Get rid of FIELD_SIZE

Rename the last occurrences of FIELD_SIZE to OTP_SIZE, as it is
only being used to define the size of otp.

Keep the original value of 64 for now.

Author: DimitriPapadopoulos

src/config.c

@@ -268,8 +268,8 @@ int load_config(struct vpn_config *cfg, const char *filename)
 			cfg->password[PASSWORD_SIZE] = '\0';
 			cfg->password_set = 1;
 		} else if (strcmp(key, "otp") == 0) {
-			strncpy(cfg->otp, val, FIELD_SIZE);
-			cfg->otp[FIELD_SIZE] = '\0';
+			strncpy(cfg->otp, val, OTP_SIZE);
+			cfg->otp[OTP_SIZE] = '\0';
 		} else if (strcmp(key, "otp-prompt") == 0) {
 			free(cfg->otp_prompt);
 			cfg->otp_prompt = strdup(val);

src/config.h

@@ -58,10 +58,10 @@ struct x509_digest {
 	char data[SHA256STRLEN];
 };
 
-#define FIELD_SIZE	64
 #define GATEWAY_HOST_SIZE	253
 #define USERNAME_SIZE	64
 #define PASSWORD_SIZE	256
+#define OTP_SIZE	64
 #define REALM_SIZE	63
 
 /*
@@ -88,7 +88,7 @@ struct vpn_config {
 	char		username[USERNAME_SIZE + 1];
 	char		password[PASSWORD_SIZE + 1];
 	int		password_set;
-	char		otp[FIELD_SIZE + 1];
+	char		otp[OTP_SIZE + 1];
 	char		*otp_prompt;
 	unsigned int  otp_delay;
 	int         no_ftm_push;

src/http.c

@@ -584,7 +584,7 @@ static int try_otp_auth(struct tunnel *tunnel, const char *buffer,
 			v = NULL;
 			if (cfg->otp[0] == '\0') {
 				read_password(cfg->pinentry, "otp",
-				              p, cfg->otp, FIELD_SIZE);
+				              p, cfg->otp, OTP_SIZE);
 				if (cfg->otp[0] == '\0') {
 					log_error("No OTP specified\n");
 					return 0;
@@ -730,7 +730,7 @@ int auth_log_in(struct tunnel *tunnel)
 				// Prompt for 2FA token
 				read_password(cfg->pinentry, "2fa",
 				              "Two-factor authentication token: ",
-				              cfg->otp, FIELD_SIZE);
+				              cfg->otp, OTP_SIZE);
 
 				if (cfg->otp[0] == '\0') {
 					log_error("No token specified\n");

src/main.c

@@ -524,8 +524,8 @@ int main(int argc, char **argv)
 				*optarg++ = '*';  // nuke it
 			break;
 		case 'o':
-			strncpy(cli_cfg.otp, optarg, FIELD_SIZE);
-			cli_cfg.otp[FIELD_SIZE] = '\0';
+			strncpy(cli_cfg.otp, optarg, OTP_SIZE);
+			cli_cfg.otp[OTP_SIZE] = '\0';
 			break;
 		default:
 			goto user_error;

src/tunnel.c

@@ -45,7 +45,6 @@
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <ifaddrs.h>
-#include <net/if.h>
 #include <netdb.h>
 #if HAVE_PTY_H
 #include <pty.h>