AX25: refactor in order to add the possibility to specify a path for

[bertos.git] / bertos / net / ax25.c

diff --git a/bertos/net/ax25.c b/bertos/net/ax25.c
index d2c2639b105805a79385722277cdf4081cf6618e..68a6ae56d777066356d1ce66bff0473d1a99f862 100644 (file)
--- a/bertos/net/ax25.c
+++ b/bertos/net/ax25.c
@@ -193,7 +193,7 @@ static void ax25_putchar(AX25Ctx *ctx, uint8_t c)
        kfile_putc(c, ctx->ch);
 }
 
-static void ax25_sendCall(AX25Ctx *ctx, const AX25Call *addr)
+static void ax25_sendCall(AX25Ctx *ctx, const AX25Call *addr, bool last)
 {
        unsigned len = MIN(sizeof(addr->call), strlen(addr->call));
 
@@ -209,30 +209,35 @@ static void ax25_sendCall(AX25Ctx *ctx, const AX25Call *addr)
        if (len < sizeof(addr->call))
                for (unsigned i = 0; i < sizeof(addr->call) - len; i++)
                        ax25_putchar(ctx, ' ' << 1);
+
+       /* The bit0 of last call SSID should be set to 1 */
+       uint8_t ssid = addr->ssid << 1 | (last ? 0x01 : 0);
+       ax25_putchar(ctx, ssid);
 }
 
 /**
- * Send an AX25 frame on the channel.
+ * Send an AX25 frame on the channel through a specific path.
  * \param ctx AX25 context to operate on.
- * \param dst the destination callsign for the frame, \see AX25_CALL
- *        for a handy way to create a callsign on the fly.
- * \param src the source callsign for the frame, \see AX25_CALL
- *        for a handy way to create a callsign on the fly.
+ * \param path An array of callsigns used as path, \see AX25_PATH for
+ *        an handy way to create a path.
+ * \param path_len callsigns path lenght.
  * \param _buf payload buffer.
  * \param len length of the payload.
  */
-void ax25_send(AX25Ctx *ctx, const AX25Call *dst, const AX25Call *src, const void *_buf, size_t len)
+void ax25_sendVia(AX25Ctx *ctx, const AX25Call *path, size_t path_len, const void *_buf, size_t len)
 {
        const uint8_t *buf = (const uint8_t *)_buf;
+       ASSERT(path);
+       ASSERT(path_len >= 2);
 
        ctx->crc_out = CRC_CCITT_INIT_VAL;
        kfile_putc(HDLC_FLAG, ctx->ch);
 
-       ax25_sendCall(ctx, dst);
-       ax25_putchar(ctx, dst->ssid << 1);
 
-       ax25_sendCall(ctx, src);
-       ax25_putchar(ctx, (src->ssid << 1) | 0x01);
+       /* Send call */
+       for (size_t i = 0; i < path_len; i++)
+               ax25_sendCall(ctx, &path[i], (i == path_len - 1));
+
        ax25_putchar(ctx, AX25_CTRL_UI);
        ax25_putchar(ctx, AX25_PID_NOLAYER3);