--- /dev/null
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include "sysemu/sysemu.h"
+
+#include <sys/stat.h>
+#include <sys/ethernet.h>
+#include <sys/sockio.h>
+#include <netinet/arp.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_icmp.h> // must come after ip.h
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <net/if.h>
+#include <stropts.h>
+#include "qemu/error-report.h"
+
+ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
+{
+ struct strbuf sbuf;
+ int f = 0;
+
+ sbuf.maxlen = maxlen;
+ sbuf.buf = (char *)buf;
+
+ return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
+}
+
+#define TUNNEWPPA (('T'<<16) | 0x0001)
+/*
+ * Allocate TAP device, returns opened fd.
+ * Stores dev name in the first arg(must be large enough).
+ */
+static int tap_alloc(char *dev, size_t dev_size, Error **errp)
+{
+ /* FIXME leaks like a sieve on error paths */
+ /* FIXME suspicious: many errors are reported, then ignored */
+ int tap_fd, if_fd, ppa = -1;
+ static int ip_fd = 0;
+ char *ptr;
+
+ static int arp_fd = 0;
+ int ip_muxid, arp_muxid;
+ struct strioctl strioc_if, strioc_ppa;
+ int link_type = I_PLINK;
+ struct lifreq ifr;
+ char actual_name[32] = "";
+
+ memset(&ifr, 0x0, sizeof(ifr));
+
+ if( *dev ){
+ ptr = dev;
+ while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
+ ppa = atoi(ptr);
+ }
+
+ /* Check if IP device was opened */
+ if( ip_fd )
+ close(ip_fd);
+
+ TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
+ if (ip_fd < 0) {
+ error_setg(errp, "Can't open /dev/ip (actually /dev/udp)");
+ return -1;
+ }
+
+ TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
+ if (tap_fd < 0) {
+ error_setg(errp, "Can't open /dev/tap");
+ return -1;
+ }
+
+ /* Assign a new PPA and get its unit number. */
+ strioc_ppa.ic_cmd = TUNNEWPPA;
+ strioc_ppa.ic_timout = 0;
+ strioc_ppa.ic_len = sizeof(ppa);
+ strioc_ppa.ic_dp = (char *)&ppa;
+ if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
+ error_report("Can't assign new interface");
+
+ TFR(if_fd = open("/dev/tap", O_RDWR, 0));
+ if (if_fd < 0) {
+ error_setg(errp, "Can't open /dev/tap (2)");
+ return -1;
+ }
+ if(ioctl(if_fd, I_PUSH, "ip") < 0){
+ error_setg(errp, "Can't push IP module");
+ return -1;
+ }
+
+ if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
+ error_report("Can't get flags");
+
+ snprintf (actual_name, 32, "tap%d", ppa);
+ pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
+
+ ifr.lifr_ppa = ppa;
+ /* Assign ppa according to the unit number returned by tun device */
+
+ if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
+ error_report("Can't set PPA %d", ppa);
+ if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
+ error_report("Can't get flags");
+ /* Push arp module to if_fd */
+ if (ioctl (if_fd, I_PUSH, "arp") < 0)
+ error_report("Can't push ARP module (2)");
+
+ /* Push arp module to ip_fd */
+ if (ioctl (ip_fd, I_POP, NULL) < 0)
+ error_report("I_POP failed");
+ if (ioctl (ip_fd, I_PUSH, "arp") < 0)
+ error_report("Can't push ARP module (3)");
+ /* Open arp_fd */
+ TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
+ if (arp_fd < 0)
+ error_report("Can't open %s", "/dev/tap");
+
+ /* Set ifname to arp */
+ strioc_if.ic_cmd = SIOCSLIFNAME;
+ strioc_if.ic_timout = 0;
+ strioc_if.ic_len = sizeof(ifr);
+ strioc_if.ic_dp = (char *)𝔦
+ if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
+ error_report("Can't set ifname to arp");
+ }
+
+ if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
+ error_setg(errp, "Can't link TAP device to IP");
+ return -1;
+ }
+
+ if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
+ error_report("Can't link TAP device to ARP");
+
+ close (if_fd);
+
+ memset(&ifr, 0x0, sizeof(ifr));
+ pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
+ ifr.lifr_ip_muxid = ip_muxid;
+ ifr.lifr_arp_muxid = arp_muxid;
+
+ if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
+ {
+ ioctl (ip_fd, I_PUNLINK , arp_muxid);
+ ioctl (ip_fd, I_PUNLINK, ip_muxid);
+ error_report("Can't set multiplexor id");
+ }
+
+ snprintf(dev, dev_size, "tap%d", ppa);
+ return tap_fd;
+}
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ char dev[10]="";
+ int fd;
+
+ fd = tap_alloc(dev, sizeof(dev), errp);
+ if (fd < 0) {
+ return -1;
+ }
+ pstrcpy(ifname, ifname_size, dev);
+ if (*vnet_hdr) {
+ /* Solaris doesn't have IFF_VNET_HDR */
+ *vnet_hdr = 0;
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ close(fd);
+ return -1;
+ }
+ }
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+}
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ return 0;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ return 0;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+int tap_fd_enable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
Code Review / kvmfornfv.git / blobdiff