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From c50aab5f23535ea7f3ef004910465e7054931199 Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Sun, 15 Dec 2019 23:01:54 +0900
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Subject: [PATCH] util: introduce ifname_valid_full()
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(cherry picked from commit 4252696aec9ec038ff312a164e25f039da25126f)
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Related: #1850986
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---
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src/basic/socket-util.c | 12 +++++++++---
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src/basic/socket-util.h | 5 ++++-
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src/test/test-socket-util.c | 1 +
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3 files changed, 14 insertions(+), 4 deletions(-)
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diff --git a/src/basic/socket-util.c b/src/basic/socket-util.c
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index 053bcba670..7f8066123b 100644
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--- a/src/basic/socket-util.c
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+++ b/src/basic/socket-util.c
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@@ -13,6 +13,7 @@
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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+#include <linux/if.h>
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#include "alloc-util.h"
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#include "fd-util.h"
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@@ -868,7 +869,7 @@ static const char* const ip_tos_table[] = {
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DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff);
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-bool ifname_valid(const char *p) {
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+bool ifname_valid_full(const char *p, bool alternative) {
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bool numeric = true;
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/* Checks whether a network interface name is valid. This is inspired by dev_valid_name() in the kernel sources
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@@ -878,8 +879,13 @@ bool ifname_valid(const char *p) {
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if (isempty(p))
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return false;
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- if (strlen(p) >= IFNAMSIZ)
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- return false;
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+ if (alternative) {
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+ if (strlen(p) >= ALTIFNAMSIZ)
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+ return false;
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+ } else {
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+ if (strlen(p) >= IFNAMSIZ)
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+ return false;
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+ }
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if (dot_or_dot_dot(p))
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return false;
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diff --git a/src/basic/socket-util.h b/src/basic/socket-util.h
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index c7c9ad34d6..30baba6c03 100644
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--- a/src/basic/socket-util.h
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+++ b/src/basic/socket-util.h
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@@ -123,7 +123,10 @@ int fd_inc_rcvbuf(int fd, size_t n);
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int ip_tos_to_string_alloc(int i, char **s);
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int ip_tos_from_string(const char *s);
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-bool ifname_valid(const char *p);
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+bool ifname_valid_full(const char *p, bool alternative);
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+static inline bool ifname_valid(const char *p) {
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+ return ifname_valid_full(p, false);
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+}
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bool address_label_valid(const char *p);
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int getpeercred(int fd, struct ucred *ucred);
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diff --git a/src/test/test-socket-util.c b/src/test/test-socket-util.c
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index 19c5395b92..c545622c09 100644
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--- a/src/test/test-socket-util.c
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+++ b/src/test/test-socket-util.c
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@@ -39,6 +39,7 @@ static void test_ifname_valid(void) {
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assert(ifname_valid("xxxxxxxxxxxxxxx"));
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assert(!ifname_valid("xxxxxxxxxxxxxxxx"));
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+ assert(ifname_valid_full("xxxxxxxxxxxxxxxx", true));
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}
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static void test_socket_address_parse(void) {
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