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php-src/win32/sendmail.c

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/*
* PHP Sendmail for Windows.
*
* This file is rewriten specificly for PHPFI. Some functionality
* has been removed (MIME and file attachments). This code was
* modified from code based on code writen by Jarle Aase.
*
* This class is based on the original code by Jarle Aase, see bellow:
* wSendmail.cpp It has been striped of some functionality to match
* the requirements of phpfi.
*
* Very simple SMTP Send-mail program for sending command-line level
* emails and CGI-BIN form response for the Windows platform.
*
* The complete wSendmail package with source code can be located
* from http://www.jgaa.com
*
*/
/* $Id$ */
#include "php.h" /*php specific */
#include <stdio.h>
#include <stdlib.h>
#ifndef NETWARE
#include <winsock2.h>
#include "time.h"
#else /* NETWARE */
#include <netware/sendmail_nw.h>
#endif /* NETWARE */
#include <string.h>
#include <math.h>
#ifndef NETWARE
#include <malloc.h>
#include <memory.h>
#include <winbase.h>
#endif /* NETWARE */
#include "sendmail.h"
#include "php_ini.h"
#if HAVE_PCRE || HAVE_BUNDLED_PCRE
#include "ext/pcre/php_pcre.h"
#endif
#include "ext/standard/php_string.h"
#include "ext/date/php_date.h"
/*enum
{
DO_CONNECT = WM_USER +1
};
*/
/* '*error_message' has to be passed around from php_mail() */
#define SMTP_ERROR_RESPONSE_SPEC "SMTP server response: %s"
/* Convinient way to handle error messages from the SMTP server.
response is ecalloc()d in Ack() itself and efree()d here
because the content is in *error_message now */
#define SMTP_ERROR_RESPONSE(response) { \
if (response && error_message) { \
if (NULL != (*error_message = ecalloc(1, sizeof(SMTP_ERROR_RESPONSE_SPEC) + strlen(response)))) { \
snprintf(*error_message, sizeof(SMTP_ERROR_RESPONSE_SPEC) + strlen(response), SMTP_ERROR_RESPONSE_SPEC, response); \
} \
efree(response); \
} \
}
#define SMTP_SKIP_SPACE(str) { while (isspace(*str)) { str++; } }
#ifndef THREAD_SAFE
char Buffer[MAIL_BUFFER_SIZE];
/* socket related data */
SOCKET sc;
#ifndef NETWARE
WSADATA Data;
struct hostent *adr;
int WinsockStarted;
/* values set by the constructor */
char *AppName;
#endif /* NETWARE */
SOCKADDR_IN sock_in;
char MailHost[HOST_NAME_LEN];
char LocalHost[HOST_NAME_LEN];
#endif
char seps[] = " ,\t\n";
#ifndef NETWARE
char *php_mailer = "PHP 5 WIN32";
#else
char *php_mailer = "PHP 5 NetWare";
#endif /* NETWARE */
/* Error messages */
static char *ErrorMessages[] =
{
{"Success"}, /* 0 */
{"Bad arguments from form"}, /* 1 */
{"Unable to open temporary mailfile for read"},
{"Failed to Start Sockets"},
{"Failed to Resolve Host"},
{"Failed to obtain socket handle"}, /* 5 */
{"Failed to connect to mailserver, verify your \"SMTP\" setting in php.ini"},
{"Failed to Send"},
{"Failed to Receive"},
{"Server Error"},
{"Failed to resolve the host IP name"}, /* 10 */
{"Out of memory"},
{"Unknown error"},
{"Bad Message Contents"},
{"Bad Message Subject"},
{"Bad Message destination"}, /* 15 */
{"Bad Message Return Path"},
{"Bad Mail Host"},
{"Bad Message File"},
{"\"sendmail_from\" not set in php.ini or custom \"From:\" header missing"},
{"Mailserver rejected our \"sendmail_from\" setting"}, /* 20 */
{"Error while trimming mail header with PCRE, please file a bug report at http://bugs.php.net/"} /* 21 */
};
/* This pattern converts all single occurences of \n (Unix)
* withour a leading \r to \r\n and all occurences of \r (Mac)
* without a trailing \n to \r\n
* Thx to Nibbler from ircnet/#linuxger
*/
#define PHP_WIN32_MAIL_UNIFY_PATTERN "/(\r\n?)|\n/"
#define PHP_WIN32_MAIL_UNIFY_REPLACE "\r\n"
/* This pattern removes \r\n from the start of the string,
* \r\n from the end of the string and also makes sure every line
* is only wrapped with a single \r\n (thus reduces multiple
* occurences of \r\n between lines to a single \r\n) */
#define PHP_WIN32_MAIL_RMVDBL_PATTERN "/^\r\n|(\r\n)+$/m"
#define PHP_WIN32_MAIL_RMVDBL_REPLACE ""
/* This pattern escapes \n. inside the message body. It prevents
* premature end of message if \n.\n or \r\n.\r\n is encountered
* and ensures that \n. sequences are properly displayed in the
* message body. */
#define PHP_WIN32_MAIL_DOT_PATTERN "\n."
#define PHP_WIN32_MAIL_DOT_REPLACE "\n.."
/* This function is meant to unify the headers passed to to mail()
* This means, use PCRE to transform single occurences of \n or \r in \r\n
* As a second step we also eleminate all \r\n occurences which are:
* 1) At the start of the header
* 2) At the end of the header
* 3) Two or more occurences in the header are removed so only one is left
*
* Returns NULL on error, or the new char* buffer on success.
* You have to take care and efree() the buffer on your own.
*/
static char *php_win32_mail_trim_header(char *header TSRMLS_DC)
{
#if HAVE_PCRE || HAVE_BUNDLED_PCRE
char *result, *result2;
int result_len;
zval *replace;
if (!header) {
return NULL;
}
MAKE_STD_ZVAL(replace);
ZVAL_STRING(replace, PHP_WIN32_MAIL_UNIFY_REPLACE, 0);
result = php_pcre_replace(PHP_WIN32_MAIL_UNIFY_PATTERN, sizeof(PHP_WIN32_MAIL_UNIFY_PATTERN)-1,
header, strlen(header),
replace,
0,
&result_len,
-1,
NULL TSRMLS_CC);
if (NULL == result) {
FREE_ZVAL(replace);
return NULL;
}
ZVAL_STRING(replace, PHP_WIN32_MAIL_RMVDBL_REPLACE, 0);
result2 = php_pcre_replace(PHP_WIN32_MAIL_RMVDBL_PATTERN, sizeof(PHP_WIN32_MAIL_RMVDBL_PATTERN)-1,
result, result_len,
replace,
0,
&result_len,
-1,
NULL TSRMLS_CC);
efree(result);
FREE_ZVAL(replace);
return result2;
#else
/* In case we don't have PCRE support (for whatever reason...) simply do nothing and return the unmodified header */
return estrdup(header);
#endif
}
/*********************************************************************
// Name: TSendMail
// Input: 1) host: Name of the mail host where the SMTP server resides
// max accepted length of name = 256
// 2) appname: Name of the application to use in the X-mailer
// field of the message. if NULL is given the application
// name is used as given by the GetCommandLine() function
// max accespted length of name = 100
// Output: 1) error: Returns the error code if something went wrong or
// SUCCESS otherwise.
//
// See SendText() for additional args!
//********************************************************************/
PHPAPI int TSendMail(char *host, int *error, char **error_message,
char *headers, char *Subject, char *mailTo, char *data,
char *mailCc, char *mailBcc, char *mailRPath TSRMLS_DC)
{
int ret;
char *RPath = NULL;
char *headers_lc = NULL; /* headers_lc is only created if we've a header at all */
char *pos1 = NULL, *pos2 = NULL;
#ifndef NETWARE
WinsockStarted = FALSE;
#endif
if (host == NULL) {
*error = BAD_MAIL_HOST;
return FAILURE;
} else if (strlen(host) >= HOST_NAME_LEN) {
*error = BAD_MAIL_HOST;
return FAILURE;
} else {
strcpy(MailHost, host);
}
if (headers) {
char *pos = NULL;
size_t i;
/* Use PCRE to trim the header into the right format */
if (NULL == (headers = php_win32_mail_trim_header(headers TSRMLS_CC))) {
*error = W32_SM_PCRE_ERROR;
return FAILURE;
}
/* Create a lowercased header for all the searches so we're finally case
* insensitive when searching for a pattern. */
if (NULL == (headers_lc = estrdup(headers))) {
efree(headers);
*error = OUT_OF_MEMORY;
return FAILURE;
}
for (i = 0; i < strlen(headers_lc); i++) {
headers_lc[i] = tolower(headers_lc[i]);
}
}
/* Fall back to sendmail_from php.ini setting */
if (mailRPath && *mailRPath) {
RPath = estrdup(mailRPath);
} else if (INI_STR("sendmail_from")) {
RPath = estrdup(INI_STR("sendmail_from"));
} else if ( headers_lc &&
(pos1 = strstr(headers_lc, "from:")) &&
((pos1 == headers_lc) || (*(pos1-1) == '\n'))
) {
/* Real offset is memaddress from the original headers + difference of
* string found in the lowercase headrs + 5 characters to jump over
* the from: */
pos1 = headers + (pos1 - headers_lc) + 5;
if (NULL == (pos2 = strstr(pos1, "\r\n"))) {
RPath = estrndup(pos1, strlen(pos1));
} else {
RPath = estrndup(pos1, pos2 - pos1);
}
} else {
if (headers) {
efree(headers);
efree(headers_lc);
}
*error = W32_SM_SENDMAIL_FROM_NOT_SET;
return FAILURE;
}
/* attempt to connect with mail host */
*error = MailConnect();
if (*error != 0) {
if (RPath) {
efree(RPath);
}
if (headers) {
efree(headers);
efree(headers_lc);
}
/* 128 is safe here, the specifier in snprintf isn't longer than that */
if (NULL == (*error_message = ecalloc(1, HOST_NAME_LEN + 128))) {
return FAILURE;
}
snprintf(*error_message, HOST_NAME_LEN + 128,
"Failed to connect to mailserver at \"%s\" port %d, verify your \"SMTP\" "
"and \"smtp_port\" setting in php.ini or use ini_set()",
MailHost, !INI_INT("smtp_port") ? 25 : INI_INT("smtp_port"));
return FAILURE;
} else {
ret = SendText(RPath, Subject, mailTo, mailCc, mailBcc, data, headers, headers_lc, error_message TSRMLS_CC);
TSMClose();
if (RPath) {
efree(RPath);
}
if (headers) {
efree(headers);
efree(headers_lc);
}
if (ret != SUCCESS) {
*error = ret;
return FAILURE;
}
return SUCCESS;
}
}
//********************************************************************
// Name: TSendMail::~TSendMail
// Input:
// Output:
// Description: DESTRUCTOR
// Author/Date: jcar 20/9/96
// History:
//********************************************************************/
PHPAPI void TSMClose()
{
Post("QUIT\r\n");
Ack(NULL);
/* to guarantee that the cleanup is not made twice and
compomise the rest of the application if sockets are used
elesewhere
*/
shutdown(sc, 0);
closesocket(sc);
}
/*********************************************************************
// Name: char *GetSMErrorText
// Input: Error index returned by the menber functions
// Output: pointer to a string containing the error description
// Description:
// Author/Date: jcar 20/9/96
// History:
//*******************************************************************/
PHPAPI char *GetSMErrorText(int index)
{
if (MIN_ERROR_INDEX <= index && index < MAX_ERROR_INDEX) {
return (ErrorMessages[index]);
} else {
return (ErrorMessages[UNKNOWN_ERROR]);
}
}
/*********************************************************************
// Name: SendText
// Input: 1) RPath: return path of the message
// Is used to fill the "Return-Path" and the
// "X-Sender" fields of the message.
// 2) Subject: Subject field of the message. If NULL is given
// the subject is set to "No Subject"
// 3) mailTo: Destination address
// 4) data: Null terminated string containing the data to be send.
// 5,6) headers of the message. Note that the second
// parameter, headers_lc, is actually a lowercased version of
// headers. The should match exactly (in terms of length),
// only differ in case
// Output: Error code or SUCCESS
// Description:
// Author/Date: jcar 20/9/96
// History:
//*******************************************************************/
static int SendText(char *RPath, char *Subject, char *mailTo, char *mailCc, char *mailBcc, char *data,
char *headers, char *headers_lc, char **error_message TSRMLS_DC)
{
int res;
char *p;
char *tempMailTo, *token, *pos1, *pos2;
char *server_response = NULL;
char *stripped_header = NULL;
char *data_cln;
int data_cln_len;
/* check for NULL parameters */
if (data == NULL)
return (BAD_MSG_CONTENTS);
if (mailTo == NULL)
return (BAD_MSG_DESTINATION);
if (RPath == NULL)
return (BAD_MSG_RPATH);
/* simple checks for the mailto address */
/* have ampersand ? */
/* mfischer, 20020514: I commented this out because it really
seems bogus. Only a username for example may still be a
valid address at the destination system.
if (strchr(mailTo, '@') == NULL)
return (BAD_MSG_DESTINATION);
*/
snprintf(Buffer, sizeof(Buffer), "HELO %s\r\n", LocalHost);
/* in the beggining of the dialog */
/* attempt reconnect if the first Post fail */
if ((res = Post(Buffer)) != SUCCESS) {
MailConnect();
if ((res = Post(Buffer)) != SUCCESS) {
return (res);
}
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
return (res);
}
SMTP_SKIP_SPACE(RPath);
snprintf(Buffer, MAIL_BUFFER_SIZE, "MAIL FROM:<%s>\r\n", RPath);
if ((res = Post(Buffer)) != SUCCESS) {
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
return W32_SM_SENDMAIL_FROM_MALFORMED;
}
tempMailTo = estrdup(mailTo);
/* Send mail to all rcpt's */
token = strtok(tempMailTo, ",");
while (token != NULL)
{
SMTP_SKIP_SPACE(token);
snprintf(Buffer, MAIL_BUFFER_SIZE, "RCPT TO:<%s>\r\n", token);
if ((res = Post(Buffer)) != SUCCESS) {
efree(tempMailTo);
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
efree(tempMailTo);
return (res);
}
token = strtok(NULL, ",");
}
efree(tempMailTo);
if (mailCc && *mailCc) {
tempMailTo = estrdup(mailCc);
/* Send mail to all rcpt's */
token = strtok(tempMailTo, ",");
while (token != NULL)
{
SMTP_SKIP_SPACE(token);
snprintf(Buffer, MAIL_BUFFER_SIZE, "RCPT TO:<%s>\r\n", token);
if ((res = Post(Buffer)) != SUCCESS) {
efree(tempMailTo);
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
efree(tempMailTo);
return (res);
}
token = strtok(NULL, ",");
}
efree(tempMailTo);
}
/* Send mail to all Cc rcpt's */
else if (headers && (pos1 = strstr(headers_lc, "cc:")) && ((pos1 == headers_lc) || (*(pos1-1) == '\n'))) {
/* Real offset is memaddress from the original headers + difference of
* string found in the lowercase headrs + 3 characters to jump over
* the cc: */
pos1 = headers + (pos1 - headers_lc) + 3;
if (NULL == (pos2 = strstr(pos1, "\r\n"))) {
tempMailTo = estrndup(pos1, strlen(pos1));
} else {
tempMailTo = estrndup(pos1, pos2 - pos1);
}
token = strtok(tempMailTo, ",");
while (token != NULL)
{
SMTP_SKIP_SPACE(token);
snprintf(Buffer, MAIL_BUFFER_SIZE, "RCPT TO:<%s>\r\n", token);
if ((res = Post(Buffer)) != SUCCESS) {
efree(tempMailTo);
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
efree(tempMailTo);
return (res);
}
token = strtok(NULL, ",");
}
efree(tempMailTo);
}
/* Send mail to all Bcc rcpt's
This is basically a rip of the Cc code above.
Just don't forget to remove the Bcc: from the header afterwards. */
if (mailBcc && *mailBcc) {
tempMailTo = estrdup(mailBcc);
/* Send mail to all rcpt's */
token = strtok(tempMailTo, ",");
while (token != NULL)
{
SMTP_SKIP_SPACE(token);
snprintf(Buffer, MAIL_BUFFER_SIZE, "RCPT TO:<%s>\r\n", token);
if ((res = Post(Buffer)) != SUCCESS) {
efree(tempMailTo);
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
efree(tempMailTo);
return (res);
}
token = strtok(NULL, ",");
}
efree(tempMailTo);
}
else if (headers) {
if (pos1 = strstr(headers_lc, "bcc:")) {
/* Real offset is memaddress from the original headers + difference of
* string found in the lowercase headrs + 4 characters to jump over
* the bcc: */
pos1 = headers + (pos1 - headers_lc) + 4;
if (NULL == (pos2 = strstr(pos1, "\r\n"))) {
tempMailTo = estrndup(pos1, strlen(pos1));
/* Later, when we remove the Bcc: out of the
header we know it was the last thing. */
pos2 = pos1;
} else {
tempMailTo = estrndup(pos1, pos2 - pos1);
}
token = strtok(tempMailTo, ",");
while (token != NULL)
{
SMTP_SKIP_SPACE(token);
snprintf(Buffer, MAIL_BUFFER_SIZE, "RCPT TO:<%s>\r\n", token);
if ((res = Post(Buffer)) != SUCCESS) {
efree(tempMailTo);
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
efree(tempMailTo);
return (res);
}
token = strtok(NULL, ",");
}
efree(tempMailTo);
/* Now that we've identified that we've a Bcc list,
remove it from the current header. */
if (NULL == (stripped_header = ecalloc(1, strlen(headers)))) {
return OUT_OF_MEMORY;
}
/* headers = point to string start of header
pos1 = pointer IN headers where the Bcc starts
'4' = Length of the characters 'bcc:'
Because we've added +4 above for parsing the Emails
we've to substract them here. */
memcpy(stripped_header, headers, pos1 - headers - 4);
if (pos1 != pos2) {
/* if pos1 != pos2 , pos2 points to the rest of the headers.
Since pos1 != pos2 if "\r\n" was found, we know those characters
are there and so we jump over them (else we would generate a new header
which would look like "\r\n\r\n". */
memcpy(stripped_header + (pos1 - headers - 4), pos2 + 2, strlen(pos2) - 2);
}
}
}
/* Simplify the code that we create a copy of stripped_header no matter if
we actually strip something or not. So we've a single efree() later. */
if (headers && !stripped_header) {
if (NULL == (stripped_header = estrndup(headers, strlen(headers)))) {
return OUT_OF_MEMORY;
}
}
if ((res = Post("DATA\r\n")) != SUCCESS) {
if (stripped_header) {
efree(stripped_header);
}
return (res);
}
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
if (stripped_header) {
efree(stripped_header);
}
return (res);
}
/* send message header */
if (Subject == NULL) {
res = PostHeader(RPath, "No Subject", mailTo, stripped_header TSRMLS_CC);
} else {
res = PostHeader(RPath, Subject, mailTo, stripped_header TSRMLS_CC);
}
if (stripped_header) {
efree(stripped_header);
}
if (res != SUCCESS) {
return (res);
}
/* Escape \n. sequences
* We use php_str_to_str() and not php_str_replace_in_subject(), since the latter
* uses ZVAL as it's parameters */
data_cln = php_str_to_str(data, strlen(data), PHP_WIN32_MAIL_DOT_PATTERN, sizeof(PHP_WIN32_MAIL_DOT_PATTERN) - 1,
PHP_WIN32_MAIL_DOT_REPLACE, sizeof(PHP_WIN32_MAIL_DOT_REPLACE) - 1, &data_cln_len);
if (!data_cln) {
data_cln = estrdup("");
data_cln_len = 1;
}
/* send message contents in 1024 chunks */
{
char c, *e2, *e = data_cln + data_cln_len;
p = data_cln;
while (e - p > 1024) {
e2 = p + 1024;
c = *e2;
*e2 = '\0';
if ((res = Post(p)) != SUCCESS) {
efree(data_cln);
return(res);
}
*e2 = c;
p = e2;
}
if ((res = Post(p)) != SUCCESS) {
efree(data_cln);
return(res);
}
}
efree(data_cln);
/*send termination dot */
if ((res = Post("\r\n.\r\n")) != SUCCESS)
return (res);
if ((res = Ack(&server_response)) != SUCCESS) {
SMTP_ERROR_RESPONSE(server_response);
return (res);
}
return (SUCCESS);
}
static int addToHeader(char **header_buffer, const char *specifier, char *string)
{
if (NULL == (*header_buffer = erealloc(*header_buffer, strlen(*header_buffer) + strlen(specifier) + strlen(string) + 1))) {
return 0;
}
sprintf(*header_buffer + strlen(*header_buffer), specifier, string);
return 1;
}
/*********************************************************************
// Name: PostHeader
// Input: 1) return path
// 2) Subject
// 3) destination address
// 4) headers
// Output: Error code or Success
// Description:
// Author/Date: jcar 20/9/96
// History:
//********************************************************************/
static int PostHeader(char *RPath, char *Subject, char *mailTo, char *xheaders TSRMLS_DC)
{
/* Print message header according to RFC 822 */
/* Return-path, Received, Date, From, Subject, Sender, To, cc */
int res;
char *header_buffer;
char *headers_lc = NULL;
size_t i;
if (xheaders) {
if (NULL == (headers_lc = estrdup(xheaders))) {
return OUT_OF_MEMORY;
}
for (i = 0; i < strlen(headers_lc); i++) {
headers_lc[i] = tolower(headers_lc[i]);
}
}
header_buffer = ecalloc(1, MAIL_BUFFER_SIZE);
if (!xheaders || !strstr(headers_lc, "date:")) {
time_t tNow = time(NULL);
char *dt = php_format_date("r", 1, tNow, 1 TSRMLS_CC);
snprintf(header_buffer, MAIL_BUFFER_SIZE, "Date: %s\r\n", dt);
efree(dt);
}
if (!headers_lc || !strstr(headers_lc, "from:")) {
if (!addToHeader(&header_buffer, "From: %s\r\n", RPath)) {
goto PostHeader_outofmem;
}
}
if (!addToHeader(&header_buffer, "Subject: %s\r\n", Subject)) {
goto PostHeader_outofmem;
}
/* Only add the To: field from the $to parameter if isn't in the custom headers */
if ((headers_lc && (!strstr(headers_lc, "\r\nto:") && (strncmp(headers_lc, "to:", 3) != 0))) || !headers_lc) {
if (!addToHeader(&header_buffer, "To: %s\r\n", mailTo)) {
goto PostHeader_outofmem;
}
}
if (xheaders) {
if (!addToHeader(&header_buffer, "%s\r\n", xheaders)) {
goto PostHeader_outofmem;
}
}
if (headers_lc) {
efree(headers_lc);
}
if ((res = Post(header_buffer)) != SUCCESS) {
efree(header_buffer);
return (res);
}
efree(header_buffer);
if ((res = Post("\r\n")) != SUCCESS) {
return (res);
}
return (SUCCESS);
PostHeader_outofmem:
if (headers_lc) {
efree(headers_lc);
}
return OUT_OF_MEMORY;
}
/*********************************************************************
// Name: MailConnect
// Input: None
// Output: None
// Description: Connect to the mail host and receive the welcome message.
// Author/Date: jcar 20/9/96
// History:
//********************************************************************/
static int MailConnect()
{
int res;
short portnum;
/* Create Socket */
if ((sc = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
return (FAILED_TO_OBTAIN_SOCKET_HANDLE);
/* Get our own host name */
if (gethostname(LocalHost, HOST_NAME_LEN))
return (FAILED_TO_GET_HOSTNAME);
/* Resolve the servers IP */
/*
if (!isdigit(MailHost[0])||!gethostbyname(MailHost))
{
return (FAILED_TO_RESOLVE_HOST);
}
*/
portnum = (short) INI_INT("smtp_port");
if (!portnum) {
portnum = 25;
}
/* Connect to server */
sock_in.sin_family = AF_INET;
sock_in.sin_port = htons(portnum);
sock_in.sin_addr.S_un.S_addr = GetAddr(MailHost);
if (connect(sc, (LPSOCKADDR) & sock_in, sizeof(sock_in)))
return (FAILED_TO_CONNECT);
/* receive Server welcome message */
res = Ack(NULL);
return (res);
}
/*********************************************************************
// Name: Post
// Input:
// Output:
// Description:
// Author/Date: jcar 20/9/96
// History:
//********************************************************************/
static int Post(LPCSTR msg)
{
int len = strlen(msg);
int slen;
int index = 0;
while (len > 0) {
if ((slen = send(sc, msg + index, len, 0)) < 1)
return (FAILED_TO_SEND);
len -= slen;
index += slen;
}
return (SUCCESS);
}
/*********************************************************************
// Name: Ack
// Input:
// Output:
// Description:
// Get the response from the server. We only want to know if the
// last command was successful.
// Author/Date: jcar 20/9/96
// History:
//********************************************************************/
static int Ack(char **server_response)
{
static char buf[MAIL_BUFFER_SIZE];
int rlen;
int Index = 0;
int Received = 0;
again:
if ((rlen = recv(sc, buf + Index, ((MAIL_BUFFER_SIZE) - 1) - Received, 0)) < 1) {
return (FAILED_TO_RECEIVE);
}
Received += rlen;
buf[Received] = 0;
/*err_msg fprintf(stderr,"Received: (%d bytes) %s", rlen, buf + Index); */
/* Check for newline */
Index += rlen;
/* SMPT RFC says \r\n is the only valid line ending, who are we to argue ;)
* The response code must contain at least 5 characters ex. 220\r\n */
if (Received < 5 || buf[Received - 1] != '\n' || buf[Received - 2] != '\r') {
goto again;
}
if (buf[0] > '3') {
/* If we've a valid pointer, return the SMTP server response so the error message contains more information */
if (server_response) {
int dec = 0;
/* See if we have something like \r, \n, \r\n or \n\r at the end of the message and chop it off */
if (Received > 2) {
if (buf[Received-1] == '\n' || buf[Received-1] == '\r') {
dec++;
if (buf[Received-2] == '\r' || buf[Received-2] == '\n') {
dec++;
}
}
}
*server_response = estrndup(buf, Received - dec);
}
return (SMTP_SERVER_ERROR);
}
return (SUCCESS);
}
/*********************************************************************
// Name: unsigned long GetAddr (LPSTR szHost)
// Input:
// Output:
// Description: Given a string, it will return an IP address.
// - first it tries to convert the string directly
// - if that fails, it tries o resolve it as a hostname
//
// WARNING: gethostbyname() is a blocking function
// Author/Date: jcar 20/9/96
// History:
//********************************************************************/
static unsigned long GetAddr(LPSTR szHost)
{
LPHOSTENT lpstHost;
u_long lAddr = INADDR_ANY;
/* check that we have a string */
if (*szHost) {
/* check for a dotted-IP address string */
lAddr = inet_addr(szHost);
/* If not an address, then try to resolve it as a hostname */
if ((lAddr == INADDR_NONE) && (strcmp(szHost, "255.255.255.255"))) {
lpstHost = gethostbyname(szHost);
if (lpstHost) { /* success */
lAddr = *((u_long FAR *) (lpstHost->h_addr));
} else {
lAddr = INADDR_ANY; /* failure */
}
}
}
return (lAddr);
} /* end GetAddr() */
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