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41 | |
41 | |
42 | #include "gettext.h" |
42 | #include "gettext.h" |
43 | |
43 | |
44 | #include "conf.h" |
44 | #include "conf.h" |
45 | |
45 | |
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46 | #if TEST_ETHEREMU |
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47 | # include "ether_emu.C" |
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48 | #endif |
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49 | |
46 | const char * |
50 | const char * |
47 | tap_device::info () |
51 | tap_device::info () |
48 | { |
52 | { |
49 | return _("Linux tun/tap device"); |
53 | return _("Linux tun/tap device"); |
50 | } |
54 | } |
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62 | slog (L_ERR, _("could not open device %s: %s"), device, strerror (errno)); |
66 | slog (L_ERR, _("could not open device %s: %s"), device, strerror (errno)); |
63 | exit (1); |
67 | exit (1); |
64 | } |
68 | } |
65 | |
69 | |
66 | memset (&ifr, 0, sizeof (ifr)); |
70 | memset (&ifr, 0, sizeof (ifr)); |
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71 | #if TEST_ETHEREMU |
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72 | ifr.ifr_flags = IFF_TUN | IFF_NO_PI; |
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73 | #else |
67 | ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
74 | ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
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75 | #endif |
68 | |
76 | |
69 | if (conf.ifname) |
77 | if (conf.ifname) |
70 | strncpy (ifr.ifr_name, conf.ifname, IFNAMSIZ); |
78 | strncpy (ifr.ifr_name, conf.ifname, IFNAMSIZ); |
71 | else |
79 | else |
72 | ifr.ifr_name[0] = 0; |
80 | ifr.ifr_name[0] = 0; |
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96 | tap_packet * |
104 | tap_packet * |
97 | tap_device::recv () |
105 | tap_device::recv () |
98 | { |
106 | { |
99 | tap_packet *pkt = new tap_packet; |
107 | tap_packet *pkt = new tap_packet; |
100 | |
108 | |
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109 | #if TEST_ETHEREMU |
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110 | pkt->len = read (fd, &((*pkt)[14]), MAX_MTU - 14); |
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111 | #else |
101 | pkt->len = read (fd, &((*pkt)[0]), MAX_MTU); |
112 | pkt->len = read (fd, &((*pkt)[0]), MAX_MTU); |
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113 | #endif |
102 | |
114 | |
103 | if (pkt->len <= 0) |
115 | if (pkt->len <= 0) |
104 | { |
116 | { |
105 | delete pkt; |
117 | delete pkt; |
106 | slog (L_ERR, _("error while reading from %s %s: %s"), |
118 | slog (L_ERR, _("error while reading from %s %s: %s"), |
107 | info (), DEFAULT_DEVICE, strerror (errno)); |
119 | info (), DEFAULT_DEVICE, strerror (errno)); |
108 | return 0; |
120 | return 0; |
109 | } |
121 | } |
110 | |
122 | |
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123 | #if TEST_ETHEREMU |
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124 | pkt->len += 14; |
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125 | |
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126 | // assume ipv4 |
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127 | (*pkt)[12] = 0x08; |
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128 | (*pkt)[13] = 0x00; |
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129 | |
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130 | if (!ether_emu.tun_to_tap (pkt)) |
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131 | { |
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132 | delete pkt; |
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133 | return 0; |
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134 | } |
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135 | #endif |
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136 | |
111 | return pkt; |
137 | return pkt; |
112 | } |
138 | } |
113 | |
139 | |
114 | void |
140 | void |
115 | tap_device::send (tap_packet *pkt) |
141 | tap_device::send (tap_packet *pkt) |
116 | { |
142 | { |
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143 | #if TEST_ETHEREMU |
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144 | if (ether_emu.tap_to_tun (pkt) && |
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145 | write (fd, &((*pkt)[14]), pkt->len - 14) < 0) |
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146 | #else |
117 | if (write (fd, &((*pkt)[0]), pkt->len) < 0) |
147 | if (write (fd, &((*pkt)[0]), pkt->len) < 0) |
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148 | #endif |
118 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
149 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
119 | strerror (errno)); |
150 | strerror (errno)); |
120 | } |
151 | } |
121 | |
152 | |