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main.c
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main.c
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/*
** main for mailsend - a simple mail sender via SMTP protocol
**
** Limitations and Comments:
** I needed to send a alert mail from a bare-bone networked NT machine,
** but could not find a simple mail sender to do this (not surprised!).
** so I wrote this one!
**
**
** Development History:
** who when why
** muquit@muquit.com Mar-23-2001 first cut
*/
#define __MAIN__ 1
#include "mailsend.h"
/* exits after writing the usage */
static void usage(void)
{
char
**p;
static char
*options[]=
{
" -copyright - show copyright information",
" -4 - Force to use IPv4 address of SMTP server",
" -6 - Force to use IPv6 address of SMTP server",
" -smtp hostname/IP* - Hostname/IP address of the SMTP server",
" -port SMTP port - SMTP port",
" -domain domain - domain name for SMTP HELO/EHLO",
" -t to,to..* - email address/es of the recipient/s",
" -cc cc,cc.. - carbon copy address/es",
" +cc - do not ask for Carbon Copy",
" -ct seconds - Connect timeout. Default is 5 seconds",
#if defined(SO_RCVTIMEO)
" -read-timeout seconds - Read timeout. Default is 5 seconds",
#endif /* SO_RCVTIMEO */
" -bc bcc,bcc.. - blind carbon copy address/es",
" +bc - do not ask for Blind carbon copy",
" +D - do not add Date header",
" -f address* - email address of the sender",
" -sub subject - subject",
" -list_address file - a file containing a list of email addresses",
" -log file - write log messages to this file",
" -cs character set - for text/plain attachments (default is us-ascii)",
" -separator character - sepatorator used with -attach. Default is comma (,)",
" If used must be specified before -attach",
" -enc-type type - encoding type. base64, 8bit, 7bit etc.",
" Default is base64. Special type is \"none\"",
" -aname name - name of the attachment. Default is filename",
" -content-id id - content-id in the attachment",
" -mime-type type - MIME type",
" -dispostion val - \"attachment\" or \"inline\". Default is \"attachment\"",
" -attach file,mime_type,[i/a] (i=inline,a=attachment)",
" - attach this file as attachment or inline",
" -show-attach - show attachment in verbose mode, default is no",
" -show-mime-types - show the compiled in MIME types",
" -M \"one line msg\" - attach this one line text message",
" -content-type type - Content type. Default: multipart/mixed",
" -msg-body path - Path of the file to include as body of mail",
" -embed-image image - Path of image to embed in HTML",
" -H \"header\" - Add custom Header",
" -name \"Full Name\" - add name in the From header",
" -v - verbose mode",
" -V - show version info",
" -w - wait for a CR after sending the mail",
" -rt email_address - add Reply-To header",
" -rrr email_address - request read receipts to this address",
" -ssl - SMTP over SSL",
" -starttls - use STARTTLS if the server supports it",
" -auth - try CRAM-MD5,LOGIN,PLAIN in that order",
" -auth-cram-md5 - use AUTH CRAM-MD5 authentication",
" -auth-plain - use AUTH PLAIN authentication",
" -auth-login - use AUTH LOGIN authentication",
" -user username - username for ESMTP authentication",
" -pass password - password for ESMTP authentication",
" -example - show examples",
" -ehlo - force EHLO",
" -info - show SMTP server information",
" -help - shows this help",
" -q - quiet",
(char *) NULL
};
(void) printf("\n");
(void) printf(" Version: %.1024s\n\n",MAILSEND_VERSION);
(void) printf(" Copyright: %.1024s\n\n",NO_SPAM_STATEMENT);
#ifdef HAVE_OPENSSL
(void) fprintf(stdout," (Compiled with OpenSSL version: %s)\n",
SSLeay_version(SSLEAY_VERSION));
#else
(void) fprintf(stdout," (Not compiled with OpenSSL)\n");
#endif /* HAVE_OPENSSL */
(void) printf(" usage: mailsend [options]\n");
(void) printf(" Where the options are:\n");
for (p=options; *p != NULL; p++)
(void) printf("%s\n",*p);
(void) fprintf(stdout,"\n The options with * must be specified\n");
(void) fprintf(stdout,
" Environment variables:\n"
" SMTP_USER_PASS for plain text password (-pass)\n");
}
#if 0
static void show_examplesX(void)
{
(void) fprintf(stdout," Example (Note: type without newline):\n");
(void) fprintf(stdout,
" Show server info\n"
" ================\n"
" mailsend -v -info -port 587 -smtp smtp.gmail.com\n"
" mailsend -v -info -ssl -port 465 -smtp smtp.gmail.com\n"
" mailsend -v -info -smtp smtp.example.com -ct 2\n\n");
(void) fprintf(stdout,
" STARTTLS + AUTHENTICATION\n"
" =========================\n");
(void) fprintf(stdout,
" mailsend -to user@gmail.com -from user@gmail.com\n"
" -starttls -port 587 -auth\n"
" -smtp smtp.gmail.com\n"
" -sub test +cc +bc -v\n"
" -user you -pass \"your_password\"\n");
(void) fprintf(stdout,
" Note: Password can be set by env var SMTP_USER_PASS instead of -pass\n\n");
(void) fprintf(stdout,
" SSL + AUTHENTICATION\n"
" ====================\n");
(void) fprintf(stdout,
" mailsend -to user@gmail.com -from user@gmail.com\n"
" -ssl -port 465 -auth\n"
" -smtp smtp.gmail.com\n"
" -sub test +cc +bc -v\n"
" -user you -pass \"your_password\"\n\n");
(void) fprintf(stdout,
" As -auth is specified, CRAM-MD5, LOGIN, PLAIN will be tried in that order.\n"
" Use -auth-cram-md5, -auth-plan, -auth-login for specific auth mechanism.\n\n"
" Note: Password can be set by env var SMTP_USER_PASS instead of -pass\n\n");
(void) fprintf(stdout,
" Attachments\n"
" ===========\n");
(void) fprintf(stdout,
" mailsend -f user@example.com -smtp 10.100.30.1\n"
" -t user@example.com -sub test -attach \"file.txt,text/plain\"\n"
" -attach \"/usr/file.gif,image/gif\" -attach \"file.jpeg,image/jpg\"\n\n");
(void) fprintf(stdout,
" The name of the attachment will be file.gif and file.jpeg.\n"
" If you want the name to be different, add the fourth argument with -attach.\n"
" Note: you MUST have to give the attachment type in this case\n\n");
(void) fprintf(stdout,
" mailsend -f user@example.com -smtp 10.100.30.1\n"
" -t user@example.com -sub test -attach \"file.txt,text/plain\"\n"
" -attach \"/usr/file.gif,image/gif,a,bar.gif\" -attach \"file.jpeg,image/jpg\"\n\n");
(void) fprintf(stdout,
" mailsend -f user@example.com -smtp 192.168.0.2\n"
" -t user@example.com -sub test +cc +bc\n"
" -attach \"c:\\file.gif,image/gif\" -M \"Sending a GIF file\"\n\n");
(void) fprintf(stdout,
" mailsend -f user@example.com -smtp 192.168.0.2\n"
" -t user@example.com -sub test +cc +bc -cs \"ISO-8859-1\"\n"
" -attach \"file2.txt,text/plain\"\n\n");
(void) fprintf(stdout,
" Inline Attachment\n"
" =================\n");
(void) fprintf(stdout,
" mailsend -f user@example.com -d example.com -smtp 10.100.30.1\n"
" -t user@example.com -sub test -attach \"nf.jpg,image/jpeg,i\"\n"
" -M \"body line1: content disposition is inline\"\n"
" -M \"body line2: this is line2 of the body\"\n\n");
}
#endif /* if 0 */
int main(int argc,char **argv)
{
char
*x,
*y,
buf[BUFSIZ],
encrypted_pass[128], /* 80 bytes actually */
*cipher=NULL,
*option;
int
smtp_info=0,
is_mime=0,
add_dateh=1,
port=(-1),
rc = (-1),
no_cc=1,
no_bcc=1,
i;
char
*address_file=NULL,
*helo_domain=NULL,
*smtp_server=NULL,
*attach_file=NULL,
*msg_body_file=NULL, /* back in 1.17b15 */
*the_msg=NULL,
*custom_header=NULL,
*to=NULL,
*save_to=NULL,
*save_cc=NULL,
*save_bcc=NULL,
*from=NULL,
*sub=NULL,
*cc=NULL,
*bcc=NULL,
*rt=NULL,
*rrr=NULL;
g_verbose=0;
g_connect_timeout = DEFAULT_CONNECT_TIMEOUT; /* 5 secs */
g_read_timeout = DEFAULT_READ_TIMEOUT; /* 5 secs */
g_quiet=0;
g_wait_for_cr=0;
g_do_auth=0;
g_esmtp=0;
g_auth_plain=0;
g_auth_cram_md5=0;
g_auth_login=0;
g_do_ssl=0;
g_do_starttls=0;
g_log_fp = NULL;
g_show_attachment_in_log = 0;
g_use_protocol = MSOCK_USE_AUTO; /* detect IPv4 or IPv6 */
g_force = MUTILS_FALSE;
memset(g_log_file,0,sizeof(g_log_file));
memset(g_username,0,sizeof(g_username));
memset(g_userpass,0,sizeof(g_userpass));
memset(encrypted_pass, 0, sizeof(encrypted_pass));
memset(g_from_name,0,sizeof(g_from_name));
memset(g_content_type,0,sizeof(g_content_type));
memset(g_attach_sep, 0, sizeof(g_attach_sep));
memset(g_attach_name, 0, sizeof(g_attach_name));
memset(g_content_transfer_encoding, 0, sizeof(g_content_transfer_encoding));
memset(g_mime_type, 0, sizeof(g_mime_type));
memset(g_content_id, 0, sizeof(g_content_id));
/* (void) strcpy(g_content_transfer_encoding,"base64"); */ /* no default */
(void) strcpy(g_content_disposition,"attachment");
(void) strcpy(g_attach_sep,",");
(void) strcpy(g_charset,DEFAULT_CHARSET);
/*
No default for mime_type, we will detect from file extensinon
if no mime type is specified with -mime-type
*/
/*
(void) strcpy(g_mime_type,"text/plain");
*/
for (i=1; i < argc; i++)
{
option=argv[i];
switch (*(option+1))
{
case 'a':
{
if (strncmp("attach",option+1,6) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing file to attach");
rc = 1;
goto ExitProcessing;
}
attach_file=argv[i];
add_attachment_to_list(attach_file);
}
}
else if (strncmp("aname",option+1,5) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing attachment name");
rc = 1;
goto ExitProcessing;
}
mutilsSafeStrcpy(g_attach_name,argv[i],sizeof(g_attach_name)-1);
}
}
else if (strncmp("auth-plain",option+1,
strlen("auth-plain"))==0)
{
if (*option == '-')
{
g_auth_plain=1;
}
}
else if (strncmp("auth-cram-md5",option+1,
strlen("auth-cram-md5"))==0)
{
if (*option == '-')
{
g_auth_cram_md5=1;
}
}
else if (strncmp("auth-login",option+1,
strlen("auth-login"))==0)
{
if (*option == '-')
{
g_auth_login=1;
}
}
else if (strncmp("auth",option+1,
strlen("auth"))==0)
{
if (*option == '-')
{
g_auth_plain=1;
g_auth_login=1;
g_auth_cram_md5=1;
g_auth_login=1;
g_do_auth=1;
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'b':
{
if (strncmp("bcc",option+1,2) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing BCc address/es");
rc = 1;
goto ExitProcessing;
}
bcc=argv[i];
save_bcc=mutilsStrdup(bcc);
/* collapse all spaces to a comma */
mutilsSpacesToChar(bcc,',');
addAddressToList(bcc,"Bcc");
}
else if (*option == '+')
{
no_bcc=1;
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case '4':
{
if (strncmp("4", option + 1,1) == 0)
{
if (*option == '-')
{
g_use_protocol = MSOCK_USE_IPV4;
}
}
break;
}
case '6':
{
if (strncmp("6", option + 1,1) == 0)
{
if (*option == '-')
{
g_use_protocol = MSOCK_USE_IPV6;
}
}
break;
}
case 'c':
{
if (strncmp("cc",option+1,2) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing Cc address/es");
rc = 1;
goto ExitProcessing;
}
cc=argv[i];
save_cc=mutilsStrdup(cc);
/* collapse all spaces to a comma */
mutilsSpacesToChar(cc,',');
addAddressToList(cc,"Cc");
}
else if (*option == '+')
{
no_cc=1;
}
}
else if (strncmp("cs",option+1,2) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing character set");
rc = 1;
goto ExitProcessing;
}
mutilsSafeStrcpy(g_charset,argv[i],sizeof(g_charset)-1);
}
}
else if (strncmp("ct", option + 1, 2) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing connect timeout with -ct");
rc = 1;
goto ExitProcessing;
}
g_connect_timeout = atoi(argv[i]);
}
}
else if (strncmp("content-type", option+1, 12)==0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing content-type value");
rc = 1;
goto ExitProcessing;
}
mutilsSafeStrcpy(g_content_type,argv[i],sizeof(g_content_type)-1);
}
}
else if (strncmp("content-disposition", option + 1, 12) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing content-dispostion value");
rc = 1;
goto ExitProcessing;
}
if ((strcmp(argv[i],"inline") == 0) || strcmp(argv[i], "attachment") == 0)
{
mutilsSafeStrcpy(g_content_disposition,argv[i],
sizeof(g_content_disposition)-1);
}
else
{
errorMsg("Invalid value for -content-disposition");
rc = 1;
goto ExitProcessing;
}
}
}
else if (strncmp("content-id", option + 1, 10) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing content-id value");
rc = 1;
goto ExitProcessing;
}
mutilsSafeStrcpy(g_content_id,argv[i],sizeof(g_content_id)-1);
}
}
else if (strncmp("copyright", option + 1, 5) == 0)
{
print_copyright();
rc = 0;
goto ExitProcessing;
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'D':
{
if (strncmp("D",option+1,1) == 0)
{
if (*option == '+')
{
add_dateh=0;
}
}
break;
}
case 'd':
{
if (strncmp("domain",option+1,6) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing domain name");
rc = 1;
goto ExitProcessing;
}
helo_domain=argv[i];
}
}
else if (strncmp("disposition", option + 1, 6) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing content dispostion value");
rc = 1;
goto ExitProcessing;
}
if ((strcmp(argv[i],"inline") == 0) || strcmp(argv[i], "attachment") == 0)
{
mutilsSafeStrcpy(g_content_disposition,argv[i],sizeof(g_content_disposition)-1);
}
else
{
errorMsg("Invalid value for -disposition");
rc = 1;
goto ExitProcessing;
}
}
}
break;
}
case 'e':
{
if (strncmp("example",option+1,2) == 0)
{
if (*option == '-')
{
show_examples();
rc = 1;
goto ExitProcessing;
}
}
else if (strncmp("ehlo",option+1,4) == 0)
{
if (*option == '-')
{
g_esmtp=1;
}
}
else if (strncmp("enc-type",option+1,5) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing encoding type");
rc = 1;
goto ExitProcessing;
}
mutilsSafeStrcpy(g_content_transfer_encoding,
argv[i],
sizeof(g_content_transfer_encoding)-1);
}
}
else if (strncmp("embed-image", option + 1, 7) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing image for -embded-image");
rc = 1;
goto ExitProcessing;
}
add_embed_image_to_attachment_list(argv[i]);
/* TODO */
}
}
break;
}
case 'f':
{
if (strncmp("from",option+1,1) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing From address/es");
rc = 1;
goto ExitProcessing;
}
from=argv[i];
}
}
break;
}
case 'x':
{
if (strncmp("xforce",option+1,1) == 0)
{
if (*option == '-')
{
g_force = MUTILS_TRUE;
}
}
break;
}
case 'h':
{
if (strncmp("help",option+1,1) == 0)
{
usage();
rc = 0;
goto ExitProcessing;
}
/* won't be here */
break;
}
case 'i':
{
if (strncmp("info",option+1,2) == 0)
{
smtp_info=1;
}
break;
}
case 'l':
{
if (strncmp("list_address",option+1,3) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing address list file");
rc = 1;
goto ExitProcessing;
}
address_file=argv[i];
}
}
if (strncmp("log",option+1,3) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing address log file");
rc = 1;
goto ExitProcessing;
}
g_log_fp = fopen(argv[i], "a");
if (g_log_fp == NULL)
{
errorMsg("Could not open log file %s for writing (%s)",
argv[i],
strerror(errno));
rc = 1;
goto ExitProcessing;
}
/*
** tell msock lib to write error message to log file
*/
msock_set_logfp(g_log_fp);
mutilsSafeStrcpy(g_log_file,argv[i],sizeof(g_log_file)-1);
}
}
break;
}
case 'p':
{
if (strncmp("port",option+1,2) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing SMTP Port with -port");
rc = 1;
goto ExitProcessing;
}
port=atoi(argv[i]);
}
}
else if (strncmp("pass",option+1,2) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing password with -pass");
rc = 1;
goto ExitProcessing;
}
(void) snprintf(g_userpass,sizeof(g_userpass)-1,
"%s",argv[i]);
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'H':
{
if (strncmp("Header",option+1,1) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing custom header");
rc = 1;
goto ExitProcessing;
}
custom_header=argv[i];
add_customer_header_to_list(custom_header);
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'M':
{
if (strncmp("Message",option+1,1) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing text message");
rc = 1;
goto ExitProcessing;
}
the_msg=xStrdup(argv[i]);
add_oneline_to_attachment_list(the_msg);
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'm':
{
if (strncmp("mime-type",option+1,9) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing mime type");
rc = 1;
goto ExitProcessing;
}
mutilsSafeStrcpy(g_mime_type,argv[i],sizeof(g_mime_type)-1);
}
}
else if (strncmp("msg-body",option+1,5) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing path of message body file");
rc = 1;
goto ExitProcessing;
}
msg_body_file = argv[i];
add_msg_body_to_attachment_list(argv[i]);
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'n':
{
if (strncmp("name",option+1,3) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing Name with -n");
rc = 1;
goto ExitProcessing;
}
(void) snprintf(g_from_name,sizeof(g_from_name)-1,
"%s",argv[i]);
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 's':
{
if (strncmp("smtp",option+1,3) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing smtp server");
rc = 1;
goto ExitProcessing;
}
smtp_server=argv[i];
}
}
else if (strncmp("subject",option+1,3) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing subject with -sub");
rc = 1;
goto ExitProcessing;
}
sub=argv[i];
}
}
else if (strncmp("ssl", option + 1, 3) == 0)
{
#ifdef HAVE_OPENSSL
g_do_ssl=1;
#else
(void) fprintf(stderr,"Error: '-ssl' not available, not compiled with OpenSSL\n");
rc = 1;
goto ExitProcessing;
#endif /* HAVE_OPENSSL */
}
else if (strncmp("starttls",option+1,3) == 0)
{
#ifdef HAVE_OPENSSL
g_do_starttls=1;
#else
(void) fprintf(stderr,"Error: '-starttls' not available, not compiled with OpenSSL\n");
rc = 1;
goto ExitProcessing;
#endif /* HAVE_OPENSSL */
}
else if (strncmp("show-attach", option + 1, 9) == 0)
{
g_show_attachment_in_log = 1;
}
else if (strncmp("show-mime-types",option+1,9) == 0)
{
show_mime_types();
rc = 0;
goto ExitProcessing;
}
else if (strncmp("separator", option + 1, 4) == 0)
{
if (*option == '-')
{
i++;
if (i == argc)
{
errorMsg("Missing separator");
rc = 1;
goto ExitProcessing;
}
(void) snprintf(g_attach_sep,sizeof(g_attach_sep)-1,"%s",argv[i]);
if (strlen(g_attach_sep) != 1)
{
errorMsg("Invalid separator character specified");
rc = 1;
goto ExitProcessing;
}
}
}
else
{
errorMsg("Unknown flag: %s\n",option);
rc = 1;
goto ExitProcessing;
}
break;
}
case 'u':
{
if (strncmp("user",option+1,2) == 0)
{