/mandos/trunk : revision 13

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/* -*- coding: utf-8 -*- */

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/*

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* Mandos client - get and decrypt data from a Mandos server

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/* $Id$ */

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/* PLEASE NOTE *

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* This file demonstrates how to use Avahi's core API, this is

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* the embeddable mDNS stack for embedded applications.

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*

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* This program is partly derived from an example program for an Avahi

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* service browser, downloaded from

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* <http://avahi.org/browser/examples/core-browse-services.c>. This

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* includes the following functions: "resolve_callback",

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* "browse_callback", and parts of "main".

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*

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* Påhlsson.

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*

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* This program is free software: you can redistribute it and/or

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* modify it under the terms of the GNU General Public License as

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* published by the Free Software Foundation, either version 3 of the

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* License, or (at your option) any later version.

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*

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* This program is distributed in the hope that it will be useful, but

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* WITHOUT ANY WARRANTY; without even the implied warranty of

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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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* General Public License for more details.

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*

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* You should have received a copy of the GNU General Public License

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* along with this program. If not, see

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* <http://www.gnu.org/licenses/>.

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*

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* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and

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* <https://www.fukt.bsnet.se/~teddy/>.

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* End user applications should *not* use this API and should use

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* the D-Bus or C APIs, please see

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* client-browse-services.c and glib-integration.c

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*

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* I repeat, you probably do *not* want to use this example.

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*/

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#define _FORTIFY_SOURCE 2

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/***

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This file is part of avahi.

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avahi is free software; you can redistribute it and/or modify it

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under the terms of the GNU Lesser General Public License as

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published by the Free Software Foundation; either version 2.1 of the

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License, or (at your option) any later version.

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avahi is distributed in the hope that it will be useful, but WITHOUT

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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General

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Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with avahi; if not, write to the Free Software

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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307

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USA.

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***/

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#define _LARGEFILE_SOURCE

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#define _FILE_OFFSET_BITS 64

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#include <avahi-common/error.h>

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//mandos client part

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#include <sys/types.h> /* socket(), inet_pton() */

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#include <sys/socket.h> /* socket(), struct sockaddr_in6,

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struct in6_addr, inet_pton() */

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#include <gnutls/gnutls.h> /* All GnuTLS stuff */

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#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */

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#include <sys/types.h> /* socket(), setsockopt(), inet_pton() */

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#include <sys/socket.h> /* socket(), setsockopt(), struct sockaddr_in6, struct in6_addr, inet_pton() */

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#include <gnutls/gnutls.h> /* ALL GNUTLS STUFF */

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#include <gnutls/openpgp.h> /* gnutls with openpgp stuff */

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#include <unistd.h> /* close() */

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#include <netinet/in.h>

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#include <errno.h> /* perror() */

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#include <gpgme.h>

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// getopt long

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#include <getopt.h>

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#ifndef CERT_ROOT

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#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"

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#define BUFFER_SIZE 256

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#define DH_BITS 1024

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bool debug = false;

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typedef struct {

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gnutls_session_t session;

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gnutls_certificate_credentials_t cred;

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} encrypted_session;

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ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,

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char **new_packet, const char *homedir){

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ssize_t gpg_packet_decrypt (char *packet, size_t packet_size, char **new_packet, char *homedir){

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gpgme_data_t dh_crypto, dh_plain;

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gpgme_ctx_t ctx;

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gpgme_error_t rc;

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ssize_t ret;

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ssize_t new_packet_capacity = 0;

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ssize_t new_packet_length = 0;

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size_t new_packet_capacity = 0;

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size_t new_packet_length = 0;

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gpgme_engine_info_t engine_info;

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if (debug){

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fprintf(stderr, "Trying to decrypt OpenPGP packet\n");

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}

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/* Init GPGME */

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gpgme_check_version(NULL);

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gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

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return -1;

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}

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/* Decrypt data from the FILE pointer to the plaintext data

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buffer */

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/* Decrypt data from the FILE pointer to the plaintext data buffer */

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rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return -1;

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}

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if(debug){

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fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");

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}

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if (debug){

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gpgme_decrypt_result_t result;

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result = gpgme_op_decrypt_result(ctx);

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if (result == NULL){

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fprintf(stderr, "gpgme_op_decrypt_result failed\n");

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} else {

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fprintf(stderr, "Unsupported algorithm: %s\n",

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result->unsupported_algorithm);

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fprintf(stderr, "Wrong key usage: %d\n",

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result->wrong_key_usage);

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if(result->file_name != NULL){

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fprintf(stderr, "File name: %s\n", result->file_name);

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}

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gpgme_recipient_t recipient;

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recipient = result->recipients;

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if(recipient){

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while(recipient != NULL){

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fprintf(stderr, "Public key algorithm: %s\n",

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gpgme_pubkey_algo_name(recipient->pubkey_algo));

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fprintf(stderr, "Key ID: %s\n", recipient->keyid);

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fprintf(stderr, "Secret key available: %s\n",

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recipient->status == GPG_ERR_NO_SECKEY

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? "No" : "Yes");

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recipient = recipient->next;

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}

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}

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}

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}

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/* gpgme_decrypt_result_t result; */

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/* result = gpgme_op_decrypt_result(ctx); */

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/* fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm); */

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/* fprintf(stderr, "Wrong key usage: %d\n", result->wrong_key_usage); */

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/* if(result->file_name != NULL){ */

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/* fprintf(stderr, "File name: %s\n", result->file_name); */

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/* } */

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/* gpgme_recipient_t recipient; */

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/* recipient = result->recipients; */

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/* if(recipient){ */

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/* while(recipient != NULL){ */

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/* fprintf(stderr, "Public key algorithm: %s\n", */

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/* gpgme_pubkey_algo_name(recipient->pubkey_algo)); */

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/* fprintf(stderr, "Key ID: %s\n", recipient->keyid); */

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/* fprintf(stderr, "Secret key available: %s\n", */

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/* recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes"); */

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/* recipient = recipient->next; */

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/* } */

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/* } */

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/* Delete the GPGME FILE pointer cryptotext data buffer */

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gpgme_data_release(dh_crypto);

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/* Seek back to the beginning of the GPGME plaintext data buffer */

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gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET);

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gpgme_data_seek(dh_plain, 0, SEEK_SET);

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*new_packet = 0;

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while(true){

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if (new_packet_length + BUFFER_SIZE > new_packet_capacity){

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*new_packet = realloc(*new_packet,

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(unsigned int)new_packet_capacity

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+ BUFFER_SIZE);

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*new_packet = realloc(*new_packet, new_packet_capacity + BUFFER_SIZE);

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if (*new_packet == NULL){

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perror("realloc");

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return -1;

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new_packet_capacity += BUFFER_SIZE;

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}

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ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,

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BUFFER_SIZE);

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ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length, BUFFER_SIZE);

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/* Print the data, if any */

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if (ret == 0){

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/* If password is empty, then a incorrect error will be printed */

215

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break;

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}

217

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if(ret < 0){

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new_packet_length += ret;

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}

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/* FIXME: check characters before printing to screen so to not print

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terminal control characters */

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/* if(debug){ */

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/* fprintf(stderr, "decrypted password is: "); */

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/* fwrite(*new_packet, 1, new_packet_length, stderr); */

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/* fprintf(stderr, "\n"); */

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/* } */

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/* Delete the GPGME plaintext data buffer */

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/* Delete the GPGME plaintext data buffer */

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gpgme_data_release(dh_plain);

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return new_packet_length;

235

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}

241

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return ret;

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}

243

208

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void debuggnutls(__attribute__((unused)) int level,

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const char* string){

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void debuggnutls(int level, const char* string){

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fprintf(stderr, "%s", string);

247

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}

248

212

250

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const char *err;

251

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int ret;

252

216

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if(debug){

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fprintf(stderr, "Initializing GnuTLS\n");

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}

256

257

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if ((ret = gnutls_global_init ())

258

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!= GNUTLS_E_SUCCESS) {

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fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));

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return -1;

261

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}

262

222

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if (debug){

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gnutls_global_set_log_level(11);

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gnutls_global_set_log_function(debuggnutls);

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}

267

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/* Uncomment to enable full debuggin on the gnutls library */

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/* gnutls_global_set_log_level(11); */

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/* gnutls_global_set_log_function(debuggnutls); */

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/* openpgp credentials */

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if ((ret = gnutls_certificate_allocate_credentials (&es->cred))

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!= GNUTLS_E_SUCCESS) {

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fprintf (stderr, "memory error: %s\n",

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safer_gnutls_strerror(ret));

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fprintf (stderr, "memory error: %s\n", safer_gnutls_strerror(ret));

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return -1;

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}

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if(debug){

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fprintf(stderr, "Attempting to use OpenPGP certificate %s"

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" and keyfile %s as GnuTLS credentials\n", CERTFILE,

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KEYFILE);

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}

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ret = gnutls_certificate_set_openpgp_key_file

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(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);

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if (ret != GNUTLS_E_SUCCESS) {

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fprintf

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(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"

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" '%s')\n",

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(stderr, "Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",

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ret, CERTFILE, KEYFILE);

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fprintf(stdout, "The Error is: %s\n",

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safer_gnutls_strerror(ret));

291

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return -1;

292

244

}

293

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//GnuTLS server initialization

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//Gnutls server initialization

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if ((ret = gnutls_dh_params_init (&es->dh_params))

296

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!= GNUTLS_E_SUCCESS) {

297

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fprintf (stderr, "Error in dh parameter initialization: %s\n",

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safer_gnutls_strerror(ret));

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return -1;

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}

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302

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if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))

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!= GNUTLS_E_SUCCESS) {

304

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fprintf (stderr, "Error in prime generation: %s\n",

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safer_gnutls_strerror(ret));

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return -1;

307

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}

308

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309

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gnutls_certificate_set_dh_params (es->cred, es->dh_params);

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// GnuTLS session creation

262

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// Gnutls session creation

312

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if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))

313

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!= GNUTLS_E_SUCCESS){

314

fprintf(stderr, "Error in GnuTLS session initialization: %s\n",

266

fprintf(stderr, "Error in gnutls session initialization: %s\n",

315

267

safer_gnutls_strerror(ret));

316

268

}

317

269

318

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if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))

319

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!= GNUTLS_E_SUCCESS) {

320

272

fprintf(stderr, "Syntax error at: %s\n", err);

321

fprintf(stderr, "GnuTLS error: %s\n",

273

fprintf(stderr, "Gnutls error: %s\n",

322

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safer_gnutls_strerror(ret));

323

275

return -1;

324

276

}

325

277

326

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if ((ret = gnutls_credentials_set

327

279

(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))

328

280

!= GNUTLS_E_SUCCESS) {

330

282

safer_gnutls_strerror(ret));

331

283

return -1;

332

284

}

333

285

334

286

/* ignore client certificate if any. */

335

gnutls_certificate_server_set_request (es->session,

336

GNUTLS_CERT_IGNORE);

287

gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);

337

288

338

289

gnutls_dh_set_prime_bits (es->session, DH_BITS);

339

290

340

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return 0;

341

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}

342

293

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void empty_log(__attribute__((unused)) AvahiLogLevel level,

344

__attribute__((unused)) const char *txt){}

294

void empty_log(AvahiLogLevel level, const char *txt){}

345

295

346

int start_mandos_communication(const char *ip, uint16_t port,

347

unsigned int if_index){

296

int start_mandos_communcation(char *ip, uint16_t port){

348

297

int ret, tcp_sd;

349

298

struct sockaddr_in6 to;

299

struct in6_addr ip_addr;

350

300

encrypted_session es;

351

301

char *buffer = NULL;

352

302

char *decrypted_buffer;

353

303

size_t buffer_length = 0;

354

304

size_t buffer_capacity = 0;

355

305

ssize_t decrypted_buffer_size;

356

size_t written = 0;

357

306

int retval = 0;

358

char interface[IF_NAMESIZE];

359

360

if(debug){

361

fprintf(stderr, "Setting up a tcp connection to %s\n", ip);

362

}

307

363

308

364

309

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

365

310

if(tcp_sd < 0) {

367

312

return -1;

368

313

}

369

314

370

if(if_indextoname(if_index, interface) == NULL){

371

if(debug){

372

perror("if_indextoname");

373

}

315

ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, "eth0", 5);

316

if(tcp_sd < 0) {

317

perror("setsockopt bindtodevice");

374

318

return -1;

375

319

}

376

320

377

if(debug){

378

fprintf(stderr, "Binding to interface %s\n", interface);

379

}

380

381

memset(&to,0,sizeof(to)); /* Spurious warning */

321

memset(&to,0,sizeof(to));

382

322

to.sin6_family = AF_INET6;

383

ret = inet_pton(AF_INET6, ip, &to.sin6_addr);

323

ret = inet_pton(AF_INET6, ip, &ip_addr);

384

324

if (ret < 0 ){

385

325

perror("inet_pton");

386

326

return -1;

389

329

fprintf(stderr, "Bad address: %s\n", ip);

390

330

return -1;

391

331

}

392

to.sin6_port = htons(port); /* Spurious warning */

393

394

to.sin6_scope_id = (uint32_t)if_index;

395

396

if(debug){

397

fprintf(stderr, "Connection to: %s\n", ip);

398

}

332

to.sin6_port = htons(port);

333

to.sin6_scope_id = if_nametoindex("eth0");

399

334

400

335

ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));

401

336

if (ret < 0){

408

343

retval = -1;

409

344

return -1;

410

345

}

411

412

gnutls_transport_set_ptr (es.session,

413

(gnutls_transport_ptr_t) tcp_sd);

414

415

if(debug){

416

fprintf(stderr, "Establishing TLS session with %s\n", ip);

417

}

418

346

347

348

gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);

349

419

350

ret = gnutls_handshake (es.session);

420

351

421

352

if (ret != GNUTLS_E_SUCCESS){

422

if(debug){

423

fprintf(stderr, "\n*** Handshake failed ***\n");

424

gnutls_perror (ret);

425

}

353

fprintf(stderr, "\n*** Handshake failed ***\n");

354

gnutls_perror (ret);

426

355

retval = -1;

427

356

goto exit;

428

357

}

429

430

//Retrieve OpenPGP packet that contains the wanted password

431

432

if(debug){

433

fprintf(stderr, "Retrieving pgp encrypted password from %s\n",

434

ip);

435

}

436

358

359

//retrive password

437

360

while(true){

438

361

if (buffer_length + BUFFER_SIZE > buffer_capacity){

439

362

buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);

464

387

}

465

388

break;

466

389

default:

467

fprintf(stderr, "Unknown error while reading data from"

468

" encrypted session with mandos server\n");

390

fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");

469

391

retval = -1;

470

392

gnutls_bye (es.session, GNUTLS_SHUT_RDWR);

471

393

goto exit;

472

394

}

473

395

} else {

474

buffer_length += (size_t) ret;

396

buffer_length += ret;

475

397

}

476

398

}

477

399

478

400

if (buffer_length > 0){

479

decrypted_buffer_size = pgp_packet_decrypt(buffer,

480

buffer_length,

481

&decrypted_buffer,

482

CERT_ROOT);

483

if (decrypted_buffer_size >= 0){

484

while(written < decrypted_buffer_size){

485

ret = (int)fwrite (decrypted_buffer + written, 1,

486

(size_t)decrypted_buffer_size - written,

487

stdout);

488

if(ret == 0 and ferror(stdout)){

489

if(debug){

490

fprintf(stderr, "Error writing encrypted data: %s\n",

491

strerror(errno));

492

}

493

retval = -1;

494

break;

495

}

496

written += (size_t)ret;

497

}

401

if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) == 0){

402

retval = -1;

403

} else {

404

fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);

498

405

free(decrypted_buffer);

499

} else {

500

retval = -1;

501

406

}

502

407

}

503

408

409

free(buffer);

410

504

411

//shutdown procedure

505

506

if(debug){

507

fprintf(stderr, "Closing TLS session\n");

508

}

509

510

free(buffer);

511

412

gnutls_bye (es.session, GNUTLS_SHUT_RDWR);

512

413

exit:

513

414

close(tcp_sd);

522

423

523

424

static void resolve_callback(

524

425

AvahiSServiceResolver *r,

525

AvahiIfIndex interface,

426

AVAHI_GCC_UNUSED AvahiIfIndex interface,

526

427

AVAHI_GCC_UNUSED AvahiProtocol protocol,

527

428

AvahiResolverEvent event,

528

429

const char *name,

531

432

const char *host_name,

532

433

const AvahiAddress *address,

533

434

uint16_t port,

534

AVAHI_GCC_UNUSED AvahiStringList *txt,

535

AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,

435

AvahiStringList *txt,

436

AvahiLookupResultFlags flags,

536

437

AVAHI_GCC_UNUSED void* userdata) {

537

438

538

assert(r); /* Spurious warning */

539

540

/* Called whenever a service has been resolved successfully or

541

timed out */

542

543

switch (event) {

544

default:

545

case AVAHI_RESOLVER_FAILURE:

546

fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"

547

" type '%s' in domain '%s': %s\n", name, type, domain,

548

avahi_strerror(avahi_server_errno(server)));

549

break;

550

551

case AVAHI_RESOLVER_FOUND:

552

{

553

char ip[AVAHI_ADDRESS_STR_MAX];

554

avahi_address_snprint(ip, sizeof(ip), address);

555

if(debug){

556

fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"

557

" port %d\n", name, host_name, ip, port);

558

}

559

int ret = start_mandos_communication(ip, port,

560

(unsigned int) interface);

561

if (ret == 0){

562

exit(EXIT_SUCCESS);

563

}

439

assert(r);

440

441

/* Called whenever a service has been resolved successfully or timed out */

442

443

switch (event) {

444

case AVAHI_RESOLVER_FAILURE:

445

fprintf(stderr, "(Resolver) Failed to resolve service '%s' of type '%s' in domain '%s': %s\n", name, type, domain, avahi_strerror(avahi_server_errno(server)));

446

break;

447

448

case AVAHI_RESOLVER_FOUND: {

449

char ip[AVAHI_ADDRESS_STR_MAX];

450

avahi_address_snprint(ip, sizeof(ip), address);

451

int ret = start_mandos_communcation(ip, port);

452

if (ret == 0){

453

exit(EXIT_SUCCESS);

454

} else {

455

exit(EXIT_FAILURE);

456

}

457

}

564

458

}

565

}

566

avahi_s_service_resolver_free(r);

459

avahi_s_service_resolver_free(r);

567

460

}

568

461

569

462

static void browse_callback(

578

471

void* userdata) {

579

472

580

473

AvahiServer *s = userdata;

581

assert(b); /* Spurious warning */

582

583

/* Called whenever a new services becomes available on the LAN or

584

is removed from the LAN */

585

474

assert(b);

475

476

/* Called whenever a new services becomes available on the LAN or is removed from the LAN */

477

586

478

switch (event) {

587

default:

588

case AVAHI_BROWSER_FAILURE:

589

590

fprintf(stderr, "(Browser) %s\n",

591

avahi_strerror(avahi_server_errno(server)));

592

avahi_simple_poll_quit(simple_poll);

593

return;

594

595

case AVAHI_BROWSER_NEW:

596

/* We ignore the returned resolver object. In the callback

597

function we free it. If the server is terminated before

598

the callback function is called the server will free

599

the resolver for us. */

600

601

if (!(avahi_s_service_resolver_new(s, interface, protocol, name,

602

type, domain,

603

AVAHI_PROTO_INET6, 0,

604

resolve_callback, s)))

605

fprintf(stderr, "Failed to resolve service '%s': %s\n", name,

606

avahi_strerror(avahi_server_errno(s)));

607

break;

608

609

case AVAHI_BROWSER_REMOVE:

610

break;

611

612

case AVAHI_BROWSER_ALL_FOR_NOW:

613

case AVAHI_BROWSER_CACHE_EXHAUSTED:

614

break;

479

480

case AVAHI_BROWSER_FAILURE:

481

482

fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));

483

avahi_simple_poll_quit(simple_poll);

484

return;

485

486

case AVAHI_BROWSER_NEW:

487

/* We ignore the returned resolver object. In the callback

488

function we free it. If the server is terminated before

489

the callback function is called the server will free

490

the resolver for us. */

491

492

if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))

493

fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));

494

495

break;

496

497

case AVAHI_BROWSER_REMOVE:

498

break;

499

500

case AVAHI_BROWSER_ALL_FOR_NOW:

501

case AVAHI_BROWSER_CACHE_EXHAUSTED:

502

break;

615

503

}

616

504

}

617

505

619

507

AvahiServerConfig config;

620

508

AvahiSServiceBrowser *sb = NULL;

621

509

int error;

622

int ret;

623

int returncode = EXIT_SUCCESS;

624

const char *interface = "eth0";

625

626

while (true){

627

static struct option long_options[] = {

628

{"debug", no_argument, (int *)&debug, 1},

629

{"interface", required_argument, 0, 'i'},

630

{0, 0, 0, 0} };

631

632

int option_index = 0;

633

ret = getopt_long (argc, argv, "i:", long_options,

634

&option_index);

635

636

if (ret == -1){

637

break;

638

}

639

640

switch(ret){

641

case 0:

642

break;

643

case 'i':

644

interface = optarg;

645

break;

646

default:

647

exit(EXIT_FAILURE);

648

}

649

}

650

651

if (not debug){

652

avahi_set_log_function(empty_log);

653

}

510

int ret = 1;

511

512

avahi_set_log_function(empty_log);

654

513

655

514

/* Initialize the psuedo-RNG */

656

srand((unsigned int) time(NULL));

515

srand(time(NULL));

657

516

658

517

/* Allocate main loop object */

659

518

if (!(simple_poll = avahi_simple_poll_new())) {

660

519

fprintf(stderr, "Failed to create simple poll object.\n");

661

662

goto exit;

520

goto fail;

663

521

}

664

522

665

523

/* Do not publish any local records */

669

527

config.publish_workstation = 0;

670

528

config.publish_domain = 0;

671

529

530

/* /\* Set a unicast DNS server for wide area DNS-SD *\/ */

531

/* avahi_address_parse("193.11.177.11", AVAHI_PROTO_UNSPEC, &config.wide_area_servers[0]); */

532

/* config.n_wide_area_servers = 1; */

533

/* config.enable_wide_area = 1; */

534

672

535

/* Allocate a new server */

673

server = avahi_server_new(avahi_simple_poll_get(simple_poll),

674

&config, NULL, NULL, &error);

536

server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);

675

537

676

538

/* Free the configuration data */

677

539

avahi_server_config_free(&config);

678

540

679

/* Check if creating the server object succeeded */

541

/* Check wether creating the server object succeeded */

680

542

if (!server) {

681

fprintf(stderr, "Failed to create server: %s\n",

682

avahi_strerror(error));

683

returncode = EXIT_FAILURE;

684

goto exit;

543

fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));

544

goto fail;

685

545

}

686

546

687

547

/* Create the service browser */

688

sb = avahi_s_service_browser_new(server,

689

(AvahiIfIndex)

690

if_nametoindex(interface),

691

AVAHI_PROTO_INET6,

692

"_mandos._tcp", NULL, 0,

693

browse_callback, server);

694

if (!sb) {

695

fprintf(stderr, "Failed to create service browser: %s\n",

696

avahi_strerror(avahi_server_errno(server)));

697

returncode = EXIT_FAILURE;

698

goto exit;

548

if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {

549

fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));

550

goto fail;

699

551

}

700

552

701

553

/* Run the main loop */

702

703

if (debug){

704

fprintf(stderr, "Starting avahi loop search\n");

705

}

706

707

554

avahi_simple_poll_loop(simple_poll);

708

555

709

exit:

710

711

if (debug){

712

fprintf(stderr, "%s exiting\n", argv[0]);

713

}

556

ret = 0;

557

558

fail:

714

559

715

560

/* Cleanup things */

716

561

if (sb)

722

567

if (simple_poll)

723

568

avahi_simple_poll_free(simple_poll);

724

569

725

return returncode;

570

return ret;

726

571

}