1 |
cebix |
1.1 |
/* |
2 |
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* ether_unix.cpp - Ethernet device driver, Unix specific stuff |
3 |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "sysdeps.h" |
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#include <sys/ioctl.h> |
24 |
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#include <sys/poll.h> |
25 |
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#include <semaphore.h> |
26 |
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#include <errno.h> |
27 |
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#include <stdio.h> |
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29 |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "macos_util.h" |
32 |
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#include "prefs.h" |
33 |
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#include "user_strings.h" |
34 |
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#include "ether.h" |
35 |
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#include "ether_defs.h" |
36 |
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37 |
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#define DEBUG 0 |
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#include "debug.h" |
39 |
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40 |
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#define MONITOR 0 |
41 |
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42 |
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43 |
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// List of attached protocols |
44 |
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struct NetProtocol { |
45 |
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NetProtocol *next; |
46 |
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uint16 type; |
47 |
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uint32 handler; |
48 |
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}; |
49 |
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50 |
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static NetProtocol *prot_list = NULL; |
51 |
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52 |
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53 |
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// Global variables |
54 |
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static int fd = -1; // fd of sheep_net device |
55 |
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static pthread_t ether_thread; // Packet reception thread |
56 |
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static pthread_attr_t ether_thread_attr; // Packet reception thread attributes |
57 |
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static bool thread_active = false; // Flag: Packet reception thread installed |
58 |
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static sem_t int_ack; // Interrupt acknowledge semaphore |
59 |
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static bool is_ethertap; // Flag: Ethernet device is ethertap |
60 |
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61 |
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// Prototypes |
62 |
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static void *receive_func(void *arg); |
63 |
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64 |
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65 |
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/* |
66 |
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* Find protocol in list |
67 |
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*/ |
68 |
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69 |
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static NetProtocol *find_protocol(uint16 type) |
70 |
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{ |
71 |
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// All 802.2 types are the same |
72 |
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if (type <= 1500) |
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type = 0; |
74 |
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75 |
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// Search list (we could use hashing here but there are usually only three |
76 |
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// handlers installed: 0x0000 for AppleTalk and 0x0800/0x0806 for TCP/IP) |
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NetProtocol *p = prot_list; |
78 |
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while (p) { |
79 |
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if (p->type == type) |
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return p; |
81 |
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p = p->next; |
82 |
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} |
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return NULL; |
84 |
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} |
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86 |
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87 |
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/* |
88 |
cebix |
1.2 |
* Remove all protocols |
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*/ |
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91 |
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static void remove_all_protocols(void) |
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{ |
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NetProtocol *p = prot_list; |
94 |
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while (p) { |
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NetProtocol *next = p->next; |
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delete p; |
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p = next; |
98 |
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} |
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prot_list = NULL; |
100 |
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} |
101 |
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102 |
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103 |
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/* |
104 |
cebix |
1.1 |
* Initialization |
105 |
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*/ |
106 |
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107 |
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void EtherInit(void) |
108 |
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{ |
109 |
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int nonblock = 1; |
110 |
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char str[256]; |
111 |
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112 |
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// Do nothing if no Ethernet device specified |
113 |
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const char *name = PrefsFindString("ether"); |
114 |
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if (name == NULL) |
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return; |
116 |
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117 |
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// Is it Ethertap? |
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is_ethertap = (strncmp(name, "tap", 3) == 0); |
119 |
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120 |
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// Open sheep_net or ethertap device |
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char dev_name[16]; |
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if (is_ethertap) |
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sprintf(dev_name, "/dev/%s", name); |
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else |
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strcpy(dev_name, "/dev/sheep_net"); |
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fd = open(dev_name, O_RDWR); |
127 |
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if (fd < 0) { |
128 |
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sprintf(str, GetString(STR_NO_SHEEP_NET_DRIVER_WARN), dev_name, strerror(errno)); |
129 |
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WarningAlert(str); |
130 |
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goto open_error; |
131 |
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} |
132 |
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133 |
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// Attach sheep_net to selected Ethernet card |
134 |
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if (!is_ethertap && ioctl(fd, SIOCSIFLINK, name) < 0) { |
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sprintf(str, GetString(STR_SHEEP_NET_ATTACH_WARN), strerror(errno)); |
136 |
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WarningAlert(str); |
137 |
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goto open_error; |
138 |
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} |
139 |
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140 |
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// Set nonblocking I/O |
141 |
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ioctl(fd, FIONBIO, &nonblock); |
142 |
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143 |
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// Get Ethernet address |
144 |
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if (is_ethertap) { |
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pid_t p = getpid(); // If configured for multicast, ethertap requires that the lower 32 bit of the Ethernet address are our PID |
146 |
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ether_addr[0] = 0xfe; |
147 |
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ether_addr[1] = 0xfd; |
148 |
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ether_addr[2] = p >> 24; |
149 |
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ether_addr[3] = p >> 16; |
150 |
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ether_addr[4] = p >> 8; |
151 |
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ether_addr[5] = p; |
152 |
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} else |
153 |
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ioctl(fd, SIOCGIFADDR, ether_addr); |
154 |
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D(bug("Ethernet address %02x %02x %02x %02x %02x %02x\n", ether_addr[0], ether_addr[1], ether_addr[2], ether_addr[3], ether_addr[4], ether_addr[5])); |
155 |
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156 |
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// Start packet reception thread |
157 |
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if (sem_init(&int_ack, 0, 0) < 0) { |
158 |
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printf("WARNING: Cannot init semaphore"); |
159 |
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goto open_error; |
160 |
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} |
161 |
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pthread_attr_init(ðer_thread_attr); |
162 |
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#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) |
163 |
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if (geteuid() == 0) { |
164 |
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pthread_attr_setinheritsched(ðer_thread_attr, PTHREAD_EXPLICIT_SCHED); |
165 |
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pthread_attr_setschedpolicy(ðer_thread_attr, SCHED_FIFO); |
166 |
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struct sched_param fifo_param; |
167 |
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fifo_param.sched_priority = (sched_get_priority_min(SCHED_FIFO) + sched_get_priority_max(SCHED_FIFO)) / 2 + 1; |
168 |
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pthread_attr_setschedparam(ðer_thread_attr, &fifo_param); |
169 |
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} |
170 |
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#endif |
171 |
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thread_active = (pthread_create(ðer_thread, ðer_thread_attr, receive_func, NULL) == 0); |
172 |
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if (!thread_active) { |
173 |
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printf("WARNING: Cannot start Ethernet thread"); |
174 |
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goto open_error; |
175 |
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} |
176 |
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177 |
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// Everything OK |
178 |
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net_open = true; |
179 |
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return; |
180 |
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181 |
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open_error: |
182 |
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if (thread_active) { |
183 |
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pthread_cancel(ether_thread); |
184 |
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pthread_join(ether_thread, NULL); |
185 |
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sem_destroy(&int_ack); |
186 |
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thread_active = false; |
187 |
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} |
188 |
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if (fd > 0) { |
189 |
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close(fd); |
190 |
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fd = -1; |
191 |
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} |
192 |
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} |
193 |
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194 |
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195 |
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/* |
196 |
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* Deinitialization |
197 |
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*/ |
198 |
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199 |
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void EtherExit(void) |
200 |
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{ |
201 |
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// Stop reception thread |
202 |
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if (thread_active) { |
203 |
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pthread_cancel(ether_thread); |
204 |
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pthread_join(ether_thread, NULL); |
205 |
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sem_destroy(&int_ack); |
206 |
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thread_active = false; |
207 |
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} |
208 |
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209 |
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// Close sheep_net device |
210 |
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if (fd > 0) |
211 |
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close(fd); |
212 |
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213 |
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// Remove all protocols |
214 |
cebix |
1.2 |
remove_all_protocols(); |
215 |
cebix |
1.1 |
} |
216 |
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217 |
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218 |
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/* |
219 |
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* Reset |
220 |
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*/ |
221 |
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222 |
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void EtherReset(void) |
223 |
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{ |
224 |
cebix |
1.2 |
remove_all_protocols(); |
225 |
cebix |
1.1 |
} |
226 |
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227 |
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228 |
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/* |
229 |
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* Add multicast address |
230 |
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*/ |
231 |
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232 |
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int16 ether_add_multicast(uint32 pb) |
233 |
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{ |
234 |
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if (ioctl(fd, SIOCADDMULTI, Mac2HostAddr(pb + eMultiAddr)) < 0) { |
235 |
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D(bug("WARNING: Couldn't enable multicast address\n")); |
236 |
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if (is_ethertap) |
237 |
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return noErr; |
238 |
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else |
239 |
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return eMultiErr; |
240 |
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} else |
241 |
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return noErr; |
242 |
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} |
243 |
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244 |
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245 |
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/* |
246 |
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* Delete multicast address |
247 |
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*/ |
248 |
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249 |
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int16 ether_del_multicast(uint32 pb) |
250 |
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{ |
251 |
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if (ioctl(fd, SIOCDELMULTI, Mac2HostAddr(pb + eMultiAddr)) < 0) { |
252 |
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D(bug("WARNING: Couldn't disable multicast address\n")); |
253 |
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return eMultiErr; |
254 |
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} else |
255 |
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return noErr; |
256 |
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} |
257 |
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258 |
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259 |
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/* |
260 |
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* Attach protocol handler |
261 |
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*/ |
262 |
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263 |
|
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int16 ether_attach_ph(uint16 type, uint32 handler) |
264 |
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{ |
265 |
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// Already attached? |
266 |
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NetProtocol *p = find_protocol(type); |
267 |
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if (p != NULL) |
268 |
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return lapProtErr; |
269 |
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else { |
270 |
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// No, create and attach |
271 |
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p = new NetProtocol; |
272 |
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p->next = prot_list; |
273 |
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p->type = type; |
274 |
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p->handler = handler; |
275 |
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prot_list = p; |
276 |
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return noErr; |
277 |
|
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} |
278 |
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} |
279 |
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280 |
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|
281 |
|
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/* |
282 |
|
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* Detach protocol handler |
283 |
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*/ |
284 |
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|
285 |
|
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int16 ether_detach_ph(uint16 type) |
286 |
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{ |
287 |
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NetProtocol *p = find_protocol(type); |
288 |
|
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if (p != NULL) { |
289 |
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NetProtocol *q = prot_list; |
290 |
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if (p == q) { |
291 |
cebix |
1.2 |
prot_list = p->next; |
292 |
cebix |
1.1 |
delete p; |
293 |
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return noErr; |
294 |
|
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} |
295 |
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while (q) { |
296 |
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if (q->next == p) { |
297 |
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q->next = p->next; |
298 |
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delete p; |
299 |
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return noErr; |
300 |
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} |
301 |
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q = q->next; |
302 |
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} |
303 |
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return lapProtErr; |
304 |
|
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} else |
305 |
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return lapProtErr; |
306 |
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} |
307 |
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|
308 |
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|
309 |
|
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/* |
310 |
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* Transmit raw ethernet packet |
311 |
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*/ |
312 |
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|
313 |
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int16 ether_write(uint32 wds) |
314 |
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{ |
315 |
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// Set source address |
316 |
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uint32 hdr = ReadMacInt32(wds + 2); |
317 |
|
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memcpy(Mac2HostAddr(hdr + 6), ether_addr, 6); |
318 |
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319 |
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// Copy packet to buffer |
320 |
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uint8 packet[1516], *p = packet; |
321 |
|
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int len = 0; |
322 |
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if (is_ethertap) { |
323 |
|
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*p++ = 0; // Ethertap discards the first 2 bytes |
324 |
|
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*p++ = 0; |
325 |
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len += 2; |
326 |
|
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} |
327 |
|
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for (;;) { |
328 |
|
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int w = ReadMacInt16(wds); |
329 |
|
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if (w == 0) |
330 |
|
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break; |
331 |
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memcpy(p, Mac2HostAddr(ReadMacInt32(wds + 2)), w); |
332 |
|
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len += w; |
333 |
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p += w; |
334 |
|
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wds += 6; |
335 |
|
|
} |
336 |
|
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|
337 |
|
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#if MONITOR |
338 |
|
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bug("Sending Ethernet packet:\n"); |
339 |
|
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for (int i=0; i<len; i++) { |
340 |
|
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bug("%02x ", packet[i]); |
341 |
|
|
} |
342 |
|
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bug("\n"); |
343 |
|
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#endif |
344 |
|
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|
345 |
|
|
// Transmit packet |
346 |
|
|
if (write(fd, packet, len) < 0) { |
347 |
|
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D(bug("WARNING: Couldn't transmit packet\n")); |
348 |
|
|
return excessCollsns; |
349 |
|
|
} else |
350 |
|
|
return noErr; |
351 |
|
|
} |
352 |
|
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|
353 |
|
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|
354 |
|
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/* |
355 |
|
|
* Packet reception thread |
356 |
|
|
*/ |
357 |
|
|
|
358 |
|
|
static void *receive_func(void *arg) |
359 |
|
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{ |
360 |
|
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for (;;) { |
361 |
|
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|
362 |
|
|
// Wait for packets to arrive |
363 |
|
|
struct pollfd pf = {fd, POLLIN, 0}; |
364 |
|
|
int res = poll(&pf, 1, -1); |
365 |
|
|
if (res <= 0) |
366 |
|
|
break; |
367 |
|
|
|
368 |
|
|
// Trigger Ethernet interrupt |
369 |
|
|
D(bug(" packet received, triggering Ethernet interrupt\n")); |
370 |
|
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SetInterruptFlag(INTFLAG_ETHER); |
371 |
|
|
TriggerInterrupt(); |
372 |
|
|
|
373 |
|
|
// Wait for interrupt acknowledge by EtherInterrupt() |
374 |
|
|
sem_wait(&int_ack); |
375 |
|
|
} |
376 |
|
|
return NULL; |
377 |
|
|
} |
378 |
|
|
|
379 |
|
|
|
380 |
|
|
/* |
381 |
|
|
* Ethernet interrupt - activate deferred tasks to call IODone or protocol handlers |
382 |
|
|
*/ |
383 |
|
|
|
384 |
|
|
void EtherInterrupt(void) |
385 |
|
|
{ |
386 |
|
|
D(bug("EtherIRQ\n")); |
387 |
|
|
|
388 |
|
|
// Call protocol handler for received packets |
389 |
|
|
uint8 packet[1516]; |
390 |
|
|
for (;;) { |
391 |
|
|
|
392 |
|
|
// Read packet from sheep_net device |
393 |
|
|
ssize_t length = read(fd, packet, is_ethertap ? 1516 : 1514); |
394 |
|
|
if (length < 14) |
395 |
|
|
break; |
396 |
|
|
|
397 |
|
|
#if MONITOR |
398 |
|
|
bug("Receiving Ethernet packet:\n"); |
399 |
|
|
for (int i=0; i<length; i++) { |
400 |
|
|
bug("%02x ", packet[i]); |
401 |
|
|
} |
402 |
|
|
bug("\n"); |
403 |
|
|
#endif |
404 |
|
|
|
405 |
|
|
// Pointer to packet data (Ethernet header) |
406 |
|
|
uint8 *p = packet; |
407 |
|
|
if (is_ethertap) { |
408 |
|
|
p += 2; // Ethertap has two random bytes before the packet |
409 |
|
|
length -= 2; |
410 |
|
|
} |
411 |
|
|
|
412 |
|
|
// Get packet type |
413 |
|
|
uint16 type = ntohs(*(uint16 *)(p + 12)); |
414 |
|
|
|
415 |
|
|
// Look for protocol |
416 |
|
|
NetProtocol *prot = find_protocol(type); |
417 |
|
|
if (prot == NULL) |
418 |
|
|
continue; |
419 |
|
|
|
420 |
|
|
// No default handler |
421 |
|
|
if (prot->handler == 0) |
422 |
|
|
continue; |
423 |
|
|
|
424 |
|
|
// Copy header to RHA |
425 |
|
|
memcpy(Mac2HostAddr(ether_data + ed_RHA), p, 14); |
426 |
|
|
D(bug(" header %08lx%04lx %08lx%04lx %04lx\n", ReadMacInt32(ether_data + ed_RHA), ReadMacInt16(ether_data + ed_RHA + 4), ReadMacInt32(ether_data + ed_RHA + 6), ReadMacInt16(ether_data + ed_RHA + 10), ReadMacInt16(ether_data + ed_RHA + 12))); |
427 |
|
|
|
428 |
|
|
// Call protocol handler |
429 |
|
|
M68kRegisters r; |
430 |
|
|
r.d[0] = type; // Packet type |
431 |
|
|
r.d[1] = length - 14; // Remaining packet length (without header, for ReadPacket) |
432 |
|
|
r.a[0] = (uint32)p + 14; // Pointer to packet (host address, for ReadPacket) |
433 |
|
|
r.a[3] = ether_data + ed_RHA + 14; // Pointer behind header in RHA |
434 |
|
|
r.a[4] = ether_data + ed_ReadPacket; // Pointer to ReadPacket/ReadRest routines |
435 |
|
|
D(bug(" calling protocol handler %08lx, type %08lx, length %08lx, data %08lx, rha %08lx, read_packet %08lx\n", prot->handler, r.d[0], r.d[1], r.a[0], r.a[3], r.a[4])); |
436 |
|
|
Execute68k(prot->handler, &r); |
437 |
|
|
} |
438 |
|
|
|
439 |
|
|
// Acknowledge interrupt to reception thread |
440 |
|
|
D(bug(" EtherIRQ done\n")); |
441 |
|
|
sem_post(&int_ack); |
442 |
|
|
} |