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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_client.c
Initial commitmain
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
Diffstat (limited to 'user_client.c')
-rw-r--r--user_client.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/user_client.c b/user_client.c
new file mode 100644
index 0000000..68c79af
--- /dev/null
+++ b/user_client.c
@@ -0,0 +1,85 @@
+// udp client driver program
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "common.h"
+
+static const unsigned char payload_request[] = { PAYLOAD_REQUEST, 0xFF};
+
+struct {
+ unsigned long long int send_start;
+ unsigned long long int received_end;
+} timings[MAX_UDP_PACKETS];
+
+static int set_ts(unsigned long long int * const out) {
+ struct timeval tv = {};
+
+ if (gettimeofday(&tv, NULL) != 0)
+ return 1;
+
+ *out = (tv.tv_sec * 1000 * 1000) + tv.tv_usec;
+ return 0;
+}
+
+int main() {
+ char buffer[BUFSIZ];
+ int sockfd;
+ struct sockaddr_in servaddr = {};
+
+ servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
+ servaddr.sin_port = htons(UDP_PORT);
+ servaddr.sin_family = AF_INET;
+ sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sockfd < 0) {
+ perror("udp socket");
+ return 1;
+ }
+
+ if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
+ perror("udp connect");
+ return 1;
+ }
+
+ size_t i;
+ ssize_t n;
+ for (i = 0; i < MAX_UDP_PACKETS; ++i) {
+ if (set_ts(&timings[i].send_start) != 0) {
+ n = -1;
+ break;
+ }
+
+ n = sendto(sockfd, payload_request, sizeof(payload_request), 0, NULL, 0);
+ if (n < 0) {
+ perror("udp sendto");
+ break;
+ }
+
+ n = recvfrom(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr *)NULL,
+ NULL);
+ if (n < 0) {
+ perror("udp recvfrom");
+ break;
+ }
+
+ if (set_ts(&timings[i].received_end) != 0) {
+ n = -1;
+ break;
+ }
+ }
+
+ close(sockfd);
+
+ printf("# packet_number rtt\n");
+ for (size_t i = 0; i < MAX_UDP_PACKETS; ++i) {
+ printf("%zu %lld\n", i, timings[i].received_end - timings[i].send_start);
+ }
+
+ return !(i == MAX_UDP_PACKETS);
+}