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Comment:Added brctl support
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SHA1: 2d80cf430beea1030b4a0dd85de2064cba1d11f2
User & Date: rkeene on 2012-08-22 03:31:33
Other Links: manifest | tags
Context
2012-08-22
03:36
Added stub for "vconfig" check-in: 1fce677508 user: rkeene tags: trunk
03:31
Added brctl support check-in: 2d80cf430b user: rkeene tags: trunk
2012-08-11
23:17
Corrected bug in "ifconfig" check-in: 704748fc41 user: rkeene tags: trunk
Changes
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Modified build-dyn.sh from [02da656833] to [078554ca42]. 

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# /bin/bash

# Perform common build options
. build-common.sh

# Compile using the same options as Tcl
TCLCONFIGSH="$(find /usr/lib /usr/local/lib /lib -name tclConfig.sh -print -quit)"
TCLCONFIGSH="$(find /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 /lib /lib64 -name tclConfig.sh -print -quit)"

. "${TCLCONFIGSH}"

echo "${TCL_CC} -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} ${TCL_STUB_LIB_SPEC} -shared -rdynamic -o system.so system.c"
eval ${TCL_CC} -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} ${TCL_STUB_LIB_SPEC} -shared -rdynamic -o system.so system.c
echo "${TCL_CC} -fPIC -DPIC -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} ${TCL_STUB_LIB_SPEC} -shared -rdynamic -o system.so system.c"
eval ${TCL_CC} -fPIC -DPIC -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} ${TCL_STUB_LIB_SPEC} -shared -rdynamic -o system.so system.c

Modified system.c from [382721d0da] to [1594c1fd70].

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#include <errno.h>
#include <tcl.h>

#include <linux/sockios.h>
#include <linux/route.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/if_bridge.h>
#include <linux/loop.h>
#include <linux/fs.h>

#ifndef HOST_NAME_MAX
/* SUSv2 Limit */
#define HOST_NAME_MAX 255
#endif
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	hashval_obj = Tcl_NewObj();
	Tcl_SetWideIntObj(hashval_obj, hashval);

	Tcl_SetObjResult(interp, hashval_obj);

	return(TCL_OK);
}

static int tclsystem_internal_getsock(int *sock_v4_out, int *sock_v6_out) {
	int sock_v4 = -1, sock_v6 = -1;
	int sock;

	if (sock_v4_out == NULL && sock_v6_out == NULL) {
		return(-1);
	}

	if (sock_v4_out != NULL) {
		/*
		 * Check for IPv4 support before trying to create an IPv4 socket to
		 * avoid demand-loading IPv4 (XXX: TODO)
		 */
		sock_v4 = socket(AF_INET, SOCK_DGRAM, 0);
	}

	if (sock_v6_out != NULL) {
		/*
		 * Check for IPv6 support before trying to create an IPv6 socket to
		 * avoid demand-loading IPv6 (XXX: TODO)
		 */
		sock_v6 = socket(AF_INET6, SOCK_DGRAM, 0);
	}

	/* Pick a socket to query for the interface list */
	if (sock_v4 == -1 && sock_v6 == -1) {
		return(-1);
	}

	if (sock_v6 != -1) {
		sock = sock_v6;
	} else {
		sock = sock_v4;
	}

	if (sock_v4_out != NULL) {
		*sock_v4_out = sock_v4;
	}

	if (sock_v6_out != NULL) {
		*sock_v6_out = sock_v6;
	}

	return(sock);
}

/*
 * Low-level System Call Wrapper Procedures
 *
 * These procedures should minimally wrap Linux or UNIX system calls to
 * expose to the Tcl-level.  Where possible accept symbolic names rather
 * than numeric values (.e.g, list of values to OR together to get flags).
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	return(TCL_OK);
}

static int tclsystem_ifconfig(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
	int sock_v4, sock_v6, sock;
	int retval = TCL_ERROR;

	/*
	 * Check for IPv4 support before trying to create an IPv4 socket to
	 * avoid demand-loading IPv4 (XXX: TODO)
	 */
	sock_v4 = socket(AF_INET, SOCK_DGRAM, 0);

	sock = tclsystem_internal_getsock(&sock_v4, &sock_v6);
	/*
	 * Check for IPv6 support before trying to create an IPv6 socket to
	 * avoid demand-loading IPv6 (XXX: TODO)
	 */
	sock_v6 = socket(AF_INET6, SOCK_DGRAM, 0);

	if (sock == -1) {
	/* Pick a socket to query for the interface list */
	if (sock_v4 == -1 && sock_v6 == -1) {
		/* Report failure */
		Tcl_SetObjResult(interp, Tcl_NewStringObj("unable to create socket", -1));

		return(TCL_ERROR);
	}

	if (sock_v6 != -1) {
		sock = sock_v6;
	} else {
		sock = sock_v4;
	}

	switch (objc) {
		case 0:
		case 1: /* No arguments, list all interfaces */
			retval = tclsystem_ifconfig_list(cd, interp, objc, objv, sock);

			break;
		case 2: /* One argument, give information about the interface */
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	return(TCL_OK);
}

static int tclsystem_route(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
	int sock_v4, sock_v6, sock;
	int retval = TCL_ERROR;

	/*
	 * Check for IPv4 support before trying to create an IPv4 socket to
	 * avoid demand-loading IPv4 (XXX: TODO)
	 */
	sock_v4 = socket(AF_INET, SOCK_DGRAM, 0);

	sock = tclsystem_internal_getsock(&sock_v4, &sock_v6);
	/*
	 * Check for IPv6 support before trying to create an IPv6 socket to
	 * avoid demand-loading IPv6 (XXX: TODO)
	 */
	sock_v6 = socket(AF_INET6, SOCK_DGRAM, 0);

	if (sock == -1) {
	/* Pick a socket to query for the interface list */
	if (sock_v4 == -1 && sock_v6 == -1) {
		/* Report failure */
		Tcl_SetObjResult(interp, Tcl_NewStringObj("unable to create socket", -1));

		return(TCL_ERROR);
	}

	if (sock_v6 != -1) {
		sock = sock_v6;
	} else {
		sock = sock_v4;
	}

	switch (objc) {
		case 0:
		case 1: /* No arguments, list all interfaces */
			retval = tclsystem_route_list(cd, interp, objc, objv, sock_v4, sock_v6);

			break;
		default:
			/* Otherwise, modify routes */
			retval = tclsystem_route_conf(cd, interp, objc, objv, sock_v4, sock_v6);

			break;
	}

	/* Cleanup */
	if (sock_v4 != -1) {
		close(sock_v4);
	}

	if (sock_v6 != -1) {
		close(sock_v6);
	}

	return(retval);
}

static int tclsystem_brctl_list(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], int sock) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("not implemented", -1));

	return(TCL_ERROR);
}

static int tclsystem_brctl_conf(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], int sock) {
	Tcl_Obj *operation_obj, *bridge_name_obj, *interface_name_obj;
	unsigned long arg[4];
	struct ifreq ifr;
	int ioctl_ret, ioctl_id;
	int add = 0;

	/* Determine operation */
	operation_obj = objv[1];
	switch (tclsystem_internal_simplehash_obj(operation_obj)) {
		case 0x1c993272: /* addbr */
			add = 1;
		case 0x4cbb3272: /* delbr */
			if (objc != 3) {
				if (add) {
					Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::system::syscall::brctl addbr bridge\"", -1));
				} else {
					Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::system::syscall::brctl delbr bridge\"", -1));
				}

				return(TCL_ERROR);
			}

			bridge_name_obj = objv[2];

			if (add) {
				arg[0] = BRCTL_ADD_BRIDGE;
			} else {
				arg[0] = BRCTL_DEL_BRIDGE;
			}

			arg[1] = (unsigned long) Tcl_GetString(bridge_name_obj);
			arg[2] = 0;

			ioctl_ret = ioctl(sock, SIOCGIFBR, &arg); 

			break;
		case 0x1C9937E6: /* addif */
			add = 1;
		case 0x4cbb37e6: /* delif */
			if (objc != 4) {
				if (add) {
					Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::system::syscall::brctl addif bridge interface\"", -1));
				} else {
					Tcl_SetObjResult(interp, Tcl_NewStringObj("wrong # args: should be \"::system::syscall::brctl delif bridge interface\"", -1));
				}

				return(TCL_ERROR);
			}

			if (add) {
				ioctl_id = SIOCBRADDIF;
			} else {
				ioctl_id = SIOCBRDELIF;
			}

			bridge_name_obj = objv[2];
			interface_name_obj = objv[3];

			memset(&ifr, 0, sizeof(ifr));
			snprintf(ifr.ifr_name, IFNAMSIZ, "%s", Tcl_GetString(interface_name_obj));

			ioctl_ret = ioctl(sock, SIOCGIFINDEX, (void *) &ifr);
			if (ioctl_ret == 0) {
				snprintf(ifr.ifr_name, IFNAMSIZ, "%s", Tcl_GetString(bridge_name_obj));
				ioctl_ret = ioctl(sock, ioctl_id, (void *) &ifr);
			}

			break;
	}

	if (ioctl_ret < 0) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(strerror(errno), -1));

		return(TCL_ERROR);
	}

	return(TCL_OK);
}

static int tclsystem_brctl(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
	int sock_v4, sock_v6, sock;
	int retval = TCL_ERROR;

	sock = tclsystem_internal_getsock(&sock_v4, &sock_v6);
	if (sock == -1) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj("unable to create socket", -1));

		return(TCL_ERROR);
	}

	switch (objc) {
		case 0:
		case 1: /* No arguments, list all bridges */
			retval = tclsystem_brctl_list(cd, interp, objc, objv, sock);

			break;
		default:
			/* Otherwise, modify routes */
			retval = tclsystem_brctl_conf(cd, interp, objc, objv, sock);

			break;
	}

	/* Cleanup */
	if (sock_v4 != -1) {
		close(sock_v4);
	}
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	Tcl_CreateObjCommand(interp, "::system::syscall::kill", tclsystem_kill, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::system::syscall::ps", tclsystem_ps, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::system::syscall::execve", tclsystem_execve, NULL, NULL);

	/* Network related commands */
	Tcl_CreateObjCommand(interp, "::system::syscall::ifconfig", tclsystem_ifconfig, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::system::syscall::route", tclsystem_route, NULL, NULL);
	Tcl_CreateObjCommand(interp, "::system::syscall::brctl", tclsystem_brctl, NULL, NULL);

	/* Internal functions */
	Tcl_CreateObjCommand(interp, "::system::internal::hash", tclsystem_internalproc_simplehash, NULL, NULL);

	/* Define constants */
	/** Create parent namespace **/
	Tcl_CreateNamespace(interp, "::system::const", NULL, NULL);
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