aboutsummaryrefslogtreecommitdiff
path: root/user_server.c
diff options
context:
space:
mode:
authorToni Uhlig <matzeton@googlemail.com>2025-06-16 17:09:43 +0200
committerToni Uhlig <matzeton@googlemail.com>2025-06-18 15:16:30 +0200
commit0730e77eb4aa9841e90a17f190b9ae7d80565054 (patch)
treeb214414fb23070fcfcbfc880f78eb7b4cef987c8 /user_server.c
Initial commitmain
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
Diffstat (limited to 'user_server.c')
-rw-r--r--user_server.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/user_server.c b/user_server.c
new file mode 100644
index 0000000..de2054f
--- /dev/null
+++ b/user_server.c
@@ -0,0 +1,52 @@
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <strings.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "common.h"
+
+static const unsigned char payload_response[] = {PAYLOAD_RESPONSE};
+
+int main() {
+ unsigned char buffer[BUFSIZ];
+ int listenfd;
+ socklen_t len;
+ struct sockaddr_in servaddr = {};
+ struct sockaddr_in cliaddr;
+
+ listenfd = socket(AF_INET, SOCK_DGRAM, 0);
+ servaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+ servaddr.sin_port = htons(UDP_PORT);
+ servaddr.sin_family = AF_INET;
+
+ if (bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) != 0) {
+ perror("udp bind");
+ return 1;
+ }
+
+ size_t i;
+ ssize_t n;
+ for (i = 0; i < MAX_UDP_PACKETS; ++i) {
+ len = sizeof(cliaddr);
+ n = recvfrom(listenfd, buffer, sizeof(buffer), 0,
+ (struct sockaddr *)&cliaddr, &len);
+ if (n < 0) {
+ perror("udp recvfrom");
+ break;
+ }
+
+ n = sendto(listenfd, payload_response, sizeof(payload_response), 0,
+ (struct sockaddr *)&cliaddr, sizeof(cliaddr));
+ if (n < 0) {
+ perror("udp sendto");
+ break;
+ }
+ }
+
+ close(listenfd);
+
+ return !(i == MAX_UDP_PACKETS);
+}