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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
commit | a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67 (patch) | |
tree | 8feaf1a1932871b139b3b30be4c09c66489918be /lib/mpls_ntop.c | |
parent | Initial commit. (diff) | |
download | iproute2-upstream/6.1.0.tar.xz iproute2-upstream/6.1.0.zip |
Adding upstream version 6.1.0.upstream/6.1.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/mpls_ntop.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/lib/mpls_ntop.c b/lib/mpls_ntop.c new file mode 100644 index 0000000..f8d89f4 --- /dev/null +++ b/lib/mpls_ntop.c @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include <errno.h> +#include <string.h> +#include <sys/types.h> +#include <netinet/in.h> +#include <linux/mpls.h> + +#include "utils.h" + +static const char *mpls_ntop1(const struct mpls_label *addr, char *buf, size_t buflen) +{ + size_t destlen = buflen; + char *dest = buf; + int count = 0; + + while (1) { + uint32_t entry = ntohl(addr[count++].entry); + uint32_t label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT; + int len = snprintf(dest, destlen, "%u", label); + + if (len >= destlen) + break; + + /* Is this the end? */ + if (entry & MPLS_LS_S_MASK) + return buf; + + dest += len; + destlen -= len; + if (destlen) { + *dest = '/'; + dest++; + destlen--; + } + } + errno = -E2BIG; + return NULL; +} + +const char *mpls_ntop(int af, const void *addr, char *buf, size_t buflen) +{ + switch(af) { + case AF_MPLS: + errno = 0; + return mpls_ntop1((struct mpls_label *)addr, buf, buflen); + default: + errno = EAFNOSUPPORT; + } + + return NULL; +} |