[systemd-devel] [PATCH 28/28] dhcp: Use callback in test client

[Patrik Flykt]

Print out the event received and possibly also IP related data.
---
 src/dhcp/dhcp-example-client.c |   53 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/src/dhcp/dhcp-example-client.c b/src/dhcp/dhcp-example-client.c
index afb7102..3635bd8 100644
--- a/src/dhcp/dhcp-example-client.c
+++ b/src/dhcp/dhcp-example-client.c
@@ -24,6 +24,9 @@
 #include <unistd.h>
 #include <net/ethernet.h>
 #include <errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
 
 #include "client.h"
 
@@ -79,6 +82,52 @@ static int get_index(char *ifname)
         return ifr.ifr_ifindex;
 }
 
+static const char *print_event(int event)
+{
+        if (event < 0)
+                return strerror(-event);
+
+        switch (event) {
+        case DHCP_EVENT_STOP:
+                return "Stopped";
+        case DHCP_EVENT_NAK:
+                return "DHCP NAK";
+        case DHCP_EVENT_IP_ACQUIRE:
+                return "DHCP address acquired";
+        case DHCP_EVENT_IP_CHANGE:
+                return "DHCP address changed";
+        case DHCP_EVENT_EXPIRED:
+                return "DHCP lease expired";
+        default:
+                break;
+        }
+
+        return "unknown";
+}
+
+static void print_state(DHCPClient *client, int event, void *userdata)
+{
+        sd_event *e = userdata;
+        struct in_addr addr;
+
+        if (event < 0) {
+                printf("Error %d %s\n", event, print_event(event));
+                sd_event_unref(e);
+                return;
+        }
+
+        printf("Event %s\n", print_event(event));
+
+        if (dhcp_client_get_address(client, &addr) >= 0)
+                printf("Address %s\n", inet_ntoa(addr));
+
+        if (dhcp_client_get_netmask(client, &addr) >= 0)
+                printf("Netmask %s\n", inet_ntoa(addr));
+
+        if (dhcp_client_get_router(client, &addr) >= 0)
+                printf("Default router %s\n", inet_ntoa(addr));
+}
+
 int main(int argc, char **argv)
 {
         DHCPClient *client;
@@ -109,9 +158,13 @@ int main(int argc, char **argv)
         printf("Interface %s index %d\n", argv[1], index);
         dhcp_client_set_index(client, index);
         dhcp_client_set_mac(client, &mac);
+        dhcp_client_set_callback(client, print_state, &event);
 
         dhcp_client_start(client);
         sd_event_loop(event);
 
+        dhcp_client_free(client);
+        printf("Exit\n");
+
         return 0;
 }
-- 
1.7.10.4