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1 | #include <windows.h> |
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2 | #ifndef AUTO_WINSOCK |
3 | #ifdef WINSOCK_TWO |
4 | #include <winsock2.h> |
5 | #else |
6 | #include <winsock.h> |
7 | #endif |
8 | #endif |
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9 | #include <stdio.h> |
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10 | #include <ctype.h> |
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11 | |
12 | #include "putty.h" |
13 | |
14 | /* |
15 | * ldisc.c: PuTTY line disciplines |
16 | */ |
17 | |
18 | static void c_write (char *buf, int len) { |
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19 | while (len--) |
20 | c_write1(*buf++); |
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21 | } |
22 | |
23 | static char *term_buf = NULL; |
24 | static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; |
25 | |
26 | static int plen(unsigned char c) { |
27 | if ((c >= 32 && c <= 126) || |
28 | (c >= 160)) |
29 | return 1; |
30 | else if (c < 128) |
31 | return 2; /* ^x for some x */ |
32 | else |
33 | return 4; /* <XY> for hex XY */ |
34 | } |
35 | |
36 | static void pwrite(unsigned char c) { |
37 | if ((c >= 32 && c <= 126) || |
38 | (c >= 160)) { |
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39 | c_write1(c); |
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40 | } else if (c < 128) { |
41 | char cc[2]; |
42 | cc[1] = (c == 127 ? '?' : c + 0x40); |
43 | cc[0] = '^'; |
44 | c_write(cc, 2); |
45 | } else { |
46 | char cc[5]; |
47 | sprintf(cc, "<%02X>", c); |
48 | c_write(cc, 4); |
49 | } |
50 | } |
51 | |
52 | static void bsb(int n) { |
53 | while (n--) |
54 | c_write("\010 \010", 3); |
55 | } |
56 | |
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57 | #define CTRL(x) (x^'@') |
58 | |
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59 | static void term_send(char *buf, int len) { |
60 | while (len--) { |
61 | char c; |
62 | c = *buf++; |
63 | switch (term_quotenext ? ' ' : c) { |
64 | /* |
65 | * ^h/^?: delete one char and output one BSB |
66 | * ^w: delete, and output BSBs, to return to last space/nonspace |
67 | * boundary |
68 | * ^u: delete, and output BSBs, to return to BOL |
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69 | * ^c: Do a ^u then send a telnet IP |
70 | * ^z: Do a ^u then send a telnet SUSP |
71 | * ^\: Do a ^u then send a telnet ABORT |
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72 | * ^r: echo "^R\n" and redraw line |
73 | * ^v: quote next char |
74 | * ^d: if at BOL, end of file and close connection, else send line |
75 | * and reset to BOL |
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76 | * ^m: send line-plus-\r\n and reset to BOL |
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77 | */ |
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78 | case CTRL('H'): case CTRL('?'): /* backspace/delete */ |
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79 | if (term_buflen > 0) { |
80 | bsb(plen(term_buf[term_buflen-1])); |
81 | term_buflen--; |
82 | } |
83 | break; |
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84 | case CTRL('W'): /* delete word */ |
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85 | while (term_buflen > 0) { |
86 | bsb(plen(term_buf[term_buflen-1])); |
87 | term_buflen--; |
88 | if (term_buflen > 0 && |
89 | isspace(term_buf[term_buflen-1]) && |
90 | !isspace(term_buf[term_buflen])) |
91 | break; |
92 | } |
93 | break; |
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94 | case CTRL('U'): /* delete line */ |
95 | case CTRL('C'): /* Send IP */ |
96 | case CTRL('\\'): /* Quit */ |
97 | case CTRL('Z'): /* Suspend */ |
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98 | while (term_buflen > 0) { |
99 | bsb(plen(term_buf[term_buflen-1])); |
100 | term_buflen--; |
101 | } |
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102 | back->special (TS_EL); |
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103 | if( c == CTRL('C') ) back->special (TS_IP); |
104 | if( c == CTRL('Z') ) back->special (TS_SUSP); |
105 | if( c == CTRL('\\') ) back->special (TS_ABORT); |
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106 | break; |
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107 | case CTRL('R'): /* redraw line */ |
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108 | c_write("^R\r\n", 4); |
109 | { |
110 | int i; |
111 | for (i = 0; i < term_buflen; i++) |
112 | pwrite(term_buf[i]); |
113 | } |
114 | break; |
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115 | case CTRL('V'): /* quote next char */ |
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116 | term_quotenext = TRUE; |
117 | break; |
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118 | case CTRL('D'): /* logout or send */ |
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119 | if (term_buflen == 0) { |
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120 | back->special (TS_EOF); |
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121 | } else { |
122 | back->send(term_buf, term_buflen); |
123 | term_buflen = 0; |
124 | } |
125 | break; |
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126 | case CTRL('M'): /* send with newline */ |
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127 | if (term_buflen > 0) |
128 | back->send(term_buf, term_buflen); |
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129 | if (cfg.protocol == PROT_RAW) |
130 | back->send("\r\n", 2); |
131 | else |
132 | back->send("\r", 1); |
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133 | c_write("\r\n", 2); |
134 | term_buflen = 0; |
135 | break; |
136 | default: /* get to this label from ^V handler */ |
137 | if (term_buflen >= term_bufsiz) { |
138 | term_bufsiz = term_buflen + 256; |
139 | term_buf = saferealloc(term_buf, term_bufsiz); |
140 | } |
141 | term_buf[term_buflen++] = c; |
142 | pwrite(c); |
143 | term_quotenext = FALSE; |
144 | break; |
145 | } |
146 | } |
147 | } |
148 | |
149 | static void simple_send(char *buf, int len) { |
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150 | if( term_buflen != 0 ) |
151 | { |
152 | back->send(term_buf, term_buflen); |
153 | while (term_buflen > 0) { |
154 | bsb(plen(term_buf[term_buflen-1])); |
155 | term_buflen--; |
156 | } |
157 | } |
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158 | if (len > 0) |
159 | back->send(buf, len); |
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160 | } |
161 | |
162 | Ldisc ldisc_term = { term_send }; |
163 | Ldisc ldisc_simple = { simple_send }; |