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-rw-r--r--net.c692
1 files changed, 1 insertions, 691 deletions
diff --git a/net.c b/net.c
index 1c75c383ee..8067c9df41 100644
--- a/net.c
+++ b/net.c
@@ -42,12 +42,6 @@
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
-#ifdef __NetBSD__
-#include <net/if_tap.h>
-#endif
-#ifdef __linux__
-#include "net/tap-linux.h"
-#endif
#include <arpa/inet.h>
#include <dirent.h>
#include <netdb.h>
@@ -1295,618 +1289,6 @@ void do_info_usernet(Monitor *mon)
#endif /* CONFIG_SLIRP */
-#if !defined(_WIN32) && !defined(_AIX)
-
-/* Maximum GSO packet size (64k) plus plenty of room for
- * the ethernet and virtio_net headers
- */
-#define TAP_BUFSIZE (4096 + 65536)
-
-typedef struct TAPState {
- VLANClientState *vc;
- int fd;
- char down_script[1024];
- char down_script_arg[128];
- uint8_t buf[TAP_BUFSIZE];
- unsigned int read_poll : 1;
- unsigned int write_poll : 1;
- unsigned int has_vnet_hdr : 1;
- unsigned int using_vnet_hdr : 1;
- unsigned int has_ufo: 1;
-} TAPState;
-
-static int launch_script(const char *setup_script, const char *ifname, int fd);
-
-static int tap_can_send(void *opaque);
-static void tap_send(void *opaque);
-static void tap_writable(void *opaque);
-
-static void tap_update_fd_handler(TAPState *s)
-{
- qemu_set_fd_handler2(s->fd,
- s->read_poll ? tap_can_send : NULL,
- s->read_poll ? tap_send : NULL,
- s->write_poll ? tap_writable : NULL,
- s);
-}
-
-static void tap_read_poll(TAPState *s, int enable)
-{
- s->read_poll = !!enable;
- tap_update_fd_handler(s);
-}
-
-static void tap_write_poll(TAPState *s, int enable)
-{
- s->write_poll = !!enable;
- tap_update_fd_handler(s);
-}
-
-static void tap_writable(void *opaque)
-{
- TAPState *s = opaque;
-
- tap_write_poll(s, 0);
-
- qemu_flush_queued_packets(s->vc);
-}
-
-static ssize_t tap_write_packet(TAPState *s, const struct iovec *iov, int iovcnt)
-{
- ssize_t len;
-
- do {
- len = writev(s->fd, iov, iovcnt);
- } while (len == -1 && errno == EINTR);
-
- if (len == -1 && errno == EAGAIN) {
- tap_write_poll(s, 1);
- return 0;
- }
-
- return len;
-}
-
-static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
- int iovcnt)
-{
- TAPState *s = vc->opaque;
- const struct iovec *iovp = iov;
- struct iovec iov_copy[iovcnt + 1];
- struct virtio_net_hdr hdr = { 0, };
-
- if (s->has_vnet_hdr && !s->using_vnet_hdr) {
- iov_copy[0].iov_base = &hdr;
- iov_copy[0].iov_len = sizeof(hdr);
- memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov));
- iovp = iov_copy;
- iovcnt++;
- }
-
- return tap_write_packet(s, iovp, iovcnt);
-}
-
-static ssize_t tap_receive_raw(VLANClientState *vc, const uint8_t *buf, size_t size)
-{
- TAPState *s = vc->opaque;
- struct iovec iov[2];
- int iovcnt = 0;
- struct virtio_net_hdr hdr = { 0, };
-
- if (s->has_vnet_hdr) {
- iov[iovcnt].iov_base = &hdr;
- iov[iovcnt].iov_len = sizeof(hdr);
- iovcnt++;
- }
-
- iov[iovcnt].iov_base = (char *)buf;
- iov[iovcnt].iov_len = size;
- iovcnt++;
-
- return tap_write_packet(s, iov, iovcnt);
-}
-
-static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
-{
- TAPState *s = vc->opaque;
- struct iovec iov[1];
-
- if (s->has_vnet_hdr && !s->using_vnet_hdr) {
- return tap_receive_raw(vc, buf, size);
- }
-
- iov[0].iov_base = (char *)buf;
- iov[0].iov_len = size;
-
- return tap_write_packet(s, iov, 1);
-}
-
-static int tap_can_send(void *opaque)
-{
- TAPState *s = opaque;
-
- return qemu_can_send_packet(s->vc);
-}
-
-#ifdef __sun__
-static 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;
-}
-#else
-static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
-{
- return read(tapfd, buf, maxlen);
-}
-#endif
-
-static void tap_send_completed(VLANClientState *vc, ssize_t len)
-{
- TAPState *s = vc->opaque;
- tap_read_poll(s, 1);
-}
-
-static void tap_send(void *opaque)
-{
- TAPState *s = opaque;
- int size;
-
- do {
- uint8_t *buf = s->buf;
-
- size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
- if (size <= 0) {
- break;
- }
-
- if (s->has_vnet_hdr && !s->using_vnet_hdr) {
- buf += sizeof(struct virtio_net_hdr);
- size -= sizeof(struct virtio_net_hdr);
- }
-
- size = qemu_send_packet_async(s->vc, buf, size, tap_send_completed);
- if (size == 0) {
- tap_read_poll(s, 0);
- }
- } while (size > 0);
-}
-
-/* sndbuf should be set to a value lower than the tx queue
- * capacity of any destination network interface.
- * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
- * a good default, given a 1500 byte MTU.
- */
-#define TAP_DEFAULT_SNDBUF 1024*1024
-
-static int tap_set_sndbuf(TAPState *s, QemuOpts *opts)
-{
- int sndbuf;
-
- sndbuf = qemu_opt_get_size(opts, "sndbuf", TAP_DEFAULT_SNDBUF);
- if (!sndbuf) {
- sndbuf = INT_MAX;
- }
-
- if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && qemu_opt_get(opts, "sndbuf")) {
- qemu_error("TUNSETSNDBUF ioctl failed: %s\n", strerror(errno));
- return -1;
- }
- return 0;
-}
-
-int tap_has_ufo(VLANClientState *vc)
-{
- TAPState *s = vc->opaque;
-
- assert(vc->type == NET_CLIENT_TYPE_TAP);
-
- return s->has_ufo;
-}
-
-int tap_has_vnet_hdr(VLANClientState *vc)
-{
- TAPState *s = vc->opaque;
-
- assert(vc->type == NET_CLIENT_TYPE_TAP);
-
- return s->has_vnet_hdr;
-}
-
-void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr)
-{
- TAPState *s = vc->opaque;
-
- using_vnet_hdr = using_vnet_hdr != 0;
-
- assert(vc->type == NET_CLIENT_TYPE_TAP);
- assert(s->has_vnet_hdr == using_vnet_hdr);
-
- s->using_vnet_hdr = using_vnet_hdr;
-}
-
-static int tap_probe_vnet_hdr(int fd)
-{
- struct ifreq ifr;
-
- if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
- qemu_error("TUNGETIFF ioctl() failed: %s\n", strerror(errno));
- return 0;
- }
-
- return ifr.ifr_flags & IFF_VNET_HDR;
-}
-
-void tap_set_offload(VLANClientState *vc, int csum, int tso4,
- int tso6, int ecn, int ufo)
-{
- TAPState *s = vc->opaque;
- unsigned int offload = 0;
-
- if (csum) {
- offload |= TUN_F_CSUM;
- if (tso4)
- offload |= TUN_F_TSO4;
- if (tso6)
- offload |= TUN_F_TSO6;
- if ((tso4 || tso6) && ecn)
- offload |= TUN_F_TSO_ECN;
- if (ufo)
- offload |= TUN_F_UFO;
- }
-
- if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) {
- offload &= ~TUN_F_UFO;
- if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) {
- fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
- strerror(errno));
- }
- }
-}
-
-static void tap_cleanup(VLANClientState *vc)
-{
- TAPState *s = vc->opaque;
-
- qemu_purge_queued_packets(vc);
-
- if (s->down_script[0])
- launch_script(s->down_script, s->down_script_arg, s->fd);
-
- tap_read_poll(s, 0);
- tap_write_poll(s, 0);
- close(s->fd);
- qemu_free(s);
-}
-
-/* fd support */
-
-static TAPState *net_tap_fd_init(VLANState *vlan,
- const char *model,
- const char *name,
- int fd,
- int vnet_hdr)
-{
- TAPState *s;
- unsigned int offload;
-
- s = qemu_mallocz(sizeof(TAPState));
- s->fd = fd;
- s->has_vnet_hdr = vnet_hdr != 0;
- s->using_vnet_hdr = 0;
- s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_TAP,
- vlan, NULL, model, name, NULL,
- tap_receive, tap_receive_raw,
- tap_receive_iov, tap_cleanup, s);
- s->has_ufo = 0;
- /* Check if tap supports UFO */
- offload = TUN_F_CSUM | TUN_F_UFO;
- if (ioctl(s->fd, TUNSETOFFLOAD, offload) == 0)
- s->has_ufo = 1;
- tap_set_offload(s->vc, 0, 0, 0, 0, 0);
- tap_read_poll(s, 1);
- return s;
-}
-
-#if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
-static int tap_open(char *ifname, int ifname_size,
- int *vnet_hdr, int vnet_hdr_required)
-{
- int fd;
- char *dev;
- struct stat s;
-
- TFR(fd = open("/dev/tap", O_RDWR));
- if (fd < 0) {
- fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
- return -1;
- }
-
- fstat(fd, &s);
- dev = devname(s.st_rdev, S_IFCHR);
- pstrcpy(ifname, ifname_size, dev);
-
- fcntl(fd, F_SETFL, O_NONBLOCK);
- return fd;
-}
-#elif defined(__sun__)
-#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)
-{
- 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) {
- syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
- return -1;
- }
-
- TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
- if (tap_fd < 0) {
- syslog(LOG_ERR, "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)
- syslog (LOG_ERR, "Can't assign new interface");
-
- TFR(if_fd = open("/dev/tap", O_RDWR, 0));
- if (if_fd < 0) {
- syslog(LOG_ERR, "Can't open /dev/tap (2)");
- return -1;
- }
- if(ioctl(if_fd, I_PUSH, "ip") < 0){
- syslog(LOG_ERR, "Can't push IP module");
- return -1;
- }
-
- if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
- syslog(LOG_ERR, "Can't get flags\n");
-
- 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)
- syslog (LOG_ERR, "Can't set PPA %d", ppa);
- if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
- syslog (LOG_ERR, "Can't get flags\n");
- /* Push arp module to if_fd */
- if (ioctl (if_fd, I_PUSH, "arp") < 0)
- syslog (LOG_ERR, "Can't push ARP module (2)");
-
- /* Push arp module to ip_fd */
- if (ioctl (ip_fd, I_POP, NULL) < 0)
- syslog (LOG_ERR, "I_POP failed\n");
- if (ioctl (ip_fd, I_PUSH, "arp") < 0)
- syslog (LOG_ERR, "Can't push ARP module (3)\n");
- /* Open arp_fd */
- TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
- if (arp_fd < 0)
- syslog (LOG_ERR, "Can't open %s\n", "/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 *)&ifr;
- if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
- syslog (LOG_ERR, "Can't set ifname to arp\n");
- }
-
- if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
- syslog(LOG_ERR, "Can't link TAP device to IP");
- return -1;
- }
-
- if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
- syslog (LOG_ERR, "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);
- syslog (LOG_ERR, "Can't set multiplexor id");
- }
-
- snprintf(dev, dev_size, "tap%d", ppa);
- return tap_fd;
-}
-
-static int tap_open(char *ifname, int ifname_size,
- int *vnet_hdr, int vnet_hdr_required)
-{
- char dev[10]="";
- int fd;
- if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
- fprintf(stderr, "Cannot allocate TAP device\n");
- return -1;
- }
- pstrcpy(ifname, ifname_size, dev);
- fcntl(fd, F_SETFL, O_NONBLOCK);
- return fd;
-}
-#elif defined (_AIX)
-static int tap_open(char *ifname, int ifname_size,
- int *vnet_hdr, int vnet_hdr_required)
-{
- fprintf (stderr, "no tap on AIX\n");
- return -1;
-}
-#else
-static int tap_open(char *ifname, int ifname_size,
- int *vnet_hdr, int vnet_hdr_required)
-{
- struct ifreq ifr;
- int fd, ret;
-
- TFR(fd = open("/dev/net/tun", O_RDWR));
- if (fd < 0) {
- fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
- return -1;
- }
- memset(&ifr, 0, sizeof(ifr));
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
-
- if (*vnet_hdr) {
- unsigned int features;
-
- if (ioctl(fd, TUNGETFEATURES, &features) == 0 &&
- features & IFF_VNET_HDR) {
- *vnet_hdr = 1;
- ifr.ifr_flags |= IFF_VNET_HDR;
- }
-
- if (vnet_hdr_required && !*vnet_hdr) {
- qemu_error("vnet_hdr=1 requested, but no kernel "
- "support for IFF_VNET_HDR available");
- close(fd);
- return -1;
- }
- }
-
- if (ifname[0] != '\0')
- pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
- else
- pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
- ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
- if (ret != 0) {
- fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
- close(fd);
- return -1;
- }
- pstrcpy(ifname, ifname_size, ifr.ifr_name);
- fcntl(fd, F_SETFL, O_NONBLOCK);
- return fd;
-}
-#endif
-
-static int launch_script(const char *setup_script, const char *ifname, int fd)
-{
- sigset_t oldmask, mask;
- int pid, status;
- char *args[3];
- char **parg;
-
- sigemptyset(&mask);
- sigaddset(&mask, SIGCHLD);
- sigprocmask(SIG_BLOCK, &mask, &oldmask);
-
- /* try to launch network script */
- pid = fork();
- if (pid == 0) {
- int open_max = sysconf(_SC_OPEN_MAX), i;
-
- for (i = 0; i < open_max; i++) {
- if (i != STDIN_FILENO &&
- i != STDOUT_FILENO &&
- i != STDERR_FILENO &&
- i != fd) {
- close(i);
- }
- }
- parg = args;
- *parg++ = (char *)setup_script;
- *parg++ = (char *)ifname;
- *parg++ = NULL;
- execv(setup_script, args);
- _exit(1);
- } else if (pid > 0) {
- while (waitpid(pid, &status, 0) != pid) {
- /* loop */
- }
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
-
- if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
- return 0;
- }
- }
- fprintf(stderr, "%s: could not launch network script\n", setup_script);
- return -1;
-}
-
-static int net_tap_init(QemuOpts *opts, int *vnet_hdr)
-{
- int fd, vnet_hdr_required;
- char ifname[128] = {0,};
- const char *setup_script;
-
- if (qemu_opt_get(opts, "ifname")) {
- pstrcpy(ifname, sizeof(ifname), qemu_opt_get(opts, "ifname"));
- }
-
- *vnet_hdr = qemu_opt_get_bool(opts, "vnet_hdr", 1);
- if (qemu_opt_get(opts, "vnet_hdr")) {
- vnet_hdr_required = *vnet_hdr;
- } else {
- vnet_hdr_required = 0;
- }
-
- TFR(fd = tap_open(ifname, sizeof(ifname), vnet_hdr, vnet_hdr_required));
- if (fd < 0) {
- return -1;
- }
-
- setup_script = qemu_opt_get(opts, "script");
- if (setup_script &&
- setup_script[0] != '\0' &&
- strcmp(setup_script, "no") != 0 &&
- launch_script(setup_script, ifname, fd)) {
- close(fd);
- return -1;
- }
-
- qemu_opt_set(opts, "ifname", ifname);
-
- return fd;
-}
-
-#endif /* !defined(_WIN32) && !defined(_AIX) */
-
#if defined(CONFIG_VDE)
typedef struct VDEState {
VLANClientState *vc;
@@ -2622,7 +2004,7 @@ int qemu_find_nic_model(NICInfo *nd, const char * const *models,
return -1;
}
-static int net_handle_fd_param(Monitor *mon, const char *param)
+int net_handle_fd_param(Monitor *mon, const char *param)
{
if (!qemu_isdigit(param[0])) {
int fd;
@@ -2802,78 +2184,6 @@ static int net_init_slirp(QemuOpts *opts,
}
#endif /* CONFIG_SLIRP */
-#if !defined(_WIN32) && !defined(_AIX)
-int net_init_tap(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
-{
- TAPState *s;
- int fd, vnet_hdr;
-
- if (qemu_opt_get(opts, "fd")) {
- if (qemu_opt_get(opts, "ifname") ||
- qemu_opt_get(opts, "script") ||
- qemu_opt_get(opts, "downscript") ||
- qemu_opt_get(opts, "vnet_hdr")) {
- qemu_error("ifname=, script=, downscript= and vnet_hdr= is invalid with fd=\n");
- return -1;
- }
-
- fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
- if (fd == -1) {
- return -1;
- }
-
- fcntl(fd, F_SETFL, O_NONBLOCK);
-
- vnet_hdr = tap_probe_vnet_hdr(fd);
- } else {
- if (!qemu_opt_get(opts, "script")) {
- qemu_opt_set(opts, "script", DEFAULT_NETWORK_SCRIPT);
- }
-
- if (!qemu_opt_get(opts, "downscript")) {
- qemu_opt_set(opts, "downscript", DEFAULT_NETWORK_DOWN_SCRIPT);
- }
-
- fd = net_tap_init(opts, &vnet_hdr);
- }
-
- s = net_tap_fd_init(vlan, "tap", name, fd, vnet_hdr);
- if (!s) {
- close(fd);
- return -1;
- }
-
- if (tap_set_sndbuf(s, opts) < 0) {
- return -1;
- }
-
- if (qemu_opt_get(opts, "fd")) {
- snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
- } else {
- const char *ifname, *script, *downscript;
-
- ifname = qemu_opt_get(opts, "ifname");
- script = qemu_opt_get(opts, "script");
- downscript = qemu_opt_get(opts, "downscript");
-
- snprintf(s->vc->info_str, sizeof(s->vc->info_str),
- "ifname=%s,script=%s,downscript=%s",
- ifname, script, downscript);
-
- if (strcmp(downscript, "no") != 0) {
- snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
- snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
- }
- }
-
- if (vlan) {
- vlan->nb_host_devs++;
- }
-
- return 0;
-}
-#endif /* !defined(_WIN32) && !defined(_AIX) */
-
static int net_init_socket(QemuOpts *opts,
Monitor *mon,
const char *name,