Hmm! Getting somewhere maybe

include/patty/ax25.h

@@ -13,6 +13,9 @@
 
 #define PATTY_AX25_IF_OPT_TYPE_MASK 0x1f
 
+#define PATTY_AX25_IF_OPT_TYPE(n) \
+    ((n) & PATTY_AX25_IF_OPT_TYPE_MASK)
+
 enum patty_ax25_if_type {
     PATTY_AX25_IF_UNKNOWN       = 0x00,
     PATTY_AX25_IF_KISS_TNC_TTY  = 0x01,
@@ -40,8 +43,6 @@ typedef struct _patty_ax25_if {
     patty_kiss_tnc *  tnc;
     patty_ax25_stats  stats;
     patty_dict *      ports;
-
-    char name[8];
 } patty_ax25_if;
 
 typedef struct _patty_ax25 {
@@ -54,8 +55,7 @@ int patty_ax25_init(patty_ax25 *ax25);
 
 void patty_ax25_finish(patty_ax25 *ax25);
 
-int patty_ax25_create_if(patty_ax25 *ax25, const char *name,
+int patty_ax25_create_if(patty_ax25 *ax25, int opts, void *info);
-    int opts, void *info);
 
 int patty_ax25_each_if(patty_ax25 *ax25,
     int (*callback)(patty_ax25_if *, void *), void *ctx);

include/patty/kiss.h

@@ -8,6 +8,8 @@
 #define PATTY_KISS_TFEND 0xdc
 #define PATTY_KISS_TFESC 0xdd
 
+#define PATTY_KISS_BUFSZ 2048
+
 #define PATTY_KISS_COMMAND_PORT(cmd) \
     ((cmd & 0xf0) >> 4)
 

src/ax25.c

@@ -1,5 +1,9 @@
+#include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 
+#include <patty/dict.h>
+#include <patty/kiss.h>
 #include <patty/ax25.h>
 
 int patty_ax25_init(patty_ax25 *ax25) {
@@ -34,3 +38,46 @@ void patty_ax25_finish(patty_ax25 *ax25) {
     patty_dict_destroy(ax25->ports);
     patty_dict_destroy(ax25->ax25_ifs);
 }
+
+static int create_if_tnc(patty_ax25 *ax25, const char *device) {
+    patty_ax25_if *iface;
+
+    if ((iface = malloc(sizeof(*iface))) == NULL) {
+        goto error_malloc_iface;
+    }
+
+    memset(iface, '\0', sizeof(*iface));
+
+    if ((iface->ports = patty_dict_new()) == NULL) {
+        goto error_dict_new_ports;
+    }
+
+    if ((iface->tnc = patty_kiss_tnc_open(device, PATTY_KISS_BUFSZ)) == NULL) {
+        goto error_kiss_tnc_open;
+    }
+
+    return 0;
+
+error_kiss_tnc_open:
+    patty_dict_destroy(iface->ports);
+
+error_dict_new_ports:
+    free(iface);
+
+error_malloc_iface:
+    return -1;
+}
+
+int patty_ax25_create_if(patty_ax25 *ax25, int opts, void *info) {
+    switch (PATTY_AX25_IF_OPT_TYPE(opts)) {
+        case PATTY_AX25_IF_KISS_TNC_TTY: {
+            return create_if_tnc(ax25, (const char *)info);
+        }
+
+        default: break;
+    }
+
+    errno = EINVAL;
+
+    return -1;
+}

src/kiss.c

@@ -16,6 +16,8 @@ enum kiss_flags {
 };
 
 struct _patty_kiss_tnc {
+    const char * device;
+
     int    fd;
     int    dropped;
     void * frame;
@@ -44,6 +46,7 @@ patty_kiss_tnc *patty_kiss_tnc_open(const char *device, size_t bufsz) {
     }
 
     tnc->dropped = 0;
+    tnc->device  = device;
     tnc->bufsz   = bufsz;
     tnc->buflen  = 0;