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path: root/release/src/router/busybox/networking/brctl.c
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Diffstat (limited to 'release/src/router/busybox/networking/brctl.c')
-rw-r--r--release/src/router/busybox/networking/brctl.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/release/src/router/busybox/networking/brctl.c b/release/src/router/busybox/networking/brctl.c
new file mode 100644
index 00000000..1b526894
--- /dev/null
+++ b/release/src/router/busybox/networking/brctl.c
@@ -0,0 +1,286 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Small implementation of brctl for busybox.
+ *
+ * Copyright (C) 2008 by Bernhard Reutner-Fischer
+ *
+ * Some helper functions from bridge-utils are
+ * Copyright (C) 2000 Lennert Buytenhek
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+/* This applet currently uses only the ioctl interface and no sysfs at all.
+ * At the time of this writing this was considered a feature.
+ */
+#include "libbb.h"
+#include <linux/sockios.h>
+#include <net/if.h>
+
+#ifndef SIOCBRADDBR
+# define SIOCBRADDBR BRCTL_ADD_BRIDGE
+#endif
+#ifndef SIOCBRDELBR
+# define SIOCBRDELBR BRCTL_DEL_BRIDGE
+#endif
+#ifndef SIOCBRADDIF
+# define SIOCBRADDIF BRCTL_ADD_IF
+#endif
+#ifndef SIOCBRDELIF
+# define SIOCBRDELIF BRCTL_DEL_IF
+#endif
+
+
+/* Maximum number of ports supported per bridge interface. */
+#ifndef MAX_PORTS
+#define MAX_PORTS 32
+#endif
+
+/* Use internal number parsing and not the "exact" conversion. */
+/* #define BRCTL_USE_INTERNAL 0 */ /* use exact conversion */
+#define BRCTL_USE_INTERNAL 1
+
+#if ENABLE_FEATURE_BRCTL_FANCY
+#include <linux/if_bridge.h>
+
+/* FIXME: These 4 funcs are not really clean and could be improved */
+static ALWAYS_INLINE void strtotimeval(struct timeval *tv,
+ const char *time_str)
+{
+ double secs;
+#if BRCTL_USE_INTERNAL
+ secs = /*bb_*/strtod(time_str, NULL);
+ if (!secs)
+#else
+ if (sscanf(time_str, "%lf", &secs) != 1)
+#endif
+ bb_error_msg_and_die (bb_msg_invalid_arg, time_str, "timespec");
+ tv->tv_sec = secs;
+ tv->tv_usec = 1000000 * (secs - tv->tv_sec);
+}
+
+static ALWAYS_INLINE unsigned long __tv_to_jiffies(const struct timeval *tv)
+{
+ unsigned long long jif;
+
+ jif = 1000000ULL * tv->tv_sec + tv->tv_usec;
+
+ return jif/10000;
+}
+# if 0
+static void __jiffies_to_tv(struct timeval *tv, unsigned long jiffies)
+{
+ unsigned long long tvusec;
+
+ tvusec = 10000ULL*jiffies;
+ tv->tv_sec = tvusec/1000000;
+ tv->tv_usec = tvusec - 1000000 * tv->tv_sec;
+}
+# endif
+static unsigned long str_to_jiffies(const char *time_str)
+{
+ struct timeval tv;
+ strtotimeval(&tv, time_str);
+ return __tv_to_jiffies(&tv);
+}
+
+static void arm_ioctl(unsigned long *args,
+ unsigned long arg0, unsigned long arg1, unsigned long arg2)
+{
+ args[0] = arg0;
+ args[1] = arg1;
+ args[2] = arg2;
+ args[3] = 0;
+}
+#endif
+
+
+int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int brctl_main(int argc UNUSED_PARAM, char **argv)
+{
+ static const char keywords[] ALIGN1 =
+ "addbr\0" "delbr\0" "addif\0" "delif\0"
+ USE_FEATURE_BRCTL_FANCY(
+ "stp\0"
+ "setageing\0" "setfd\0" "sethello\0" "setmaxage\0"
+ "setpathcost\0" "setportprio\0" "setbridgeprio\0"
+ )
+ USE_FEATURE_BRCTL_SHOW("showmacs\0" "show\0");
+
+ enum { ARG_addbr = 0, ARG_delbr, ARG_addif, ARG_delif
+ USE_FEATURE_BRCTL_FANCY(,
+ ARG_stp,
+ ARG_setageing, ARG_setfd, ARG_sethello, ARG_setmaxage,
+ ARG_setpathcost, ARG_setportprio, ARG_setbridgeprio
+ )
+ USE_FEATURE_BRCTL_SHOW(, ARG_showmacs, ARG_show)
+ };
+
+ int fd;
+ smallint key;
+ struct ifreq ifr;
+ char *br, *brif;
+
+ argv++;
+ while (*argv) {
+#if ENABLE_FEATURE_BRCTL_FANCY
+ int ifidx[MAX_PORTS];
+ unsigned long args[4];
+ ifr.ifr_data = (char *) &args;
+#endif
+
+ key = index_in_strings(keywords, *argv);
+ if (key == -1) /* no match found in keywords array, bail out. */
+ bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
+ argv++;
+ fd = xsocket(AF_INET, SOCK_STREAM, 0);
+
+#if ENABLE_FEATURE_BRCTL_SHOW
+ if (key == ARG_show) { /* show */
+ char brname[IFNAMSIZ];
+ int bridx[MAX_PORTS];
+ int i, num;
+ arm_ioctl(args, BRCTL_GET_BRIDGES,
+ (unsigned long) bridx, MAX_PORTS);
+ num = xioctl(fd, SIOCGIFBR, args);
+ printf("bridge name\tbridge id\t\tSTP enabled\tinterfaces\n");
+ for (i = 0; i < num; i++) {
+ char ifname[IFNAMSIZ];
+ int j, tabs;
+ struct __bridge_info bi;
+ unsigned char *x;
+
+ if (!if_indextoname(bridx[i], brname))
+ bb_perror_msg_and_die("can't get bridge name for index %d", i);
+ strncpy_IFNAMSIZ(ifr.ifr_name, brname);
+
+ arm_ioctl(args, BRCTL_GET_BRIDGE_INFO,
+ (unsigned long) &bi, 0);
+ xioctl(fd, SIOCDEVPRIVATE, &ifr);
+ printf("%s\t\t", brname);
+
+ /* print bridge id */
+ x = (unsigned char *) &bi.bridge_id;
+ for (j = 0; j < 8; j++) {
+ printf("%.2x", x[j]);
+ if (j == 1)
+ bb_putchar('.');
+ }
+ printf(bi.stp_enabled ? "\tyes" : "\tno");
+
+ /* print interface list */
+ arm_ioctl(args, BRCTL_GET_PORT_LIST,
+ (unsigned long) ifidx, MAX_PORTS);
+ xioctl(fd, SIOCDEVPRIVATE, &ifr);
+ tabs = 0;
+ for (j = 0; j < MAX_PORTS; j++) {
+ if (!ifidx[j])
+ continue;
+ if (!if_indextoname(ifidx[j], ifname))
+ bb_perror_msg_and_die("can't get interface name for index %d", j);
+ if (tabs)
+ printf("\t\t\t\t\t");
+ else
+ tabs = 1;
+ printf("\t\t%s\n", ifname);
+ }
+ if (!tabs) /* bridge has no interfaces */
+ bb_putchar('\n');
+ }
+ goto done;
+ }
+#endif
+
+ if (!*argv) /* all but 'show' need at least one argument */
+ bb_show_usage();
+
+ br = *argv++;
+
+ if (key == ARG_addbr || key == ARG_delbr) { /* addbr or delbr */
+ ioctl_or_perror_and_die(fd,
+ key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR,
+ br, "bridge %s", br);
+ goto done;
+ }
+
+ if (!*argv) /* all but 'addif/delif' need at least two arguments */
+ bb_show_usage();
+
+ strncpy_IFNAMSIZ(ifr.ifr_name, br);
+ if (key == ARG_addif || key == ARG_delif) { /* addif or delif */
+ brif = *argv;
+ ifr.ifr_ifindex = if_nametoindex(brif);
+ if (!ifr.ifr_ifindex) {
+ bb_perror_msg_and_die("iface %s", brif);
+ }
+ ioctl_or_perror_and_die(fd,
+ key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF,
+ &ifr, "bridge %s", br);
+ goto done_next_argv;
+ }
+#if ENABLE_FEATURE_BRCTL_FANCY
+ if (key == ARG_stp) { /* stp */
+ /* FIXME: parsing yes/y/on/1 versus no/n/off/0 is too involved */
+ arm_ioctl(args, BRCTL_SET_BRIDGE_STP_STATE,
+ (unsigned)(**argv - '0'), 0);
+ goto fire;
+ }
+ if ((unsigned)(key - ARG_setageing) < 4) { /* time related ops */
+ static const uint8_t ops[] ALIGN1 = {
+ BRCTL_SET_AGEING_TIME, /* ARG_setageing */
+ BRCTL_SET_BRIDGE_FORWARD_DELAY, /* ARG_setfd */
+ BRCTL_SET_BRIDGE_HELLO_TIME, /* ARG_sethello */
+ BRCTL_SET_BRIDGE_MAX_AGE /* ARG_setmaxage */
+ };
+ arm_ioctl(args, ops[key - ARG_setageing], str_to_jiffies(*argv), 0);
+ goto fire;
+ }
+ if (key == ARG_setpathcost
+ || key == ARG_setportprio
+ || key == ARG_setbridgeprio
+ ) {
+ static const uint8_t ops[] ALIGN1 = {
+ BRCTL_SET_PATH_COST, /* ARG_setpathcost */
+ BRCTL_SET_PORT_PRIORITY, /* ARG_setportprio */
+ BRCTL_SET_BRIDGE_PRIORITY /* ARG_setbridgeprio */
+ };
+ int port = -1;
+ unsigned arg1, arg2;
+
+ if (key != ARG_setbridgeprio) {
+ /* get portnum */
+ unsigned i;
+
+ port = if_nametoindex(*argv++);
+ if (!port)
+ bb_error_msg_and_die(bb_msg_invalid_arg, *argv, "port");
+ memset(ifidx, 0, sizeof ifidx);
+ arm_ioctl(args, BRCTL_GET_PORT_LIST, (unsigned long)ifidx,
+ MAX_PORTS);
+ xioctl(fd, SIOCDEVPRIVATE, &ifr);
+ for (i = 0; i < MAX_PORTS; i++) {
+ if (ifidx[i] == port) {
+ port = i;
+ break;
+ }
+ }
+ }
+ arg1 = port;
+ arg2 = xatoi_u(*argv);
+ if (key == ARG_setbridgeprio) {
+ arg1 = arg2;
+ arg2 = 0;
+ }
+ arm_ioctl(args, ops[key - ARG_setpathcost], arg1, arg2);
+ }
+ fire:
+ /* Execute the previously set command */
+ xioctl(fd, SIOCDEVPRIVATE, &ifr);
+#endif
+ done_next_argv:
+ argv++;
+ done:
+ close(fd);
+ }
+
+ return EXIT_SUCCESS;
+}
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