[457] | 1 | #ifndef LWIP_HDR_APPS_SMTP_H
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| 2 | #define LWIP_HDR_APPS_SMTP_H
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| 3 |
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| 4 | #ifdef __cplusplus
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| 5 | extern "C" {
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| 6 | #endif
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| 7 |
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| 8 | #include "lwip/apps/smtp_opts.h"
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| 9 | #include "lwip/err.h"
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| 10 | #include "lwip/prot/iana.h"
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| 11 |
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| 12 | /** The default TCP port used for SMTP */
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| 13 | #define SMTP_DEFAULT_PORT LWIP_IANA_PORT_SMTP
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| 14 | /** The default TCP port used for SMTPS */
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| 15 | #define SMTPS_DEFAULT_PORT LWIP_IANA_PORT_SMTPS
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| 16 |
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| 17 | /** Email successfully sent */
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| 18 | #define SMTP_RESULT_OK 0
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| 19 | /** Unknown error */
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| 20 | #define SMTP_RESULT_ERR_UNKNOWN 1
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| 21 | /** Connection to server failed */
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| 22 | #define SMTP_RESULT_ERR_CONNECT 2
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| 23 | /** Failed to resolve server hostname */
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| 24 | #define SMTP_RESULT_ERR_HOSTNAME 3
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| 25 | /** Connection unexpectedly closed by remote server */
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| 26 | #define SMTP_RESULT_ERR_CLOSED 4
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| 27 | /** Connection timed out (server didn't respond in time) */
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| 28 | #define SMTP_RESULT_ERR_TIMEOUT 5
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| 29 | /** Server responded with an unknown response code */
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| 30 | #define SMTP_RESULT_ERR_SVR_RESP 6
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| 31 | /** Out of resources locally */
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| 32 | #define SMTP_RESULT_ERR_MEM 7
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| 33 |
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| 34 | /** Prototype of an smtp callback function
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| 35 | *
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| 36 | * @param arg argument specified when initiating the email
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| 37 | * @param smtp_result result of the mail transfer (see defines SMTP_RESULT_*)
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| 38 | * @param srv_err if aborted by the server, this contains the error code received
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| 39 | * @param err an error returned by internal lwip functions, can help to specify
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| 40 | * the source of the error but must not necessarily be != ERR_OK
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| 41 | */
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| 42 | typedef void (*smtp_result_fn)(void *arg, u8_t smtp_result, u16_t srv_err, err_t err);
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| 43 |
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| 44 | /** This structure is used as argument for smtp_send_mail_int(),
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| 45 | * which in turn can be used with tcpip_callback() to send mail
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| 46 | * from interrupt context, e.g. like this:
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| 47 | * struct smtp_send_request *req; (to be filled)
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| 48 | * tcpip_try_callback(smtp_send_mail_int, (void*)req);
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| 49 | *
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| 50 | * For member description, see parameter description of smtp_send_mail().
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| 51 | * When using with tcpip_callback, this structure has to stay allocated
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| 52 | * (e.g. using mem_malloc/mem_free) until its 'callback_fn' is called.
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| 53 | */
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| 54 | struct smtp_send_request {
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| 55 | const char *from;
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| 56 | const char* to;
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| 57 | const char* subject;
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| 58 | const char* body;
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| 59 | smtp_result_fn callback_fn;
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| 60 | void* callback_arg;
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| 61 | /** If this is != 0, data is *not* copied into an extra buffer
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| 62 | * but used from the pointers supplied in this struct.
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| 63 | * This means less memory usage, but data must stay untouched until
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| 64 | * the callback function is called. */
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| 65 | u8_t static_data;
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| 66 | };
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| 67 |
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| 68 |
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| 69 | #if SMTP_BODYDH
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| 70 |
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| 71 | #ifndef SMTP_BODYDH_BUFFER_SIZE
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| 72 | #define SMTP_BODYDH_BUFFER_SIZE 256
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| 73 | #endif /* SMTP_BODYDH_BUFFER_SIZE */
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| 74 |
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| 75 | struct smtp_bodydh {
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| 76 | u16_t state;
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| 77 | u16_t length; /* Length of content in buffer */
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| 78 | char buffer[SMTP_BODYDH_BUFFER_SIZE]; /* buffer for generated content */
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| 79 | #ifdef SMTP_BODYDH_USER_SIZE
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| 80 | u8_t user[SMTP_BODYDH_USER_SIZE];
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| 81 | #endif /* SMTP_BODYDH_USER_SIZE */
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| 82 | };
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| 83 |
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| 84 | enum bdh_retvals_e {
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| 85 | BDH_DONE = 0,
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| 86 | BDH_WORKING
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| 87 | };
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| 88 |
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| 89 | /** Prototype of an smtp body callback function
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| 90 | * It receives a struct smtp_bodydh, and a buffer to write data,
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| 91 | * must return BDH_WORKING to be called again and BDH_DONE when
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| 92 | * it has finished processing. This one tries to fill one TCP buffer with
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| 93 | * data, your function will be repeatedly called until that happens; so if you
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| 94 | * know you'll be taking too long to serve your request, pause once in a while
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| 95 | * by writing length=0 to avoid hogging system resources
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| 96 | *
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| 97 | * @param arg argument specified when initiating the email
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| 98 | * @param smtp_bodydh state handling + buffer structure
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| 99 | */
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| 100 | typedef int (*smtp_bodycback_fn)(void *arg, struct smtp_bodydh *bodydh);
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| 101 |
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| 102 | err_t smtp_send_mail_bodycback(const char *from, const char* to, const char* subject,
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| 103 | smtp_bodycback_fn bodycback_fn, smtp_result_fn callback_fn, void* callback_arg);
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| 104 |
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| 105 | #endif /* SMTP_BODYDH */
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| 106 |
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| 107 |
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| 108 | err_t smtp_set_server_addr(const char* server);
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| 109 | void smtp_set_server_port(u16_t port);
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| 110 | #if LWIP_ALTCP && LWIP_ALTCP_TLS
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| 111 | struct altcp_tls_config;
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| 112 | void smtp_set_tls_config(struct altcp_tls_config *tls_config);
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| 113 | #endif
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| 114 | err_t smtp_set_auth(const char* username, const char* pass);
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| 115 | err_t smtp_send_mail(const char *from, const char* to, const char* subject, const char* body,
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| 116 | smtp_result_fn callback_fn, void* callback_arg);
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| 117 | err_t smtp_send_mail_static(const char *from, const char* to, const char* subject, const char* body,
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| 118 | smtp_result_fn callback_fn, void* callback_arg);
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| 119 | void smtp_send_mail_int(void *arg);
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| 120 | #ifdef LWIP_DEBUG
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| 121 | const char* smtp_result_str(u8_t smtp_result);
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| 122 | #endif
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| 123 |
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| 124 | #ifdef __cplusplus
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| 125 | }
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| 126 | #endif
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| 127 |
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| 128 | #endif /* LWIP_HDR_APPS_SMTP_H */
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