+-----------+--------------------------+----------------------------------------------+
| ``%pFX`` | ``struct bgp_dest *`` | ``fe80::1234/64`` (available in BGP only) |
+-----------+--------------------------+----------------------------------------------+
+| ``%.*pHX``| ``int len, void *ptr`` | ``12 34 56 78`` (hexdump) |
++-----------+--------------------------+----------------------------------------------+
Printf features like field lengths can be used normally with these extensions,
e.g. ``%-15pI4`` works correctly.
} \
/* end */
-/* fbuf helper functions */
+/* fbuf helper functions - note all 3 of these return the length that would
+ * be written regardless of how much space was available in the buffer, as
+ * needed for implementing printfrr extensions. (They also accept NULL buf
+ * for that.)
+ */
static inline ssize_t bputs(struct fbuf *buf, const char *str)
{
return 1;
}
+static inline ssize_t bputhex(struct fbuf *buf, uint8_t val)
+{
+ static const char hexch[] = "0123456789abcdef";
+
+ if (buf && buf->pos < buf->buf + buf->len)
+ *buf->pos++ = hexch[(val >> 4) & 0xf];
+ if (buf && buf->pos < buf->buf + buf->len)
+ *buf->pos++ = hexch[val & 0xf];
+ return 2;
+}
+
/* %pVA extension, equivalent to Linux kernel %pV */
struct va_format {
#ifdef _FRR_ATTRIBUTE_PRINTFRR
#pragma FRR printfrr_ext "%pFB" (struct fbuf *)
#pragma FRR printfrr_ext "%pVA" (struct va_format *)
+
+#pragma FRR printfrr_ext "%pHX" (signed char *)
+#pragma FRR printfrr_ext "%pHX" (unsigned char *)
+#pragma FRR printfrr_ext "%pHX" (void *)
+#pragma FRR printfrr_ext "%pHS" (signed char *)
+#pragma FRR printfrr_ext "%pHS" (unsigned char *)
+#pragma FRR printfrr_ext "%pHS" (void *)
#endif
/* when using non-ISO-C compatible extension specifiers... */
--- /dev/null
+/*
+ * Copyright (c) 2019 David Lamparter, for NetDEF, Inc.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+
+#include "printfrr.h"
+
+printfrr_ext_autoreg_p("HX", printfrr_hexdump)
+static ssize_t printfrr_hexdump(struct fbuf *buf, struct printfrr_eargs *ea,
+ const void *ptr)
+{
+ ssize_t ret = 0;
+ ssize_t input_len = printfrr_ext_len(ea);
+ char sep = ' ';
+ const uint8_t *pos, *end;
+
+ if (ea->fmt[0] == 'c') {
+ ea->fmt++;
+ sep = ':';
+ } else if (ea->fmt[0] == 'n') {
+ ea->fmt++;
+ sep = '\0';
+ }
+
+ if (input_len < 0)
+ return 0;
+
+ for (pos = ptr, end = pos + input_len; pos < end; pos++) {
+ if (sep && pos != ptr)
+ ret += bputch(buf, sep);
+ ret += bputhex(buf, *pos);
+ }
+
+ return ret;
+}
+
+/* string analog for hexdumps / the "this." in ("74 68 69 73 0a |this.|") */
+
+printfrr_ext_autoreg_p("HS", printfrr_hexdstr)
+static ssize_t printfrr_hexdstr(struct fbuf *buf, struct printfrr_eargs *ea,
+ const void *ptr)
+{
+ ssize_t ret = 0;
+ ssize_t input_len = printfrr_ext_len(ea);
+ const uint8_t *pos, *end;
+
+ if (input_len < 0)
+ return 0;
+
+ for (pos = ptr, end = pos + input_len; pos < end; pos++) {
+ if (*pos >= 0x20 && *pos < 0x7f)
+ ret += bputch(buf, *pos);
+ else
+ ret += bputch(buf, '.');
+ }
+
+ return ret;
+}
lib/spf_backoff.c \
lib/srcdest_table.c \
lib/stream.c \
+ lib/strformat.c \
lib/strlcat.c \
lib/strlcpy.c \
lib/systemd.c \
sg.src.s_addr = INADDR_ANY;
printchk("(*,224.1.2.3)", "%pSG4", &sg);
+ uint8_t randhex[] = { 0x12, 0x34, 0x00, 0xca, 0xfe, 0x00, 0xaa, 0x55 };
+
+ printchk("12 34 00 ca fe 00 aa 55", "%.8pHX", randhex);
+ printchk("12 34 00 ca fe 00 aa 55", "%.*pHX",
+ (int)sizeof(randhex), randhex);
+ printchk("12 34 00 ca", "%.4pHX", randhex);
+
+ printchk("12:34:00:ca:fe:00:aa:55", "%.8pHXc", randhex);
+ printchk("123400cafe00aa55", "%.8pHXn", randhex);
+
return !!errors;
}