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wolfssl-examples
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Rename udp_connect to udp_create_socket 

During the resumed (second) DTLS connection, read any server data that
arrives during the handshake and print it. This adds a memset and
wolfSSL_read into recvBuf and prints when len > 0.
pull/530/head
Juliusz Sosinowicz 2025-11-21 13:55:59 +01:00
parent dd8f171609
commit 0516999449
1 changed files with 10 additions and 3 deletions
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13
dtls/client-dtls13-earlydata.c
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@ -45,7 +45,7 @@
#define DATA_MSG "Normal data hello from early data DTLS client!"
#define DATA_MSG_LEN (sizeof(DATA_MSG))
static int udp_connect(const char* ip, int port, struct sockaddr_in* servAddr) {
static int udp_create_socket(const char* ip, int port, struct sockaddr_in* servAddr) {
int sockfd;
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
@ -105,7 +105,7 @@ int main(int argc, char** argv)
}
/* === 1st connection: perform handshake and get session ticket === */
sockfd = udp_connect(server_ip, DEFAULT_PORT, &servAddr);
sockfd = udp_create_socket(server_ip, DEFAULT_PORT, &servAddr);
if (sockfd < 0) goto cleanup;
ssl = wolfSSL_new(ctx);
@ -150,7 +150,7 @@ int main(int argc, char** argv)
sockfd = -1;
/* === 2nd connection: resume session and send early data === */
sockfd = udp_connect(server_ip, DEFAULT_PORT, &servAddr);
sockfd = udp_create_socket(server_ip, DEFAULT_PORT, &servAddr);
if (sockfd < 0) goto cleanup;
ssl = wolfSSL_new(ctx);
@ -183,6 +183,13 @@ int main(int argc, char** argv)
fprintf(stderr, "wolfSSL_connect (2nd) failed\n");
goto cleanup;
}
else {
memset(recvBuf, 0, sizeof(recvBuf));
len = wolfSSL_read(ssl, recvBuf, sizeof(recvBuf) - 1);
if (len > 0) {
printf("Server sent during handshake: %s\n", recvBuf);
}
}
}
printf("Handshake complete after early data.\n");