Promote netsat, and move ifconfig, netcat, and rfkill to new toys/net directory.

5 files changed, 1233 insertions, 0 deletions

diff --git a/toys/net/README b/toys/net/README
new file mode 100644
index 00000000..8708e4b5
--- /dev/null
+++ b/toys/net/README
@@ -0,0 +1 @@
+Networking
diff --git a/toys/net/ifconfig.c b/toys/net/ifconfig.c
new file mode 100644
index 00000000..1d2a41dc
--- /dev/null
+++ b/toys/net/ifconfig.c
@@ -0,0 +1,517 @@
+/* ifconfig.c - Configure network interface.
+ *
+ * Copyright 2012 Ranjan Kumar <ranjankumar.bth@gmail.com>
+ * Copyright 2012 Kyungwan Han <asura321@gamil.com>
+ * Reviewed by Kyungsu Kim <kaspyx@gmail.com>
+ *
+ * Not in SUSv4.
+
+USE_IFCONFIG(NEWTOY(ifconfig, "^?a", TOYFLAG_SBIN))
+
+config IFCONFIG
+  bool "ifconfig"
+  default y
+  help
+    usage: ifconfig [-a] [INTERFACE [ACTION...]]
+
+    Display or configure network interface.
+
+    With no arguments, display active interfaces. First argument is interface
+    to operate on, one argument by itself displays that interface.
+
+    -a	Show all interfaces, not just active ones
+
+    Additional arguments are actions to perform on the interface:
+
+    ADDRESS[/NETMASK] - set IPv4 address (1.2.3.4/5)
+    default - unset ipv4 address
+    add|del ADDRESS[/PREFIXLEN] - add/remove IPv6 address (1111::8888/128)
+    up - enable interface
+    down - disable interface
+
+    netmask|broadcast|pointopoint ADDRESS - set more IPv4 characteristics
+    hw ether|infiniband ADDRESS - set LAN hardware address (AA:BB:CC...)
+    txqueuelen LEN - number of buffered packets before output blocks
+    mtu LEN - size of outgoing packets (Maximum Transmission Unit)
+
+    Flags you can set on an interface (or -remove by prefixing with -):
+    arp - don't use Address Resolution Protocol to map LAN routes
+    promisc - don't discard packets that aren't to this LAN hardware address
+    multicast - force interface into multicast mode if the driver doesn't
+    allmulti - promisc for multicast packets
+
+    Obsolete fields included for historical purposes:
+    irq|io_addr|mem_start ADDR - micromanage obsolete hardware
+    outfill|keepalive INTEGER - SLIP analog dialup line quality monitoring
+    metric INTEGER - added to Linux 0.9.10 with comment "never used", still true
+*/
+
+#define FOR_ifconfig
+#include "toys.h"
+
+#include <net/if_arp.h>
+#include <net/ethernet.h>
+
+GLOBALS(
+  int sockfd;
+)
+
+// Convert hostname to binary address for AF_INET or AF_INET6
+// return /prefix (or range max if none)
+int get_addrinfo(char *host, sa_family_t af, void *addr)
+{
+  struct addrinfo hints, *result, *rp = 0;
+  int status, len;
+  char *from, *slash;
+
+  memset(&hints, 0 , sizeof(struct addrinfo));
+  hints.ai_family = af;
+  hints.ai_socktype = SOCK_STREAM;
+
+  slash = strchr(host, '/');
+  if (slash) *slash = 0;
+
+  status = getaddrinfo(host, NULL, &hints, &result);
+  if (!status)
+    for (rp = result; rp; rp = rp->ai_next)
+      if (rp->ai_family == af) break;
+  if (!rp) error_exit("bad address '%s' : %s", host, gai_strerror(status));
+
+  // ai_addr isn't struct in_addr or in6_addr, it's struct sockaddr. Of course.
+  // You'd think ipv4 and ipv6 would have some basic compatibility, but no.
+  from = ((char *)rp->ai_addr) + 4;
+  if (af == AF_INET6) {
+    len = 16;
+    from += 4;  // skip "flowinfo" field ipv6 puts before address
+  } else len = 4;
+  memcpy(addr, from, len);
+  freeaddrinfo(result);
+
+  len = -1;
+  if (slash) len = atolx_range(slash+1, 0, (af == AF_INET) ? 32 : 128);
+
+  return len;
+}
+
+static void display_ifconfig(char *name, int always, unsigned long long val[])
+{
+  struct ifreq ifre;
+  struct {
+    int type;
+    char *title;
+  } types[] = {
+    {ARPHRD_LOOPBACK, "Local Loopback"}, {ARPHRD_ETHER, "Ethernet"},
+    {ARPHRD_PPP, "Point-to-Point Protocol"}, {ARPHRD_INFINIBAND, "InfiniBand"},
+    {ARPHRD_SIT, "IPv6-in-IPv4"}, {-1, "UNSPEC"}
+  };
+  int i;
+  char *pp;
+  FILE *fp;
+  short flags;
+
+  xstrncpy(ifre.ifr_name, name, IFNAMSIZ);
+  if (ioctl(TT.sockfd, SIOCGIFFLAGS, &ifre)<0) perror_exit_raw(name);
+  flags = ifre.ifr_flags;
+  if (!always && !(flags & IFF_UP)) return;
+
+  // query hardware type and hardware address
+  i = ioctl(TT.sockfd, SIOCGIFHWADDR, &ifre);
+
+  for (i=0; i < (sizeof(types)/sizeof(*types))-1; i++)
+    if (ifre.ifr_hwaddr.sa_family == types[i].type) break;
+
+  xprintf("%-9s Link encap:%s  ", name, types[i].title);
+  if(i >= 0 && ifre.ifr_hwaddr.sa_family == ARPHRD_ETHER) {
+    xprintf("HWaddr ");
+    for (i=0; i<6; i++) xprintf(":%02x"+!i, ifre.ifr_hwaddr.sa_data[i]);
+  }
+  xputc('\n');
+
+  // If an address is assigned record that.
+
+  ifre.ifr_addr.sa_family = AF_INET;
+  memset(&ifre.ifr_addr, 0, sizeof(ifre.ifr_addr));
+  ioctl(TT.sockfd, SIOCGIFADDR, &ifre);
+  pp = (char *)&ifre.ifr_addr;
+  for (i = 0; i<sizeof(ifre.ifr_addr); i++) if (pp[i]) break;
+
+  if (i != sizeof(ifre.ifr_addr)) {
+    struct sockaddr_in *si = (struct sockaddr_in *)&ifre.ifr_addr;
+    struct {
+      char *name;
+      int flag, ioctl;
+    } addr[] = {
+      {"addr", 0, 0},
+      {"P-t-P", IFF_POINTOPOINT, SIOCGIFDSTADDR},
+      {"Bcast", IFF_BROADCAST, SIOCGIFBRDADDR},
+      {"Mask", 0, SIOCGIFNETMASK}
+    };
+
+    xprintf("%10c%s", ' ', (si->sin_family == AF_INET) ? "inet" :
+        (si->sin_family == AF_INET6) ? "inet6" : "unspec");
+
+    for (i=0; i < sizeof(addr)/sizeof(*addr); i++) {
+      if (!addr[i].flag || (flags & addr[i].flag)) {
+        if (addr[i].ioctl && ioctl(TT.sockfd, addr[i].ioctl, &ifre))
+          si->sin_family = 0;
+        xprintf(" %s:%s ", addr[i].name,
+          (si->sin_family == 0xFFFF || !si->sin_family)
+            ? "[NOT SET]" : inet_ntoa(si->sin_addr));
+      }
+    }
+
+    xputc('\n');
+  }
+
+  fp = fopen(pp = "/proc/net/if_inet6", "r");
+  if (fp) {
+    char iface_name[IFNAMSIZ];
+    int plen, iscope;
+
+    while (fgets(toybuf, sizeof(toybuf), fp)) {
+      int nitems;
+      char ipv6_addr[40];
+
+      nitems = sscanf(toybuf, "%32s %*08x %02x %02x %*02x %15s\n",
+                      ipv6_addr, &plen, &iscope, iface_name);
+      if (nitems<0 && feof(fp)) break;
+      if (nitems != 4) perror_exit("bad %s", pp);
+
+      if (!strcmp(name, iface_name)) {
+        struct sockaddr_in6 s6;
+        char *ptr = ipv6_addr+sizeof(ipv6_addr)-1;
+
+        // convert giant hex string into colon-spearated ipv6 address by
+        // inserting ':' every 4 characters. 
+        for (i = 32; i; i--)
+          if ((*(ptr--) = ipv6_addr[i])) if (!(i&3)) *(ptr--) = ':';
+
+        // Convert to binary and back to get abbreviated :: version
+        if (inet_pton(AF_INET6, ipv6_addr, (void *)&s6.sin6_addr) > 0) {
+          if (inet_ntop(AF_INET6, &s6.sin6_addr, toybuf, sizeof(toybuf))) {
+            char *scopes[] = {"Global","Host","Link","Site","Compat"},
+                 *scope = "Unknown";
+
+            for (i=0; i < sizeof(scopes)/sizeof(*scopes); i++)
+              if (iscope == (!!i)<<(i+3)) scope = scopes[i];
+            xprintf("%10cinet6 addr: %s/%d Scope: %s\n",
+                    ' ', toybuf, plen, scope);
+          }
+        }
+      }
+    }
+    fclose(fp);
+  }
+
+  xprintf("%10c", ' ');
+
+  if (flags) {
+    unsigned short mask = 1;
+    char **s, *str[] = {
+      "UP", "BROADCAST", "DEBUG", "LOOPBACK", "POINTOPOINT", "NOTRAILERS",
+      "RUNNING", "NOARP", "PROMISC", "ALLMULTI", "MASTER", "SLAVE", "MULTICAST",
+      "PORTSEL", "AUTOMEDIA", "DYNAMIC", NULL
+    };
+
+    for (s = str; *s; s++) {
+      if (flags & mask) xprintf("%s ", *s);
+      mask = mask << 1;
+    }
+  } else xprintf("[NO FLAGS] ");
+
+  if (ioctl(TT.sockfd, SIOCGIFMTU, &ifre) < 0) ifre.ifr_mtu = 0;
+  xprintf(" MTU:%d", ifre.ifr_mtu);
+  if (ioctl(TT.sockfd, SIOCGIFMETRIC, &ifre) < 0) ifre.ifr_metric = 0;
+  if (!ifre.ifr_metric) ifre.ifr_metric = 1;
+  xprintf("  Metric:%d", ifre.ifr_metric);
+
+  // non-virtual interface
+
+  if (val) {
+    char *label[] = {"RX bytes", "RX packets", "errors", "dropped", "overruns",
+      "frame", 0, 0, "TX bytes", "TX packets", "errors", "dropped", "overruns",
+      "collisions", "carrier", 0, "txqueuelen"};
+    signed char order[] = {-1, 1, 2, 3, 4, 5, -1, 9, 10, 11, 12, 14, -1,
+      13, 16, -1, 0, 8};
+    int i;
+
+    // Query txqueuelen
+    if (ioctl(TT.sockfd, SIOCGIFTXQLEN, &ifre) >= 0) val[16] = ifre.ifr_qlen;
+    else val[16] = -1;
+
+    for (i = 0; i < sizeof(order); i++) {
+      int j = order[i];
+
+      if (j < 0) xprintf("\n%10c", ' ');
+      else xprintf("%s:%llu ", label[j], val[j]);
+    }
+  }
+  xputc('\n');
+
+  if(!ioctl(TT.sockfd, SIOCGIFMAP, &ifre) && (ifre.ifr_map.irq ||
+      ifre.ifr_map.mem_start || ifre.ifr_map.dma || ifre.ifr_map.base_addr))
+  {
+    xprintf("%10c", ' ');
+    if(ifre.ifr_map.irq) xprintf("Interrupt:%d ", ifre.ifr_map.irq);
+    if(ifre.ifr_map.base_addr >= 0x100) // IO_MAP_INDEX
+      xprintf("Base address:0x%x ", ifre.ifr_map.base_addr);
+    if(ifre.ifr_map.mem_start)
+      xprintf("Memory:%lx-%lx ", ifre.ifr_map.mem_start, ifre.ifr_map.mem_end);
+    if(ifre.ifr_map.dma) xprintf("DMA chan:%x ", ifre.ifr_map.dma);
+    xputc('\n');
+  }
+  xputc('\n');
+}
+
+static void show_iface(char *iface_name)
+{
+  char *name;
+  struct string_list *ifaces = 0, *sl;
+  int i, j;
+  FILE *fp;
+
+  fp = xfopen("/proc/net/dev", "r");
+
+  for (i=0; fgets(toybuf, sizeof(toybuf), fp); i++) {
+    char *buf = toybuf;
+    unsigned long long val[17];
+
+    if (i<2) continue;
+
+    while (isspace(*buf)) buf++;
+    name = strsep(&buf, ":");
+    if(!buf) error_exit("bad name %s", name);
+
+    errno = 0;
+    for (j=0; j<16 && !errno; j++) val[j] = strtoll(buf, &buf, 0);
+    if (errno) perror_exit("bad %s at %s", name, buf);
+
+    if (iface_name) {
+      if (!strcmp(iface_name, name)) {
+        display_ifconfig(iface_name, 1, val);
+
+        return;
+      }
+    } else {
+      sl = xmalloc(sizeof(*sl)+strlen(name)+1);
+      strcpy(sl->str, name);
+      sl->next = ifaces;
+      ifaces = sl;
+
+      display_ifconfig(sl->str, toys.optflags & FLAG_a, val);
+    }
+  }
+  fclose(fp);
+
+  if (iface_name) display_ifconfig(iface_name, 1, 0);
+  else {
+    struct ifconf ifcon;
+    struct ifreq *ifre;
+    int num;
+
+    // Loop until buffer's big enough
+    ifcon.ifc_buf = NULL;
+    for (num = 30;;num += 10) {
+      ifcon.ifc_len = sizeof(struct ifreq)*num;
+      ifcon.ifc_buf = xrealloc(ifcon.ifc_buf, ifcon.ifc_len);
+      xioctl(TT.sockfd, SIOCGIFCONF, &ifcon);
+      if (ifcon.ifc_len != sizeof(struct ifreq)*num) break;
+    }
+
+    ifre = ifcon.ifc_req;
+    for(num = 0; num < ifcon.ifc_len && ifre; num += sizeof(struct ifreq), ifre++)
+    {
+      // Skip duplicates
+      for(sl = ifaces; sl; sl = sl->next)
+        if(!strcmp(sl->str, ifre->ifr_name)) break;
+
+      if(!sl) display_ifconfig(ifre->ifr_name, toys.optflags & FLAG_a, 0);
+    }
+
+    free(ifcon.ifc_buf);
+  }
+
+  llist_traverse(ifaces, free);
+}
+
+// Encode offset and size of field into an int, and make result negative
+#define IFREQ_OFFSZ(x) -(int)((offsetof(struct ifreq, x)<<16) + sizeof(ifre.x))
+
+void ifconfig_main(void)
+{
+  char **argv = toys.optargs;
+  struct ifreq ifre;
+  int i;
+
+  TT.sockfd = xsocket(AF_INET, SOCK_DGRAM, 0);
+  if(toys.optc < 2) {
+    show_iface(*argv);
+    return;
+  }
+
+  // Open interface
+  memset(&ifre, 0, sizeof(struct ifreq));
+  xstrncpy(ifre.ifr_name, *argv, IFNAMSIZ);
+
+  // Perform operations on interface
+  while(*++argv) {
+    // Table of known operations
+    struct argh {
+      char *name;
+      int on, off; // set, clear
+    } try[] = {
+      {0, IFF_UP|IFF_RUNNING, SIOCSIFADDR},
+      {"up", IFF_UP|IFF_RUNNING, 0},
+      {"down", 0, IFF_UP},
+      {"arp", 0, IFF_NOARP},
+      {"promisc", IFF_PROMISC, 0},
+      {"allmulti", IFF_ALLMULTI, 0},
+      {"multicast", IFF_MULTICAST, 0},
+      {"pointopoint", IFF_POINTOPOINT, SIOCSIFDSTADDR},
+      {"broadcast", IFF_BROADCAST, SIOCSIFBRDADDR},
+      {"netmask", 0, SIOCSIFNETMASK},
+      {"dstaddr", 0, SIOCSIFDSTADDR},
+      {"mtu", IFREQ_OFFSZ(ifr_mtu), SIOCSIFMTU},
+      {"keepalive", IFREQ_OFFSZ(ifr_data), SIOCDEVPRIVATE}, // SIOCSKEEPALIVE
+      {"outfill", IFREQ_OFFSZ(ifr_data), SIOCDEVPRIVATE+2}, // SIOCSOUTFILL
+      {"metric", IFREQ_OFFSZ(ifr_metric), SIOCSIFMETRIC},
+      {"txqueuelen", IFREQ_OFFSZ(ifr_qlen), SIOCSIFTXQLEN},
+      {"mem_start", IFREQ_OFFSZ(ifr_map.mem_start), SIOCSIFMAP},
+      {"io_addr", IFREQ_OFFSZ(ifr_map.base_addr), SIOCSIFMAP},
+      {"irq", IFREQ_OFFSZ(ifr_map.irq), SIOCSIFMAP},
+      {"inet", 0, 0},
+      {"inet6", 0, 0}
+    };
+    char *s = *argv;
+    int rev = (*s == '-');
+
+    s += rev;
+
+    // "set hardware address" is oddball enough to special case
+    if (!strcmp(*argv, "hw")) {
+      char *hw_addr, *ptr, *p;
+      struct sockaddr *sock = &ifre.ifr_hwaddr;
+      int count = 6;
+
+      ptr = p = (char *)sock->sa_data;
+      memset(sock, 0, sizeof(struct sockaddr));
+      if (argv[1]) {
+        if (!strcmp("ether", *++argv)) sock->sa_family = ARPHRD_ETHER;
+        else if (!strcmp("infiniband", *argv)) {
+          sock->sa_family = ARPHRD_INFINIBAND;
+          count = 20;
+          p = ptr = toybuf;
+        }
+      }
+      if (!sock->sa_family || !argv[1]) help_exit("bad hw '%s'", *argv);
+      hw_addr = *++argv;
+
+      // Parse and verify address.
+      while (*hw_addr && (p-ptr) < count) {
+        int val, len = 0;
+
+        if (*hw_addr == ':') hw_addr++;
+        sscanf(hw_addr, "%2x%n", &val, &len);
+        if (!len || len > 2) break; // 1 nibble can be set e.g. C2:79:38:95:D:A 
+        hw_addr += len;
+        *p++ = val;
+      }
+
+      if ((p-ptr) != count || *hw_addr)
+        error_exit("bad hw-addr '%s'", *argv);
+
+      // the linux kernel's "struct sockaddr" (include/linux/socket.h in the
+      // kernel source) only has 14 bytes of sa_data, and an infiniband address
+      // is 20. So if we go through the ioctl, the kernel will truncate
+      // infiniband addresses, meaning we have to go through sysfs instead.
+      if (sock->sa_family == ARPHRD_INFINIBAND && !strchr(ifre.ifr_name, '/')) {
+        int fd;
+
+        sprintf(toybuf, "/sys/class/net/%s/address", ifre.ifr_name);
+        fd = xopen(toybuf, O_RDWR);
+        xwrite(fd, *argv, strlen(*argv));
+        close(fd);
+      } else xioctl(TT.sockfd, SIOCSIFHWADDR, &ifre);
+      continue;
+
+    // Add/remove ipv6 address to interface
+
+    } else if (!strcmp(*argv, "add") || !strcmp(*argv, "del")) {
+      struct ifreq_inet6 {
+        struct in6_addr addr;
+        unsigned prefix;
+        int index;
+      } ifre6;
+      int plen, fd6 = xsocket(AF_INET6, SOCK_DGRAM, 0);
+
+      if (!argv[1]) help_exit("%s", *argv);
+
+      plen = get_addrinfo(argv[1], AF_INET6, &ifre6.addr);
+      if (plen < 0) plen = 128;
+      xioctl(fd6, SIOCGIFINDEX, &ifre);
+      ifre6.index = ifre.ifr_ifindex;
+      ifre6.prefix = plen;
+      xioctl(fd6, **(argv++)=='a' ? SIOCSIFADDR : SIOCDIFADDR, &ifre6);
+
+      close(fd6);
+      continue;
+    // Iterate through table to find/perform operation
+    } else for (i = 0; i < ARRAY_LEN(try); i++) {
+      struct argh *t = try+i;
+      int on = t->on, off = t->off;
+
+      if (!t->name) {
+        if (isdigit(**argv) || !strcmp(*argv, "default")) argv--;
+        else continue;
+      } else if (strcmp(t->name, s)) continue;
+
+      // Is this an SIOCSI entry?
+      if ((off|0xff) == 0x89ff) {
+        if (!rev) {
+          if (!*++argv) error_exit("%s needs argument", t->name);
+
+          // Assign value to ifre field and call ioctl? (via IFREQ_OFFSZ.)
+          if (on < 0) {
+            long l = strtoul(*argv, 0, 0);
+
+            if (off == SIOCSIFMAP) xioctl(TT.sockfd, SIOCGIFMAP, &ifre);
+            on = -on;
+            poke((on>>16) + (char *)&ifre, l, on&15);
+            xioctl(TT.sockfd, off, &ifre);
+            break;
+          } else {
+            struct sockaddr_in *si = (struct sockaddr_in *)&ifre.ifr_addr;
+            int mask = -1;
+
+            si->sin_family = AF_INET;
+
+            if (!strcmp(*argv, "default")) si->sin_addr.s_addr = INADDR_ANY;
+            else mask = get_addrinfo(*argv, AF_INET, &si->sin_addr);
+            xioctl(TT.sockfd, off, &ifre);
+
+            // Handle /netmask
+            if (mask >= 0) {
+              // sin_addr probably isn't unaligned, but just in case...
+              mask = htonl((~0)<<(32-mask));
+              memcpy(&si->sin_addr, &mask, 4);
+              xioctl(TT.sockfd, SIOCSIFNETMASK, &ifre);
+            }
+          }
+        }
+        off = 0;
+      }
+
+      // Set flags
+      if (on || off) {
+        xioctl(TT.sockfd, SIOCGIFFLAGS, &ifre);
+        ifre.ifr_flags &= ~(rev ? on : off);
+        ifre.ifr_flags |= (rev ? off : on);
+        xioctl(TT.sockfd, SIOCSIFFLAGS, &ifre);
+      }
+
+      break;
+    }
+    if (i == sizeof(try)/sizeof(*try)) help_exit("bad argument '%s'", *argv);
+  }
+  close(TT.sockfd);
+}
diff --git a/toys/net/netcat.c b/toys/net/netcat.c
new file mode 100644
index 00000000..1c75eb26
--- /dev/null
+++ b/toys/net/netcat.c
@@ -0,0 +1,230 @@
+/* netcat.c - Forward stdin/stdout to a file or network connection.
+ *
+ * Copyright 2007 Rob Landley <rob@landley.net>
+ *
+ * TODO: udp, ipv6, genericize for telnet/microcom/tail-f
+
+USE_NETCAT(OLDTOY(nc, netcat, TOYFLAG_USR|TOYFLAG_BIN))
+USE_NETCAT(NEWTOY(netcat, USE_NETCAT_LISTEN("^tlL")"w#p#s:q#f:", TOYFLAG_BIN))
+
+config NETCAT
+  bool "netcat"
+  default y
+  help
+    usage: netcat [-u] [-wpq #] [-s addr] {IPADDR PORTNUM|-f FILENAME}
+
+    -f	use FILENAME (ala /dev/ttyS0) instead of network
+    -p	local port number
+    -q	SECONDS quit this many seconds after EOF on stdin.
+    -s	local ipv4 address
+    -w	SECONDS timeout for connection
+
+    Use "stty 115200 -F /dev/ttyS0 && stty raw -echo -ctlecho" with
+    netcat -f to connect to a serial port.
+
+config NETCAT_LISTEN
+  bool "netcat server options (-let)"
+  default y
+  depends on NETCAT
+  depends on TOYBOX_FORK
+  help
+    usage: netcat [-lL COMMAND...]
+
+    -l	listen for one incoming connection.
+    -L	listen for multiple incoming connections (server mode).
+
+    The command line after -l or -L is executed to handle each incoming
+    connection. If none, the connection is forwarded to stdin/stdout.
+
+    For a quick-and-dirty server, try something like:
+    netcat -s 127.0.0.1 -p 1234 -tL /bin/bash -l
+
+config NETCAT_LISTEN_TTY
+  bool
+  default y
+  depends on NETCAT_LISTEN
+  depends on TOYBOX_FORK
+  help
+    usage: netcat [-t]
+
+    -t	allocate tty (must come before -l or -L)
+*/
+
+#define FOR_netcat
+#include "toys.h"
+
+GLOBALS(
+  char *filename;        // -f read from filename instead of network
+  long quit_delay;       // -q Exit after EOF from stdin after # seconds.
+  char *source_address;  // -s Bind to a specific source address.
+  long port;             // -p Bind to a specific source port.
+  long wait;             // -w Wait # seconds for a connection.
+)
+
+static void timeout(int signum)
+{
+  if (TT.wait) error_exit("Timeout");
+  // This should be xexit() but would need siglongjmp()...
+  exit(0);
+}
+
+static void set_alarm(int seconds)
+{
+  xsignal(SIGALRM, seconds ? timeout : SIG_DFL);
+  alarm(seconds);
+}
+
+// Translate x.x.x.x numeric IPv4 address, or else DNS lookup an IPv4 name.
+static void lookup_name(char *name, uint32_t *result)
+{
+  struct hostent *hostbyname;
+
+  hostbyname = gethostbyname(name); // getaddrinfo
+  if (!hostbyname) error_exit("no host '%s'", name);
+  *result = *(uint32_t *)*hostbyname->h_addr_list;
+}
+
+// Worry about a fancy lookup later.
+static void lookup_port(char *str, uint16_t *port)
+{
+  *port = SWAP_BE16(atoi(str));
+}
+
+void netcat_main(void)
+{
+  int sockfd=-1, pollcount=2;
+  struct pollfd pollfds[2];
+
+  memset(pollfds, 0, 2*sizeof(struct pollfd));
+  pollfds[0].events = pollfds[1].events = POLLIN;
+  set_alarm(TT.wait);
+
+  // The argument parsing logic can't make "<2" conditional on other
+  // arguments like -f and -l, so we do it by hand here.
+  if ((toys.optflags&FLAG_f) ? toys.optc :
+      (!(toys.optflags&(FLAG_l|FLAG_L)) && toys.optc!=2))
+        help_exit("Argument count wrong");
+
+  if (TT.filename) pollfds[0].fd = xopen(TT.filename, O_RDWR);
+  else {
+    int temp;
+    struct sockaddr_in address;
+
+    // Setup socket
+    sockfd = xsocket(AF_INET, SOCK_STREAM, 0);
+    fcntl(sockfd, F_SETFD, FD_CLOEXEC);
+    temp = 1;
+    setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &temp, sizeof(temp));
+    memset(&address, 0, sizeof(address));
+    address.sin_family = AF_INET;
+    if (TT.source_address || TT.port) {
+      address.sin_port = SWAP_BE16(TT.port);
+      if (TT.source_address)
+        lookup_name(TT.source_address, (uint32_t *)&address.sin_addr);
+      if (bind(sockfd, (struct sockaddr *)&address, sizeof(address)))
+        perror_exit("bind");
+    }
+
+    // Dial out
+
+    if (!CFG_NETCAT_LISTEN || !(toys.optflags&(FLAG_L|FLAG_l))) {
+      // Figure out where to dial out to.
+      lookup_name(*toys.optargs, (uint32_t *)&address.sin_addr);
+      lookup_port(toys.optargs[1], &address.sin_port);
+      temp = connect(sockfd, (struct sockaddr *)&address, sizeof(address));
+      if (temp<0) perror_exit("connect");
+      pollfds[0].fd = sockfd;
+
+    // Listen for incoming connections
+
+    } else {
+      socklen_t len = sizeof(address);
+
+      if (listen(sockfd, 5)) error_exit("listen");
+      if (!TT.port) {
+        getsockname(sockfd, (struct sockaddr *)&address, &len);
+        printf("%d\n", SWAP_BE16(address.sin_port));
+        fflush(stdout);
+      }
+      // Do we need to return immediately because -l has arguments?
+
+      if ((toys.optflags & FLAG_l) && toys.optc) {
+        if (CFG_TOYBOX_FORK && xfork()) goto cleanup;
+        close(0);
+        close(1);
+        close(2);
+      }
+
+      for (;;) {
+        pid_t child = 0;
+
+        // For -l, call accept from the _new_ process.
+
+        pollfds[0].fd = accept(sockfd, (struct sockaddr *)&address, &len);
+        if (pollfds[0].fd<0) perror_exit("accept");
+
+        // Do we need a tty?
+
+        if (toys.optflags&FLAG_t)
+          child = forkpty(&(pollfds[1].fd), NULL, NULL, NULL);
+
+        // Do we need to fork and/or redirect for exec?
+
+        else {
+          if (toys.optflags&FLAG_L) {
+            toys.stacktop = 0;
+            child = vfork();
+          }
+          if (!child && toys.optc) {
+            int fd = pollfds[0].fd;
+
+            dup2(fd, 0);
+            dup2(fd, 1);
+            if (toys.optflags&FLAG_L) dup2(fd, 2);
+            if (fd>2) close(fd);
+          }
+        }
+
+        if (child<0) error_msg("Fork failed\n");
+        if (child<1) break;
+        close(pollfds[0].fd);
+      }
+    }
+  }
+
+  // We have a connection.  Disarm timeout.
+  // (Does not play well with -L, but what _should_ that do?)
+  set_alarm(0);
+
+  if (CFG_NETCAT_LISTEN && ((toys.optflags&(FLAG_L|FLAG_l)) && toys.optc))
+    xexec(toys.optargs);
+
+  // Poll loop copying stdin->socket and socket->stdout.
+  for (;;) {
+    int i;
+
+    if (0>poll(pollfds, pollcount, -1)) perror_exit("poll");
+
+    for (i=0; i<pollcount; i++) {
+      if (pollfds[i].revents & POLLIN) {
+        int len = read(pollfds[i].fd, toybuf, sizeof(toybuf));
+        if (len<1) goto dohupnow;
+        xwrite(i ? pollfds[0].fd : 1, toybuf, len);
+      } else if (pollfds[i].revents & POLLHUP) {
+dohupnow:
+        // Close half-connection.  This is needed for things like
+        // "echo GET / | netcat landley.net 80"
+        if (i) {
+          shutdown(pollfds[0].fd, SHUT_WR);
+          pollcount--;
+          set_alarm(TT.quit_delay);
+        } else goto cleanup;
+      }
+    }
+  }
+cleanup:
+  if (CFG_TOYBOX_FREE) {
+    close(pollfds[0].fd);
+    close(sockfd);
+  }
+}
diff --git a/toys/net/netstat.c b/toys/net/netstat.c
new file mode 100644
index 00000000..4e5c884e
--- /dev/null
+++ b/toys/net/netstat.c
@@ -0,0 +1,383 @@
+/* netstat.c - Display Linux networking subsystem.
+ *
+ * Copyright 2012 Ranjan Kumar <ranjankumar.bth@gmail.com>
+ * Copyright 2013 Kyungwan Han <asura321@gmail.com>
+ *
+ * Not in SUSv4.
+ *
+USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal", TOYFLAG_BIN))
+config NETSTAT
+  bool "netstat"
+  default y
+  help
+    usage: netstat [-pWrxwutneal]
+
+    Display networking information. Default is netsat -tuwx
+
+    -r  routing table
+    -a  all sockets (not just connected)
+    -l  listening server sockets
+    -t  TCP sockets
+    -u  UDP sockets
+    -w  raw sockets
+    -x  unix sockets
+    -e  extended info
+    -n  don't resolve names
+    -W  wide display
+    -p  PID/Program name of sockets
+*/
+
+#define FOR_netstat
+#include "toys.h"
+#include <net/route.h>
+
+GLOBALS(
+  struct num_cache *inodes;
+  int wpad;
+);
+
+// convert address into text format.
+static void addr2str(int af, void *addr, unsigned port, char *buf, int len,
+  char *proto)
+{
+  int pos, count;
+  struct servent *ser = 0;
+
+  // Convert to numeric address
+  if (!inet_ntop(af, addr, buf, 256)) {
+    *buf = 0;
+
+    return;
+  }
+  buf[len] = 0;
+  pos = strlen(buf);
+
+  // If there's no port number, it's a local :* binding, nothing to look up.
+  if (!port) {
+    if (len-pos<2) pos = len-2;
+    strcpy(buf+pos, ":*");
+
+    return;
+  }
+
+  if (!(toys.optflags & FLAG_n)) {
+    struct addrinfo hints, *result, *rp;
+    char cut[4];
+
+    memset(&hints, 0, sizeof(struct addrinfo));
+    hints.ai_family = af;
+
+    if (!getaddrinfo(buf, NULL, &hints, &result)) {
+      socklen_t sock_len = (af == AF_INET) ? sizeof(struct sockaddr_in)
+        : sizeof(struct sockaddr_in6);
+
+      // We assume that a failing getnameinfo dosn't stomp "buf" here.
+      for (rp = result; rp; rp = rp->ai_next)
+        if (!getnameinfo(rp->ai_addr, sock_len, buf, 256, 0, 0, 0)) break;
+      freeaddrinfo(result);
+      buf[len] = 0;
+      pos = strlen(buf);
+    }
+
+    // Doesn't understand proto "tcp6", so truncate
+    memcpy(cut, proto, 3);
+    cut[3] = 0;
+    ser = getservbyport(htons(port), cut);
+  }
+
+  // Append :service
+  count = snprintf(0, 0, ":%u", port);
+  if (ser) {
+    count = snprintf(0, 0, ":%s", ser->s_name);
+    // sheer paranoia
+    if (count>=len) {
+      count = len-1;
+      ser->s_name[count] = 0;
+    }
+  }
+  if (len-pos<count) pos = len-count;
+  if (ser) sprintf(buf+pos, ":%s", ser->s_name);
+  else sprintf(buf+pos, ":%u", port);
+}
+
+// Display info for tcp/udp/raw
+static void show_ip(char *fname)
+{
+  char *ss_state = "UNKNOWN", buf[12], *s, *label = strrchr(fname, '/')+1;
+  char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1",
+                         "FIN_WAIT2", "TIME_WAIT", "CLOSE", "CLOSE_WAIT",
+                         "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"};
+  struct passwd *pw;
+  FILE *fp = fopen(fname, "r");
+
+  if (!fp) {
+     perror_msg("'%s'", fname);
+     return;
+  }
+
+  if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
+
+  while (fgets(toybuf, sizeof(toybuf), fp)) {
+    char lip[256], rip[256];
+    union {
+      struct {unsigned u; unsigned char b[4];} i4;
+      struct {struct {unsigned a, b, c, d;} u; unsigned char b[16];} i6;
+    } laddr, raddr;
+    unsigned lport, rport, state, txq, rxq, num, uid, nitems;
+    unsigned long inode;
+
+    // Try ipv6, then try ipv4
+    nitems = sscanf(toybuf,
+      " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
+      &num, &laddr.i6.u.a, &laddr.i6.u.b, &laddr.i6.u.c,
+      &laddr.i6.u.d, &lport, &raddr.i6.u.a, &raddr.i6.u.b,
+      &raddr.i6.u.c, &raddr.i6.u.d, &rport, &state, &txq, &rxq,
+      &uid, &inode);
+
+    if (nitems!=16) {
+      nitems = sscanf(toybuf,
+        " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
+        &num, &laddr.i4.u, &lport, &raddr.i4.u, &rport, &state, &txq,
+        &rxq, &uid, &inode);
+
+      if (nitems!=10) continue;
+      nitems = AF_INET;
+    } else nitems = AF_INET6;
+
+    // Should we display this? (listening or all or TCP/UDP/RAW)
+    if (!((toys.optflags & FLAG_l) && (!rport && (state & 0xA)))
+      && !(toys.optflags & FLAG_a) && !(rport & (0x10 | 0x20 | 0x40)))
+        continue;
+
+    addr2str(nitems, &laddr, lport, lip, TT.wpad, label);
+    addr2str(nitems, &raddr, rport, rip, TT.wpad, label);
+
+    // Display data
+    s = label;
+    if (strstart(&s, "tcp")) {
+      int sz = ARRAY_LEN(state_label);
+      if (!state || state >= sz) state = sz-1;
+      ss_state = state_label[state];
+    } else if (strstart(&s, "udp")) {
+      if (state == 1) ss_state = state_label[state];
+      else if (state == 7) ss_state = "";
+    } else if (strstart(&s, "raw")) sprintf(ss_state = buf, "%u", state);
+
+    if (!(toys.optflags & FLAG_n) && (pw = bufgetpwuid(uid)))
+      snprintf(toybuf, sizeof(toybuf), "%s", pw->pw_name);
+    else snprintf(toybuf, sizeof(toybuf), "%d", uid);
+
+    printf("%-6s%6d%7d ", label, rxq, txq);
+    printf("%*.*s %*.*s ", -TT.wpad, TT.wpad, lip, -TT.wpad, TT.wpad, rip);
+    printf("%-11s", ss_state);
+    if ((toys.optflags & FLAG_e)) printf(" %-10s %-11ld", toybuf, inode);
+    if ((toys.optflags & FLAG_p)) {
+      struct num_cache *nc = get_num_cache(TT.inodes, inode);
+
+      printf(" %s", nc ? nc->data : "-");
+    }
+    xputc('\n');
+  }
+  fclose(fp);
+}
+
+static void show_unix_sockets(void)
+{
+  char *types[] = {"","STREAM","DGRAM","RAW","RDM","SEQPACKET","DCCP","PACKET"},
+       *states[] = {"","LISTENING","CONNECTING","CONNECTED","DISCONNECTING"},
+       *s, *ss;
+  unsigned long refcount, flags, type, state, inode;
+  FILE *fp = xfopen("/proc/net/unix", "r");
+
+  if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
+
+  while (fgets(toybuf, sizeof(toybuf), fp)) {
+    unsigned offset = 0;
+
+    // count = 6 or 7 (first field ignored, sockets don't always have filenames)
+    if (6<sscanf(toybuf, "%*p: %lX %*X %lX %lX %lX %lu %n",
+      &refcount, &flags, &type, &state, &inode, &offset))
+        continue;
+
+    // Linux exports only SO_ACCEPTCON since 2.3.15pre3 in 1999, but let's
+    // filter in case they add more someday.
+    flags &= 1<<16;
+
+    // Only show unconnected listening sockets with -a
+    if (state==1 && flags && !(toys.optflags&FLAG_a)) continue;
+
+    if (type==10) type = 7; // move SOCK_PACKET into line
+    if (type>ARRAY_LEN(types)) type = 0;
+    if (state>ARRAY_LEN(states) || (state==1 && !flags)) state = 0;
+    sprintf(toybuf, "[ %s]", flags ? "ACC " : "");
+
+    printf("unix  %-6ld %-11s %-10s %-13s %8lu ",
+      refcount, toybuf, types[type], states[state], inode);
+    if (toys.optflags & FLAG_p) {
+      struct num_cache *nc = get_num_cache(TT.inodes, inode);
+
+      printf("%-19.19s", nc ? nc->data : "-");
+    }
+
+    if (offset) {
+      if ((ss = strrchr(s = toybuf+offset, '\n'))) *ss = 0;
+      printf("%s", s);
+    }
+    xputc('\n');
+  }
+
+  fclose(fp);
+}
+
+static int scan_pids(struct dirtree *node)
+{
+  char *s = toybuf+256;
+  struct dirent *entry;
+  DIR *dp;
+  int pid, dirfd;
+
+  if (!node->parent) return DIRTREE_RECURSE;
+  if (!(pid = atol(node->name))) return 0;
+
+  sprintf(toybuf, "/proc/%d/cmdline", pid);
+  if (!(readfile(toybuf, toybuf, 256))) return 0;
+
+  sprintf(s, "%d/fd", pid);
+  if (-1==(dirfd = openat(dirtree_parentfd(node), s, O_RDONLY))) return 0;
+  if (!(dp = fdopendir(dirfd))) {
+    close(dirfd);
+
+    return 0;
+  }
+
+  while ((entry = readdir(dp))) {
+    s = toybuf+256;
+    if (!readlinkat0(dirfd, entry->d_name, s, sizeof(toybuf)-256)) continue;
+    // Can the "[0000]:" happen in a modern kernel?
+    if (strstart(&s, "socket:[") || strstart(&s, "[0000]:")) {
+      long long ll = atoll(s);
+
+      sprintf(s, "%d/%s", pid, getbasename(toybuf));
+      add_num_cache(&TT.inodes, ll, s, strlen(s)+1);
+    }
+  }
+  closedir(dp);
+
+  return 0;
+}
+
+/*
+ * extract inet4 route info from /proc/net/route file and display it.
+ */
+static void display_routes(void)
+{
+  static const char flagchars[] = "GHRDMDAC";
+  static const unsigned flagarray[] = {
+    RTF_GATEWAY, RTF_HOST, RTF_REINSTATE, RTF_DYNAMIC, RTF_MODIFIED
+  };
+  unsigned long dest, gate, mask;
+  int flags, ref, use, metric, mss, win, irtt;
+  char *out = toybuf, *flag_val;
+  char iface[64]={0};
+  FILE *fp = xfopen("/proc/net/route", "r");
+
+  if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
+
+  printf("Kernel IP routing table\n"
+          "Destination\tGateway \tGenmask \tFlags %s Iface\n",
+          !(toys.optflags&FLAG_e) ? "  MSS Window  irtt" : "Metric Ref    Use");
+
+  while (fgets(toybuf, sizeof(toybuf), fp)) {
+     char *destip = 0, *gateip = 0, *maskip = 0;
+
+     if (11 != sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d", iface, &dest,
+       &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt))
+         break;
+
+    // skip down interfaces.
+    if (!(flags & RTF_UP)) continue;
+
+// TODO /proc/net/ipv6_route
+
+    if (dest) {
+      if (inet_ntop(AF_INET, &dest, out, 16)) destip = out;
+    } else destip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "default";
+    out += 16;
+
+    if (gate) {
+      if (inet_ntop(AF_INET, &gate, out, 16)) gateip = out;
+    } else gateip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "*";
+    out += 16;
+
+// TODO /24
+    //For Mask
+    if (inet_ntop(AF_INET, &mask, out, 16)) maskip = out;
+    else maskip = "?";
+    out += 16;
+
+    //Get flag Values
+    flag_val = out;
+    *out++ = 'U';
+    for (dest = 0; dest < ARRAY_LEN(flagarray); dest++)
+      if (flags&flagarray[dest]) *out++ = flagchars[dest];
+    *out = 0;
+    if (flags & RTF_REJECT) *flag_val = '!';
+
+    printf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val);
+    if (!(toys.optflags & FLAG_e))
+      printf("%5d %-5d %6d %s\n", mss, win, irtt, iface);
+    else printf("%-6d %-2d %7d %s\n", metric, ref, use, iface);
+  }
+
+  fclose(fp);
+}
+
+void netstat_main(void)
+{
+  int tuwx = FLAG_t|FLAG_u|FLAG_w|FLAG_x;
+  char *type = "w/o";
+
+  TT.wpad = (toys.optflags&FLAG_W) ? 51 : 23;
+  if (!(toys.optflags&(FLAG_r|tuwx))) toys.optflags |= tuwx;
+  if (toys.optflags & FLAG_r) display_routes();
+  if (!(toys.optflags&tuwx)) return;
+
+  if (toys.optflags & FLAG_a) type = "established and";
+  else if (toys.optflags & FLAG_l) type = "only";
+
+  if (toys.optflags & FLAG_p) dirtree_read("/proc", scan_pids);
+
+  if (toys.optflags&(FLAG_t|FLAG_u|FLAG_w)) {
+    printf("Active %s (%s servers)\n", "Internet connections", type);
+    printf("Proto Recv-Q Send-Q %*s %*s State      ", -TT.wpad, "Local Address",
+      -TT.wpad, "Foreign Address");
+    if (toys.optflags & FLAG_e) printf(" User       Inode      ");
+    if (toys.optflags & FLAG_p) printf(" PID/Program Name");
+    xputc('\n');
+
+    if (toys.optflags & FLAG_t) {
+      show_ip("/proc/net/tcp");
+      show_ip("/proc/net/tcp6");
+    }
+    if (toys.optflags & FLAG_u) {
+      show_ip("/proc/net/udp");
+      show_ip("/proc/net/udp6");
+    }
+    if (toys.optflags & FLAG_w) {
+      show_ip("/proc/net/raw");
+      show_ip("/proc/net/raw6");
+    }
+  }
+
+  if (toys.optflags & FLAG_x) {
+    printf("Active %s (%s servers)\n", "UNIX domain sockets", type);
+
+    printf("Proto RefCnt Flags\t Type\t    State\t    %s Path\n",
+      (toys.optflags&FLAG_p) ? "PID/Program Name" : "I-Node");
+    show_unix_sockets();
+  }
+
+  if ((toys.optflags & FLAG_p) && CFG_TOYBOX_FREE)
+    llist_traverse(TT.inodes, free);
+  toys.exitval = 0;
+}
diff --git a/toys/net/rfkill.c b/toys/net/rfkill.c
new file mode 100644
index 00000000..36fe320d
--- /dev/null
+++ b/toys/net/rfkill.c
@@ -0,0 +1,102 @@
+/* rfkill.c - Enable/disable wireless devices.
+ *
+ * Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
+ * Copyright 2014 Kyungwan Han <asura321@gmail.com>
+ *
+ * No Standard
+
+USE_RFKILL(NEWTOY(rfkill, "<1>2", TOYFLAG_USR|TOYFLAG_SBIN))
+
+config RFKILL
+  bool "rfkill"
+  default y
+  help
+    Usage: rfkill COMMAND [DEVICE]
+
+    Enable/disable wireless devices.
+
+    Commands:
+    list [DEVICE]   List current state
+    block DEVICE    Disable device
+    unblock DEVICE  Enable device
+
+    DEVICE is an index number, or one of:
+    all, wlan(wifi), bluetooth, uwb(ultrawideband), wimax, wwan, gps, fm.
+*/
+
+#define FOR_rfkill
+#include "toys.h"
+#include <linux/rfkill.h>
+
+void rfkill_main(void)
+{
+  struct rfkill_event rfevent;
+  int fd, tvar, idx = -1, tid = RFKILL_TYPE_ALL;
+  char **optargs = toys.optargs;
+
+  // Parse command line options
+  for (tvar = 0; tvar < 3; tvar++)
+    if (!strcmp((char *[]){"list", "block", "unblock"}[tvar], *optargs)) break;
+  if (tvar == 3) error_exit("unknown cmd '%s'", *optargs);
+  if (tvar) {
+    int i;
+    struct arglist {
+      char *name;
+      int idx;
+    } rftypes[] = {{"all", RFKILL_TYPE_ALL}, {"wifi", RFKILL_TYPE_WLAN},
+      {"wlan", RFKILL_TYPE_WLAN}, {"bluetooth", RFKILL_TYPE_BLUETOOTH},
+      {"uwb", RFKILL_TYPE_UWB}, {"ultrawideband", RFKILL_TYPE_UWB},
+      {"wimax", RFKILL_TYPE_WIMAX}, {"wwan", RFKILL_TYPE_WWAN},
+      {"gps", RFKILL_TYPE_GPS}, {"fm", 7}}; // RFKILL_TYPE_FM = 7
+
+    if (!*++optargs) error_exit("'%s' needs IDENTIFIER", optargs[-1]);
+    for (i = 0; i < ARRAY_LEN(rftypes); i++)
+      if (!strcmp(rftypes[i].name, *optargs)) break;
+    if (i == ARRAY_LEN(rftypes)) idx = atolx_range(*optargs, 0, INT_MAX);
+    else tid = rftypes[i].idx;
+  }
+
+  // Perform requested action
+  fd = xopen("/dev/rfkill", (tvar ? O_RDWR : O_RDONLY)|O_NONBLOCK);
+  if (tvar) {
+    // block/unblock
+    memset(&rfevent, 0, sizeof(rfevent));
+    rfevent.soft = tvar == 1;
+    if (idx >= 0) {
+      rfevent.idx = idx;
+      rfevent.op = RFKILL_OP_CHANGE;
+    } else {
+      rfevent.type = tid;
+      rfevent.op = RFKILL_OP_CHANGE_ALL;
+    }
+    xwrite(fd, &rfevent, sizeof(rfevent));
+  } else {
+    // show list.
+    while (sizeof(rfevent) == readall(fd, &rfevent, sizeof(rfevent))) {
+      char *line, *name = 0, *type = 0;
+
+      // filter list items
+      if ((tid > 0 && tid != rfevent.type) || (idx != -1 && idx != rfevent.idx))
+        continue;
+
+      sprintf(toybuf, "/sys/class/rfkill/rfkill%u/uevent", rfevent.idx);
+      tvar = xopen(toybuf, O_RDONLY);
+      while ((line = get_line(tvar))) {
+        char *s = line;
+
+        if (strstart(&s, "RFKILL_NAME=")) name = xstrdup(s);
+        else if (strstart(&s, "RFKILL_TYPE=")) type = xstrdup(s);
+
+        free(line);
+      }
+      xclose(tvar);
+
+      xprintf("%u: %s: %s\n", rfevent.idx, name, type);
+      xprintf("\tSoft blocked: %s\n", rfevent.soft ? "yes" : "no");
+      xprintf("\tHard blocked: %s\n", rfevent.hard ? "yes" : "no");
+      free(name);
+      free(type);
+    }
+  }
+  xclose(fd);
+}