remove OpenWRT-specific Makefile; move src/ to /

1 files changed, 65 insertions, 0 deletions

diff --git a/broadcaster.c b/broadcaster.c
new file mode 100644
index 0000000..66d6b58
--- /dev/null
+++ b/broadcaster.c
@@ -0,0 +1,65 @@
+/*
+** broadcaster.c -- a datagram "client" like talker.c, except
+**                  this one can broadcast
+*/
+
+#include "common.h"
+
+int main(int argc, char **argv)
+{
+    int fd;
+    struct sockaddr_in6 addr;
+    int broadcast = 1;
+
+    /* assemble packet, parse cmd line */
+    if (argc < 3 || argc > 4) {
+      fprintf(stderr, "usage: %s interface task [message|-]\n", argv[0]);
+      exit(1);
+    }
+    char buf[MAXBUFLEN],
+      *task = argv[2],
+      *message = (argc == 4) ? argv[3] : "";
+    int task_len = strlen(task),
+      total_len = task_len + 1;
+    strcpy(buf, task);
+    buf[task_len] = 0;
+    if (strcmp(message, "-") == 0) {
+      /* read payload from stdin */
+      int i;
+      while ((MAXBUFLEN - total_len - 1 > 0)
+	     && ((i = read(0, &(buf[total_len]), MAXBUFLEN - total_len - 1)) > 0))
+	total_len += i;
+      ENP(i, "read(stdin)");
+      if (read(0, &i, 1) != 0) {
+	fprintf(stderr, "payload to long: max %d bytes\n", MAXBUFLEN - 1);
+	exit(1);
+      }
+    }else{
+      /* use cmd line for payload */
+      total_len += strlen(message);
+      if (total_len <= MAXBUFLEN)
+	strcpy(buf + 1 + task_len, message);
+    }
+    if (total_len > MAXBUFLEN) {
+      fprintf(stderr,"payload to long: max %d bytes, was %d\n",
+	      MAXBUFLEN - 1, total_len);
+      exit(1);
+    }
+
+    /* setup socket */
+    ENP((fd = socket(AF_INET6, SOCK_DGRAM, 0)), "socket");
+    addr.sin6_family = AF_INET6;
+    addr.sin6_port = htons(SERVERPORT);
+    addr.sin6_flowinfo = 0;
+    inet_pton(AF_INET6, "ff02::1", &(addr.sin6_addr));
+    if ((addr.sin6_scope_id = if_nametoindex(argv[1])) == 0) {
+      fprintf(stderr, "interface not found\n");
+      exit(1);
+    }
+
+    /* send packet */
+    ENP(sendto(fd, buf, total_len, 0, (struct sockaddr *) &addr, sizeof addr), 
+	"sendto");
+
+    return 0;
+}