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Imported Upstream version 1.3.1~svn3789

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root 2012-07-21 05:14:09 +00:00
parent ce56f3183d
commit d869f11566
24 changed files with 420 additions and 456 deletions
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18
tuntap_linux.c
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@ -1,5 +1,5 @@
/*
* (C) 2007-08 - Luca Deri <deri@ntop.org>
* (C) 2007-09 - Luca Deri <deri@ntop.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -42,6 +42,7 @@ static void read_mac(char *ifname, char *mac_addr) {
}
/* ********************************** */
/** @brief Open and configure the TAP device for packet read/write.
*
* This routine creates the interface via the tuntap driver then uses ifconfig
@ -52,6 +53,7 @@ static void read_mac(char *ifname, char *mac_addr) {
* if NULL system will assign a name
* @param device_ip - address of iface
* @param device_mask - netmask for device_ip
* @param mtu - MTU for device_ip
*
* @return - negative value on error
* - non-negative file-descriptor on success
@ -60,7 +62,8 @@ int tuntap_open(tuntap_dev *device,
char *dev, /* user-definable interface name, eg. edge0 */
char *device_ip,
char *device_mask,
const char * device_mac ) {
const char * device_mac,
int mtu) {
char *tuntap_device = "/dev/net/tun";
#define N2N_LINUX_SYSTEMCMD_SIZE 128
char buf[N2N_LINUX_SYSTEMCMD_SIZE];
@ -69,7 +72,7 @@ int tuntap_open(tuntap_dev *device,
device->fd = open(tuntap_device, O_RDWR);
if(device->fd < 0) {
printf("ERROR: ioctl() [%s][%d]\n", strerror(errno), rc);
printf("ERROR: ioctl() [%s][%d]\n", strerror(errno), errno);
return -1;
}
@ -84,10 +87,6 @@ int tuntap_open(tuntap_dev *device,
return -1;
}
/* REVISIT: BbMja7: MTU should be related to MTU of the interface the tuntap
* is built on. The value 1400 assumes an eth iface with MTU 1500, but would
* fail for ppp at mtu=576.
*/
if ( device_mac )
{
/* Set the hw address before bringing the if up. */
@ -97,12 +96,13 @@ int tuntap_open(tuntap_dev *device,
traceEvent(TRACE_INFO, "Setting MAC: %s", buf);
}
snprintf(buf, sizeof(buf), "/sbin/ifconfig %s %s netmask %s mtu 1400 up",
ifr.ifr_name, device_ip, device_mask);
snprintf(buf, sizeof(buf), "/sbin/ifconfig %s %s netmask %s mtu %d up",
ifr.ifr_name, device_ip, device_mask, mtu);
system(buf);
traceEvent(TRACE_INFO, "Bringing up: %s", buf);
device->ip_addr = inet_addr(device_ip);
device->device_mask = inet_addr(device_mask);
read_mac(dev, (char*)device->mac_addr);
return(device->fd);
}