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Importación de libsmtpc.

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Félix Arreola Rodríguez 2022-10-28 21:49:16 -05:00
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# http://www.gnu.org/software/automake
Makefile.in
# http://www.gnu.org/software/autoconf
autom4te.cache
aclocal.m4
compile
configure
depcomp
install-sh
missing
build-aux/
config.h.in
config.h
Makefile
config.log
config.status
.deps
src/smtp-c.pc
*.o
*.lo
*.la
src/.libs
stamp-h1
*~
m4
po/Makefile.in.in
po/Makevars.template
po/POTFILES
po/Rules-quot
po/boldquot.sed
po/en@boldquot.header
po/en@quot.header
po/insert-header.sin
po/quot.sed
po/remove-potcdate.sed
po/remove-potcdate.sin
po/stamp-po
*.gmo
*.mo

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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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Installation Instructions
*************************
Copyright (C) 1994-1996, 1999-2002, 2004-2016 Free Software
Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved. This file is offered as-is,
without warranty of any kind.
Basic Installation
==================
Briefly, the shell command './configure && make && make install'
should configure, build, and install this package. The following
more-detailed instructions are generic; see the 'README' file for
instructions specific to this package. Some packages provide this
'INSTALL' file but do not implement all of the features documented
below. The lack of an optional feature in a given package is not
necessarily a bug. More recommendations for GNU packages can be found
in *note Makefile Conventions: (standards)Makefile Conventions.
The 'configure' shell script attempts to guess correct values for
various system-dependent variables used during compilation. It uses
those values to create a 'Makefile' in each directory of the package.
It may also create one or more '.h' files containing system-dependent
definitions. Finally, it creates a shell script 'config.status' that
you can run in the future to recreate the current configuration, and a
file 'config.log' containing compiler output (useful mainly for
debugging 'configure').
It can also use an optional file (typically called 'config.cache' and
enabled with '--cache-file=config.cache' or simply '-C') that saves the
results of its tests to speed up reconfiguring. Caching is disabled by
default to prevent problems with accidental use of stale cache files.
If you need to do unusual things to compile the package, please try
to figure out how 'configure' could check whether to do them, and mail
diffs or instructions to the address given in the 'README' so they can
be considered for the next release. If you are using the cache, and at
some point 'config.cache' contains results you don't want to keep, you
may remove or edit it.
The file 'configure.ac' (or 'configure.in') is used to create
'configure' by a program called 'autoconf'. You need 'configure.ac' if
you want to change it or regenerate 'configure' using a newer version of
'autoconf'.
The simplest way to compile this package is:
1. 'cd' to the directory containing the package's source code and type
'./configure' to configure the package for your system.
Running 'configure' might take a while. While running, it prints
some messages telling which features it is checking for.
2. Type 'make' to compile the package.
3. Optionally, type 'make check' to run any self-tests that come with
the package, generally using the just-built uninstalled binaries.
4. Type 'make install' to install the programs and any data files and
documentation. When installing into a prefix owned by root, it is
recommended that the package be configured and built as a regular
user, and only the 'make install' phase executed with root
privileges.
5. Optionally, type 'make installcheck' to repeat any self-tests, but
this time using the binaries in their final installed location.
This target does not install anything. Running this target as a
regular user, particularly if the prior 'make install' required
root privileges, verifies that the installation completed
correctly.
6. You can remove the program binaries and object files from the
source code directory by typing 'make clean'. To also remove the
files that 'configure' created (so you can compile the package for
a different kind of computer), type 'make distclean'. There is
also a 'make maintainer-clean' target, but that is intended mainly
for the package's developers. If you use it, you may have to get
all sorts of other programs in order to regenerate files that came
with the distribution.
7. Often, you can also type 'make uninstall' to remove the installed
files again. In practice, not all packages have tested that
uninstallation works correctly, even though it is required by the
GNU Coding Standards.
8. Some packages, particularly those that use Automake, provide 'make
distcheck', which can by used by developers to test that all other
targets like 'make install' and 'make uninstall' work correctly.
This target is generally not run by end users.
Compilers and Options
=====================
Some systems require unusual options for compilation or linking that
the 'configure' script does not know about. Run './configure --help'
for details on some of the pertinent environment variables.
You can give 'configure' initial values for configuration parameters
by setting variables in the command line or in the environment. Here is
an example:
./configure CC=c99 CFLAGS=-g LIBS=-lposix
*Note Defining Variables::, for more details.
Compiling For Multiple Architectures
====================================
You can compile the package for more than one kind of computer at the
same time, by placing the object files for each architecture in their
own directory. To do this, you can use GNU 'make'. 'cd' to the
directory where you want the object files and executables to go and run
the 'configure' script. 'configure' automatically checks for the source
code in the directory that 'configure' is in and in '..'. This is known
as a "VPATH" build.
With a non-GNU 'make', it is safer to compile the package for one
architecture at a time in the source code directory. After you have
installed the package for one architecture, use 'make distclean' before
reconfiguring for another architecture.
On MacOS X 10.5 and later systems, you can create libraries and
executables that work on multiple system types--known as "fat" or
"universal" binaries--by specifying multiple '-arch' options to the
compiler but only a single '-arch' option to the preprocessor. Like
this:
./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
CPP="gcc -E" CXXCPP="g++ -E"
This is not guaranteed to produce working output in all cases, you
may have to build one architecture at a time and combine the results
using the 'lipo' tool if you have problems.
Installation Names
==================
By default, 'make install' installs the package's commands under
'/usr/local/bin', include files under '/usr/local/include', etc. You
can specify an installation prefix other than '/usr/local' by giving
'configure' the option '--prefix=PREFIX', where PREFIX must be an
absolute file name.
You can specify separate installation prefixes for
architecture-specific files and architecture-independent files. If you
pass the option '--exec-prefix=PREFIX' to 'configure', the package uses
PREFIX as the prefix for installing programs and libraries.
Documentation and other data files still use the regular prefix.
In addition, if you use an unusual directory layout you can give
options like '--bindir=DIR' to specify different values for particular
kinds of files. Run 'configure --help' for a list of the directories
you can set and what kinds of files go in them. In general, the default
for these options is expressed in terms of '${prefix}', so that
specifying just '--prefix' will affect all of the other directory
specifications that were not explicitly provided.
The most portable way to affect installation locations is to pass the
correct locations to 'configure'; however, many packages provide one or
both of the following shortcuts of passing variable assignments to the
'make install' command line to change installation locations without
having to reconfigure or recompile.
The first method involves providing an override variable for each
affected directory. For example, 'make install
prefix=/alternate/directory' will choose an alternate location for all
directory configuration variables that were expressed in terms of
'${prefix}'. Any directories that were specified during 'configure',
but not in terms of '${prefix}', must each be overridden at install time
for the entire installation to be relocated. The approach of makefile
variable overrides for each directory variable is required by the GNU
Coding Standards, and ideally causes no recompilation. However, some
platforms have known limitations with the semantics of shared libraries
that end up requiring recompilation when using this method, particularly
noticeable in packages that use GNU Libtool.
The second method involves providing the 'DESTDIR' variable. For
example, 'make install DESTDIR=/alternate/directory' will prepend
'/alternate/directory' before all installation names. The approach of
'DESTDIR' overrides is not required by the GNU Coding Standards, and
does not work on platforms that have drive letters. On the other hand,
it does better at avoiding recompilation issues, and works well even
when some directory options were not specified in terms of '${prefix}'
at 'configure' time.
Optional Features
=================
If the package supports it, you can cause programs to be installed
with an extra prefix or suffix on their names by giving 'configure' the
option '--program-prefix=PREFIX' or '--program-suffix=SUFFIX'.
Some packages pay attention to '--enable-FEATURE' options to
'configure', where FEATURE indicates an optional part of the package.
They may also pay attention to '--with-PACKAGE' options, where PACKAGE
is something like 'gnu-as' or 'x' (for the X Window System). The
'README' should mention any '--enable-' and '--with-' options that the
package recognizes.
For packages that use the X Window System, 'configure' can usually
find the X include and library files automatically, but if it doesn't,
you can use the 'configure' options '--x-includes=DIR' and
'--x-libraries=DIR' to specify their locations.
Some packages offer the ability to configure how verbose the
execution of 'make' will be. For these packages, running './configure
--enable-silent-rules' sets the default to minimal output, which can be
overridden with 'make V=1'; while running './configure
--disable-silent-rules' sets the default to verbose, which can be
overridden with 'make V=0'.
Particular systems
==================
On HP-UX, the default C compiler is not ANSI C compatible. If GNU CC
is not installed, it is recommended to use the following options in
order to use an ANSI C compiler:
./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
and if that doesn't work, install pre-built binaries of GCC for HP-UX.
HP-UX 'make' updates targets which have the same time stamps as their
prerequisites, which makes it generally unusable when shipped generated
files such as 'configure' are involved. Use GNU 'make' instead.
On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
parse its '<wchar.h>' header file. The option '-nodtk' can be used as a
workaround. If GNU CC is not installed, it is therefore recommended to
try
./configure CC="cc"
and if that doesn't work, try
./configure CC="cc -nodtk"
On Solaris, don't put '/usr/ucb' early in your 'PATH'. This
directory contains several dysfunctional programs; working variants of
these programs are available in '/usr/bin'. So, if you need '/usr/ucb'
in your 'PATH', put it _after_ '/usr/bin'.
On Haiku, software installed for all users goes in '/boot/common',
not '/usr/local'. It is recommended to use the following options:
./configure --prefix=/boot/common
Specifying the System Type
==========================
There may be some features 'configure' cannot figure out
automatically, but needs to determine by the type of machine the package
will run on. Usually, assuming the package is built to be run on the
_same_ architectures, 'configure' can figure that out, but if it prints
a message saying it cannot guess the machine type, give it the
'--build=TYPE' option. TYPE can either be a short name for the system
type, such as 'sun4', or a canonical name which has the form:
CPU-COMPANY-SYSTEM
where SYSTEM can have one of these forms:
OS
KERNEL-OS
See the file 'config.sub' for the possible values of each field. If
'config.sub' isn't included in this package, then this package doesn't
need to know the machine type.
If you are _building_ compiler tools for cross-compiling, you should
use the option '--target=TYPE' to select the type of system they will
produce code for.
If you want to _use_ a cross compiler, that generates code for a
platform different from the build platform, you should specify the
"host" platform (i.e., that on which the generated programs will
eventually be run) with '--host=TYPE'.
Sharing Defaults
================
If you want to set default values for 'configure' scripts to share,
you can create a site shell script called 'config.site' that gives
default values for variables like 'CC', 'cache_file', and 'prefix'.
'configure' looks for 'PREFIX/share/config.site' if it exists, then
'PREFIX/etc/config.site' if it exists. Or, you can set the
'CONFIG_SITE' environment variable to the location of the site script.
A warning: not all 'configure' scripts look for a site script.
Defining Variables
==================
Variables not defined in a site shell script can be set in the
environment passed to 'configure'. However, some packages may run
configure again during the build, and the customized values of these
variables may be lost. In order to avoid this problem, you should set
them in the 'configure' command line, using 'VAR=value'. For example:
./configure CC=/usr/local2/bin/gcc
causes the specified 'gcc' to be used as the C compiler (unless it is
overridden in the site shell script).
Unfortunately, this technique does not work for 'CONFIG_SHELL' due to an
Autoconf limitation. Until the limitation is lifted, you can use this
workaround:
CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
'configure' Invocation
======================
'configure' recognizes the following options to control how it
operates.
'--help'
'-h'
Print a summary of all of the options to 'configure', and exit.
'--help=short'
'--help=recursive'
Print a summary of the options unique to this package's
'configure', and exit. The 'short' variant lists options used only
in the top level, while the 'recursive' variant lists options also
present in any nested packages.
'--version'
'-V'
Print the version of Autoconf used to generate the 'configure'
script, and exit.
'--cache-file=FILE'
Enable the cache: use and save the results of the tests in FILE,
traditionally 'config.cache'. FILE defaults to '/dev/null' to
disable caching.
'--config-cache'
'-C'
Alias for '--cache-file=config.cache'.
'--quiet'
'--silent'
'-q'
Do not print messages saying which checks are being made. To
suppress all normal output, redirect it to '/dev/null' (any error
messages will still be shown).
'--srcdir=DIR'
Look for the package's source code in directory DIR. Usually
'configure' can determine that directory automatically.
'--prefix=DIR'
Use DIR as the installation prefix. *note Installation Names:: for
more details, including other options available for fine-tuning the
installation locations.
'--no-create'
'-n'
Run the configure checks, but stop before creating any output
files.
'configure' also accepts some other, not widely useful, options. Run
'configure --help' for more details.

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SUBDIRS = src
#ACLOCAL_AMFLAGS = -I m4
#EXTRA_DIST = build-aux/config.rpath

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AC_INIT([smtp-c], [0.1.0], [], [smtp_c])
AC_REVISION([Revision 1])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
# We need automake
AM_INIT_AUTOMAKE([-Wall -Werror])
AM_PROG_AR
AC_CONFIG_SRCDIR([src/smtp.c])
LT_INIT
# For debian systems, /usr as default
AC_PREFIX_DEFAULT([/usr])
# We need Gcc
AC_PROG_CC
# We need OBJC, for MAC
AC_PROG_OBJC
# Translate this program
#AM_GNU_GETTEXT_VERSION([0.19.3])
#AM_GNU_GETTEXT([external])
ALL_LINGUAS=""
AC_SUBST(ALL_LINGUAS)
AM_PROG_CC_C_O
# Revisar el host
AC_CANONICAL_HOST
case $host_os in
*mingw32* ) MINGW32=yes;;
* ) MINGW32=no;;
esac
case $host_os in
*cygwin* ) CYGWIN=yes;;
* ) CYGWIN=no;;
esac
case $host_os in
*linux* ) LINUX=yes;;
* ) LINUX=no;;
esac
case $host_os in
*darwin* ) MACOSX=yes;;
* ) MACOSX=no;;
esac
AM_CONDITIONAL(MINGW32, test x$MINGW32 = xyes)
AM_CONDITIONAL(LINUX, test x$LINUX = xyes)
AM_CONDITIONAL(MACOSX, test x$MACOSX = xyes)
# Check for pkg-config
#PKG_PROG_PKG_CONFIG
#OPENSSL_VERSION=0.9.8
#AC_MSG_CHECKING([if you have openssl installed on your system])
#PKG_CHECK_EXISTS([openssl >= $OPENSSL_VERSION], [AC_MSG_RESULT([yes])], [AC_MSG_FAILURE([openssl not found in your system])])
#PKG_CHECK_MODULES(OPENSSL, [openssl >= $OPENSSL_VERSION], [], [])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([
Makefile
src/Makefile
src/smtp-c.pc
])
AC_OUTPUT

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# Automake file for smtp-c
lib_LTLIBRARIES = libsmtpc.la
libsmtpc_la_SOURCES = smtp.c smtp.h \
base64.c base64.h
#libsmtpc_la_CFLAGS = $(OPENSSL_CFLAGS)
#libsmtpc_la_LDFLAGS = $(OPENSSL_LIBS) -version-info 0:1:0 -no-undefined -export-symbols $(srcdir)/libsmtpc.sym
libsmtpc_la_LDFLAGS = -version-info 0:1:0 -no-undefined -export-symbols $(srcdir)/libsmtpc.sym
libsmtpc_la_DEPENDENCIES = libsmtpc.sym
libsmtpcdir = $(includedir)/libsmtp_c/smtp_c
libsmtpc_HEADERS = smtp.h
pkgconfigdir = $(libdir)/pkgconfig
dist_pkgconfig_DATA = smtp-c.pc
EXTRA_DIST = libsmtpc.sym

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/*
* Base64 encoding/decoding (RFC1341)
* Copyright (c) 2005-2011, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "base64.h"
static const unsigned char base64_table[65] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/**
* base64_encode - Base64 encode
* @src: Data to be encoded
* @len: Length of the data to be encoded
* @out_len: Pointer to output length variable, or %NULL if not used
* Returns: Allocated buffer of out_len bytes of encoded data,
* or %NULL on failure
*
* Caller is responsible for freeing the returned buffer. Returned buffer is
* nul terminated to make it easier to use as a C string. The nul terminator is
* not included in out_len.
*/
unsigned char * base64_encode(const unsigned char *src, size_t len,
size_t *out_len)
{
unsigned char *out, *pos;
const unsigned char *end, *in;
size_t olen;
int line_len;
olen = len * 4 / 3 + 4; /* 3-byte blocks to 4-byte */
olen += olen / 72; /* line feeds */
olen++; /* nul termination */
if (olen < len)
return NULL; /* integer overflow */
out = (unsigned char *) malloc(sizeof (unsigned char) * olen);
if (out == NULL)
return NULL;
end = src + len;
in = src;
pos = out;
line_len = 0;
while (end - in >= 3) {
*pos++ = base64_table[in[0] >> 2];
*pos++ = base64_table[((in[0] & 0x03) << 4) | (in[1] >> 4)];
*pos++ = base64_table[((in[1] & 0x0f) << 2) | (in[2] >> 6)];
*pos++ = base64_table[in[2] & 0x3f];
in += 3;
line_len += 4;
if (line_len >= 72) {
*pos++ = 0;
line_len = 0;
}
}
if (end - in) {
*pos++ = base64_table[in[0] >> 2];
if (end - in == 1) {
*pos++ = base64_table[(in[0] & 0x03) << 4];
*pos++ = '=';
} else {
*pos++ = base64_table[((in[0] & 0x03) << 4) |
(in[1] >> 4)];
*pos++ = base64_table[(in[1] & 0x0f) << 2];
}
*pos++ = '=';
line_len += 4;
}
if (line_len)
*pos++ = 0;
*pos = '\0';
if (out_len)
*out_len = pos - out;
return out;
}
/**
* base64_decode - Base64 decode
* @src: Data to be decoded
* @len: Length of the data to be decoded
* @out_len: Pointer to output length variable
* Returns: Allocated buffer of out_len bytes of decoded data,
* or %NULL on failure
*
* Caller is responsible for freeing the returned buffer.
*/
unsigned char * base64_decode(const unsigned char *src, size_t len,
size_t *out_len)
{
unsigned char dtable[256], *out, *pos, block[4], tmp;
size_t i, count, olen;
int pad = 0;
memset (dtable, 0x80, 256);
for (i = 0; i < sizeof(base64_table) - 1; i++)
dtable[base64_table[i]] = (unsigned char) i;
dtable['='] = 0;
count = 0;
for (i = 0; i < len; i++) {
if (dtable[src[i]] != 0x80)
count++;
}
if (count == 0 || count % 4)
return NULL;
olen = count / 4 * 3;
pos = out = (unsigned char *) malloc (sizeof (unsigned char) * olen);
if (out == NULL)
return NULL;
count = 0;
for (i = 0; i < len; i++) {
tmp = dtable[src[i]];
if (tmp == 0x80)
continue;
if (src[i] == '=')
pad++;
block[count] = tmp;
count++;
if (count == 4) {
*pos++ = (block[0] << 2) | (block[1] >> 4);
*pos++ = (block[1] << 4) | (block[2] >> 2);
*pos++ = (block[2] << 6) | block[3];
count = 0;
if (pad) {
if (pad == 1)
pos--;
else if (pad == 2)
pos -= 2;
else {
/* Invalid padding */
free(out);
return NULL;
}
break;
}
}
}
*out_len = pos - out;
return out;
}

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#ifndef __BASE64_H__
#define __BASE64_H__
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
unsigned char * base64_encode(const unsigned char *src, size_t len, size_t *out_len);
#endif /* __BASE64_H__ */

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smtp_session_create
smtp_session_auth_login
smtp_session_connect
smtp_session_close_and_clean
smtp_session_send_command
smtp_session_send_close
smtp_session_send_data
smtp_session_continue
smtp_session_get_state
smtp_session_get_poll
smtp_session_get_socket
smtp_session_get_last_code
smtp_session_get_last_message
smtp_session_free
smtp_session_multiline_func

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prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: SMTP-C Library
Description: Client Library for doing async SMTP client commands
Version: @VERSION@
Libs: -L${libdir} -lsmtpc
#Requires.private: openssl >= 0.9.8
Cflags: -I${includedir}/libsmtp_c

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/*
* smtp.c
* This file is part of LibSMTPc
*
* Copyright (C) 2022 - Félix Arreola Rodríguez
*
* LibSMTPc is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* LibSMTPc is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LibSMTPc; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
#include <ctype.h>
#include "smtp.h"
#include "base64.h"
#define SMTP_WANT_FLAGS_OR_POLL(var, flags, poll) \
do { \
if ((var & flags) == 0) { \
poll = flags; \
return SMTP_POLL; \
} \
} while (0)
enum {
SMTP_LINE_INVALID = 0,
SMTP_LINE_CODE,
SMTP_LINE_CONTINUE
};
enum {
SMTP_INTERNAL_FREE = 0,
SMTP_INTERNAL_WRITE,
SMTP_INTERNAL_READ,
};
struct _SMTPSession {
/* El socket de datos */
int sock;
/* Estado de la sessión en general */
int estado;
/* Estado interno, lectura, escritura */
int internal;
/* Variable que controla el poller */
int poll;
/* La conexión con el servidor */
struct sockaddr_storage server;
/* El buffer de lectura de la red */
char read_buffer[8192];
size_t read_count;
int ceof;
/* El último código de 3 digitos del último comando enviado */
int last_code;
/* El ehlo que vamos a utilizar */
char helo_name[300];
/* Utilizado para saber si sigo buscando lineas de continuación de un comando multilineas */
char cont_code[6];
char *user;
char *passwd;
char last_cmd[8192];
char last_message[1024];
/* El stream que usaremos para enviar el correo */
FILE *data_stream;
/* Función para llamar cuando lea entre lineas */
SMTPLineFunc line_func;
void *line_func_data;
};
int _smtp_session_internal_connect_cont (SMTPSession *session);
int _smtp_session_internal_banner_code (SMTPSession *session);
int _smtp_session_internal_send_helo (SMTPSession *session);
int _smtp_session_internal_helo_code (SMTPSession *session);
int _smtp_session_internal_start_auth_login (SMTPSession *session);
int _smtp_session_internal_auth_login_code (SMTPSession *session);
int _smtp_session_internal_send_user (SMTPSession *session);
int _smtp_session_internal_user_code (SMTPSession *session);
int _smtp_session_internal_send_pass (SMTPSession *session);
int _smtp_session_internal_pass_code (SMTPSession *session);
int _smtp_session_internal_send_cmd (SMTPSession *session);
int _smtp_session_internal_cmd_code (SMTPSession *session);
int _smtp_session_internal_send_close (SMTPSession *session);
int _smtp_session_internal_close_code (SMTPSession *session);
int _smtp_session_internal_send_data (SMTPSession *session);
int _smtp_session_internal_data_code (SMTPSession *session);
int _smtp_session_internal_data_write_finish (SMTPSession *session);
int _smtp_session_internal_data_write (SMTPSession *session);
int smtp_session_read_bytes (SMTPSession *session);
int smtp_session_readline (SMTPSession *session, char *buffer, int max);
int _smtp_session_validate_response_line (SMTPSession *session, char *buffer, int size);
SMTPSession *smtp_session_create (void) {
SMTPSession *smtp;
smtp = (SMTPSession *) malloc (sizeof (SMTPSession));
if (smtp == NULL) return NULL;
memset (smtp, 0, sizeof (SMTPSession));
smtp->sock = -1;
return smtp;
}
void smtp_session_free (SMTPSession *session) {
smtp_session_close_and_clean (session);
free (session);
}
void smtp_session_close_and_clean (SMTPSession *session) {
if (session->user != NULL) {
free (session->user);
session->user = NULL;
}
if (session->passwd != NULL) {
free (session->passwd);
session->passwd = NULL;
}
if (session->sock >= 0) {
close (session->sock);
session->sock = -1;
}
session->internal = SMTP_INTERNAL_FREE;
session->estado = SMTP_STATE_CLOSED;
}
int smtp_session_connect (SMTPSession *session, struct sockaddr *server, socklen_t addr_len, const char *helo_name) {
int c;
int res;
session->poll = SMTP_WANT_NONE;
c = socket (server->sa_family, SOCK_STREAM, 0);
if (c < 0) {
return SMTP_ERROR;
}
fcntl (c, F_SETFL, O_NONBLOCK);
session->estado = SMTP_STATE_TRYING_CONNECT;
memcpy (&session->server, server, addr_len);
strncpy (session->helo_name, helo_name, sizeof (session->helo_name));
res = connect (c, server, addr_len);
if (res < 0) {
if (errno == EINPROGRESS) {
session->sock = c;
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
session->estado = SMTP_STATE_TRYING_CONNECT;
return SMTP_POLL;
} else {
session->sock = -1;
close (c);
return SMTP_ERROR;
}
} else {
/* Conexión exitosa */
session->sock = c;
session->internal = SMTP_INTERNAL_READ;
session->estado = SMTP_STATE_BANNER;
session->read_count = 0;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
}
int smtp_session_continue (SMTPSession *session, int what) {
char linea[8192];
size_t linea_size;
int res;
if (session->internal == SMTP_INTERNAL_FREE) {
return SMTP_ERROR;
}
if (session->internal == SMTP_INTERNAL_WRITE) {
SMTP_WANT_FLAGS_OR_POLL (what, SMTP_WANT_POLL_OUT, session->poll);
/* Se logró el evento esperado */
switch (session->estado) {
case SMTP_STATE_TRYING_CONNECT:
return _smtp_session_internal_connect_cont (session);
case SMTP_STATE_HELO:
return _smtp_session_internal_send_helo (session);
case SMTP_STATE_AUTH_LOGIN:
return _smtp_session_internal_start_auth_login (session);
case SMTP_STATE_AUTH_LOGIN_USER:
return _smtp_session_internal_send_user (session);
case SMTP_STATE_AUTH_LOGIN_PASS:
return _smtp_session_internal_send_pass (session);
case SMTP_STATE_CMD:
return _smtp_session_internal_send_cmd (session);
case SMTP_STATE_CLOSING:
return _smtp_session_internal_send_close (session);
case SMTP_STATE_DATA:
return _smtp_session_internal_send_data (session);
case SMTP_STATE_SENDING_DATA:
return _smtp_session_internal_data_write (session);
}
} else if (session->internal == SMTP_INTERNAL_READ) {
SMTP_WANT_FLAGS_OR_POLL (what, SMTP_WANT_POLL_IN, session->poll);
/* Cuando sea una lectura, esperamos una linea con un código de respuesta, el que sea */
smtp_continue_read_line_again:
/* Leer una linea */
linea_size = smtp_session_readline (session, linea, sizeof (linea));
if (linea_size == SMTP_POLL) {
/* Si al intentar leer, no hay linea, revisar si podemos leer algunos bytes */
res = smtp_session_read_bytes (session);
if (res == SMTP_ERROR) {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
} else if (res == SMTP_POLL) {
/* No hay bytes, hacer polling */
session->poll = SMTP_WANT_POLL_IN;
return SMTP_POLL;
} else if (session->ceof == 1) {
/* Cierre de la conexión, limpiar y cerrar */
if (session->estado == SMTP_STATE_CLOSING) {
smtp_session_close_and_clean (session);
return SMTP_SUCCESS;
} else {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
}
/* Con los bytes restantes de la lectura previa, intentar leer la linea */
linea_size = smtp_session_readline (session, linea, sizeof (linea));
}
/* Procesar la linea */
res = _smtp_session_validate_response_line (session, linea, linea_size);
if (res == SMTP_LINE_INVALID) {
/* Esperaba una respuesta numérica */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
} else if (res == SMTP_LINE_CONTINUE) {
/* Llamarnos recursivamente para procesar la siguiente linea */
goto smtp_continue_read_line_again;
}
/* Linea buena, guardar el estado y el mensaje de la linea */
/* Estamos conectados */
strncpy (session->last_message, &linea[4], sizeof (session->last_message) - 1);
session->last_code = ((linea[0] - '0') * 100) + ((linea[1] - '0') * 10) + (linea[2] - '0');
/* Correr la función correcta para pasar al siguiente estado */
switch (session->estado) {
case SMTP_STATE_BANNER:
return _smtp_session_internal_banner_code (session);
case SMTP_STATE_HELO:
return _smtp_session_internal_helo_code (session);
case SMTP_STATE_AUTH_LOGIN:
return _smtp_session_internal_auth_login_code (session);
case SMTP_STATE_AUTH_LOGIN_USER:
return _smtp_session_internal_user_code (session);
case SMTP_STATE_AUTH_LOGIN_PASS:
return _smtp_session_internal_pass_code (session);
case SMTP_STATE_CMD:
return _smtp_session_internal_cmd_code (session);
case SMTP_STATE_CLOSING:
return _smtp_session_internal_close_code (session);
case SMTP_STATE_DATA:
return _smtp_session_internal_data_code (session);
case SMTP_STATE_SENDING_DATA:
return _smtp_session_internal_data_write_finish (session);
}
}
}
int _smtp_session_validate_response_line (SMTPSession *session, char *buffer, int size) {
if (size < 4 && session->cont_code[0] == 0) {
return SMTP_LINE_INVALID;
}
if (session->cont_code[0] != 0) {
/* Estamos leyendo una continuación, si son digitos más espacio, es la linea final */
if (size >= 4 && strncmp (session->cont_code, buffer, 3) == 0 && buffer[3] == ' ') {
session->cont_code[0] = 0; /* Ya no es continuación */
return SMTP_LINE_CODE;
} else {
/* Lo que sea la linea, es continuación de lo anterior */
/* Si el usuario instaló una función de entre lineas, llamarla */
if (session->line_func != NULL) {
session->line_func (session, buffer, session->line_func_data);
}
return SMTP_LINE_CONTINUE;
}
} else {
if (!isdigit (buffer[0]) || !isdigit (buffer[1]) || !isdigit (buffer[2])) {
return SMTP_LINE_INVALID;
}
if (buffer[3] == '-') {
/* Empieza una continuación multi-linea */
session->cont_code[0] = buffer[0];
session->cont_code[1] = buffer[1];
session->cont_code[2] = buffer[2];
session->cont_code[3] = 0;
/* Si el usuario instaló una función de entre lineas, llamarla */
if (session->line_func != NULL) {
session->line_func (session, buffer, session->line_func_data);
}
return SMTP_LINE_CONTINUE;
} else {
return SMTP_LINE_CODE;
}
}
}
int _smtp_session_internal_connect_cont (SMTPSession *session) {
int optval;
socklen_t optlen;
int res;
optval = -1;
optlen = sizeof (optval);
res = getsockopt (session->sock, SOL_SOCKET, SO_ERROR, &optval, &optlen);
if (res < 0) {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* FIXME: Revisar el valor de optval */
/* Pasamos a la lectura del banner */
session->internal = SMTP_INTERNAL_READ;
session->estado = SMTP_STATE_BANNER;
session->read_count = 0;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_banner_code (SMTPSession *session) {
if (session->last_code >= 200 && session->last_code < 300) {
session->internal = SMTP_INTERNAL_WRITE;
session->estado = SMTP_STATE_HELO;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
} else {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
}
int _smtp_session_internal_send_helo (SMTPSession *session) {
char linea[1024];
int res, linea_size;
linea_size = snprintf (linea, sizeof (linea), "EHLO %s\r\n", session->helo_name);
res = write (session->sock, linea, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
/* Enviamos menos de lo que deberíamos o error, TODO: revisar este caso */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Envio completo */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_helo_code (SMTPSession *session) {
if (session->last_code >= 200 && session->last_code < 300) {
session->internal = SMTP_INTERNAL_FREE;
session->estado = SMTP_STATE_READY;
return SMTP_SUCCESS;
} else {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
}
int _smtp_session_internal_start_auth_login (SMTPSession *session) {
int res, linea_size;
char *auth = "AUTH LOGIN\r\n";
linea_size = strlen (auth);
res = write (session->sock, auth, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Empezamos el AUTH LOGIN */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_auth_login_code (SMTPSession *session) {
if (session->last_code >= 300 && session->last_code < 400) {
session->estado = SMTP_STATE_AUTH_LOGIN_USER;
session->internal = SMTP_INTERNAL_WRITE;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
} else if (session->last_code >= 500) {
session->estado = SMTP_STATE_READY;
session->internal = SMTP_INTERNAL_FREE;
return SMTP_ERROR;
} else {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
}
int _smtp_session_internal_send_user (SMTPSession *session) {
char linea[1024];
int res, linea_size;
size_t b64_len;
char *b64;
b64 = base64_encode (session->user, strlen (session->user), &b64_len);
linea_size = snprintf (linea, sizeof (linea), "%s\r\n", b64);
free (b64);
res = write (session->sock, linea, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
/* Enviamos menos de lo que deberíamos o error, TODO: revisar este caso */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Envio completo */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_user_code (SMTPSession *session) {
if (session->last_code >= 300 && session->last_code < 400) {
session->estado = SMTP_STATE_AUTH_LOGIN_PASS;
session->internal = SMTP_INTERNAL_WRITE;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
} else if (session->last_code >= 200 && session->last_code < 300) {
session->internal = SMTP_INTERNAL_FREE;
session->estado = SMTP_STATE_READY;
/* FIXME: activar la bandera de logueado */
if (session->passwd) {
free (session->passwd);
session->passwd = NULL;
}
return SMTP_SUCCESS;
} else {
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
}
int _smtp_session_internal_send_pass (SMTPSession *session) {
char linea[1024];
int res, linea_size;
size_t b64_len;
char *b64;
b64 = base64_encode (session->passwd, strlen (session->passwd), &b64_len);
linea_size = snprintf (linea, sizeof (linea), "%s\r\n", b64);
free (b64);
res = write (session->sock, linea, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
/* Enviamos menos de lo que deberíamos o error, TODO: revisar este caso */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Envio completo */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_pass_code (SMTPSession *session) {
session->estado = SMTP_STATE_READY;
session->internal = SMTP_INTERNAL_FREE;
if (session->last_code >= 200 && session->last_code < 300) {
/* FIXME: activar la bandera de logueado */
return SMTP_SUCCESS;
}
return SMTP_ERROR;
}
int _smtp_session_internal_send_cmd (SMTPSession *session) {
int res, linea_size;
linea_size = strlen (session->last_cmd);
res = write (session->sock, session->last_cmd, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
/* Enviamos menos de lo que deberíamos o error, TODO: revisar este caso */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Envio completo */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_cmd_code (SMTPSession *session) {
session->estado = SMTP_STATE_READY;
session->internal = SMTP_INTERNAL_FREE;
return SMTP_SUCCESS;
}
int _smtp_session_internal_data_write_finish (SMTPSession *session) {
session->estado = SMTP_STATE_READY;
session->internal = SMTP_INTERNAL_FREE;
if (session->last_code >= 200 && session->last_code < 300) {
return SMTP_SUCCESS;
}
return SMTP_ERROR;
}
int _smtp_session_internal_data_write (SMTPSession *session) {
int res;
char buffer[8192];
size_t consumed;
long pos;
if (session->data_stream == NULL) {
/* Si no hay flujo, nada que mandar. Cerrar canal de datos */
/* Pasar a leer el 200 del comando */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
smtp_data_write_again:
/* Primero hacer una lectura del flujo */
pos = ftell (session->data_stream);
consumed = fread (buffer, 1, sizeof (buffer), session->data_stream);
if (consumed == 0) {
//if (feof (session->data_stream) || ferror (session->data_stream)) {
/* Fin de archivo, continuar con los comandos */
session->data_stream = NULL;
/* Pasar a leer el 200 del comando */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
//}
}
/* Tratar de escribir la cantidad leida */
res = send (session->sock, buffer, consumed, 0);
if (res > 0) {
/* Reajustar el flujo de entrada */
pos = pos + res;
fseek (session->data_stream, pos, SEEK_SET);
/* Reintentar enviar datos */
goto smtp_data_write_again;
} else if (res <= 0) {
if (errno == EAGAIN || errno == EINTR) {
/* Bloquearía, reintentar después */
fseek (session->data_stream, pos, SEEK_SET);
session->poll = SMTP_WANT_POLL_OUT;
return SMTP_POLL;
}
/* En otro error, se cerró la conexión de datos */
session->data_stream = NULL;
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
}
int _smtp_session_internal_send_close (SMTPSession *session) {
char *linea;
int res, linea_size;
linea = "QUIT\r\n";
linea_size = strlen (linea);
res = write (session->sock, linea, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
/* Enviamos menos de lo que deberíamos o error, TODO: revisar este caso */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Envio completo */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_close_code (SMTPSession *session) {
if (session->last_code >= 200 && session->last_code < 300) {
session->internal = SMTP_INTERNAL_FREE;
/* Intencionalmente no cambiamos de estado para que nos llegue el cierre */
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
} else {
smtp_session_close_and_clean (session);
}
return SMTP_SUCCESS;
}
int _smtp_session_internal_send_data (SMTPSession *session) {
char *linea;
int res, linea_size;
linea = "DATA\r\n";
linea_size = strlen (linea);
res = write (session->sock, linea, linea_size);
if (res < 0 && errno == EAGAIN) {
session->poll = SMTP_WANT_POLL_OUT;
session->internal = SMTP_INTERNAL_WRITE;
return SMTP_POLL;
} else if (res < linea_size) {
/* Enviamos menos de lo que deberíamos o error, TODO: revisar este caso */
smtp_session_close_and_clean (session);
return SMTP_ERROR;
}
/* Envio completo */
session->internal = SMTP_INTERNAL_READ;
return smtp_session_continue (session, SMTP_WANT_POLL_IN);
}
int _smtp_session_internal_data_code (SMTPSession *session) {
int c;
int res;
if (session->last_code >= 300 && session->last_code < 400) {
/* Avanzamos de estado */
session->internal = SMTP_INTERNAL_WRITE;
session->estado = SMTP_STATE_SENDING_DATA;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
} else {
/* En el caso de un código de error, regresar */
session->internal = SMTP_INTERNAL_FREE;
session->estado = SMTP_STATE_READY;
return SMTP_ERROR;
}
}
int smtp_session_read_bytes (SMTPSession *session) {
int res;
if (session->read_count >= sizeof (session->read_buffer)) {
return SMTP_ERROR;
}
/* Leer tantos bytes como tenga el buffer */
res = read (session->sock, &session->read_buffer[session->read_count], sizeof (session->read_buffer) - session->read_count);
if (res == 0) {
session->ceof = 1;
} else if (res < 0) {
if (errno == EINTR || errno == EAGAIN) {
return SMTP_POLL;
}
return SMTP_ERROR;
} else {
session->read_count += res;
}
return SMTP_SUCCESS;
}
int smtp_session_readline (SMTPSession *session, char *buffer, int max) {
char *end;
int line_size = 0;
if (session->read_count > 0) {
/* Ya había otros bytes en el buffer, procesarlos para buscar el salto de linea aquí */
line_size = (max >= session->read_count) ? session->read_count : max - 1;
end = memccpy (buffer, session->read_buffer, '\n', line_size);
if (end != NULL) {
line_size = end - buffer;
}
buffer[line_size] = 0;
/* Consumir x bytes de la entrada */
if (line_size < session->read_count) {
memmove (session->read_buffer, &session->read_buffer[line_size], session->read_count - line_size);
session->read_count -= line_size;
} else {
session->read_buffer[0] = 0;
session->read_count = 0;
}
if (end != NULL) {
if (buffer[line_size - 2] == '\r') {
/* Quitar el \r */
buffer[line_size - 2] = '\n';
buffer[line_size - 1] = 0;
line_size--;
}
return line_size;
}
}
return SMTP_POLL;
}
int smtp_session_get_state (SMTPSession *session) {
return session->estado;
}
int smtp_session_auth_login (SMTPSession *session, const char *user, const char *passwd) {
if (session->estado != SMTP_STATE_READY || session->internal != SMTP_INTERNAL_FREE) {
return SMTP_ERROR;
}
/* Copiar el usuario y contraseña */
session->user = strdup (user);
if (passwd != NULL) {
session->passwd = strdup (passwd);
} else {
session->passwd = NULL;
}
session->estado = SMTP_STATE_AUTH_LOGIN;
session->internal = SMTP_INTERNAL_WRITE;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
}
int smtp_session_send_command (SMTPSession *session, char *command) {
int len;
/* TODO: Revisar aquí otros estados */
if (session->estado != SMTP_STATE_READY || session->internal != SMTP_INTERNAL_FREE) {
return SMTP_ERROR;
}
/* Sanitizar el comando y asegurarnos que contenga el \r\n */
len = strlen (command);
if (command[len - 2] == '\r' && command[len - 1] == '\n') {
if (len + 1 > sizeof (session->last_cmd)) {
return SMTP_ERROR;
}
strncpy (session->last_cmd, command, sizeof (session->last_cmd));
} else if (command[len - 1] == '\r') {
if (len + 2 > sizeof (session->last_cmd)) {
return SMTP_ERROR;
}
strncpy (session->last_cmd, command, sizeof (session->last_cmd));
session->last_cmd[len] = '\n';
session->last_cmd[len + 1] = 0;
} else {
if (len + 3 > sizeof (session->last_cmd)) {
return SMTP_ERROR;
}
strncpy (session->last_cmd, command, sizeof (session->last_cmd));
session->last_cmd[len] = '\r';
session->last_cmd[len + 1] = '\n';
session->last_cmd[len + 2] = 0;
}
session->estado = SMTP_STATE_CMD;
session->internal = SMTP_INTERNAL_WRITE;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
}
int smtp_session_send_close (SMTPSession *session) {
char *command;
int len;
if (session->estado != SMTP_STATE_READY || session->internal != SMTP_INTERNAL_FREE) {
return SMTP_ERROR;
}
session->estado = SMTP_STATE_CLOSING;
session->internal = SMTP_INTERNAL_WRITE;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
}
int smtp_session_send_data (SMTPSession *session, FILE *stream) {
char *command;
int len;
if (session->estado != SMTP_STATE_READY || session->internal != SMTP_INTERNAL_FREE) {
return SMTP_ERROR;
}
session->estado = SMTP_STATE_DATA;
session->internal = SMTP_INTERNAL_WRITE;
session->data_stream = stream;
return smtp_session_continue (session, SMTP_WANT_POLL_OUT);
}
int smtp_session_get_socket (SMTPSession *session) {
return session->sock;
}
int smtp_session_get_last_code (SMTPSession *session) {
return session->last_code;
}
char * smtp_session_get_last_message (SMTPSession *session) {
return session->last_message;
}
void smtp_session_multiline_func (SMTPSession *session, SMTPLineFunc func, void *data) {
session->line_func = func;
session->line_func_data = data;
}
int smtp_session_get_poll (SMTPSession *session) {
return session->poll;
}

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src/smtp.h 100644
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@ -0,0 +1,81 @@
/*
* smtp.h
* This file is part of LibSMTPc
*
* Copyright (C) 2022 - Félix Arreola Rodríguez
*
* LibSMTPc is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* LibSMTPc is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LibSMTPc; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#ifndef __SMTP_H__
#define __SMTP_H__
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#define SMTP_WANT_NONE 0x000
#define SMTP_WANT_POLL_IN 0x001
#define SMTP_WANT_POLL_OUT 0x002
enum {
SMTP_ERROR = -1,
SMTP_POLL = 0,
SMTP_SUCCESS = 1
};
enum {
SMTP_STATE_CLOSED = 0,
SMTP_STATE_TRYING_CONNECT,
SMTP_STATE_BANNER,
SMTP_STATE_HELO,
SMTP_STATE_READY,
SMTP_STATE_AUTH_LOGIN,
SMTP_STATE_AUTH_LOGIN_USER,
SMTP_STATE_AUTH_LOGIN_PASS,
SMTP_STATE_CMD,
SMTP_STATE_DATA,
SMTP_STATE_SENDING_DATA,
SMTP_STATE_CLOSING,
};
typedef struct _SMTPSession SMTPSession;
typedef void (*SMTPLineFunc) (SMTPSession *session, const char *line, void *data);
SMTPSession *smtp_session_create (void);
int smtp_session_auth_login (SMTPSession *session, const char *user, const char *passwd);
int smtp_session_connect (SMTPSession *session, struct sockaddr *server, socklen_t addr_len, const char *helo_name);
void smtp_session_close_and_clean (SMTPSession *session);
int smtp_session_send_command (SMTPSession *session, char *command);
int smtp_session_send_close (SMTPSession *session);
int smtp_session_send_data (SMTPSession *session, FILE *stream);
int smtp_session_continue (SMTPSession *session, int what);
int smtp_session_get_state (SMTPSession *session);
int smtp_session_get_poll (SMTPSession *session);
int smtp_session_get_socket (SMTPSession *session);
int smtp_session_get_last_code (SMTPSession *session);
char * smtp_session_get_last_message (SMTPSession *session);
void smtp_session_free (SMTPSession *session);
void smtp_session_multiline_func (SMTPSession *session, SMTPLineFunc func, void *data);
#endif /* __SMTP_H__ */