Added IP address alias capability for FreeBSD
diff --git a/sgsnemu/tun.c b/sgsnemu/tun.c
index 208cca6..b406fdb 100644
--- a/sgsnemu/tun.c
+++ b/sgsnemu/tun.c
@@ -343,22 +343,28 @@
/* TODO: Is this needed on FreeBSD? */
if (!this->addrs) /* Use ioctl for first addr to make ping work */
- return tun_setaddr(this, addr, dstaddr, netmask);
+ return tun_setaddr(this, addr, dstaddr, netmask); /* TODO dstaddr */
memset(&areq, 0, sizeof(areq));
/* Set up interface name */
strncpy(areq.ifra_name, this->devname, IFNAMSIZ);
- ifr.ifr_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */
+ areq.ifra_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */
- ((struct sockaddr_in) areq.ifra_addr).sin_family = AF_INET;
- ((struct sockaddr_in) areq.ifra_addr).sin_len = sizeof(areq.ifra_addr);
- ((struct sockaddr_in) areq.ifra_addr).sin_addr.s_addr = addr->s_addr;
+ ((struct sockaddr_in*) &areq.ifra_addr)->sin_family = AF_INET;
+ ((struct sockaddr_in*) &areq.ifra_addr)->sin_len = sizeof(areq.ifra_addr);
+ ((struct sockaddr_in*) &areq.ifra_addr)->sin_addr.s_addr = addr->s_addr;
- ((struct sockaddr_in) areq.ifra_mask).sin_family = AF_INET;
- ((struct sockaddr_in) areq.ifra_mask).sin_len = sizeof(areq.ifra_mask);
- ((struct sockaddr_in) areq.ifra_mask).sin_addr.s_addr = netmask->s_addr;
+ ((struct sockaddr_in*) &areq.ifra_mask)->sin_family = AF_INET;
+ ((struct sockaddr_in*) &areq.ifra_mask)->sin_len = sizeof(areq.ifra_mask);
+ ((struct sockaddr_in*) &areq.ifra_mask)->sin_addr.s_addr = netmask->s_addr;
+ /* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */
+ ((struct sockaddr_in*) &areq.ifra_broadaddr)->sin_family = AF_INET;
+ ((struct sockaddr_in*) &areq.ifra_broadaddr)->sin_len =
+ sizeof(areq.ifra_broadaddr);
+ ((struct sockaddr_in*) &areq.ifra_broadaddr)->sin_addr.s_addr =
+ dstaddr->s_addr;
/* Create a channel to the NET kernel. */
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
@@ -607,6 +613,8 @@
#elif defined(__FreeBSD__)
char devname[IFNAMSIZ+5]; /* "/dev/" + ifname */
int devnum;
+ struct ifaliasreq areq;
+ int fd;
#elif defined(__sun__)
int if_fd, ppa = -1;
@@ -663,6 +671,27 @@
snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", devnum);
(*tun)->devname[sizeof((*tun)->devname)] = 0;
+
+ /* The tun device we found might have "old" IP addresses allocated */
+ /* We need to delete those. This problem is not present on Linux */
+
+ memset(&areq, 0, sizeof(areq));
+
+ /* Set up interface name */
+ strncpy(areq.ifra_name, (*tun)->devname, IFNAMSIZ);
+ areq.ifra_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */
+
+ /* Create a channel to the NET kernel. */
+ if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ sys_err(LOG_ERR, __FILE__, __LINE__, errno,
+ "socket() failed");
+ return -1;
+ }
+
+ /* Delete any IP addresses until SIOCDIFADDR fails */
+ while (ioctl(fd, SIOCDIFADDR, (void *) &areq) != -1);
+
+ close(fd);
return 0;
#elif defined(__sun__)