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Add some useless checks

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Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>
This commit is contained in:
Adrien Gallouët
2018-01-26 14:42:48 +00:00
parent dc9e19961a
commit f843b23365
6 changed files with 84 additions and 48 deletions
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13
src/iface.c
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@@ -1,10 +1,10 @@
#include "common.h"
#include "str.h"
#include "iface.h"
#include "str.h"
#include <sys/ioctl.h>
#include <net/if.h>
#include <sys/ioctl.h>
int
iface_set_mtu(char *dev_name, int mtu)
@@ -13,7 +13,14 @@ iface_set_mtu(char *dev_name, int mtu)
.ifr_mtu = mtu,
};
str_cpy(ifr.ifr_name, dev_name, IFNAMSIZ - 1);
const size_t len = sizeof(ifr.ifr_name) - 1;
if (str_cpy(ifr.ifr_name, len, dev_name) == len) {
if (str_len(dev_name, len + 1) > len) {
errno = EINTR;
return -1;
}
}
int fd = socket(AF_INET, SOCK_DGRAM, 0);