smtp.h 4.0 KB

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  1. #ifndef HEADER_CURL_SMTP_H
  2. #define HEADER_CURL_SMTP_H
  3. /***************************************************************************
  4. * _ _ ____ _
  5. * Project ___| | | | _ \| |
  6. * / __| | | | |_) | |
  7. * | (__| |_| | _ <| |___
  8. * \___|\___/|_| \_\_____|
  9. *
  10. * Copyright (C) 2009 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
  11. *
  12. * This software is licensed as described in the file COPYING, which
  13. * you should have received as part of this distribution. The terms
  14. * are also available at https://curl.se/docs/copyright.html.
  15. *
  16. * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  17. * copies of the Software, and permit persons to whom the Software is
  18. * furnished to do so, under the terms of the COPYING file.
  19. *
  20. * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21. * KIND, either express or implied.
  22. *
  23. * SPDX-License-Identifier: curl
  24. *
  25. ***************************************************************************/
  26. #include "pingpong.h"
  27. #include "curl_sasl.h"
  28. /****************************************************************************
  29. * SMTP unique setup
  30. ***************************************************************************/
  31. typedef enum {
  32. SMTP_STOP, /* do nothing state, stops the state machine */
  33. SMTP_SERVERGREET, /* waiting for the initial greeting immediately after
  34. a connect */
  35. SMTP_EHLO,
  36. SMTP_HELO,
  37. SMTP_STARTTLS,
  38. SMTP_UPGRADETLS, /* asynchronously upgrade the connection to SSL/TLS
  39. (multi mode only) */
  40. SMTP_AUTH,
  41. SMTP_COMMAND, /* VRFY, EXPN, NOOP, RSET and HELP */
  42. SMTP_MAIL, /* MAIL FROM */
  43. SMTP_RCPT, /* RCPT TO */
  44. SMTP_DATA,
  45. SMTP_POSTDATA,
  46. SMTP_QUIT,
  47. SMTP_LAST /* never used */
  48. } smtpstate;
  49. /* This SMTP struct is used in the Curl_easy. All SMTP data that is
  50. connection-oriented must be in smtp_conn to properly deal with the fact that
  51. perhaps the Curl_easy is changed between the times the connection is
  52. used. */
  53. struct SMTP {
  54. curl_pp_transfer transfer;
  55. char *custom; /* Custom Request */
  56. struct curl_slist *rcpt; /* Recipient list */
  57. bool rcpt_had_ok; /* Whether any of RCPT TO commands (depends on
  58. total number of recipients) succeeded so far */
  59. bool trailing_crlf; /* Specifies if the trailing CRLF is present */
  60. int rcpt_last_error; /* The last error received for RCPT TO command */
  61. size_t eob; /* Number of bytes of the EOB (End Of Body) that
  62. have been received so far */
  63. };
  64. /* smtp_conn is used for struct connection-oriented data in the connectdata
  65. struct */
  66. struct smtp_conn {
  67. struct pingpong pp;
  68. smtpstate state; /* Always use smtp.c:state() to change state! */
  69. bool ssldone; /* Is connect() over SSL done? */
  70. char *domain; /* Client address/name to send in the EHLO */
  71. struct SASL sasl; /* SASL-related storage */
  72. bool tls_supported; /* StartTLS capability supported by server */
  73. bool size_supported; /* If server supports SIZE extension according to
  74. RFC 1870 */
  75. bool utf8_supported; /* If server supports SMTPUTF8 extension according
  76. to RFC 6531 */
  77. bool auth_supported; /* AUTH capability supported by server */
  78. };
  79. extern const struct Curl_handler Curl_handler_smtp;
  80. extern const struct Curl_handler Curl_handler_smtps;
  81. /* this is the 5-bytes End-Of-Body marker for SMTP */
  82. #define SMTP_EOB "\x0d\x0a\x2e\x0d\x0a"
  83. #define SMTP_EOB_LEN 5
  84. #define SMTP_EOB_FIND_LEN 3
  85. /* if found in data, replace it with this string instead */
  86. #define SMTP_EOB_REPL "\x0d\x0a\x2e\x2e"
  87. #define SMTP_EOB_REPL_LEN 4
  88. CURLcode Curl_smtp_escape_eob(struct Curl_easy *data,
  89. const ssize_t nread,
  90. const ssize_t offset);
  91. #endif /* HEADER_CURL_SMTP_H */