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#ifndef UTILS_H
#define UTILS_H 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
struct cmd_options {
/* server: private key
* client: server public key
*/
char * key_string;
size_t key_length;
/* server: listen host
* client: remote host
*/
char * host;
/* server: listen port
* client: remote port
*/
int port;
/* server: path to write to, received from client via PDU-type DATA
* client: path to read from, send it via PDU-type DATA
*/
char * filepath;
};
__attribute__((noreturn)) static inline void usage(const char * const arg0)
{
fprintf(stderr, "usage: %s -k [SODIUM-KEY] -h [HOST] -p [PORT] -f [FILE]\n", arg0);
exit(EXIT_FAILURE);
}
static inline void parse_cmdline(struct cmd_options * const opts, int argc, char ** const argv)
{
int opt;
while ((opt = getopt(argc, argv, "k:h:p:f:h")) != -1) {
switch (opt) {
case 'k':
opts->key_string = strdup(optarg);
memset(optarg, '*', strlen(optarg));
break;
case 'h':
opts->host = strdup(optarg);
break;
case 'p':
opts->port = atoi(optarg); /* meh, strtol is king */
break;
case 'f':
opts->filepath = strdup(optarg);
break;
default:
usage(argv[0]);
}
}
if (opts->host == NULL) {
opts->host = strdup("127.0.0.1");
}
if (opts->port == 0) {
opts->port = 5555;
}
if (opts->key_string != NULL) {
opts->key_length = strlen(opts->key_string);
}
}
#endif
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