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Apply option local port #222

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Aug 28, 2024
Merged

Apply option local port #222

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34 changes: 27 additions & 7 deletions tests/dtls-client.c
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Original file line number Diff line number Diff line change
Expand Up @@ -376,9 +376,11 @@ usage( const char *program, const char *version) {
#endif /* DTLS_PSK */
"\t-o file\t\toutput received data to this file\n"
"\t \t\t(use '-' for STDOUT)\n"
"\t-p port\t\tlisten on specified port (default is %d)\n"
"\t-p port\t\tlisten on specified port\n"
"\t \t\t(default is an ephemeral free port).\n"
"\t-r\t\tforce renegotiation info (RFC5746)\n"
"\t-v num\t\tverbosity level (default: 3)\n",
"\t-v num\t\tverbosity level (default: 3)\n"
"\tDefault destination port: %d\n",
DEFAULT_PORT);
}

Expand Down Expand Up @@ -412,21 +414,22 @@ main(int argc, char **argv) {
fd_set rfds, wfds;
struct timeval timeout;
unsigned short dst_port = 0;
unsigned short port = DEFAULT_PORT;
char port_str[NI_MAXSERV] = "0";
unsigned short local_port = 0;
log_t log_level = DTLS_LOG_WARN;
int fd;
ssize_t result;
int on = 1;
int opt, res;
session_t dst;
session_t listen;
char buf[200];
size_t len = 0;
int buf_ready = 0;

memset(&dst, 0, sizeof(session_t));
memset(&listen, 0, sizeof(session_t));

dtls_init();
snprintf(port_str, sizeof(port_str), "%d", port);

#ifdef DTLS_PSK
psk_id_length = strlen(PSK_DEFAULT_IDENTITY);
Expand Down Expand Up @@ -475,8 +478,7 @@ main(int argc, char **argv) {
}
break;
case 'p' :
strncpy(port_str, optarg, NI_MAXSERV-1);
port_str[NI_MAXSERV - 1] = '\0';
local_port = atoi(optarg);
break;
case 'r' :
force_renegotiation_info = 1;
Expand Down Expand Up @@ -561,6 +563,24 @@ main(int argc, char **argv) {
}
}

if (local_port) {
listen.addr = dst.addr;
listen.size = dst.size;
if (listen.addr.sa.sa_family == AF_INET6) {
listen.addr.sin6.sin6_addr = in6addr_any;
listen.addr.sin6.sin6_port = htons(local_port);
dtls_info("bind to local IPv6, port %u\n", local_port);
} else {
listen.addr.sin.sin_addr.s_addr = INADDR_ANY;
listen.addr.sin.sin_port = htons(local_port);
dtls_info("bind to local IPv4, port %u\n", local_port);
}
if (bind(fd, (struct sockaddr *)&listen.addr.sa, listen.size) < 0) {
dtls_alert("bind: %s\n", strerror(errno));
return EXIT_FAILURE;
}
}

if (signal(SIGINT, dtls_handle_signal) == SIG_ERR) {
dtls_alert("An error occurred while setting a signal handler.\n");
return EXIT_FAILURE;
Expand Down
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