diff options
Diffstat (limited to 'net.c')
| -rw-r--r-- | net.c | 530 |
1 files changed, 1 insertions, 529 deletions
@@ -89,6 +89,7 @@ #include "qemu-common.h" #include "net.h" #include "net/tap.h" +#include "net/socket.h" #include "net/slirp.h" #include "net/vde.h" #include "monitor.h" @@ -716,454 +717,6 @@ qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt) return qemu_sendv_packet_async(vc, iov, iovcnt, NULL); } -/* network connection */ -typedef struct NetSocketState { - VLANClientState *vc; - int fd; - int state; /* 0 = getting length, 1 = getting data */ - unsigned int index; - unsigned int packet_len; - uint8_t buf[4096]; - struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */ -} NetSocketState; - -typedef struct NetSocketListenState { - VLANState *vlan; - char *model; - char *name; - int fd; -} NetSocketListenState; - -/* XXX: we consider we can send the whole packet without blocking */ -static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size) -{ - NetSocketState *s = vc->opaque; - uint32_t len; - len = htonl(size); - - send_all(s->fd, (const uint8_t *)&len, sizeof(len)); - return send_all(s->fd, buf, size); -} - -static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size) -{ - NetSocketState *s = vc->opaque; - - return sendto(s->fd, (const void *)buf, size, 0, - (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst)); -} - -static void net_socket_send(void *opaque) -{ - NetSocketState *s = opaque; - int size, err; - unsigned l; - uint8_t buf1[4096]; - const uint8_t *buf; - - size = recv(s->fd, (void *)buf1, sizeof(buf1), 0); - if (size < 0) { - err = socket_error(); - if (err != EWOULDBLOCK) - goto eoc; - } else if (size == 0) { - /* end of connection */ - eoc: - qemu_set_fd_handler(s->fd, NULL, NULL, NULL); - closesocket(s->fd); - return; - } - buf = buf1; - while (size > 0) { - /* reassemble a packet from the network */ - switch(s->state) { - case 0: - l = 4 - s->index; - if (l > size) - l = size; - memcpy(s->buf + s->index, buf, l); - buf += l; - size -= l; - s->index += l; - if (s->index == 4) { - /* got length */ - s->packet_len = ntohl(*(uint32_t *)s->buf); - s->index = 0; - s->state = 1; - } - break; - case 1: - l = s->packet_len - s->index; - if (l > size) - l = size; - if (s->index + l <= sizeof(s->buf)) { - memcpy(s->buf + s->index, buf, l); - } else { - fprintf(stderr, "serious error: oversized packet received," - "connection terminated.\n"); - s->state = 0; - goto eoc; - } - - s->index += l; - buf += l; - size -= l; - if (s->index >= s->packet_len) { - qemu_send_packet(s->vc, s->buf, s->packet_len); - s->index = 0; - s->state = 0; - } - break; - } - } -} - -static void net_socket_send_dgram(void *opaque) -{ - NetSocketState *s = opaque; - int size; - - size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0); - if (size < 0) - return; - if (size == 0) { - /* end of connection */ - qemu_set_fd_handler(s->fd, NULL, NULL, NULL); - return; - } - qemu_send_packet(s->vc, s->buf, size); -} - -static int net_socket_mcast_create(struct sockaddr_in *mcastaddr) -{ - struct ip_mreq imr; - int fd; - int val, ret; - if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) { - fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n", - inet_ntoa(mcastaddr->sin_addr), - (int)ntohl(mcastaddr->sin_addr.s_addr)); - return -1; - - } - fd = socket(PF_INET, SOCK_DGRAM, 0); - if (fd < 0) { - perror("socket(PF_INET, SOCK_DGRAM)"); - return -1; - } - - val = 1; - ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, - (const char *)&val, sizeof(val)); - if (ret < 0) { - perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)"); - goto fail; - } - - ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr)); - if (ret < 0) { - perror("bind"); - goto fail; - } - - /* Add host to multicast group */ - imr.imr_multiaddr = mcastaddr->sin_addr; - imr.imr_interface.s_addr = htonl(INADDR_ANY); - - ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, - (const char *)&imr, sizeof(struct ip_mreq)); - if (ret < 0) { - perror("setsockopt(IP_ADD_MEMBERSHIP)"); - goto fail; - } - - /* Force mcast msgs to loopback (eg. several QEMUs in same host */ - val = 1; - ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, - (const char *)&val, sizeof(val)); - if (ret < 0) { - perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)"); - goto fail; - } - - socket_set_nonblock(fd); - return fd; -fail: - if (fd >= 0) - closesocket(fd); - return -1; -} - -static void net_socket_cleanup(VLANClientState *vc) -{ - NetSocketState *s = vc->opaque; - qemu_set_fd_handler(s->fd, NULL, NULL, NULL); - close(s->fd); - qemu_free(s); -} - -static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan, - const char *model, - const char *name, - int fd, int is_connected) -{ - struct sockaddr_in saddr; - int newfd; - socklen_t saddr_len; - NetSocketState *s; - - /* fd passed: multicast: "learn" dgram_dst address from bound address and save it - * Because this may be "shared" socket from a "master" process, datagrams would be recv() - * by ONLY ONE process: we must "clone" this dgram socket --jjo - */ - - if (is_connected) { - if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) { - /* must be bound */ - if (saddr.sin_addr.s_addr==0) { - fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n", - fd); - return NULL; - } - /* clone dgram socket */ - newfd = net_socket_mcast_create(&saddr); - if (newfd < 0) { - /* error already reported by net_socket_mcast_create() */ - close(fd); - return NULL; - } - /* clone newfd to fd, close newfd */ - dup2(newfd, fd); - close(newfd); - - } else { - fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n", - fd, strerror(errno)); - return NULL; - } - } - - s = qemu_mallocz(sizeof(NetSocketState)); - s->fd = fd; - - s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SOCKET, - vlan, NULL, model, name, NULL, - net_socket_receive_dgram, NULL, NULL, - net_socket_cleanup, s); - qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s); - - /* mcast: save bound address as dst */ - if (is_connected) s->dgram_dst=saddr; - - snprintf(s->vc->info_str, sizeof(s->vc->info_str), - "socket: fd=%d (%s mcast=%s:%d)", - fd, is_connected? "cloned" : "", - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); - return s; -} - -static void net_socket_connect(void *opaque) -{ - NetSocketState *s = opaque; - qemu_set_fd_handler(s->fd, net_socket_send, NULL, s); -} - -static NetSocketState *net_socket_fd_init_stream(VLANState *vlan, - const char *model, - const char *name, - int fd, int is_connected) -{ - NetSocketState *s; - s = qemu_mallocz(sizeof(NetSocketState)); - s->fd = fd; - s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SOCKET, - vlan, NULL, model, name, NULL, - net_socket_receive, NULL, NULL, - net_socket_cleanup, s); - snprintf(s->vc->info_str, sizeof(s->vc->info_str), - "socket: fd=%d", fd); - if (is_connected) { - net_socket_connect(s); - } else { - qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s); - } - return s; -} - -static NetSocketState *net_socket_fd_init(VLANState *vlan, - const char *model, const char *name, - int fd, int is_connected) -{ - int so_type = -1, optlen=sizeof(so_type); - - if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type, - (socklen_t *)&optlen)< 0) { - fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd); - return NULL; - } - switch(so_type) { - case SOCK_DGRAM: - return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected); - case SOCK_STREAM: - return net_socket_fd_init_stream(vlan, model, name, fd, is_connected); - default: - /* who knows ... this could be a eg. a pty, do warn and continue as stream */ - fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd); - return net_socket_fd_init_stream(vlan, model, name, fd, is_connected); - } - return NULL; -} - -static void net_socket_accept(void *opaque) -{ - NetSocketListenState *s = opaque; - NetSocketState *s1; - struct sockaddr_in saddr; - socklen_t len; - int fd; - - for(;;) { - len = sizeof(saddr); - fd = accept(s->fd, (struct sockaddr *)&saddr, &len); - if (fd < 0 && errno != EINTR) { - return; - } else if (fd >= 0) { - break; - } - } - s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1); - if (!s1) { - closesocket(fd); - } else { - snprintf(s1->vc->info_str, sizeof(s1->vc->info_str), - "socket: connection from %s:%d", - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); - } -} - -static int net_socket_listen_init(VLANState *vlan, - const char *model, - const char *name, - const char *host_str) -{ - NetSocketListenState *s; - int fd, val, ret; - struct sockaddr_in saddr; - - if (parse_host_port(&saddr, host_str) < 0) - return -1; - - s = qemu_mallocz(sizeof(NetSocketListenState)); - - fd = socket(PF_INET, SOCK_STREAM, 0); - if (fd < 0) { - perror("socket"); - return -1; - } - socket_set_nonblock(fd); - - /* allow fast reuse */ - val = 1; - setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val)); - - ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)); - if (ret < 0) { - perror("bind"); - return -1; - } - ret = listen(fd, 0); - if (ret < 0) { - perror("listen"); - return -1; - } - s->vlan = vlan; - s->model = qemu_strdup(model); - s->name = name ? qemu_strdup(name) : NULL; - s->fd = fd; - qemu_set_fd_handler(fd, net_socket_accept, NULL, s); - return 0; -} - -static int net_socket_connect_init(VLANState *vlan, - const char *model, - const char *name, - const char *host_str) -{ - NetSocketState *s; - int fd, connected, ret, err; - struct sockaddr_in saddr; - - if (parse_host_port(&saddr, host_str) < 0) - return -1; - - fd = socket(PF_INET, SOCK_STREAM, 0); - if (fd < 0) { - perror("socket"); - return -1; - } - socket_set_nonblock(fd); - - connected = 0; - for(;;) { - ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr)); - if (ret < 0) { - err = socket_error(); - if (err == EINTR || err == EWOULDBLOCK) { - } else if (err == EINPROGRESS) { - break; -#ifdef _WIN32 - } else if (err == WSAEALREADY) { - break; -#endif - } else { - perror("connect"); - closesocket(fd); - return -1; - } - } else { - connected = 1; - break; - } - } - s = net_socket_fd_init(vlan, model, name, fd, connected); - if (!s) - return -1; - snprintf(s->vc->info_str, sizeof(s->vc->info_str), - "socket: connect to %s:%d", - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); - return 0; -} - -static int net_socket_mcast_init(VLANState *vlan, - const char *model, - const char *name, - const char *host_str) -{ - NetSocketState *s; - int fd; - struct sockaddr_in saddr; - - if (parse_host_port(&saddr, host_str) < 0) - return -1; - - - fd = net_socket_mcast_create(&saddr); - if (fd < 0) - return -1; - - s = net_socket_fd_init(vlan, model, name, fd, 0); - if (!s) - return -1; - - s->dgram_dst = saddr; - - snprintf(s->vc->info_str, sizeof(s->vc->info_str), - "socket: mcast=%s:%d", - inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); - return 0; - -} - typedef struct DumpState { VLANClientState *pcap_vc; int fd; @@ -1447,87 +1000,6 @@ static int net_init_nic(QemuOpts *opts, return idx; } -static int net_init_socket(QemuOpts *opts, - Monitor *mon, - const char *name, - VLANState *vlan) -{ - if (qemu_opt_get(opts, "fd")) { - int fd; - - if (qemu_opt_get(opts, "listen") || - qemu_opt_get(opts, "connect") || - qemu_opt_get(opts, "mcast")) { - qemu_error("listen=, connect= and mcast= is invalid with fd=\n"); - return -1; - } - - fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd")); - if (fd == -1) { - return -1; - } - - if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) { - close(fd); - return -1; - } - } else if (qemu_opt_get(opts, "listen")) { - const char *listen; - - if (qemu_opt_get(opts, "fd") || - qemu_opt_get(opts, "connect") || - qemu_opt_get(opts, "mcast")) { - qemu_error("fd=, connect= and mcast= is invalid with listen=\n"); - return -1; - } - - listen = qemu_opt_get(opts, "listen"); - - if (net_socket_listen_init(vlan, "socket", name, listen) == -1) { - return -1; - } - } else if (qemu_opt_get(opts, "connect")) { - const char *connect; - - if (qemu_opt_get(opts, "fd") || - qemu_opt_get(opts, "listen") || - qemu_opt_get(opts, "mcast")) { - qemu_error("fd=, listen= and mcast= is invalid with connect=\n"); - return -1; - } - - connect = qemu_opt_get(opts, "connect"); - - if (net_socket_connect_init(vlan, "socket", name, connect) == -1) { - return -1; - } - } else if (qemu_opt_get(opts, "mcast")) { - const char *mcast; - - if (qemu_opt_get(opts, "fd") || - qemu_opt_get(opts, "connect") || - qemu_opt_get(opts, "listen")) { - qemu_error("fd=, connect= and listen= is invalid with mcast=\n"); - return -1; - } - - mcast = qemu_opt_get(opts, "mcast"); - - if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) { - return -1; - } - } else { - qemu_error("-socket requires fd=, listen=, connect= or mcast=\n"); - return -1; - } - - if (vlan) { - vlan->nb_host_devs++; - } - - return 0; -} - static int net_init_dump(QemuOpts *opts, Monitor *mon, const char *name, |