes(struct packet_context *ctx);
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| 63 |
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| 64 | /*
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| 65 | * Push data to the fd
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| 66 | */
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| 67 | NTSTATUS packet_fd_write(struct packet_context *ctx);
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| 68 |
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| 69 | /*
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| 70 | * Sync flush all outgoing bytes
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| 71 | */
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| 72 | NTSTATUS packet_flush(struct packet_context *ctx);
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| 73 |
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| 74 | /*
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| 75 | * Send a list of DATA_BLOBs
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| 76 | *
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| 77 | * Example: packet_send(ctx, 2, data_blob_const(&size, sizeof(size)),
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| 78 | * data_blob_const(buf, size));
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| 79 | */
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| 80 | NTSTATUS packet_send(struct packet_context *ctx, int num_blobs, ...);
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| 81 |
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| 82 | /*
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| 83 | * Get the packet context's file descriptor
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| 84 | */
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| 85 | int packet_get_fd(struct packet_context *ctx);
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