--- gatchat/ppp_net.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/gatchat/ppp_net.c b/gatchat/ppp_net.c index c1f2eb4..fc1f9fb 100644 --- a/gatchat/ppp_net.c +++ b/gatchat/ppp_net.c @@ -50,10 +50,26 @@ struct ppp_net { void ppp_net_set_mtu(struct ppp_net *net, guint16 mtu) { + struct ifreq ifr; + int sock; + if (net == NULL) return; net->mtu = mtu; + + sock = socket(AF_INET, SOCK_DGRAM, 0); + if (sock < 0) + return; + + memset(&ifr, 0, sizeof(ifr)); + + strncpy(ifr.ifr_name, net->if_name, sizeof(ifr.ifr_name)); + ifr.ifr_mtu = mtu; + if (ioctl(sock, SIOCSIFMTU, (caddr_t) &ifr) < 0) + g_printerr("Unable to change MTU\n"); + + close(sock); } void ppp_net_process_packet(struct ppp_net *net, guint8 *packet) -- 1.6.6.1