1 | /**
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2 | * @file
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3 | * Application layered TCP connection API (to be used from TCPIP thread)\n
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4 | * This interface mimics the tcp callback API to the application while preventing
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5 | * direct linking (much like virtual functions).
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6 | * This way, an application can make use of other application layer protocols
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7 | * on top of TCP without knowing the details (e.g. TLS, proxy connection).
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8 | *
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9 | * This file contains allocation implementation that combine several layers.
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10 | */
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11 |
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12 | /*
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13 | * Copyright (c) 2017 Simon Goldschmidt
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14 | * All rights reserved.
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15 | *
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16 | * Redistribution and use in source and binary forms, with or without modification,
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17 | * are permitted provided that the following conditions are met:
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18 | *
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19 | * 1. Redistributions of source code must retain the above copyright notice,
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20 | * this list of conditions and the following disclaimer.
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21 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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22 | * this list of conditions and the following disclaimer in the documentation
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23 | * and/or other materials provided with the distribution.
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24 | * 3. The name of the author may not be used to endorse or promote products
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25 | * derived from this software without specific prior written permission.
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26 | *
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27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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28 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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29 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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30 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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31 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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32 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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35 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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36 | * OF SUCH DAMAGE.
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37 | *
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38 | * This file is part of the lwIP TCP/IP stack.
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39 | *
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40 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
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41 | *
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42 | */
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43 |
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44 | #include "lwip/opt.h"
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45 |
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46 | #if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
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47 |
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48 | #include "lwip/altcp.h"
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49 | #include "lwip/altcp_tcp.h"
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50 | #include "lwip/altcp_tls.h"
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51 | #include "lwip/priv/altcp_priv.h"
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52 | #include "lwip/mem.h"
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53 |
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54 | #include <string.h>
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55 |
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56 | #if LWIP_ALTCP_TLS
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57 |
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58 | /** This standard allocator function creates an altcp pcb for
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59 | * TLS over TCP */
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60 | struct altcp_pcb *
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61 | altcp_tls_new(struct altcp_tls_config *config, u8_t ip_type)
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62 | {
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63 | struct altcp_pcb *inner_conn, *ret;
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64 | LWIP_UNUSED_ARG(ip_type);
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65 |
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66 | inner_conn = altcp_tcp_new_ip_type(ip_type);
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67 | if (inner_conn == NULL) {
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68 | return NULL;
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69 | }
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70 | ret = altcp_tls_wrap(config, inner_conn);
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71 | if (ret == NULL) {
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72 | altcp_close(inner_conn);
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73 | }
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74 | return ret;
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75 | }
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76 |
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77 | /** This standard allocator function creates an altcp pcb for
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78 | * TLS over TCP */
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79 | struct altcp_pcb *
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80 | altcp_tls_alloc(void *arg, u8_t ip_type)
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81 | {
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82 | return altcp_tls_new((struct altcp_tls_config *)arg, ip_type);
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83 | }
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84 |
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85 | #endif /* LWIP_ALTCP_TLS */
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86 |
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87 | #endif /* LWIP_ALTCP */
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