794 lines
18 KiB
C
794 lines
18 KiB
C
/*
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* Copyright (C) 2008-2010 Tobias Brunner
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* Copyright (C) 2008 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program 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 the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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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 MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <library.h>
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#include <dumm.h>
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#include <utils/debug.h>
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#include <collections/linked_list.h>
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#undef PACKAGE_NAME
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#undef PACKAGE_TARNAME
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#undef PACKAGE_VERSION
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#undef PACKAGE_STRING
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#undef PACKAGE_BUGREPORT
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#undef PACKAGE_URL
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/* avoid redefintiion of snprintf etc. */
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#define RUBY_DONT_SUBST
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#include <ruby.h>
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static dumm_t *dumm;
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static VALUE rbm_dumm;
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static VALUE rbc_guest;
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static VALUE rbc_bridge;
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static VALUE rbc_iface;
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static VALUE rbc_template;
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/**
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* Guest invocation callback
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*/
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static pid_t invoke(void *null, guest_t *guest, char *args[], int argc)
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{
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pid_t pid;
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pid = fork();
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switch (pid)
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{
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case 0: /* child */
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/* create a new process group in order to prevent signals (e.g.
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* SIGINT) sent to the parent from terminating the child */
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setpgid(0, 0);
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dup2(open("/dev/null", 0), 1);
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dup2(open("/dev/null", 0), 2);
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execvp(args[0], args);
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/* FALL */
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case -1:
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return 0;
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default:
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return pid;
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}
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}
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/**
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* SIGCHLD signal handler
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*/
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static void sigchld_handler(int signal, siginfo_t *info, void* ptr)
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{
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enumerator_t *enumerator;
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guest_t *guest;
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enumerator = dumm->create_guest_enumerator(dumm);
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while (enumerator->enumerate(enumerator, &guest))
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{
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if (guest->get_pid(guest) == info->si_pid)
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{
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guest->sigchild(guest);
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break;
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}
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}
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enumerator->destroy(enumerator);
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}
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/**
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* Global Dumm bindings
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*/
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static VALUE dumm_add_overlay(VALUE class, VALUE dir)
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{
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if (!dumm->add_overlay(dumm, StringValuePtr(dir)))
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{
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rb_raise(rb_eRuntimeError, "loading overlay failed");
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}
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return class;
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}
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static VALUE dumm_del_overlay(VALUE class, VALUE dir)
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{
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return dumm->del_overlay(dumm, StringValuePtr(dir)) ? Qtrue : Qfalse;
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}
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static VALUE dumm_pop_overlay(VALUE class)
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{
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return dumm->pop_overlay(dumm) ? Qtrue : Qfalse;
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}
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static void dumm_init()
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{
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rbm_dumm = rb_define_module("Dumm");
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rb_define_module_function(rbm_dumm, "add_overlay", dumm_add_overlay, 1);
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rb_define_module_function(rbm_dumm, "del_overlay", dumm_del_overlay, 1);
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rb_define_module_function(rbm_dumm, "pop_overlay", dumm_pop_overlay, 0);
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}
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/**
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* Guest bindings
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*/
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static VALUE guest_hash_create(VALUE class)
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{
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enumerator_t *enumerator;
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guest_t *guest;
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VALUE hash = rb_hash_new();
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enumerator = dumm->create_guest_enumerator(dumm);
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while (enumerator->enumerate(enumerator, &guest))
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{
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rb_hash_aset(hash, rb_str_new2(guest->get_name(guest)),
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Data_Wrap_Struct(class, NULL, NULL, guest));
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}
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enumerator->destroy(enumerator);
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return hash;
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}
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static VALUE guest_hash(VALUE class)
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{
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ID id = rb_intern("@@guests");
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if (!rb_cvar_defined(class, id))
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{
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VALUE hash = guest_hash_create(class);
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#ifdef RB_CVAR_SET_4_ARGS
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rb_cvar_set(class, id, hash, 0);
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#else
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rb_cvar_set(class, id, hash);
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#endif
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return hash;
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}
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return rb_cvar_get(class, id);
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}
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static VALUE guest_find(VALUE class, VALUE key)
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{
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if (TYPE(key) != T_STRING)
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{
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key = rb_convert_type(key, T_STRING, "String", "to_s");
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}
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return rb_hash_aref(guest_hash(class), key);
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}
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static VALUE guest_get(VALUE class, VALUE key)
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{
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return guest_find(class, key);
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}
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static VALUE guest_each(int argc, VALUE *argv, VALUE class)
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{
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if (!rb_block_given_p())
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{
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rb_raise(rb_eArgError, "must be called with a block");
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}
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rb_block_call(guest_hash(class), rb_intern("each_value"), 0, 0,
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rb_yield, 0);
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return class;
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}
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static VALUE guest_new(VALUE class, VALUE name, VALUE kernel,
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VALUE master, VALUE args)
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{
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VALUE self;
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guest_t *guest;
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guest = dumm->create_guest(dumm, StringValuePtr(name),
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StringValuePtr(kernel), StringValuePtr(master),
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StringValuePtr(args));
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if (!guest)
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{
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rb_raise(rb_eRuntimeError, "creating guest failed");
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}
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self = Data_Wrap_Struct(class, NULL, NULL, guest);
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rb_hash_aset(guest_hash(class), name, self);
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return self;
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}
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static VALUE guest_to_s(VALUE self)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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return rb_str_new2(guest->get_name(guest));
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}
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static VALUE guest_start(VALUE self)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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if (!guest->start(guest, invoke, NULL, NULL))
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{
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rb_raise(rb_eRuntimeError, "starting guest failed");
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}
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return self;
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}
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static VALUE guest_stop(VALUE self)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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guest->stop(guest, NULL);
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return self;
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}
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static VALUE guest_running(VALUE self)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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return guest->get_pid(guest) ? Qtrue : Qfalse;
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}
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static void exec_cb(void *data, char *buf)
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{
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rb_yield(rb_str_new2(buf));
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}
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static VALUE guest_exec(VALUE self, VALUE cmd)
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{
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guest_t *guest;
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bool block;
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int ret;
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block = rb_block_given_p();
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Data_Get_Struct(self, guest_t, guest);
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ret = guest->exec_str(guest, block ? (void*)exec_cb : NULL, TRUE, NULL,
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"exec %s", StringValuePtr(cmd));
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rb_iv_set(self, "@execstatus", INT2NUM(ret));
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return self;
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}
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static VALUE guest_mconsole(VALUE self, VALUE cmd)
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{
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guest_t *guest;
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bool block;
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int ret;
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block = rb_block_given_p();
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Data_Get_Struct(self, guest_t, guest);
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if ((ret = guest->exec_str(guest, block ? (void*)exec_cb : NULL, TRUE, NULL,
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"%s", StringValuePtr(cmd))) != 0)
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{
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rb_raise(rb_eRuntimeError, "executing command failed (%d)", ret);
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}
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return self;
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}
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static VALUE guest_add_iface(VALUE self, VALUE name)
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{
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guest_t *guest;
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iface_t *iface;
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Data_Get_Struct(self, guest_t, guest);
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iface = guest->create_iface(guest, StringValuePtr(name));
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if (!iface)
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{
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rb_raise(rb_eRuntimeError, "adding interface failed");
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}
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return Data_Wrap_Struct(rbc_iface, NULL, NULL, iface);
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}
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static VALUE guest_find_iface(VALUE self, VALUE key)
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{
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enumerator_t *enumerator;
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iface_t *iface, *found = NULL;
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guest_t *guest;
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if (TYPE(key) == T_SYMBOL)
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{
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key = rb_convert_type(key, T_STRING, "String", "to_s");
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}
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Data_Get_Struct(self, guest_t, guest);
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enumerator = guest->create_iface_enumerator(guest);
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while (enumerator->enumerate(enumerator, &iface))
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{
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if (streq(iface->get_guestif(iface), StringValuePtr(key)))
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{
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found = iface;
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break;
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}
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}
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enumerator->destroy(enumerator);
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if (!found)
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{
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return Qnil;
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}
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return Data_Wrap_Struct(rbc_iface, NULL, NULL, iface);
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}
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static VALUE guest_get_iface(VALUE self, VALUE key)
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{
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VALUE iface = guest_find_iface(self, key);
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if (NIL_P(iface))
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{
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rb_raise(rb_eRuntimeError, "interface not found");
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}
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return iface;
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}
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static VALUE guest_each_iface(int argc, VALUE *argv, VALUE self)
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{
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enumerator_t *enumerator;
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linked_list_t *list;
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guest_t *guest;
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iface_t *iface;
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if (!rb_block_given_p())
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{
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rb_raise(rb_eArgError, "must be called with a block");
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}
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Data_Get_Struct(self, guest_t, guest);
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list = linked_list_create();
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enumerator = guest->create_iface_enumerator(guest);
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while (enumerator->enumerate(enumerator, &iface))
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{
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list->insert_last(list, iface);
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}
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enumerator->destroy(enumerator);
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while (list->remove_first(list, (void**)&iface) == SUCCESS)
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{
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rb_yield(Data_Wrap_Struct(rbc_iface, NULL, NULL, iface));
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}
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list->destroy(list);
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return self;
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}
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static VALUE guest_delete(VALUE self)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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if (guest->get_pid(guest))
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{
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rb_raise(rb_eRuntimeError, "guest is running");
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}
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dumm->delete_guest(dumm, guest);
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return Qnil;
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}
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static VALUE guest_add_overlay(VALUE self, VALUE dir)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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if (!guest->add_overlay(guest, StringValuePtr(dir)))
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{
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rb_raise(rb_eRuntimeError, "loading overlay failed");
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}
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return self;
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}
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static VALUE guest_del_overlay(VALUE self, VALUE dir)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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return guest->del_overlay(guest, StringValuePtr(dir)) ? Qtrue : Qfalse;
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}
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static VALUE guest_pop_overlay(VALUE self)
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{
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guest_t *guest;
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Data_Get_Struct(self, guest_t, guest);
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return guest->pop_overlay(guest) ? Qtrue : Qfalse;
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}
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static void guest_init()
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{
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rbc_guest = rb_define_class_under(rbm_dumm , "Guest", rb_cObject);
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rb_include_module(rb_class_of(rbc_guest), rb_mEnumerable);
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rb_include_module(rbc_guest, rb_mEnumerable);
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rb_define_singleton_method(rbc_guest, "[]", guest_get, 1);
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rb_define_singleton_method(rbc_guest, "each", guest_each, -1);
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rb_define_singleton_method(rbc_guest, "new", guest_new, 4);
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rb_define_singleton_method(rbc_guest, "include?", guest_find, 1);
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rb_define_singleton_method(rbc_guest, "guest?", guest_find, 1);
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rb_define_method(rbc_guest, "to_s", guest_to_s, 0);
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rb_define_method(rbc_guest, "start", guest_start, 0);
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rb_define_method(rbc_guest, "stop", guest_stop, 0);
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rb_define_method(rbc_guest, "running?", guest_running, 0);
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rb_define_method(rbc_guest, "exec", guest_exec, 1);
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rb_define_method(rbc_guest, "mconsole", guest_mconsole, 1);
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rb_define_method(rbc_guest, "add", guest_add_iface, 1);
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rb_define_method(rbc_guest, "[]", guest_get_iface, 1);
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rb_define_method(rbc_guest, "each", guest_each_iface, -1);
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rb_define_method(rbc_guest, "include?", guest_find_iface, 1);
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rb_define_method(rbc_guest, "iface?", guest_find_iface, 1);
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rb_define_method(rbc_guest, "delete", guest_delete, 0);
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rb_define_method(rbc_guest, "add_overlay", guest_add_overlay, 1);
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rb_define_method(rbc_guest, "del_overlay", guest_del_overlay, 1);
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rb_define_method(rbc_guest, "pop_overlay", guest_pop_overlay, 0);
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rb_define_attr(rbc_guest, "execstatus", 1, 0);
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}
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/**
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* Bridge binding
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*/
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static VALUE bridge_find(VALUE class, VALUE key)
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{
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enumerator_t *enumerator;
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bridge_t *bridge, *found = NULL;
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if (TYPE(key) == T_SYMBOL)
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{
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key = rb_convert_type(key, T_STRING, "String", "to_s");
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}
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enumerator = dumm->create_bridge_enumerator(dumm);
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while (enumerator->enumerate(enumerator, &bridge))
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{
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if (streq(bridge->get_name(bridge), StringValuePtr(key)))
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{
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found = bridge;
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break;
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}
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}
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enumerator->destroy(enumerator);
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if (!found)
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{
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return Qnil;
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}
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return Data_Wrap_Struct(class, NULL, NULL, found);
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}
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static VALUE bridge_get(VALUE class, VALUE key)
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{
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VALUE bridge = bridge_find(class, key);
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if (NIL_P(bridge))
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{
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rb_raise(rb_eRuntimeError, "bridge not found");
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}
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return bridge;
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}
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static VALUE bridge_each(int argc, VALUE *argv, VALUE class)
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{
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enumerator_t *enumerator;
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linked_list_t *list;
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bridge_t *bridge;
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if (!rb_block_given_p())
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{
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rb_raise(rb_eArgError, "must be called with a block");
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}
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list = linked_list_create();
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enumerator = dumm->create_bridge_enumerator(dumm);
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while (enumerator->enumerate(enumerator, &bridge))
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{
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list->insert_last(list, bridge);
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}
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enumerator->destroy(enumerator);
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while (list->remove_first(list, (void**)&bridge) == SUCCESS)
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{
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rb_yield(Data_Wrap_Struct(class, NULL, NULL, bridge));
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}
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list->destroy(list);
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return class;
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}
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static VALUE bridge_new(VALUE class, VALUE name)
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{
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bridge_t *bridge;
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bridge = dumm->create_bridge(dumm, StringValuePtr(name));
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if (!bridge)
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{
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rb_raise(rb_eRuntimeError, "creating bridge failed");
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}
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return Data_Wrap_Struct(class, NULL, NULL, bridge);
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}
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static VALUE bridge_to_s(VALUE self)
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{
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bridge_t *bridge;
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Data_Get_Struct(self, bridge_t, bridge);
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return rb_str_new2(bridge->get_name(bridge));
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}
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static VALUE bridge_each_iface(int argc, VALUE *argv, VALUE self)
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{
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enumerator_t *enumerator;
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linked_list_t *list;
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bridge_t *bridge;
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iface_t *iface;
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if (!rb_block_given_p())
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{
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rb_raise(rb_eArgError, "must be called with a block");
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}
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Data_Get_Struct(self, bridge_t, bridge);
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list = linked_list_create();
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enumerator = bridge->create_iface_enumerator(bridge);
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while (enumerator->enumerate(enumerator, &iface))
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{
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list->insert_last(list, iface);
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}
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enumerator->destroy(enumerator);
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while (list->remove_first(list, (void**)&iface) == SUCCESS)
|
|
{
|
|
rb_yield(Data_Wrap_Struct(rbc_iface, NULL, NULL, iface));
|
|
}
|
|
list->destroy(list);
|
|
return self;
|
|
}
|
|
|
|
static VALUE bridge_delete(VALUE self)
|
|
{
|
|
bridge_t *bridge;
|
|
|
|
Data_Get_Struct(self, bridge_t, bridge);
|
|
dumm->delete_bridge(dumm, bridge);
|
|
return Qnil;
|
|
}
|
|
|
|
static void bridge_init()
|
|
{
|
|
rbc_bridge = rb_define_class_under(rbm_dumm , "Bridge", rb_cObject);
|
|
rb_include_module(rb_class_of(rbc_bridge), rb_mEnumerable);
|
|
rb_include_module(rbc_bridge, rb_mEnumerable);
|
|
|
|
rb_define_singleton_method(rbc_bridge, "[]", bridge_get, 1);
|
|
rb_define_singleton_method(rbc_bridge, "each", bridge_each, -1);
|
|
rb_define_singleton_method(rbc_bridge, "new", bridge_new, 1);
|
|
rb_define_singleton_method(rbc_bridge, "include?", bridge_find, 1);
|
|
rb_define_singleton_method(rbc_bridge, "bridge?", bridge_find, 1);
|
|
|
|
rb_define_method(rbc_bridge, "to_s", bridge_to_s, 0);
|
|
rb_define_method(rbc_bridge, "each", bridge_each_iface, -1);
|
|
rb_define_method(rbc_bridge, "delete", bridge_delete, 0);
|
|
}
|
|
|
|
/**
|
|
* Iface wrapper
|
|
*/
|
|
static VALUE iface_to_s(VALUE self)
|
|
{
|
|
iface_t *iface;
|
|
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
return rb_str_new2(iface->get_hostif(iface));
|
|
}
|
|
|
|
static VALUE iface_connect(VALUE self, VALUE vbridge)
|
|
{
|
|
iface_t *iface;
|
|
bridge_t *bridge;
|
|
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
Data_Get_Struct(vbridge, bridge_t, bridge);
|
|
if (!bridge->connect_iface(bridge, iface))
|
|
{
|
|
rb_raise(rb_eRuntimeError, "connecting iface failed");
|
|
}
|
|
return self;
|
|
}
|
|
|
|
static VALUE iface_disconnect(VALUE self)
|
|
{
|
|
iface_t *iface;
|
|
bridge_t *bridge;
|
|
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
bridge = iface->get_bridge(iface);
|
|
if (!bridge || !bridge->disconnect_iface(bridge, iface))
|
|
{
|
|
rb_raise(rb_eRuntimeError, "disconnecting iface failed");
|
|
}
|
|
return self;
|
|
}
|
|
|
|
static VALUE iface_add_addr(VALUE self, VALUE name)
|
|
{
|
|
iface_t *iface;
|
|
host_t *addr;
|
|
int bits;
|
|
|
|
addr = host_create_from_subnet(StringValuePtr(name), &bits);
|
|
if (!addr)
|
|
{
|
|
rb_raise(rb_eArgError, "invalid IP address");
|
|
}
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
if (!iface->add_address(iface, addr, bits))
|
|
{
|
|
addr->destroy(addr);
|
|
rb_raise(rb_eRuntimeError, "adding address failed");
|
|
}
|
|
if (rb_block_given_p()) {
|
|
rb_yield(self);
|
|
iface->delete_address(iface, addr, bits);
|
|
}
|
|
addr->destroy(addr);
|
|
return self;
|
|
}
|
|
|
|
static VALUE iface_each_addr(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
enumerator_t *enumerator;
|
|
linked_list_t *list;
|
|
iface_t *iface;
|
|
host_t *addr;
|
|
char buf[64];
|
|
|
|
if (!rb_block_given_p())
|
|
{
|
|
rb_raise(rb_eArgError, "must be called with a block");
|
|
}
|
|
list = linked_list_create();
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
enumerator = iface->create_address_enumerator(iface);
|
|
while (enumerator->enumerate(enumerator, &addr))
|
|
{
|
|
list->insert_last(list, addr->clone(addr));
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
while (list->remove_first(list, (void**)&addr) == SUCCESS)
|
|
{
|
|
snprintf(buf, sizeof(buf), "%H", addr);
|
|
addr->destroy(addr);
|
|
rb_yield(rb_str_new2(buf));
|
|
}
|
|
list->destroy(list);
|
|
return self;
|
|
}
|
|
|
|
static VALUE iface_del_addr(VALUE self, VALUE vaddr)
|
|
{
|
|
iface_t *iface;
|
|
host_t *addr;
|
|
int bits;
|
|
|
|
addr = host_create_from_subnet(StringValuePtr(vaddr), &bits);
|
|
if (!addr)
|
|
{
|
|
rb_raise(rb_eArgError, "invalid IP address");
|
|
}
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
if (!iface->delete_address(iface, addr, bits))
|
|
{
|
|
addr->destroy(addr);
|
|
rb_raise(rb_eRuntimeError, "address not found");
|
|
}
|
|
if (rb_block_given_p()) {
|
|
rb_yield(self);
|
|
iface->add_address(iface, addr, bits);
|
|
}
|
|
addr->destroy(addr);
|
|
return self;
|
|
}
|
|
|
|
static VALUE iface_delete(VALUE self)
|
|
{
|
|
guest_t *guest;
|
|
iface_t *iface;
|
|
|
|
Data_Get_Struct(self, iface_t, iface);
|
|
guest = iface->get_guest(iface);
|
|
guest->destroy_iface(guest, iface);
|
|
return Qnil;
|
|
}
|
|
|
|
static void iface_init()
|
|
{
|
|
rbc_iface = rb_define_class_under(rbm_dumm , "Iface", rb_cObject);
|
|
rb_include_module(rbc_iface, rb_mEnumerable);
|
|
|
|
rb_define_method(rbc_iface, "to_s", iface_to_s, 0);
|
|
rb_define_method(rbc_iface, "connect", iface_connect, 1);
|
|
rb_define_method(rbc_iface, "disconnect", iface_disconnect, 0);
|
|
rb_define_method(rbc_iface, "add", iface_add_addr, 1);
|
|
rb_define_method(rbc_iface, "del", iface_del_addr, 1);
|
|
rb_define_method(rbc_iface, "each", iface_each_addr, -1);
|
|
rb_define_method(rbc_iface, "delete", iface_delete, 0);
|
|
}
|
|
|
|
static VALUE template_load(VALUE class, VALUE dir)
|
|
{
|
|
if (!dumm->load_template(dumm, StringValuePtr(dir)))
|
|
{
|
|
rb_raise(rb_eRuntimeError, "loading template failed");
|
|
}
|
|
return class;
|
|
}
|
|
|
|
static VALUE template_unload(VALUE class)
|
|
{
|
|
if (!dumm->load_template(dumm, NULL))
|
|
{
|
|
rb_raise(rb_eRuntimeError, "unloading template failed");
|
|
}
|
|
return class;
|
|
}
|
|
|
|
static VALUE template_each(int argc, VALUE *argv, VALUE class)
|
|
{
|
|
enumerator_t *enumerator;
|
|
char *template;
|
|
|
|
if (!rb_block_given_p())
|
|
{
|
|
rb_raise(rb_eArgError, "must be called with a block");
|
|
}
|
|
enumerator = dumm->create_template_enumerator(dumm);
|
|
while (enumerator->enumerate(enumerator, &template))
|
|
{
|
|
rb_yield(rb_str_new2(template));
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
return class;
|
|
}
|
|
|
|
static void template_init()
|
|
{
|
|
rbc_template = rb_define_class_under(rbm_dumm , "Template", rb_cObject);
|
|
rb_include_module(rb_class_of(rbc_template), rb_mEnumerable);
|
|
|
|
rb_define_singleton_method(rbc_template, "load", template_load, 1);
|
|
rb_define_singleton_method(rbc_template, "unload", template_unload, 0);
|
|
rb_define_singleton_method(rbc_template, "each", template_each, -1);
|
|
}
|
|
|
|
/**
|
|
* extension finalization
|
|
*/
|
|
void Final_dumm()
|
|
{
|
|
struct sigaction action;
|
|
|
|
dumm->destroy(dumm);
|
|
|
|
sigemptyset(&action.sa_mask);
|
|
action.sa_handler = SIG_DFL;
|
|
action.sa_flags = 0;
|
|
sigaction(SIGCHLD, &action, NULL);
|
|
|
|
library_deinit();
|
|
}
|
|
|
|
/**
|
|
* extension initialization
|
|
*/
|
|
void Init_dumm()
|
|
{
|
|
struct sigaction action;
|
|
|
|
/* there are too many to report, rubyruby... */
|
|
setenv("LEAK_DETECTIVE_DISABLE", "1", 1);
|
|
|
|
library_init(NULL, "dumm");
|
|
|
|
dumm = dumm_create(NULL);
|
|
|
|
dumm_init();
|
|
guest_init();
|
|
bridge_init();
|
|
iface_init();
|
|
template_init();
|
|
|
|
sigemptyset(&action.sa_mask);
|
|
action.sa_sigaction = sigchld_handler;
|
|
action.sa_flags = SA_SIGINFO;
|
|
sigaction(SIGCHLD, &action, NULL);
|
|
|
|
rb_set_end_proc(Final_dumm, 0);
|
|
}
|