pimd: abstract addresses for IPv4/IPv6 PIM

Depending on whether we're compiling pimd or pim6d, these types take on
the appropriate AF being used.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/pimd/pim_addr.h b/pimd/pim_addr.h
new file mode 100644
index 0000000000..1e9da77779
--- /dev/null
+++ b/pimd/pim_addr.h
@@ -0,0 +1,63 @@
+/*
+ * PIM address generalizations
+ * Copyright (C) 2022  David Lamparter for NetDEF, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _PIMD_PIM_ADDR_H
+#define _PIMD_PIM_ADDR_H
+
+#include "jhash.h"
+
+#if PIM_IPV == 4
+typedef struct in_addr pim_addr;
+#define PIM_ADDRSTRLEN INET_ADDRSTRLEN
+#else
+typedef struct in6_addr pim_addr;
+#define PIM_ADDRSTRLEN INET6_ADDRSTRLEN
+#endif
+
+/* don't use this struct directly, use the pim_sgaddr typedef */
+struct _pim_sgaddr {
+	pim_addr grp;
+	pim_addr src;
+};
+
+typedef struct _pim_sgaddr pim_sgaddr;
+
+static inline int pim_sgaddr_cmp(const pim_sgaddr a, const pim_sgaddr b)
+{
+	/* memcmp over the entire struct = memcmp(grp) + memcmp(src) */
+	return memcmp(&a, &b, sizeof(a));
+}
+
+static inline uint32_t pim_sgaddr_hash(const pim_sgaddr a, uint32_t initval)
+{
+	return jhash2((uint32_t *)&a, sizeof(a) / sizeof(uint32_t), initval);
+}
+
+#ifdef _FRR_ATTRIBUTE_PRINTFRR
+#pragma FRR printfrr_ext "%pPA" (pim_addr *)
+#pragma FRR printfrr_ext "%pSG" (pim_sgaddr *)
+#endif
+
+/*
+ * There is no pim_sgaddr2str().  This is intentional.  Instead, use:
+ *	snprintfrr(buf, sizeof(buf), "%pPA", sgaddr)
+ * (and note that snprintfrr is implicit for vty_out and zlog_*)
+ */
+
+#endif /* _PIMD_PIM_ADDR_H */