proc SPF_i_done(spf_response: SPF_response; result: SPF_result_t;
                reason: SPF_reason_t; err: SPF_errcode_t): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_free(sr: SPF_request) {.importc, header: "spf.h", ...raises: [],
    tags: [], forbids: [].}

proc SPF_request_get_client_dom(sr: SPF_request): cstring {.importc,
    header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_get_exp(spf_server: SPF_server; spf_request: SPF_request;
                         spf_response: SPF_response; spf_record: SPF_record;
                         bufp: ptr cstring; buflenp: ptr csize_t): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_get_rec_dom(sr: SPF_request): cstring {.importc,
    header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_is_loopback(sr: SPF_request): cint {.importc, header: "spf.h",
    ...raises: [], tags: [], forbids: [].}

proc SPF_request_new(spf_server: SPF_server): SPF_request {.importc,
    header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_query_fallback(spf_request: SPF_request;
                                spf_responsep: ptr SPF_response; record: cstring): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_query_mailfrom(spf_request: SPF_request;
                                spf_responsep: ptr SPF_response): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_query_rcptto(spf_request: SPF_request;
                              spf_responsep: ptr SPF_response; rcpt_to: cstring): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_set_env_from(sr: SPF_request; fromAddress: cstring): cint {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_set_helo_dom(sr: SPF_request; dom: cstring): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_set_ipv4(sr: SPF_request; address: in_addr): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_set_ipv4_str(sr: SPF_request; astr: cstring): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_set_ipv6(sr: SPF_request; address: in6_addr): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}

proc SPF_request_set_ipv6_str(sr: SPF_request; astr: cstring): SPF_errcode_t {.
    importc, header: "spf.h", ...raises: [], tags: [], forbids: [].}