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1 | c7f74643 | bellard | /*
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2 | c7f74643 | bellard | * tftp.c - a simple, read-only tftp server for qemu
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3 | 5fafdf24 | ths | *
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4 | c7f74643 | bellard | * Copyright (c) 2004 Magnus Damm <damm@opensource.se>
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5 | 5fafdf24 | ths | *
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6 | c7f74643 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | c7f74643 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | c7f74643 | bellard | * in the Software without restriction, including without limitation the rights
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9 | c7f74643 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | c7f74643 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | c7f74643 | bellard | * furnished to do so, subject to the following conditions:
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12 | c7f74643 | bellard | *
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13 | c7f74643 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | c7f74643 | bellard | * all copies or substantial portions of the Software.
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15 | c7f74643 | bellard | *
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16 | c7f74643 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | c7f74643 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | c7f74643 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | c7f74643 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | c7f74643 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | c7f74643 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | c7f74643 | bellard | * THE SOFTWARE.
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23 | c7f74643 | bellard | */
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24 | c7f74643 | bellard | |
25 | c7f74643 | bellard | #include <slirp.h> |
26 | 0d62c4cf | Jan Kiszka | #include "qemu-common.h" |
27 | c7f74643 | bellard | |
28 | 460fec67 | Jan Kiszka | static inline int tftp_session_in_use(struct tftp_session *spt) |
29 | 460fec67 | Jan Kiszka | { |
30 | 460fec67 | Jan Kiszka | return (spt->slirp != NULL); |
31 | 460fec67 | Jan Kiszka | } |
32 | c7f74643 | bellard | |
33 | 460fec67 | Jan Kiszka | static inline void tftp_session_update(struct tftp_session *spt) |
34 | c7f74643 | bellard | { |
35 | a3504c87 | bellard | spt->timestamp = curtime; |
36 | c7f74643 | bellard | } |
37 | c7f74643 | bellard | |
38 | c7f74643 | bellard | static void tftp_session_terminate(struct tftp_session *spt) |
39 | c7f74643 | bellard | { |
40 | 78be0566 | Hervé Poussineau | if (spt->fd >= 0) { |
41 | 78be0566 | Hervé Poussineau | close(spt->fd); |
42 | 78be0566 | Hervé Poussineau | spt->fd = -1;
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43 | 78be0566 | Hervé Poussineau | } |
44 | 7267c094 | Anthony Liguori | g_free(spt->filename); |
45 | 460fec67 | Jan Kiszka | spt->slirp = NULL;
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46 | c7f74643 | bellard | } |
47 | c7f74643 | bellard | |
48 | 460fec67 | Jan Kiszka | static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp) |
49 | c7f74643 | bellard | { |
50 | c7f74643 | bellard | struct tftp_session *spt;
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51 | c7f74643 | bellard | int k;
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52 | c7f74643 | bellard | |
53 | c7f74643 | bellard | for (k = 0; k < TFTP_SESSIONS_MAX; k++) { |
54 | 460fec67 | Jan Kiszka | spt = &slirp->tftp_sessions[k]; |
55 | c7f74643 | bellard | |
56 | 460fec67 | Jan Kiszka | if (!tftp_session_in_use(spt))
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57 | a3504c87 | bellard | goto found;
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58 | c7f74643 | bellard | |
59 | c7f74643 | bellard | /* sessions time out after 5 inactive seconds */
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60 | 9367964a | Jan Kiszka | if ((int)(curtime - spt->timestamp) > 5000) { |
61 | 78be0566 | Hervé Poussineau | tftp_session_terminate(spt); |
62 | a3504c87 | bellard | goto found;
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63 | 9367964a | Jan Kiszka | } |
64 | c7f74643 | bellard | } |
65 | c7f74643 | bellard | |
66 | c7f74643 | bellard | return -1; |
67 | c7f74643 | bellard | |
68 | c7f74643 | bellard | found:
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69 | c7f74643 | bellard | memset(spt, 0, sizeof(*spt)); |
70 | c7f74643 | bellard | memcpy(&spt->client_ip, &tp->ip.ip_src, sizeof(spt->client_ip));
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71 | 78be0566 | Hervé Poussineau | spt->fd = -1;
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72 | c7f74643 | bellard | spt->client_port = tp->udp.uh_sport; |
73 | 460fec67 | Jan Kiszka | spt->slirp = slirp; |
74 | c7f74643 | bellard | |
75 | c7f74643 | bellard | tftp_session_update(spt); |
76 | c7f74643 | bellard | |
77 | c7f74643 | bellard | return k;
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78 | c7f74643 | bellard | } |
79 | c7f74643 | bellard | |
80 | 460fec67 | Jan Kiszka | static int tftp_session_find(Slirp *slirp, struct tftp_t *tp) |
81 | c7f74643 | bellard | { |
82 | c7f74643 | bellard | struct tftp_session *spt;
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83 | c7f74643 | bellard | int k;
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84 | c7f74643 | bellard | |
85 | c7f74643 | bellard | for (k = 0; k < TFTP_SESSIONS_MAX; k++) { |
86 | 460fec67 | Jan Kiszka | spt = &slirp->tftp_sessions[k]; |
87 | c7f74643 | bellard | |
88 | 460fec67 | Jan Kiszka | if (tftp_session_in_use(spt)) {
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89 | c7f74643 | bellard | if (!memcmp(&spt->client_ip, &tp->ip.ip_src, sizeof(spt->client_ip))) { |
90 | c7f74643 | bellard | if (spt->client_port == tp->udp.uh_sport) {
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91 | c7f74643 | bellard | return k;
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92 | c7f74643 | bellard | } |
93 | c7f74643 | bellard | } |
94 | c7f74643 | bellard | } |
95 | c7f74643 | bellard | } |
96 | c7f74643 | bellard | |
97 | c7f74643 | bellard | return -1; |
98 | c7f74643 | bellard | } |
99 | c7f74643 | bellard | |
100 | 4aa401f3 | Hervé Poussineau | static int tftp_read_data(struct tftp_session *spt, uint32_t block_nr, |
101 | b6dce92e | Stefan Weil | uint8_t *buf, int len)
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102 | c7f74643 | bellard | { |
103 | 78be0566 | Hervé Poussineau | int bytes_read = 0; |
104 | c7f74643 | bellard | |
105 | 78be0566 | Hervé Poussineau | if (spt->fd < 0) { |
106 | 78be0566 | Hervé Poussineau | spt->fd = open(spt->filename, O_RDONLY | O_BINARY); |
107 | 78be0566 | Hervé Poussineau | } |
108 | c7f74643 | bellard | |
109 | 78be0566 | Hervé Poussineau | if (spt->fd < 0) { |
110 | 78be0566 | Hervé Poussineau | return -1; |
111 | 78be0566 | Hervé Poussineau | } |
112 | c7f74643 | bellard | |
113 | 78be0566 | Hervé Poussineau | if (len) {
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114 | 78be0566 | Hervé Poussineau | lseek(spt->fd, block_nr * 512, SEEK_SET);
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115 | c7f74643 | bellard | |
116 | 78be0566 | Hervé Poussineau | bytes_read = read(spt->fd, buf, len); |
117 | 78be0566 | Hervé Poussineau | } |
118 | c7f74643 | bellard | |
119 | 78be0566 | Hervé Poussineau | return bytes_read;
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120 | c7f74643 | bellard | } |
121 | c7f74643 | bellard | |
122 | 5fafdf24 | ths | static int tftp_send_oack(struct tftp_session *spt, |
123 | 95b1ad7a | Hervé Poussineau | const char *keys[], uint32_t values[], int nb, |
124 | 1f697db9 | ths | struct tftp_t *recv_tp)
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125 | 1f697db9 | ths | { |
126 | 1f697db9 | ths | struct sockaddr_in saddr, daddr;
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127 | 1f697db9 | ths | struct mbuf *m;
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128 | 1f697db9 | ths | struct tftp_t *tp;
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129 | 95b1ad7a | Hervé Poussineau | int i, n = 0; |
130 | 1f697db9 | ths | |
131 | 460fec67 | Jan Kiszka | m = m_get(spt->slirp); |
132 | 1f697db9 | ths | |
133 | 1f697db9 | ths | if (!m)
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134 | 1f697db9 | ths | return -1; |
135 | 1f697db9 | ths | |
136 | 1f697db9 | ths | memset(m->m_data, 0, m->m_size);
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137 | 1f697db9 | ths | |
138 | 9634d903 | blueswir1 | m->m_data += IF_MAXLINKHDR; |
139 | 1f697db9 | ths | tp = (void *)m->m_data;
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140 | 1f697db9 | ths | m->m_data += sizeof(struct udpiphdr); |
141 | 3b46e624 | ths | |
142 | 1f697db9 | ths | tp->tp_op = htons(TFTP_OACK); |
143 | 95b1ad7a | Hervé Poussineau | for (i = 0; i < nb; i++) { |
144 | 95b1ad7a | Hervé Poussineau | n += snprintf(tp->x.tp_buf + n, sizeof(tp->x.tp_buf) - n, "%s", |
145 | 95b1ad7a | Hervé Poussineau | keys[i]) + 1;
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146 | 95b1ad7a | Hervé Poussineau | n += snprintf(tp->x.tp_buf + n, sizeof(tp->x.tp_buf) - n, "%u", |
147 | 95b1ad7a | Hervé Poussineau | values[i]) + 1;
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148 | 95b1ad7a | Hervé Poussineau | } |
149 | 1f697db9 | ths | |
150 | 1f697db9 | ths | saddr.sin_addr = recv_tp->ip.ip_dst; |
151 | 1f697db9 | ths | saddr.sin_port = recv_tp->udp.uh_dport; |
152 | 3b46e624 | ths | |
153 | 1f697db9 | ths | daddr.sin_addr = spt->client_ip; |
154 | 1f697db9 | ths | daddr.sin_port = spt->client_port; |
155 | 1f697db9 | ths | |
156 | 5fafdf24 | ths | m->m_len = sizeof(struct tftp_t) - 514 + n - |
157 | 1f697db9 | ths | sizeof(struct ip) - sizeof(struct udphdr); |
158 | 1f697db9 | ths | udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY);
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159 | 1f697db9 | ths | |
160 | 1f697db9 | ths | return 0; |
161 | 1f697db9 | ths | } |
162 | 1f697db9 | ths | |
163 | ef2d54d8 | Jan Kiszka | static void tftp_send_error(struct tftp_session *spt, |
164 | b6dce92e | Stefan Weil | uint16_t errorcode, const char *msg, |
165 | ef2d54d8 | Jan Kiszka | struct tftp_t *recv_tp)
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166 | c7f74643 | bellard | { |
167 | c7f74643 | bellard | struct sockaddr_in saddr, daddr;
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168 | c7f74643 | bellard | struct mbuf *m;
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169 | c7f74643 | bellard | struct tftp_t *tp;
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170 | c7f74643 | bellard | |
171 | 460fec67 | Jan Kiszka | m = m_get(spt->slirp); |
172 | c7f74643 | bellard | |
173 | c7f74643 | bellard | if (!m) {
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174 | ef2d54d8 | Jan Kiszka | goto out;
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175 | c7f74643 | bellard | } |
176 | c7f74643 | bellard | |
177 | c7f74643 | bellard | memset(m->m_data, 0, m->m_size);
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178 | c7f74643 | bellard | |
179 | 9634d903 | blueswir1 | m->m_data += IF_MAXLINKHDR; |
180 | c7f74643 | bellard | tp = (void *)m->m_data;
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181 | c7f74643 | bellard | m->m_data += sizeof(struct udpiphdr); |
182 | 3b46e624 | ths | |
183 | c7f74643 | bellard | tp->tp_op = htons(TFTP_ERROR); |
184 | c7f74643 | bellard | tp->x.tp_error.tp_error_code = htons(errorcode); |
185 | b55266b5 | blueswir1 | pstrcpy((char *)tp->x.tp_error.tp_msg, sizeof(tp->x.tp_error.tp_msg), msg); |
186 | c7f74643 | bellard | |
187 | c7f74643 | bellard | saddr.sin_addr = recv_tp->ip.ip_dst; |
188 | c7f74643 | bellard | saddr.sin_port = recv_tp->udp.uh_dport; |
189 | c7f74643 | bellard | |
190 | c7f74643 | bellard | daddr.sin_addr = spt->client_ip; |
191 | c7f74643 | bellard | daddr.sin_port = spt->client_port; |
192 | c7f74643 | bellard | |
193 | 5fafdf24 | ths | m->m_len = sizeof(struct tftp_t) - 514 + 3 + strlen(msg) - |
194 | c7f74643 | bellard | sizeof(struct ip) - sizeof(struct udphdr); |
195 | c7f74643 | bellard | |
196 | c7f74643 | bellard | udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY);
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197 | c7f74643 | bellard | |
198 | ef2d54d8 | Jan Kiszka | out:
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199 | c7f74643 | bellard | tftp_session_terminate(spt); |
200 | c7f74643 | bellard | } |
201 | c7f74643 | bellard | |
202 | eb7faf0e | Jan Kiszka | static void tftp_send_next_block(struct tftp_session *spt, |
203 | eb7faf0e | Jan Kiszka | struct tftp_t *recv_tp)
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204 | c7f74643 | bellard | { |
205 | c7f74643 | bellard | struct sockaddr_in saddr, daddr;
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206 | c7f74643 | bellard | struct mbuf *m;
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207 | c7f74643 | bellard | struct tftp_t *tp;
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208 | c7f74643 | bellard | int nobytes;
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209 | c7f74643 | bellard | |
210 | 460fec67 | Jan Kiszka | m = m_get(spt->slirp); |
211 | c7f74643 | bellard | |
212 | c7f74643 | bellard | if (!m) {
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213 | eb7faf0e | Jan Kiszka | return;
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214 | c7f74643 | bellard | } |
215 | c7f74643 | bellard | |
216 | c7f74643 | bellard | memset(m->m_data, 0, m->m_size);
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217 | c7f74643 | bellard | |
218 | 9634d903 | blueswir1 | m->m_data += IF_MAXLINKHDR; |
219 | c7f74643 | bellard | tp = (void *)m->m_data;
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220 | c7f74643 | bellard | m->m_data += sizeof(struct udpiphdr); |
221 | 3b46e624 | ths | |
222 | c7f74643 | bellard | tp->tp_op = htons(TFTP_DATA); |
223 | 4aa401f3 | Hervé Poussineau | tp->x.tp_data.tp_block_nr = htons((spt->block_nr + 1) & 0xffff); |
224 | c7f74643 | bellard | |
225 | c7f74643 | bellard | saddr.sin_addr = recv_tp->ip.ip_dst; |
226 | c7f74643 | bellard | saddr.sin_port = recv_tp->udp.uh_dport; |
227 | c7f74643 | bellard | |
228 | c7f74643 | bellard | daddr.sin_addr = spt->client_ip; |
229 | c7f74643 | bellard | daddr.sin_port = spt->client_port; |
230 | c7f74643 | bellard | |
231 | 4aa401f3 | Hervé Poussineau | nobytes = tftp_read_data(spt, spt->block_nr, tp->x.tp_data.tp_buf, 512);
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232 | c7f74643 | bellard | |
233 | c7f74643 | bellard | if (nobytes < 0) { |
234 | c7f74643 | bellard | m_free(m); |
235 | c7f74643 | bellard | |
236 | c7f74643 | bellard | /* send "file not found" error back */
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237 | c7f74643 | bellard | |
238 | c7f74643 | bellard | tftp_send_error(spt, 1, "File not found", tp); |
239 | c7f74643 | bellard | |
240 | eb7faf0e | Jan Kiszka | return;
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241 | c7f74643 | bellard | } |
242 | c7f74643 | bellard | |
243 | 5fafdf24 | ths | m->m_len = sizeof(struct tftp_t) - (512 - nobytes) - |
244 | c7f74643 | bellard | sizeof(struct ip) - sizeof(struct udphdr); |
245 | c7f74643 | bellard | |
246 | c7f74643 | bellard | udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY);
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247 | c7f74643 | bellard | |
248 | c7f74643 | bellard | if (nobytes == 512) { |
249 | c7f74643 | bellard | tftp_session_update(spt); |
250 | c7f74643 | bellard | } |
251 | c7f74643 | bellard | else {
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252 | c7f74643 | bellard | tftp_session_terminate(spt); |
253 | c7f74643 | bellard | } |
254 | c7f74643 | bellard | |
255 | 4aa401f3 | Hervé Poussineau | spt->block_nr++; |
256 | c7f74643 | bellard | } |
257 | c7f74643 | bellard | |
258 | 460fec67 | Jan Kiszka | static void tftp_handle_rrq(Slirp *slirp, struct tftp_t *tp, int pktlen) |
259 | c7f74643 | bellard | { |
260 | c7f74643 | bellard | struct tftp_session *spt;
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261 | 20c24bf2 | Jan Kiszka | int s, k;
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262 | 9367964a | Jan Kiszka | size_t prefix_len; |
263 | 20c24bf2 | Jan Kiszka | char *req_fname;
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264 | 95b1ad7a | Hervé Poussineau | const char *option_name[2]; |
265 | 95b1ad7a | Hervé Poussineau | uint32_t option_value[2];
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266 | 95b1ad7a | Hervé Poussineau | int nb_options = 0; |
267 | c7f74643 | bellard | |
268 | bfe4e172 | Thomas Horsten | /* check if a session already exists and if so terminate it */
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269 | bfe4e172 | Thomas Horsten | s = tftp_session_find(slirp, tp); |
270 | bfe4e172 | Thomas Horsten | if (s >= 0) { |
271 | bfe4e172 | Thomas Horsten | tftp_session_terminate(&slirp->tftp_sessions[s]); |
272 | bfe4e172 | Thomas Horsten | } |
273 | bfe4e172 | Thomas Horsten | |
274 | 460fec67 | Jan Kiszka | s = tftp_session_allocate(slirp, tp); |
275 | c7f74643 | bellard | |
276 | c7f74643 | bellard | if (s < 0) { |
277 | c7f74643 | bellard | return;
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278 | c7f74643 | bellard | } |
279 | c7f74643 | bellard | |
280 | 460fec67 | Jan Kiszka | spt = &slirp->tftp_sessions[s]; |
281 | c7f74643 | bellard | |
282 | f8e3cbd3 | Jan Kiszka | /* unspecifed prefix means service disabled */
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283 | 460fec67 | Jan Kiszka | if (!slirp->tftp_prefix) {
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284 | f8e3cbd3 | Jan Kiszka | tftp_send_error(spt, 2, "Access violation", tp); |
285 | f8e3cbd3 | Jan Kiszka | return;
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286 | f8e3cbd3 | Jan Kiszka | } |
287 | f8e3cbd3 | Jan Kiszka | |
288 | 20c24bf2 | Jan Kiszka | /* skip header fields */
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289 | 20c24bf2 | Jan Kiszka | k = 0;
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290 | 89d2d3af | Stefan Weil | pktlen -= offsetof(struct tftp_t, x.tp_buf);
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291 | c7f74643 | bellard | |
292 | 9367964a | Jan Kiszka | /* prepend tftp_prefix */
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293 | 460fec67 | Jan Kiszka | prefix_len = strlen(slirp->tftp_prefix); |
294 | 7267c094 | Anthony Liguori | spt->filename = g_malloc(prefix_len + TFTP_FILENAME_MAX + 2);
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295 | 460fec67 | Jan Kiszka | memcpy(spt->filename, slirp->tftp_prefix, prefix_len); |
296 | 74efd61a | Jan Kiszka | spt->filename[prefix_len] = '/';
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297 | 9367964a | Jan Kiszka | |
298 | c7f74643 | bellard | /* get name */
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299 | 74efd61a | Jan Kiszka | req_fname = spt->filename + prefix_len + 1;
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300 | c7f74643 | bellard | |
301 | 20c24bf2 | Jan Kiszka | while (1) { |
302 | 20c24bf2 | Jan Kiszka | if (k >= TFTP_FILENAME_MAX || k >= pktlen) {
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303 | 20c24bf2 | Jan Kiszka | tftp_send_error(spt, 2, "Access violation", tp); |
304 | c7f74643 | bellard | return;
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305 | c7f74643 | bellard | } |
306 | 89d2d3af | Stefan Weil | req_fname[k] = tp->x.tp_buf[k]; |
307 | 20c24bf2 | Jan Kiszka | if (req_fname[k++] == '\0') { |
308 | c7f74643 | bellard | break;
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309 | c7f74643 | bellard | } |
310 | c7f74643 | bellard | } |
311 | 3b46e624 | ths | |
312 | c7f74643 | bellard | /* check mode */
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313 | 20c24bf2 | Jan Kiszka | if ((pktlen - k) < 6) { |
314 | 20c24bf2 | Jan Kiszka | tftp_send_error(spt, 2, "Access violation", tp); |
315 | c7f74643 | bellard | return;
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316 | c7f74643 | bellard | } |
317 | 3b46e624 | ths | |
318 | 89d2d3af | Stefan Weil | if (strcasecmp(&tp->x.tp_buf[k], "octet") != 0) { |
319 | c7f74643 | bellard | tftp_send_error(spt, 4, "Unsupported transfer mode", tp); |
320 | c7f74643 | bellard | return;
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321 | c7f74643 | bellard | } |
322 | c7f74643 | bellard | |
323 | 1f697db9 | ths | k += 6; /* skipping octet */ |
324 | 1f697db9 | ths | |
325 | c7f74643 | bellard | /* do sanity checks on the filename */
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326 | 74efd61a | Jan Kiszka | if (!strncmp(req_fname, "../", 3) || |
327 | 74efd61a | Jan Kiszka | req_fname[strlen(req_fname) - 1] == '/' || |
328 | 9367964a | Jan Kiszka | strstr(req_fname, "/../")) {
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329 | c7f74643 | bellard | tftp_send_error(spt, 2, "Access violation", tp); |
330 | c7f74643 | bellard | return;
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331 | c7f74643 | bellard | } |
332 | c7f74643 | bellard | |
333 | c7f74643 | bellard | /* check if the file exists */
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334 | 20c24bf2 | Jan Kiszka | if (tftp_read_data(spt, 0, NULL, 0) < 0) { |
335 | c7f74643 | bellard | tftp_send_error(spt, 1, "File not found", tp); |
336 | c7f74643 | bellard | return;
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337 | c7f74643 | bellard | } |
338 | c7f74643 | bellard | |
339 | 20c24bf2 | Jan Kiszka | if (tp->x.tp_buf[pktlen - 1] != 0) { |
340 | 1f697db9 | ths | tftp_send_error(spt, 2, "Access violation", tp); |
341 | 1f697db9 | ths | return;
|
342 | 1f697db9 | ths | } |
343 | 1f697db9 | ths | |
344 | 95b1ad7a | Hervé Poussineau | while (k < pktlen && nb_options < ARRAY_SIZE(option_name)) {
|
345 | 1f697db9 | ths | const char *key, *value; |
346 | 1f697db9 | ths | |
347 | 89d2d3af | Stefan Weil | key = &tp->x.tp_buf[k]; |
348 | 1f697db9 | ths | k += strlen(key) + 1;
|
349 | 1f697db9 | ths | |
350 | 20c24bf2 | Jan Kiszka | if (k >= pktlen) {
|
351 | 1f697db9 | ths | tftp_send_error(spt, 2, "Access violation", tp); |
352 | 1f697db9 | ths | return;
|
353 | 1f697db9 | ths | } |
354 | 1f697db9 | ths | |
355 | 89d2d3af | Stefan Weil | value = &tp->x.tp_buf[k]; |
356 | 1f697db9 | ths | k += strlen(value) + 1;
|
357 | 1f697db9 | ths | |
358 | facf1a60 | Sergei Gavrikov | if (strcasecmp(key, "tsize") == 0) { |
359 | 1f697db9 | ths | int tsize = atoi(value);
|
360 | 1f697db9 | ths | struct stat stat_p;
|
361 | 1f697db9 | ths | |
362 | f8e3cbd3 | Jan Kiszka | if (tsize == 0) { |
363 | 9367964a | Jan Kiszka | if (stat(spt->filename, &stat_p) == 0) |
364 | 1f697db9 | ths | tsize = stat_p.st_size; |
365 | 1f697db9 | ths | else {
|
366 | 1f697db9 | ths | tftp_send_error(spt, 1, "File not found", tp); |
367 | 1f697db9 | ths | return;
|
368 | 1f697db9 | ths | } |
369 | 1f697db9 | ths | } |
370 | 1f697db9 | ths | |
371 | 95b1ad7a | Hervé Poussineau | option_name[nb_options] = "tsize";
|
372 | 95b1ad7a | Hervé Poussineau | option_value[nb_options] = tsize; |
373 | 95b1ad7a | Hervé Poussineau | nb_options++; |
374 | 95b1ad7a | Hervé Poussineau | } else if (strcasecmp(key, "blksize") == 0) { |
375 | 95b1ad7a | Hervé Poussineau | int blksize = atoi(value);
|
376 | 95b1ad7a | Hervé Poussineau | |
377 | 95b1ad7a | Hervé Poussineau | /* If blksize option is bigger than what we will
|
378 | 95b1ad7a | Hervé Poussineau | * emit, accept the option with our packet size.
|
379 | 95b1ad7a | Hervé Poussineau | * Otherwise, simply do as we didn't see the option.
|
380 | 95b1ad7a | Hervé Poussineau | */
|
381 | 95b1ad7a | Hervé Poussineau | if (blksize >= 512) { |
382 | 95b1ad7a | Hervé Poussineau | option_name[nb_options] = "blksize";
|
383 | 95b1ad7a | Hervé Poussineau | option_value[nb_options] = 512;
|
384 | 95b1ad7a | Hervé Poussineau | nb_options++; |
385 | 95b1ad7a | Hervé Poussineau | } |
386 | 1f697db9 | ths | } |
387 | 1f697db9 | ths | } |
388 | 1f697db9 | ths | |
389 | 95b1ad7a | Hervé Poussineau | if (nb_options > 0) { |
390 | 95b1ad7a | Hervé Poussineau | assert(nb_options <= ARRAY_SIZE(option_name)); |
391 | 95b1ad7a | Hervé Poussineau | tftp_send_oack(spt, option_name, option_value, nb_options, tp); |
392 | 95b1ad7a | Hervé Poussineau | return;
|
393 | 95b1ad7a | Hervé Poussineau | } |
394 | 95b1ad7a | Hervé Poussineau | |
395 | 4aa401f3 | Hervé Poussineau | spt->block_nr = 0;
|
396 | 4aa401f3 | Hervé Poussineau | tftp_send_next_block(spt, tp); |
397 | c7f74643 | bellard | } |
398 | c7f74643 | bellard | |
399 | 460fec67 | Jan Kiszka | static void tftp_handle_ack(Slirp *slirp, struct tftp_t *tp, int pktlen) |
400 | c7f74643 | bellard | { |
401 | c7f74643 | bellard | int s;
|
402 | c7f74643 | bellard | |
403 | 460fec67 | Jan Kiszka | s = tftp_session_find(slirp, tp); |
404 | c7f74643 | bellard | |
405 | c7f74643 | bellard | if (s < 0) { |
406 | c7f74643 | bellard | return;
|
407 | c7f74643 | bellard | } |
408 | c7f74643 | bellard | |
409 | eb7faf0e | Jan Kiszka | tftp_send_next_block(&slirp->tftp_sessions[s], tp); |
410 | c7f74643 | bellard | } |
411 | c7f74643 | bellard | |
412 | bfe4e172 | Thomas Horsten | static void tftp_handle_error(Slirp *slirp, struct tftp_t *tp, int pktlen) |
413 | bfe4e172 | Thomas Horsten | { |
414 | bfe4e172 | Thomas Horsten | int s;
|
415 | bfe4e172 | Thomas Horsten | |
416 | bfe4e172 | Thomas Horsten | s = tftp_session_find(slirp, tp); |
417 | bfe4e172 | Thomas Horsten | |
418 | bfe4e172 | Thomas Horsten | if (s < 0) { |
419 | bfe4e172 | Thomas Horsten | return;
|
420 | bfe4e172 | Thomas Horsten | } |
421 | bfe4e172 | Thomas Horsten | |
422 | bfe4e172 | Thomas Horsten | tftp_session_terminate(&slirp->tftp_sessions[s]); |
423 | bfe4e172 | Thomas Horsten | } |
424 | bfe4e172 | Thomas Horsten | |
425 | c7f74643 | bellard | void tftp_input(struct mbuf *m) |
426 | c7f74643 | bellard | { |
427 | c7f74643 | bellard | struct tftp_t *tp = (struct tftp_t *)m->m_data; |
428 | c7f74643 | bellard | |
429 | c7f74643 | bellard | switch(ntohs(tp->tp_op)) {
|
430 | c7f74643 | bellard | case TFTP_RRQ:
|
431 | 460fec67 | Jan Kiszka | tftp_handle_rrq(m->slirp, tp, m->m_len); |
432 | c7f74643 | bellard | break;
|
433 | c7f74643 | bellard | |
434 | c7f74643 | bellard | case TFTP_ACK:
|
435 | 460fec67 | Jan Kiszka | tftp_handle_ack(m->slirp, tp, m->m_len); |
436 | c7f74643 | bellard | break;
|
437 | bfe4e172 | Thomas Horsten | |
438 | bfe4e172 | Thomas Horsten | case TFTP_ERROR:
|
439 | bfe4e172 | Thomas Horsten | tftp_handle_error(m->slirp, tp, m->m_len); |
440 | bfe4e172 | Thomas Horsten | break;
|
441 | c7f74643 | bellard | } |
442 | c7f74643 | bellard | } |