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Viewing changes to plugin-helpers/mandos-client-iprouteadddel.c

  • Committer: Teddy Hogeborn
  • Date: 2024-11-17 18:43:11 UTC
  • Revision ID: teddy@recompile.se-20241117184311-ox25kvngy62h209g
Debian package: Avoid suggesting a C compiler unnecessarily

The list of suggested packages, meant to enable the "mandos" program
to find the correct value of SO_BINDTODEVICE by using a C compiler,
are not necessary when Python 3.3 or later is used, since it has the
SO_BINDTODEVICE constant defined in the "socket" module.  Also, Python
2.6 or older has the same constant in the old "IN" module.  Therefore,
we should suggest these Python versions as alternatives to a C
compiler, so that a C compiler is not installed unnecessarily.

debian/control (Package: mandos/Suggests): Add "python3 (>= 3.3)" and
"python (<= 2.6)" as alternatives to "libc6-dev | libc-dev" and
"c-compiler".

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plugin-helpers/mandos-client-iprouteadddel.c
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/* 
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 * iprouteadddel - Add or delete direct route to a local IP address
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 * 
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 * Copyright © 2015-2016 Teddy Hogeborn
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 * Copyright © 2015-2016 Björn 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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 * Copyright © 2015-2018, 2021-2022 Teddy Hogeborn
 
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 * Copyright © 2015-2018, 2021-2022 Björn Påhlsson
 
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 * 
 
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 * This file is part of Mandos.
 
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 * 
 
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 * Mandos is free software: you can redistribute it and/or modify it
 
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 * under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation, either version 3 of the License, or
 
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 * (at your option) any later version.
 
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 * 
 
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 * Mandos 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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 * along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
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 * 
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 * Contact the authors at <mandos@recompile.se>.
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 */
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#define _GNU_SOURCE             /* asprintf(),
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                                   program_invocation_short_name */
 
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#define _GNU_SOURCE             /* program_invocation_short_name */
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#include <stdbool.h>            /* bool, false, true */
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#include <stdio.h>              /* fprintf(), stderr, FILE, vfprintf */
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#include <errno.h>              /* program_invocation_short_name,
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                                   errno, perror(), EINVAL, ENOMEM */
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#include <stdarg.h>             /* va_list, va_start */
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#include <stdlib.h>             /* EXIT_SUCCESS */
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#include <argp.h>               /* struct argp_option, error_t, struct
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                                   argp_state, ARGP_KEY_ARG,
 
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#include <argp.h>               /* argp_program_version,
 
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                                   argp_program_bug_address,
 
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                                   struct argp_option,
 
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                                   struct argp_state, ARGP_KEY_ARG,
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                                   argp_usage(), ARGP_KEY_END,
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                                   ARGP_ERR_UNKNOWN, struct argp,
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                                   argp_parse() */
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#include <sysexits.h>           /* EX_USAGE, EX_OSERR */
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#include <netinet/ip.h>         /* sa_family_t, AF_INET6, AF_INET */
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#include <inttypes.h>           /* PRIdMAX, intmax_t */
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                                   argp_parse(), ARGP_IN_ORDER */
 
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#include <errno.h>              /* errno,
 
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                                   program_invocation_short_name,
 
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                                   error_t, EINVAL, ENOMEM */
 
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#include <stdio.h>              /* fprintf(), stderr, perror(), FILE,
 
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                                   vfprintf() */
 
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#include <stdarg.h>             /* va_list, va_start(), vfprintf() */
 
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#include <stdlib.h>             /* EXIT_SUCCESS */
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#include <netlink/netlink.h>    /* struct nl_addr, nl_addr_parse(),
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                                   nl_geterror(),
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                                   nl_addr_get_family(),
 
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                                   nl_addr_get_family(), NLM_F_EXCL,
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                                   nl_addr_put() */
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#include <netlink/route/route.h> /* struct rtnl_route,
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                                    struct rtnl_nexthop,
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                                    rtnl_route_alloc(),
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                                    rtnl_route_set_family(),
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                                    rtnl_route_set_protocol(),
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                                    RTPROT_BOOT,
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                                    rtnl_route_set_scope(),
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                                    RT_SCOPE_LINK,
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                                    rtnl_route_set_type(),
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                                    RTN_UNICAST,
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                                    rtnl_route_set_dst(),
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                                    rtnl_route_set_table(),
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                                    RT_TABLE_MAIN,
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                                    rtnl_route_nh_alloc(),
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                                    rtnl_route_nh_set_ifindex(),
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                                    rtnl_route_add_nexthop(),
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                                    rtnl_route_add(),
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                                    rtnl_route_delete(),
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                                    rtnl_route_put(),
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                                    rtnl_route_nh_free() */
 
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#include <stddef.h>             /* NULL */
 
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#include <netlink/route/route.h>/* struct rtnl_route,
 
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                                   struct rtnl_nexthop, NETLINK_ROUTE,
 
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                                   rtnl_route_alloc(),
 
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                                   rtnl_route_set_family(),
 
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                                   rtnl_route_set_protocol(),
 
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                                   RTPROT_BOOT,
 
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                                   rtnl_route_set_scope(),
 
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                                   RT_SCOPE_LINK,
 
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                                   rtnl_route_set_type(), RTN_UNICAST,
 
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                                   rtnl_route_set_dst(),
 
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                                   rtnl_route_set_table(),
 
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                                   RT_TABLE_MAIN,
 
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                                   rtnl_route_nh_alloc(),
 
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                                   rtnl_route_nh_set_ifindex(),
 
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                                   rtnl_route_add_nexthop(),
 
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                                   rtnl_route_add(),
 
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                                   rtnl_route_delete(),
 
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                                   rtnl_route_put(),
 
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                                   rtnl_route_nh_free() */
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#include <netlink/socket.h>     /* struct nl_sock, nl_socket_alloc(),
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                                   nl_connect(), nl_socket_free() */
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#include <netlink/route/link.h> /* rtnl_link_get_kernel(),
 
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#include <strings.h>            /* strcasecmp() */
 
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#include <sys/socket.h>         /* AF_UNSPEC, AF_INET6, AF_INET */
 
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#include <sysexits.h>           /* EX_USAGE, EX_OSERR */
 
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#include <netlink/route/link.h> /* struct rtnl_link,
 
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                                   rtnl_link_get_kernel(),
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                                   rtnl_link_get_ifindex(),
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                                   rtnl_link_put() */
 
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#include <netinet/in.h>         /* sa_family_t */
 
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#include <inttypes.h>           /* PRIdMAX, intmax_t */
 
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#include <stdint.h>             /* uint8_t */
 
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bool debug = false;
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const char *argp_program_version = "mandos-client-iprouteadddel " VERSION;
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__attribute__((format (gnu_printf, 2, 3), nonnull))
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int fprintf_plus(FILE *stream, const char *format, ...){
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  va_list ap;
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  va_start (ap, format);
 
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  va_start(ap, format);
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  fprintf(stream, "Mandos plugin helper %s: ",
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          program_invocation_short_name);
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  }
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  /* Set interface index number on nexthop object */
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  rtnl_route_nh_set_ifindex(nexthop, ifindex);
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  /* Set route tu use nexthop object */
 
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  /* Set route to use nexthop object */
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  rtnl_route_add_nexthop(route, nexthop);
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  /* Add or delete route? */
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  if(arguments.add){