Merge glorytunctl with glorytun and use argz

Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>

src/path.c

@@ -0,0 +1,88 @@
+#include "common.h"
+#include "ctl.h"
+#include "str.h"
+
+#include <stdio.h>
+#include <sys/socket.h>
+
+#include "../argz/argz.h"
+
+int
+gt_path(int argc, char **argv)
+{
+    const char *dev = "tun0";
+    const char *addr = NULL;
+
+    struct argz actionz[] = {
+        {NULL, "IPADDR", &addr, argz_str},
+        {}};
+
+    struct argz pathz[] = {
+        {"dev", "NAME", &dev, argz_str},
+        {"up|down", NULL, &actionz, argz_option},
+        {}};
+
+    if (argz(pathz, argc, argv))
+        return 1;
+
+    struct ctl_msg msg;
+
+    if (argz_is_set(pathz, "up")) {
+        gt_log("up\n");
+        msg = (struct ctl_msg){
+            .type = CTL_PATH_ADD,
+        };
+        str_cpy(msg.path.add.addr, sizeof(msg.path.add.addr) - 1, addr);
+    } else if (argz_is_set(pathz, "down")) {
+        gt_log("down\n");
+        msg = (struct ctl_msg){
+            .type = CTL_PATH_DEL,
+        };
+        str_cpy(msg.path.del.addr, sizeof(msg.path.del.addr) - 1, addr);
+    } else {
+        gt_log("nothing to do..\n");
+        return 0;
+    }
+
+    int ctl_fd = ctl_init("/run/" PACKAGE_NAME, "client");
+
+    if (ctl_fd == -1) {
+        perror("ctl_init");
+        return 1;
+    }
+
+    if (ctl_connect(ctl_fd, "/run/" PACKAGE_NAME, dev) == -1) {
+        gt_log("couldn't connect to %s\n", dev);
+        return 1;
+    }
+
+    if (send(ctl_fd, &msg, sizeof(msg), 0) == -1) {
+        perror("send");
+        return 1;
+    }
+
+    struct ctl_msg reply;
+
+    if (recv(ctl_fd, &reply, sizeof(reply), 0) == -1) {
+        perror("recv");
+        return 1;
+    }
+
+    switch (reply.type) {
+    case CTL_REPLY:
+        if (reply.reply) {
+            errno = reply.reply;
+            perror("error");
+        }
+        break;
+    case CTL_UNKNOWN:
+        printf("unknown command: %i\n", reply.unknown.type);
+        break;
+    default:
+        gt_log("bad reply from server: %i\n", reply.type);
+    }
+
+    close(ctl_fd);
+
+    return 0;
+}