Rev 4496 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 4459 | decky | 1 | /* |
| 2 | * Copyright (c) 2009 Martin Decky |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup ns |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | #include <ipc/ipc.h> |
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| 34 | #include <ipc/services.h> |
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| 35 | #include <libadt/list.h> |
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| 36 | #include <bool.h> |
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| 37 | #include <errno.h> |
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| 38 | #include <assert.h> |
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| 39 | #include <stdio.h> |
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| 40 | #include <malloc.h> |
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| 41 | #include "clonable.h" |
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| 42 | #include "ns.h" |
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| 43 | |||
| 44 | /** Request for connection to a clonable service. */ |
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| 45 | typedef struct { |
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| 46 | link_t link; |
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| 47 | ipcarg_t service; |
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| 48 | ipc_call_t call; |
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| 49 | ipc_callid_t callid; |
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| 50 | } cs_req_t; |
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| 51 | |||
| 52 | /** List of clonable-service connection requests. */ |
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| 53 | static link_t cs_req; |
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| 54 | |||
| 55 | int clonable_init(void) |
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| 56 | { |
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| 57 | list_initialize(&cs_req); |
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| 58 | return EOK; |
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| 59 | } |
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| 60 | |||
| 61 | /** Return true if @a service is clonable. */ |
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| 62 | bool service_clonable(int service) |
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| 63 | { |
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| 64 | return (service == SERVICE_LOAD); |
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| 65 | } |
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| 66 | |||
| 67 | /** Register clonable service. |
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| 68 | * |
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| 69 | * @param service Service to be registered. |
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| 70 | * @param phone Phone to be used for connections to the service. |
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| 71 | * @param call Pointer to call structure. |
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| 72 | * |
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| 73 | */ |
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| 74 | void register_clonable(ipcarg_t service, ipcarg_t phone, ipc_call_t *call, |
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| 75 | ipc_callid_t callid) |
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| 76 | { |
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| 77 | if (list_empty(&cs_req)) { |
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| 78 | /* There was no pending connection request. */ |
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| 79 | printf(NAME ": Unexpected clonable server.\n"); |
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| 80 | ipc_answer_0(callid, EBUSY); |
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| 81 | return; |
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| 82 | } |
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| 83 | |||
| 84 | cs_req_t *csr = list_get_instance(cs_req.next, cs_req_t, link); |
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| 85 | list_remove(&csr->link); |
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| 86 | |||
| 87 | /* Currently we can only handle a single type of clonable service. */ |
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| 88 | assert(csr->service == SERVICE_LOAD); |
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| 89 | |||
| 90 | ipc_answer_0(callid, EOK); |
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| 91 | |||
| 92 | ipc_forward_fast(csr->callid, phone, IPC_GET_ARG2(csr->call), |
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| 93 | IPC_GET_ARG3(csr->call), 0, IPC_FF_NONE); |
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| 94 | |||
| 95 | free(csr); |
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| 96 | ipc_hangup(phone); |
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| 97 | } |
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| 98 | |||
| 99 | /** Connect client to clonable service. |
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| 100 | * |
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| 101 | * @param service Service to be connected to. |
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| 102 | * @param call Pointer to call structure. |
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| 103 | * @param callid Call ID of the request. |
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| 104 | * |
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| 105 | * @return Zero on success or a value from @ref errno.h. |
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| 106 | * |
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| 107 | */ |
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| 108 | void connect_to_clonable(ipcarg_t service, ipc_call_t *call, |
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| 109 | ipc_callid_t callid) |
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| 110 | { |
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| 111 | assert(service == SERVICE_LOAD); |
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| 112 | |||
| 113 | cs_req_t *csr = malloc(sizeof(cs_req_t)); |
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| 114 | if (csr == NULL) { |
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| 115 | ipc_answer_0(callid, ENOMEM); |
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| 116 | return; |
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| 117 | } |
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| 118 | |||
| 119 | /* Spawn a loader. */ |
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| 120 | int rc = loader_spawn("loader"); |
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| 121 | |||
| 122 | if (rc < 0) { |
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| 123 | free(csr); |
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| 124 | ipc_answer_0(callid, rc); |
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| 125 | return; |
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| 126 | } |
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| 127 | |||
| 128 | csr->service = service; |
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| 129 | csr->call = *call; |
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| 130 | csr->callid = callid; |
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| 131 | |||
| 132 | /* |
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| 133 | * We can forward the call only after the server we spawned connects |
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| 134 | * to us. Meanwhile we might need to service more connection requests. |
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| 135 | * Thus we store the call in a queue. |
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| 136 | */ |
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| 137 | list_append(&csr->link, &cs_req); |
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| 138 | } |
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| 139 | |||
| 140 | /** |
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| 141 | * @} |
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| 142 | */ |