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Also try SOCK_RAW/IPPROTO_ICMP when other fail.

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Under Linux Vserver SOCK_RAW is quite limited. Only IPPROTO_ICMP works,
so try to use it.

check_length_order() also doesn't work because sendto is also limited.
Fortunately under linux check_length_order is not needed as described
in comment around check_length_order.
This commit is contained in:
Arkadiusz Miśkiewicz 2018-06-05 15:54:44 +02:00
parent d2fe63fb77
commit 455ad8a2b1
1 changed files with 10 additions and 1 deletions
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11
packet/probe_unix.c
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@ -128,6 +128,12 @@ void check_length_order(
ssize_t bytes_sent;
int packet_size;
#ifdef __linux__
/* Linux will accept either byte order and check below fails to work
* in some cases due to sendto() returning EPERM. */
return;
#endif
memset(&param, 0, sizeof(struct probe_param_t));
param.ip_version = 4;
param.protocol = IPPROTO_ICMP;
@ -230,7 +236,10 @@ int open_ip4_sockets_raw(
send_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
if (send_socket == -1) {
return -1;
send_socket = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
if (send_socket == -1) {
return -1;
}
}
/*