/* * 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: sendmail.c,v 1.65.2.2 2006/02/08 21:03:36 johannes Exp $ */ #include "php.h" /*php specific */ #include #include #ifndef NETWARE #include #include "time.h" #else /* NETWARE */ #include #endif /* NETWARE */ #include #include #ifndef NETWARE #include #include #include #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); */ sprintf(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]); } } if (NULL == (header_buffer = ecalloc(1, MAIL_BUFFER_SIZE))) { efree(headers_lc); return OUT_OF_MEMORY; } if (!xheaders || !strstr(headers_lc, "date:")) { time_t tNow = time(NULL); char *dt = php_format_date("r", 1, tNow, 1 TSRMLS_CC); sprintf(header_buffer, "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() */