1 files changed, 87 insertions, 0 deletions

diff --git a/networking/brctl.c b/networking/brctl.c
new file mode 100644
index 000000000..21d528f91
--- /dev/null
+++ b/networking/brctl.c
@@ -0,0 +1,87 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Small implementation of brctl for busybox.
+ *
+ * Copyright (C) 2008 by Bernhard Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+#include "libbb.h"
+#include <linux/sockios.h>
+#include <net/if.h>
+
+#ifdef ENABLE_FEATURE_BRCTL_SHOW
+#error Remove these
+#endif
+#define ENABLE_FEATURE_BRCTL_SHOW 0
+#define USE_FEATURE_BRCTL_SHOW(...)
+
+
+/* Fancy diagnostics -- printing add/del -- costs 49 bytes. */
+#if 0
+#define BRCTL_VERBOSE(...) __VA_ARGS__
+#else
+#define BRCTL_VERBOSE(...)
+#endif
+
+int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int brctl_main(int argc, char **argv)
+{
+        int fd;
+        static const char keywords[] ALIGN1 =
+                "addbr\0" "delbr\0" "addif\0" "delif\0"
+                USE_FEATURE_BRCTL_SHOW("show\0");
+        enum { ARG_addbr = 1, ARG_delbr, ARG_addif, ARG_delif
+                  USE_FEATURE_BRCTL_SHOW(, ARG_show) };
+        smalluint key;
+        static char info[] = BRCTL_VERBOSE("%s ")"bridge %s\0 iface %s";
+
+        argv++;
+        while (*argv) {
+                BRCTL_VERBOSE(char *op;)
+
+                key = index_in_strings(keywords, *argv) + 1;
+                if (key == 0) /* no match found in keywords array, bail out. */
+                        bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
+                argv++;
+#if ENABLE_FEATURE_BRCTL_SHOW
+                if (key == ARG_show) { /* show */
+                        ;
+                }
+#endif
+                BRCTL_VERBOSE(op = (char*)((key % 2) ? "add" : "del");)
+                fd = xsocket(AF_INET, SOCK_STREAM, 0);
+                if (key < 3) {/* addbr or delbr */
+                        char *br;
+
+                        br = *(argv++);
+                        if (ioctl(fd, key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR, br) < 0)
+                        {
+                                info[9 BRCTL_VERBOSE(+3)] = '\0';
+                                bb_perror_msg_and_die(info, BRCTL_VERBOSE(op,) br);
+                        }
+                }
+                if (key > 2) { /* addif or delif */
+                        struct ifreq ifr;
+                        char *br, *brif;
+
+                        br = *(argv++);
+                        if (!*argv)
+                                bb_show_usage();
+                        brif = *(argv++);
+
+                        if (!(ifr.ifr_ifindex = if_nametoindex(brif))) {
+                                bb_perror_msg_and_die(info+11 BRCTL_VERBOSE(+3), brif);
+                        }
+                        safe_strncpy(ifr.ifr_name, br, IFNAMSIZ);
+                        if (ioctl(fd,
+                                          key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF, &ifr) < 0) {
+                                info[9 BRCTL_VERBOSE(+3)] = ',';
+                                bb_perror_msg_and_die (info, BRCTL_VERBOSE(op,) br, brif);
+                        }
+                }
+                if (ENABLE_FEATURE_CLEAN_UP)
+                        close(fd);
+        }
+        return EXIT_SUCCESS;
+}