Agrego interfaces veth.

src/Makefile.am

@@ -9,6 +9,7 @@ network_inador_SOURCES = main.c \
 	interfaces.c interfaces.h \
 	ip-address.c ip-address.h \
 	bridge.c bridge.h \
+	veth.c veth.h \
 	manager.c manager.h \
 	dhcp_client.c dhcp_client.h \
 	routes.c routes.h \

src/dhcp_client.c

@@ -97,6 +97,7 @@ void interfaces_dhcp_client_killed_cb (GPid pid, gint status, gpointer data) {
 	}
 	
 	interfaces_dhcp_clear_info (&iface->dhcpc);
+	/* FIXME: ¿Debemos limpiar la información de DNS si no la movimos? */
 	resolv_manager_clear_dhcp_nameservers (iface->handle, iface);
 	
 	/* Enviar actualización de estado aquí */
@@ -345,7 +346,7 @@ void interfaces_dhcp_client_internal_feed_from_client (NetworkInadorHandle *hand
 			dns_changed = 1;
 		}
 		
-		if (dns_changed) {
+		if (dns_changed && (iface->dhcpc.flags & DHCP_CLIENT_FLAG_DONT_ADD_DNS_INFO) == 0) {
 			resolv_manager_process_dhcp_nameservers (handle, iface);
 		}
 		
@@ -372,6 +373,7 @@ void interfaces_dhcp_client_internal_feed_from_client (NetworkInadorHandle *hand
 		/* Cuando entramos a SELECTING, debemos limpiar los DNS del resolv.conf */
 		interfaces_dhcp_clear_info (&iface->dhcpc);
 		
+		/* FIXME: ¿Debemos limpiar la información DNS si no la movimos? */
 		resolv_manager_clear_dhcp_nameservers (handle, iface);
 	}
 	

src/main.c

@@ -47,6 +47,7 @@
 #include "dhcp_client.h"
 #include "routes.h"
 #include "resolv_manager.h"
+#include "veth.h"
 
 /* Usados para salir en caso de una señal */
 static int sigterm_pipe_fds[2] = { -1, -1 };

src/veth.c

@@ -0,0 +1,166 @@
+/*
+ * veth.c
+ * This file is part of Network-inador
+ *
+ * Copyright (C) 2023 - Félix Arreola Rodríguez
+ *
+ * Network-inador is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Network-inador is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Network-inador; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, 
+ * Boston, MA  02110-1301  USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netlink/socket.h>
+#include <netlink/msg.h>
+
+#include <net/ethernet.h>
+#include <net/if_arp.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <linux/veth.h>
+
+#include "common.h"
+#include "interfaces.h"
+
+int interfaces_veth_create (NetworkInadorHandle *handle, const char *link_name, const char *peer_name) {
+	struct nl_msg * msg;
+	struct ifinfomsg iface_hdr, peer_hdr;
+	struct nlattr *info, *data, *peer;
+	int ret, error, len;
+	const char *type = "veth";
+	
+	if (link_name != NULL) {
+		/* Validar la longitud del nombre, por seguridad */
+		len = strlen (link_name) + 1;
+		if (len == 1) {
+			/* Nombre muy corto */
+			return -1;
+		}
+		if (len > IFNAMSIZ) {
+			/* Nombre muy largo */
+			return -1;
+		}
+	}
+	
+	if (peer_name != NULL) {
+		/* Validar la longitud del nombre, por seguridad */
+		len = strlen (peer_name) + 1;
+		if (len == 1) {
+			/* Nombre muy corto */
+			return -1;
+		}
+		if (len > IFNAMSIZ) {
+			/* Nombre muy largo */
+			return -1;
+		}
+	}
+	
+	memset (&iface_hdr, 0, sizeof (iface_hdr));
+	iface_hdr.ifi_family = AF_UNSPEC;
+	iface_hdr.ifi_index = 0;
+	
+	msg = nlmsg_alloc_simple (RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
+	ret = nlmsg_append (msg, &iface_hdr, sizeof (iface_hdr), NLMSG_ALIGNTO);
+	
+	if (ret != 0) {
+		nlmsg_free (msg);
+		
+		return -1;
+	}
+	
+	/* Anexar el nombre, si es que especificaron uno */
+	if (link_name != NULL) {
+		ret = nla_put (msg, IFLA_IFNAME, strlen (link_name) + 1, link_name);
+		
+		if (ret != 0) {
+			nlmsg_free (msg);
+			
+			return -1;
+		}
+	}
+	
+	info = nla_nest_start (msg, IFLA_LINKINFO);
+	
+	if (info == NULL) {
+		nlmsg_free (msg);
+		
+		return -1;
+	}
+	
+	//ret = nla_put_string (msg, IFLA_INFO_KIND, type);
+	ret = nla_put (msg, IFLA_INFO_KIND, strlen (type), type);
+	
+	if (ret != 0) {
+		nla_nest_end (msg, info);
+		nlmsg_free (msg);
+		
+		return -1;
+	}
+	
+	/* Ver cómo anexar IFLA_INFO_DATA */
+	data = nla_nest_start (msg, IFLA_INFO_DATA);
+	
+	/* Vaciar la estructura del peer */
+	memset (&peer_hdr, 0, sizeof (peer_hdr));
+	peer_hdr.ifi_family = AF_UNSPEC;
+	peer_hdr.ifi_index = 0;
+	
+	peer = nla_nest_start (msg, VETH_INFO_PEER);
+	nlmsg_append (msg, &peer_hdr, sizeof (peer_hdr), 0);
+	
+	if (peer_name != NULL) {
+		ret = nla_put (msg, IFLA_IFNAME, strlen (peer_name) + 1, peer_name);
+		
+		if (ret != 0) {
+			nlmsg_free (msg);
+			
+			return -1;
+		}
+	}
+	
+	nla_nest_end (msg, peer); /* Cerrar el VETH_INFO_PEER */
+	
+	nla_nest_end (msg, data); /* Cerrar el IFLA_INFO_DATA */
+	
+	nla_nest_end (msg, info); /* Cerrar el IFLA_LINKINFO */
+	
+	nl_complete_msg (handle->nl_sock_route, msg);
+	
+	ret = nl_send (handle->nl_sock_route, msg);
+	
+	nlmsg_free (msg);
+	if (ret <= 0) {
+		return -1;
+	}
+	
+	error = 0;
+	nl_socket_modify_cb (handle->nl_sock_route, NL_CB_VALID, NL_CB_CUSTOM, _interfaces_wait_ack_or_error, &error);
+	nl_socket_modify_cb (handle->nl_sock_route, NL_CB_INVALID, NL_CB_CUSTOM, _interfaces_wait_ack_or_error, &error);
+	nl_socket_modify_cb (handle->nl_sock_route, NL_CB_ACK, NL_CB_CUSTOM, _interfaces_wait_ack_or_error, &error);
+	nl_socket_modify_err_cb (handle->nl_sock_route, NL_CB_CUSTOM, _interfaces_wait_error, &error);
+	
+	nl_recvmsgs_default (handle->nl_sock_route);
+	
+	if (ret <= 0 || error < 0) {
+		return -1;
+	}
+	
+	return 0;
+}

src/veth.h

@@ -0,0 +1,29 @@
+/*
+ * veth.h
+ * This file is part of Network-inador
+ *
+ * Copyright (C) 2023 - Félix Arreola Rodríguez
+ *
+ * Network-inador is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Network-inador is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Network-inador; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, 
+ * Boston, MA  02110-1301  USA
+ */
+
+#ifndef __VETH_H__
+#define __VETH_H__
+
+int interfaces_veth_create (NetworkInadorHandle *handle, const char *link, const char *peer);
+
+#endif /* __VETH_H__ */
+