Annotation of qemu/net/tap-solaris.c, revision 1.1.1.2
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:
25: #include "net/tap.h"
1.1.1.2 ! root 26: #include "sysemu.h"
1.1 root 27:
28: #include <sys/stat.h>
29: #include <sys/ethernet.h>
30: #include <sys/sockio.h>
31: #include <netinet/arp.h>
32: #include <netinet/in.h>
33: #include <netinet/in_systm.h>
34: #include <netinet/ip.h>
35: #include <netinet/ip_icmp.h> // must come after ip.h
36: #include <netinet/udp.h>
37: #include <netinet/tcp.h>
38: #include <net/if.h>
39: #include <syslog.h>
40: #include <stropts.h>
41:
42: ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
43: {
44: struct strbuf sbuf;
45: int f = 0;
46:
47: sbuf.maxlen = maxlen;
48: sbuf.buf = (char *)buf;
49:
50: return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
51: }
52:
53: #define TUNNEWPPA (('T'<<16) | 0x0001)
54: /*
55: * Allocate TAP device, returns opened fd.
56: * Stores dev name in the first arg(must be large enough).
57: */
58: static int tap_alloc(char *dev, size_t dev_size)
59: {
60: int tap_fd, if_fd, ppa = -1;
61: static int ip_fd = 0;
62: char *ptr;
63:
64: static int arp_fd = 0;
65: int ip_muxid, arp_muxid;
66: struct strioctl strioc_if, strioc_ppa;
67: int link_type = I_PLINK;;
68: struct lifreq ifr;
69: char actual_name[32] = "";
70:
71: memset(&ifr, 0x0, sizeof(ifr));
72:
73: if( *dev ){
74: ptr = dev;
75: while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
76: ppa = atoi(ptr);
77: }
78:
79: /* Check if IP device was opened */
80: if( ip_fd )
81: close(ip_fd);
82:
83: TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
84: if (ip_fd < 0) {
85: syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
86: return -1;
87: }
88:
89: TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
90: if (tap_fd < 0) {
91: syslog(LOG_ERR, "Can't open /dev/tap");
92: return -1;
93: }
94:
95: /* Assign a new PPA and get its unit number. */
96: strioc_ppa.ic_cmd = TUNNEWPPA;
97: strioc_ppa.ic_timout = 0;
98: strioc_ppa.ic_len = sizeof(ppa);
99: strioc_ppa.ic_dp = (char *)&ppa;
100: if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
101: syslog (LOG_ERR, "Can't assign new interface");
102:
103: TFR(if_fd = open("/dev/tap", O_RDWR, 0));
104: if (if_fd < 0) {
105: syslog(LOG_ERR, "Can't open /dev/tap (2)");
106: return -1;
107: }
108: if(ioctl(if_fd, I_PUSH, "ip") < 0){
109: syslog(LOG_ERR, "Can't push IP module");
110: return -1;
111: }
112:
113: if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
114: syslog(LOG_ERR, "Can't get flags\n");
115:
116: snprintf (actual_name, 32, "tap%d", ppa);
117: pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
118:
119: ifr.lifr_ppa = ppa;
120: /* Assign ppa according to the unit number returned by tun device */
121:
122: if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
123: syslog (LOG_ERR, "Can't set PPA %d", ppa);
124: if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
125: syslog (LOG_ERR, "Can't get flags\n");
126: /* Push arp module to if_fd */
127: if (ioctl (if_fd, I_PUSH, "arp") < 0)
128: syslog (LOG_ERR, "Can't push ARP module (2)");
129:
130: /* Push arp module to ip_fd */
131: if (ioctl (ip_fd, I_POP, NULL) < 0)
132: syslog (LOG_ERR, "I_POP failed\n");
133: if (ioctl (ip_fd, I_PUSH, "arp") < 0)
134: syslog (LOG_ERR, "Can't push ARP module (3)\n");
135: /* Open arp_fd */
136: TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
137: if (arp_fd < 0)
138: syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
139:
140: /* Set ifname to arp */
141: strioc_if.ic_cmd = SIOCSLIFNAME;
142: strioc_if.ic_timout = 0;
143: strioc_if.ic_len = sizeof(ifr);
144: strioc_if.ic_dp = (char *)𝔦
145: if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
146: syslog (LOG_ERR, "Can't set ifname to arp\n");
147: }
148:
149: if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
150: syslog(LOG_ERR, "Can't link TAP device to IP");
151: return -1;
152: }
153:
154: if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
155: syslog (LOG_ERR, "Can't link TAP device to ARP");
156:
157: close (if_fd);
158:
159: memset(&ifr, 0x0, sizeof(ifr));
160: pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
161: ifr.lifr_ip_muxid = ip_muxid;
162: ifr.lifr_arp_muxid = arp_muxid;
163:
164: if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
165: {
166: ioctl (ip_fd, I_PUNLINK , arp_muxid);
167: ioctl (ip_fd, I_PUNLINK, ip_muxid);
168: syslog (LOG_ERR, "Can't set multiplexor id");
169: }
170:
171: snprintf(dev, dev_size, "tap%d", ppa);
172: return tap_fd;
173: }
174:
175: int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
176: {
177: char dev[10]="";
178: int fd;
179: if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
180: fprintf(stderr, "Cannot allocate TAP device\n");
181: return -1;
182: }
183: pstrcpy(ifname, ifname_size, dev);
184: if (*vnet_hdr) {
185: /* Solaris doesn't have IFF_VNET_HDR */
186: *vnet_hdr = 0;
187:
188: if (vnet_hdr_required && !*vnet_hdr) {
1.1.1.2 ! root 189: error_report("vnet_hdr=1 requested, but no kernel "
! 190: "support for IFF_VNET_HDR available");
1.1 root 191: close(fd);
192: return -1;
193: }
194: }
195: fcntl(fd, F_SETFL, O_NONBLOCK);
196: return fd;
197: }
198:
199: int tap_set_sndbuf(int fd, QemuOpts *opts)
200: {
201: return 0;
202: }
203:
204: int tap_probe_vnet_hdr(int fd)
205: {
206: return 0;
207: }
208:
209: int tap_probe_has_ufo(int fd)
210: {
211: return 0;
212: }
213:
214: void tap_fd_set_offload(int fd, int csum, int tso4,
215: int tso6, int ecn, int ufo)
216: {
217: }
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