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Fix lengths of interface names

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Use helper function similar to copy correctly limited names into
buffers.
This commit is contained in:
Petr Menšík
2018-08-15 18:17:00 +02:00
committed by Simon Kelley
parent 2b38e3823b
commit 47b45b2967
11 changed files with 44 additions and 26 deletions
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5
src/dhcp-common.c
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@@ -485,8 +485,11 @@ char *whichdevice(void)
void bindtodevice(char *device, int fd)
{
size_t len = strlen(device)+1;
if (len > IFNAMSIZ)
len = IFNAMSIZ;
/* only allowed by root. */
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, device, IFNAMSIZ) == -1 &&
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, device, len) == -1 &&
errno != EPERM)
die(_("failed to set SO_BINDTODEVICE on DHCP socket: %s"), NULL, EC_BADNET);
}