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Annotation of qemu/net/vde.c, revision 1.1.1.3

1.1       root        1: /*
                      2:  * QEMU System Emulator
                      3:  *
                      4:  * Copyright (c) 2003-2008 Fabrice Bellard
                      5:  *
                      6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
                      7:  * of this software and associated documentation files (the "Software"), to deal
                      8:  * in the Software without restriction, including without limitation the rights
                      9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
                     10:  * copies of the Software, and to permit persons to whom the Software is
                     11:  * furnished to do so, subject to the following conditions:
                     12:  *
                     13:  * The above copyright notice and this permission notice shall be included in
                     14:  * all copies or substantial portions of the Software.
                     15:  *
                     16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
                     17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
                     19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
                     20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
                     21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
                     22:  * THE SOFTWARE.
                     23:  */
                     24: #include "net/vde.h"
                     25: 
                     26: #include "config-host.h"
                     27: 
                     28: #include <libvdeplug.h>
                     29: 
                     30: #include "net.h"
                     31: #include "qemu-char.h"
                     32: #include "qemu-common.h"
                     33: #include "qemu-option.h"
                     34: 
                     35: typedef struct VDEState {
                     36:     VLANClientState nc;
                     37:     VDECONN *vde;
                     38: } VDEState;
                     39: 
                     40: static void vde_to_qemu(void *opaque)
                     41: {
                     42:     VDEState *s = opaque;
                     43:     uint8_t buf[4096];
                     44:     int size;
                     45: 
                     46:     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
                     47:     if (size > 0) {
                     48:         qemu_send_packet(&s->nc, buf, size);
                     49:     }
                     50: }
                     51: 
                     52: static ssize_t vde_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
                     53: {
                     54:     VDEState *s = DO_UPCAST(VDEState, nc, nc);
                     55:     ssize_t ret;
                     56: 
                     57:     do {
                     58:       ret = vde_send(s->vde, (const char *)buf, size, 0);
                     59:     } while (ret < 0 && errno == EINTR);
                     60: 
                     61:     return ret;
                     62: }
                     63: 
                     64: static void vde_cleanup(VLANClientState *nc)
                     65: {
                     66:     VDEState *s = DO_UPCAST(VDEState, nc, nc);
                     67:     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
                     68:     vde_close(s->vde);
                     69: }
                     70: 
                     71: static NetClientInfo net_vde_info = {
                     72:     .type = NET_CLIENT_TYPE_VDE,
                     73:     .size = sizeof(VDEState),
                     74:     .receive = vde_receive,
                     75:     .cleanup = vde_cleanup,
                     76: };
                     77: 
                     78: static int net_vde_init(VLANState *vlan, const char *model,
                     79:                         const char *name, const char *sock,
                     80:                         int port, const char *group, int mode)
                     81: {
                     82:     VLANClientState *nc;
                     83:     VDEState *s;
                     84:     VDECONN *vde;
                     85:     char *init_group = (char *)group;
                     86:     char *init_sock = (char *)sock;
                     87: 
                     88:     struct vde_open_args args = {
                     89:         .port = port,
                     90:         .group = init_group,
                     91:         .mode = mode,
                     92:     };
                     93: 
                     94:     vde = vde_open(init_sock, (char *)"QEMU", &args);
                     95:     if (!vde){
                     96:         return -1;
                     97:     }
                     98: 
                     99:     nc = qemu_new_net_client(&net_vde_info, vlan, NULL, model, name);
                    100: 
                    101:     snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
                    102:              sock, vde_datafd(vde));
                    103: 
                    104:     s = DO_UPCAST(VDEState, nc, nc);
                    105: 
                    106:     s->vde = vde;
                    107: 
                    108:     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
                    109: 
                    110:     return 0;
                    111: }
                    112: 
                    113: int net_init_vde(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
                    114: {
                    115:     const char *sock;
                    116:     const char *group;
                    117:     int port, mode;
                    118: 
                    119:     sock  = qemu_opt_get(opts, "sock");
                    120:     group = qemu_opt_get(opts, "group");
                    121: 
                    122:     port = qemu_opt_get_number(opts, "port", 0);
                    123:     mode = qemu_opt_get_number(opts, "mode", 0700);
                    124: 
                    125:     if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
                    126:         return -1;
                    127:     }
                    128: 
                    129:     return 0;
                    130: }

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