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Fall back to non-promiscous mode on error

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This commit is contained in:
Joseph C. Lehner 2022-07-09 14:38:14 +02:00
parent 784536c410
commit 36900f298b
1 changed files with 16 additions and 5 deletions
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15
ethsock.c
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@ -599,6 +599,7 @@ struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
struct ethsock *sock;
bool is_bridge = false;
int err;
int promisc;
#ifdef NMRPFLASH_WINDOWS
intf = intf_name_to_wpcap(intf);
@ -616,11 +617,21 @@ struct ethsock *ethsock_create(const char *intf, uint16_t protocol)
buf[0] = '\0';
sock->intf = intf;
sock->pcap = pcap_open_live(sock->intf, BUFSIZ, 1, 1, buf);
promisc = true;
do {
sock->pcap = pcap_open_live(sock->intf, BUFSIZ, promisc, 1, buf);
if (!sock->pcap) {
fprintf(stderr, "%s.\n", buf);
if (!promisc) {
fprintf(stderr, "Error: %s.\n", buf);
goto cleanup;
} else {
fprintf(stderr, "Warning: failed to enable promiscous mode.\n");
promisc = false;
continue;
}
}
} while (!sock->pcap);
if (*buf) {
fprintf(stderr, "Warning: %s.\n", buf);