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annotate packages/net/common/current/src/tftp_server.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents
children 42332443fea2
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1 //==========================================================================
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2 //
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3 // lib/tftp_server.c
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4 //
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5 // TFTP server support
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6 //
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7 //==========================================================================
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8 //####BSDCOPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 //
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12 // Portions of this software may have been derived from OpenBSD or other sources,
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13 // and are covered by the appropriate copyright disclaimers included herein.
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14 //
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15 // -------------------------------------------
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16 //
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17 //####BSDCOPYRIGHTEND####
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18 //==========================================================================
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19 //#####DESCRIPTIONBEGIN####
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20 //
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21 // Author(s): gthomas
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22 // Contributors: gthomas, hmt, andrew.lunn@ascom.ch (Andrew Lunn)
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23 // Date: 2000-04-06
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24 // Purpose:
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25 // Description:
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26 //
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27 //
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28 //####DESCRIPTIONEND####
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29 //
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30 //==========================================================================
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31
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32 // TFTP server support
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33
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34 #include <network.h> // Basic networking support
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35 #include <arpa/tftp.h> // TFTP protocol definitions
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36 #include <tftp_support.h> // TFTPD structures
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37 #include <cyg/kernel/kapi.h>
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38 #include <stdlib.h> // For malloc
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39
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40 #define nCYGOPT_NET_TFTP_SERVER_INSTRUMENT
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41 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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42
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43 struct subinfo {
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44 int rx;
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45 int rx_repeat;
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46 int rx_skip;
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47 int send;
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48 int resend;
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49 };
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50
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51 struct info {
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52 struct subinfo ack, data;
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53 int err_send;
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54 int total_transactions;
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55 };
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56
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57
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58 static struct info tftp_server_instrument = {
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59 { 0,0,0,0,0 },
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60 { 0,0,0,0,0 },
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61 0, 0,
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62 };
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63
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64 #endif // CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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65
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66 #define STACK_SIZE (((CYGNUM_HAL_STACK_SIZE_TYPICAL+(3*(SEGSIZE+sizeof(struct tftphdr)))) + CYGARC_ALIGNMENT-1) & ~(CYGARC_ALIGNMENT-1))
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67 static char *TFTP_tag = "TFTPD";
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68 struct tftp_server {
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69 char *tag;
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70 char stack[STACK_SIZE];
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71 cyg_thread thread_data;
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72 cyg_handle_t thread_handle;
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73 int port;
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74 struct tftpd_fileops *ops;
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75 };
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76
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77 static char * errmsg[] = {
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78 "Undefined error code", // 0 nothing defined
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79 "File not found", // 1 TFTP_ENOTFOUND
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80 "Access violation", // 2 TFTP_EACCESS
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81 "Disk full or allocation exceeded", // 3 TFTP_ENOSPACE
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82 "Illegal TFTP operation", // 4 TFTP_EBADOP
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83 "Unknown transfer ID", // 5 TFTP_EBADID
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84 "File already exists", // 6 TFTP_EEXISTS
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85 "No such user", // 7 TFTP_ENOUSER
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86 };
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87
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88 /* Send an error packet to the client */
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89 static void
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90 tftpd_send_error(int s, struct tftphdr * reply, int err,
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91 struct sockaddr_in *from_addr, int from_len)
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92 {
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93 CYG_ASSERT( 0 <= err, "err underflow" );
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94 CYG_ASSERT( sizeof(errmsg)/sizeof(errmsg[0]) > err, "err overflow" );
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95
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96 reply->th_opcode = htons(ERROR);
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97 reply->th_code = htons(err);
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98 if ( (0 > err) || (sizeof(errmsg)/sizeof(errmsg[0]) <= err) )
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99 err = 0; // Do not copy a random string from hyperspace
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100 strcpy(reply->th_msg, errmsg[err]);
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101 sendto(s, reply, 4+strlen(reply->th_msg)+1, 0,
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102 (struct sockaddr *)from_addr, from_len);
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103 }
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104
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105 //
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106 // Receive a file from the client
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107 //
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108 static void
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109 tftpd_write_file(struct tftp_server *server,
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110 struct tftphdr *hdr,
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111 struct sockaddr_in *from_addr, int from_len)
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112 {
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113 char data_out[SEGSIZE+sizeof(struct tftphdr)];
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114 char data_in[SEGSIZE+sizeof(struct tftphdr)];
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115 struct tftphdr *reply = (struct tftphdr *)data_out;
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116 struct tftphdr *response = (struct tftphdr *)data_in;
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117 int fd, block, len, ok, tries, closed, data_len, s;
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118 struct timeval timeout;
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119 fd_set fds;
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120 int total_timeouts = 0;
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121 struct sockaddr_in client_addr, local_addr;
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122 int client_len;
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123
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124 s = socket(AF_INET, SOCK_DGRAM, 0);
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125 if (s < 0) {
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126 diag_printf("TFTPD: can't open socket for 'write_file'\n");
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127 return;
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128 }
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129 memset((char *)&local_addr, 0, sizeof(local_addr));
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130 local_addr.sin_family = AF_INET;
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131 local_addr.sin_len = sizeof(local_addr);
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132 local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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133 local_addr.sin_port = htons(INADDR_ANY);
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134 if (bind(s, (struct sockaddr *)&local_addr, sizeof(local_addr)) < 0) {
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135 // Problem setting up my end
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136 diag_printf("TFTPD: can't bind to reply port for 'write_file'\n");
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137 close(s);
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138 return;
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139 }
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140 if ((fd = (server->ops->open)(hdr->th_stuff, O_WRONLY)) < 0) {
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parents:
diff changeset
141 tftpd_send_error(s,reply,TFTP_ENOTFOUND,from_addr, from_len);
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parents:
diff changeset
142 close(s);
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jlarmour
parents:
diff changeset
143 return;
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jlarmour
parents:
diff changeset
144 }
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parents:
diff changeset
145 ok = true;
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parents:
diff changeset
146 closed = false;
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parents:
diff changeset
147 block = 0;
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jlarmour
parents:
diff changeset
148 while (ok) {
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jlarmour
parents:
diff changeset
149 // Send ACK telling client he can send data
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diff changeset
150 reply->th_opcode = htons(ACK);
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diff changeset
151 reply->th_block = htons(block++); // postincrement
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152 for (tries = 0; tries < TFTP_RETRIES_MAX; tries++) {
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153 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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154 tftp_server_instrument.ack.send++;
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diff changeset
155 #endif
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diff changeset
156 sendto(s, reply, 4, 0, (struct sockaddr *)from_addr, from_len);
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diff changeset
157 repeat_select:
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diff changeset
158 timeout.tv_sec = TFTP_TIMEOUT_PERIOD;
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diff changeset
159 timeout.tv_usec = 0;
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diff changeset
160 FD_ZERO(&fds);
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diff changeset
161 FD_SET(s, &fds);
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diff changeset
162 if (select(s+1, &fds, 0, 0, &timeout) <= 0) {
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diff changeset
163 if (++total_timeouts > TFTP_TIMEOUT_MAX) {
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diff changeset
164 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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165 tftp_server_instrument.err_send++;
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diff changeset
166 #endif
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diff changeset
167 tftpd_send_error(s,reply,TFTP_EBADOP,from_addr, from_len);
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diff changeset
168 ok = false;
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diff changeset
169 break;
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diff changeset
170 }
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diff changeset
171 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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172 tftp_server_instrument.ack.resend++;
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diff changeset
173 #endif
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diff changeset
174 continue; // retry the send, using up one retry.
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diff changeset
175 }
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diff changeset
176 // Some data has arrived
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177 data_len = sizeof(data_in);
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178 client_len = sizeof(client_addr);
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diff changeset
179 if ((data_len = recvfrom(s, data_in, data_len, 0,
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diff changeset
180 (struct sockaddr *)&client_addr, &client_len)) < 0) {
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jlarmour
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diff changeset
181 // What happened? No data here!
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diff changeset
182 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
183 tftp_server_instrument.ack.resend++;
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diff changeset
184 #endif
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diff changeset
185 continue; // retry the send, using up one retry.
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diff changeset
186 }
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diff changeset
187 if (ntohs(response->th_opcode) == DATA &&
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diff changeset
188 ntohs(response->th_block) < block) {
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diff changeset
189 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
190 tftp_server_instrument.data.rx_repeat++;
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diff changeset
191 #endif
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diff changeset
192 // Then it is repeat DATA with an old block; listen again,
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diff changeset
193 // but do not repeat sending the current ack, and do not
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diff changeset
194 // use up a retry count. (we do re-send the ack if
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diff changeset
195 // subsequently we time out)
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diff changeset
196 goto repeat_select;
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diff changeset
197 }
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diff changeset
198 if (ntohs(response->th_opcode) == DATA &&
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diff changeset
199 ntohs(response->th_block) == block) {
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diff changeset
200 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
201 tftp_server_instrument.data.rx++;
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diff changeset
202 #endif
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jlarmour
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diff changeset
203 // Good data - write to file
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diff changeset
204 len = (server->ops->write)(fd, response->th_data, data_len-4);
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jlarmour
parents:
diff changeset
205 if (len < (data_len-4)) {
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jlarmour
parents:
diff changeset
206 // File is "full"
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diff changeset
207 tftpd_send_error(s,reply,TFTP_ENOSPACE,
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diff changeset
208 from_addr, from_len);
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diff changeset
209 ok = false; // Give up
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diff changeset
210 break; // out of the retries loop
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jlarmour
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diff changeset
211 }
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jlarmour
parents:
diff changeset
212 if (data_len < (SEGSIZE+4)) {
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jlarmour
parents:
diff changeset
213 // End of file
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jlarmour
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diff changeset
214 closed = true;
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jlarmour
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diff changeset
215 ok = false;
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jlarmour
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diff changeset
216 if ((server->ops->close)(fd) == -1) {
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diff changeset
217 tftpd_send_error(s,reply,TFTP_EACCESS,
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diff changeset
218 from_addr, from_len);
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diff changeset
219 break; // out of the retries loop
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jlarmour
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diff changeset
220 }
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jlarmour
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diff changeset
221 // Exception to the loop structure: we must ACK the last
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jlarmour
parents:
diff changeset
222 // packet, the one that implied EOF:
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diff changeset
223 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
224 tftp_server_instrument.ack.send++;
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diff changeset
225 #endif
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diff changeset
226 reply->th_opcode = htons(ACK);
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diff changeset
227 reply->th_block = htons(block++); // postincrement
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diff changeset
228 sendto(s, reply, 4, 0, (struct sockaddr *)from_addr, from_len);
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jlarmour
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diff changeset
229 break; // out of the retries loop
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diff changeset
230 }
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jlarmour
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diff changeset
231 // Happy! Break out of the retries loop.
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jlarmour
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diff changeset
232 break;
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jlarmour
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diff changeset
233 }
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jlarmour
parents:
diff changeset
234 // Otherwise, we got something we do not understand! So repeat
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jlarmour
parents:
diff changeset
235 // sending the current ACK, and use up a retry count.
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jlarmour
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diff changeset
236 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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parents:
diff changeset
237 if ( (ntohs(response->th_opcode) == DATA) )
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diff changeset
238 tftp_server_instrument.data.rx_skip++;
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jlarmour
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diff changeset
239 tftp_server_instrument.ack.resend++;
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jlarmour
parents:
diff changeset
240 #endif
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jlarmour
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diff changeset
241 } // End of the retries loop.
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jlarmour
parents:
diff changeset
242 if (TFTP_RETRIES_MAX <= tries) {
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jlarmour
parents:
diff changeset
243 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
244 tftp_server_instrument.err_send++;
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jlarmour
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diff changeset
245 #endif
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diff changeset
246 tftpd_send_error(s,reply,TFTP_EBADOP,from_addr, from_len);
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diff changeset
247 ok = false;
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diff changeset
248 }
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jlarmour
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diff changeset
249 }
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jlarmour
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diff changeset
250 close(s);
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jlarmour
parents:
diff changeset
251 if (!closed) {
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jlarmour
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diff changeset
252 (server->ops->close)(fd);
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jlarmour
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diff changeset
253 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
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diff changeset
254 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
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diff changeset
255
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
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diff changeset
256 //
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jlarmour
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diff changeset
257 // Send a file to the client
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jlarmour
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diff changeset
258 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
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diff changeset
259 static void
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diff changeset
260 tftpd_read_file(struct tftp_server *server,
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parents:
diff changeset
261 struct tftphdr *hdr,
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jlarmour
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diff changeset
262 struct sockaddr_in *from_addr, int from_len)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
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diff changeset
263 {
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diff changeset
264 char data_out[SEGSIZE+sizeof(struct tftphdr)];
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parents:
diff changeset
265 char data_in[SEGSIZE+sizeof(struct tftphdr)];
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diff changeset
266 struct tftphdr *reply = (struct tftphdr *)data_out;
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parents:
diff changeset
267 struct tftphdr *response = (struct tftphdr *)data_in;
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parents:
diff changeset
268 int fd, block, len, tries, ok, data_len, s;
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jlarmour
parents:
diff changeset
269 struct timeval timeout;
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jlarmour
parents:
diff changeset
270 fd_set fds;
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jlarmour
parents:
diff changeset
271 int total_timeouts = 0;
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jlarmour
parents:
diff changeset
272 struct sockaddr_in client_addr, local_addr;
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jlarmour
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diff changeset
273 int client_len;
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jlarmour
parents:
diff changeset
274
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diff changeset
275 s = socket(AF_INET, SOCK_DGRAM, 0);
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diff changeset
276 if (s < 0) {
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diff changeset
277 diag_printf("TFTPD: can't open socket for 'read_file'\n");
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
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parents:
diff changeset
278 return;
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jlarmour
parents:
diff changeset
279 }
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jlarmour
parents:
diff changeset
280 memset((char *)&local_addr, 0, sizeof(local_addr));
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jlarmour
parents:
diff changeset
281 local_addr.sin_family = AF_INET;
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jlarmour
parents:
diff changeset
282 local_addr.sin_len = sizeof(local_addr);
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jlarmour
parents:
diff changeset
283 local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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jlarmour
parents:
diff changeset
284 local_addr.sin_port = htons(INADDR_ANY);
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jlarmour
parents:
diff changeset
285 if (bind(s, (struct sockaddr *)&local_addr, sizeof(local_addr)) < 0) {
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jlarmour
parents:
diff changeset
286 // Problem setting up my end
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jlarmour
parents:
diff changeset
287 diag_printf("TFTPD: can't bind to reply port for 'read_file'\n");
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jlarmour
parents:
diff changeset
288 close(s);
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jlarmour
parents:
diff changeset
289 return;
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jlarmour
parents:
diff changeset
290 }
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jlarmour
parents:
diff changeset
291 if ((fd = (server->ops->open)(hdr->th_stuff, O_RDONLY)) < 0) {
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jlarmour
parents:
diff changeset
292 tftpd_send_error(s,reply,TFTP_ENOTFOUND,from_addr, from_len);
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jlarmour
parents:
diff changeset
293 close(s);
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jlarmour
parents:
diff changeset
294 return;
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jlarmour
parents:
diff changeset
295 }
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jlarmour
parents:
diff changeset
296 block = 0;
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jlarmour
parents:
diff changeset
297 ok = true;
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jlarmour
parents:
diff changeset
298 while (ok) {
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jlarmour
parents:
diff changeset
299 // Read next chunk of file
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diff changeset
300 len = (server->ops->read)(fd, reply->th_data, SEGSIZE);
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diff changeset
301 reply->th_block = htons(++block); // preincrement
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diff changeset
302 reply->th_opcode = htons(DATA);
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jlarmour
parents:
diff changeset
303 for (tries = 0; tries < TFTP_RETRIES_MAX; tries++) {
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diff changeset
304 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
305 tftp_server_instrument.data.send++;
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diff changeset
306 #endif
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diff changeset
307 if (sendto(s, reply, 4+len, 0,
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diff changeset
308 (struct sockaddr *)from_addr, from_len) < 0) {
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jlarmour
parents:
diff changeset
309 // Something went wrong with the network!
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diff changeset
310 ok = false;
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diff changeset
311 break;
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diff changeset
312 }
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diff changeset
313 repeat_select:
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diff changeset
314 timeout.tv_sec = TFTP_TIMEOUT_PERIOD;
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diff changeset
315 timeout.tv_usec = 0;
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jlarmour
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diff changeset
316 FD_ZERO(&fds);
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jlarmour
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diff changeset
317 FD_SET(s, &fds);
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jlarmour
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diff changeset
318 if (select(s+1, &fds, 0, 0, &timeout) <= 0) {
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jlarmour
parents:
diff changeset
319 if (++total_timeouts > TFTP_TIMEOUT_MAX) {
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diff changeset
320 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
321 tftp_server_instrument.err_send++;
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diff changeset
322 #endif
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diff changeset
323 tftpd_send_error(s,reply,TFTP_EBADOP,from_addr, from_len);
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diff changeset
324 ok = false;
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diff changeset
325 break;
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diff changeset
326 }
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jlarmour
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diff changeset
327 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
328 tftp_server_instrument.data.resend++;
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parents:
diff changeset
329 #endif
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diff changeset
330 continue; // retry the send, using up one retry.
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diff changeset
331 }
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diff changeset
332 data_len = sizeof(data_in);
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jlarmour
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diff changeset
333 client_len = sizeof(client_addr);
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jlarmour
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diff changeset
334 if ((data_len = recvfrom(s, data_in, data_len, 0,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
335 (struct sockaddr *)&client_addr,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
336 &client_len)) < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
337 // What happened? Maybe someone lied to us...
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jlarmour
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diff changeset
338 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
339 tftp_server_instrument.data.resend++;
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diff changeset
340 #endif
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diff changeset
341 continue; // retry the send, using up one retry.
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jlarmour
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diff changeset
342 }
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jlarmour
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diff changeset
343 if ((ntohs(response->th_opcode) == ACK) &&
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
344 (ntohs(response->th_block) < block)) {
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jlarmour
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diff changeset
345 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
346 tftp_server_instrument.ack.rx_repeat++;
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diff changeset
347 #endif
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jlarmour
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diff changeset
348 // Then it is a repeat ACK for an old block; listen again,
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jlarmour
parents:
diff changeset
349 // but do not repeat sending the current block, and do not
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jlarmour
parents:
diff changeset
350 // use up a retry count. (we do re-send the data if
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
351 // subsequently we time out)
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jlarmour
parents:
diff changeset
352 goto repeat_select;
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jlarmour
parents:
diff changeset
353 }
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jlarmour
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diff changeset
354 if ((ntohs(response->th_opcode) == ACK) &&
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
355 (ntohs(response->th_block) == block)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
356 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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jlarmour
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diff changeset
357 tftp_server_instrument.ack.rx++;
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jlarmour
parents:
diff changeset
358 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
359 // Happy! Break out of the retries loop.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
360 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
361 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
362 // Otherwise, we got something we do not understand! So repeat
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
363 // sending the current block, and use up a retry count.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
364 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
365 if ( (ntohs(response->th_opcode) == ACK) )
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
366 tftp_server_instrument.ack.rx_skip++;
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jlarmour
parents:
diff changeset
367 tftp_server_instrument.data.resend++;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
368 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
369 } // End of the retries loop.
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jlarmour
parents:
diff changeset
370 if (TFTP_RETRIES_MAX <= tries) {
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jlarmour
parents:
diff changeset
371 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
372 tftp_server_instrument.err_send++;
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jlarmour
parents:
diff changeset
373 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
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diff changeset
374 tftpd_send_error(s,reply,TFTP_EBADOP,from_addr, from_len);
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jlarmour
parents:
diff changeset
375 ok = false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
376 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
377 if (len < SEGSIZE) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
378 break; // That's end of file then.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
379 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
380 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
381 close(s);
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jlarmour
parents:
diff changeset
382 (server->ops->close)(fd);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
383 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
384
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
385 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
386 // Actual TFTP server
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
387 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
388 #define CYGSEM_TFTP_SERVER_MULTITHREADED
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
389 #ifdef CYGSEM_TFTP_SERVER_MULTITHREADED
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jlarmour
parents:
diff changeset
390 static cyg_sem_t tftp_server_sem;
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jlarmour
parents:
diff changeset
391 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
392
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
393 static void
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
394 tftpd_server(cyg_addrword_t p)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
395 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
396 struct tftp_server *server = (struct tftp_server *)p;
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jlarmour
parents:
diff changeset
397 int s;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
398 int data_len, recv_len, from_len;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
399 struct sockaddr_in local_addr, from_addr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
400 struct servent *server_info;
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jlarmour
parents:
diff changeset
401 char data[SEGSIZE+sizeof(struct tftphdr)];
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
402 struct tftphdr *hdr = (struct tftphdr *)data;
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jlarmour
parents:
diff changeset
403
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
404 #ifndef CYGPKG_NET_TESTS_USE_RT_TEST_HARNESS
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
405 // Otherwise routine printfs fail the test - interrupts disabled too long.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
406 diag_printf("TFTPD [%x]: port %d\n", p, server->port);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
407 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
408
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
409 // Set up port
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
410 if (server->port == 0) {
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jlarmour
parents:
diff changeset
411 server_info = getservbyname("tftp", "udp");
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jlarmour
parents:
diff changeset
412 if (server_info == (struct servent *)0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
413 diag_printf("TFTPD: can't get TFTP service information\n");
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jlarmour
parents:
diff changeset
414 return;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
415 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents:
diff changeset
416 // Network order in info; host order in server:
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jlarmour
parents:
diff changeset
417 server->port = ntohs( server_info->s_port );
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jlarmour
parents:
diff changeset
418 }
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jlarmour
parents:
diff changeset
419
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jlarmour
parents:
diff changeset
420 while (true) {
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jlarmour
parents:
diff changeset
421 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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parents:
diff changeset
422 struct info o = tftp_server_instrument;
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jlarmour
parents:
diff changeset
423 #endif
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jlarmour
parents:
diff changeset
424 // Create socket
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jlarmour
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diff changeset
425 s = socket(AF_INET, SOCK_DGRAM, 0);
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jlarmour
parents:
diff changeset
426 if (s < 0) {
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jlarmour
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diff changeset
427 diag_printf("TFTPD [%x]: can't open socket\n", p);
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jlarmour
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diff changeset
428 return;
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jlarmour
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diff changeset
429 }
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jlarmour
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diff changeset
430 memset((char *)&local_addr, 0, sizeof(local_addr));
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jlarmour
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diff changeset
431 local_addr.sin_family = AF_INET;
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jlarmour
parents:
diff changeset
432 local_addr.sin_len = sizeof(local_addr);
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jlarmour
parents:
diff changeset
433 local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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jlarmour
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diff changeset
434 local_addr.sin_port = htons(server->port);
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jlarmour
parents:
diff changeset
435 if (bind(s, (struct sockaddr *)&local_addr, sizeof(local_addr)) < 0) {
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jlarmour
parents:
diff changeset
436 // Problem setting up my end
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jlarmour
parents:
diff changeset
437 close(s);
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jlarmour
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diff changeset
438 #ifdef CYGSEM_TFTP_SERVER_MULTITHREADED
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439 #ifndef CYGPKG_NET_TESTS_USE_RT_TEST_HARNESS
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440 diag_printf("TFTPD [%x]: waiting to bind to service port\n", p);
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diff changeset
441 #endif
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diff changeset
442 // Wait until the socket is free...
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jlarmour
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443 cyg_semaphore_wait( &tftp_server_sem );
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diff changeset
444 continue; // try re-opening and rebinding the socket.
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diff changeset
445 #else
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diff changeset
446 diag_printf("TFTPD [%x]: can't bind to service port\n", p);
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diff changeset
447 return;
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diff changeset
448 #endif
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449 }
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diff changeset
450
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diff changeset
451 recv_len = sizeof(data);
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jlarmour
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diff changeset
452 from_len = sizeof(from_addr);
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jlarmour
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diff changeset
453 data_len = recvfrom(s, hdr, recv_len, 0,
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jlarmour
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diff changeset
454 (struct sockaddr *)&from_addr, &from_len);
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jlarmour
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diff changeset
455 close(s); // so that other servers can bind to the TFTP socket
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diff changeset
456 #ifdef CYGSEM_TFTP_SERVER_MULTITHREADED
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jlarmour
parents:
diff changeset
457 // The socket is free...
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jlarmour
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diff changeset
458 cyg_semaphore_post( &tftp_server_sem );
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jlarmour
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diff changeset
459 #endif
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diff changeset
460
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jlarmour
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diff changeset
461 if ( data_len < 0) {
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jlarmour
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diff changeset
462 diag_printf("TFTPD [%x]: can't read request\n", p);
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jlarmour
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diff changeset
463 } else {
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diff changeset
464 #ifndef CYGPKG_NET_TESTS_USE_RT_TEST_HARNESS
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465 diag_printf("TFTPD [%x]: received %x from %s:%d\n", p,
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diff changeset
466 ntohs(hdr->th_opcode), inet_ntoa(from_addr.sin_addr),
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jlarmour
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diff changeset
467 from_addr.sin_port);
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jlarmour
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diff changeset
468 #endif
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jlarmour
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diff changeset
469 switch (ntohs(hdr->th_opcode)) {
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jlarmour
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diff changeset
470 case WRQ:
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jlarmour
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diff changeset
471 tftpd_write_file(server, hdr, &from_addr, from_len);
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jlarmour
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diff changeset
472 break;
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jlarmour
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diff changeset
473 case RRQ:
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jlarmour
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diff changeset
474 tftpd_read_file(server, hdr, &from_addr, from_len);
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diff changeset
475 break;
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jlarmour
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diff changeset
476 case ACK:
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jlarmour
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diff changeset
477 case DATA:
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jlarmour
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diff changeset
478 case ERROR:
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jlarmour
parents:
diff changeset
479 // Ignore
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jlarmour
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diff changeset
480 break;
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jlarmour
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diff changeset
481 default:
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diff changeset
482 diag_printf("TFTPD [%x]: bogus request %x from %s:%d\n", p,
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jlarmour
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diff changeset
483 ntohs(hdr->th_opcode),
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jlarmour
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diff changeset
484 inet_ntoa(from_addr.sin_addr),
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diff changeset
485 from_addr.sin_port );
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jlarmour
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diff changeset
486 tftpd_send_error(s,hdr,TFTP_EBADOP,&from_addr,from_len);
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jlarmour
parents:
diff changeset
487 }
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jlarmour
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diff changeset
488 }
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jlarmour
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diff changeset
489 #ifdef CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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diff changeset
490 tftp_server_instrument.total_transactions++;
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jlarmour
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diff changeset
491
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jlarmour
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diff changeset
492 o.data.rx -= tftp_server_instrument.data.rx ;
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diff changeset
493 o.data.rx_repeat -= tftp_server_instrument.data.rx_repeat;
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parents:
diff changeset
494 o.data.rx_skip -= tftp_server_instrument.data.rx_skip ;
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jlarmour
parents:
diff changeset
495 o.data.send -= tftp_server_instrument.data.send ;
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jlarmour
parents:
diff changeset
496 o.data.resend -= tftp_server_instrument.data.resend ;
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jlarmour
parents:
diff changeset
497
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jlarmour
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diff changeset
498 o.ack.rx -= tftp_server_instrument.ack.rx ;
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jlarmour
parents:
diff changeset
499 o.ack.rx_repeat -= tftp_server_instrument.ack.rx_repeat ;
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parents:
diff changeset
500 o.ack.rx_skip -= tftp_server_instrument.ack.rx_skip ;
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jlarmour
parents:
diff changeset
501 o.ack.send -= tftp_server_instrument.ack.send ;
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jlarmour
parents:
diff changeset
502 o.ack.resend -= tftp_server_instrument.ack.resend ;
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jlarmour
parents:
diff changeset
503
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jlarmour
parents:
diff changeset
504 o.err_send -= tftp_server_instrument.err_send ;
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jlarmour
parents:
diff changeset
505
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jlarmour
parents:
diff changeset
506 #ifndef CYGPKG_NET_TESTS_USE_RT_TEST_HARNESS
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jlarmour
parents:
diff changeset
507 if ( o.data.rx ) diag_printf( "data rx %4d\n", -o.data.rx );
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jlarmour
parents:
diff changeset
508 if ( o.data.rx_repeat ) diag_printf( "data rx_repeat%4d\n", -o.data.rx_repeat );
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jlarmour
parents:
diff changeset
509 if ( o.data.rx_skip ) diag_printf( "data rx_skip %4d\n", -o.data.rx_skip );
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jlarmour
parents:
diff changeset
510 if ( o.data.send ) diag_printf( "data send %4d\n", -o.data.send );
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jlarmour
parents:
diff changeset
511 if ( o.data.resend ) diag_printf( "data resend %4d\n", -o.data.resend );
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jlarmour
parents:
diff changeset
512
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jlarmour
parents:
diff changeset
513 if ( o.ack.rx ) diag_printf( " ack rx %4d\n", -o.ack.rx );
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jlarmour
parents:
diff changeset
514 if ( o.ack.rx_repeat ) diag_printf( " ack rx_repeat%4d\n", -o.ack.rx_repeat );
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jlarmour
parents:
diff changeset
515 if ( o.ack.rx_skip ) diag_printf( " ack rx_skip %4d\n", -o.ack.rx_skip );
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jlarmour
parents:
diff changeset
516 if ( o.ack.send ) diag_printf( " ack send %4d\n", -o.ack.send );
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jlarmour
parents:
diff changeset
517 if ( o.ack.resend ) diag_printf( " ack resend %4d\n", -o.ack.resend );
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jlarmour
parents:
diff changeset
518
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jlarmour
parents:
diff changeset
519 if ( o.err_send ) diag_printf( "*error sends %4d\n", -o.err_send );
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jlarmour
parents:
diff changeset
520 #endif // CYGPKG_NET_TESTS_USE_RT_TEST_HARNESS
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jlarmour
parents:
diff changeset
521 #endif // CYGOPT_NET_TFTP_SERVER_INSTRUMENT
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jlarmour
parents:
diff changeset
522 }
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jlarmour
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diff changeset
523 }
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jlarmour
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diff changeset
524
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jlarmour
parents:
diff changeset
525 //
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jlarmour
parents:
diff changeset
526 // This function is used to create a new server [thread] which supports
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jlarmour
parents:
diff changeset
527 // the TFTP protocol on the given port. A server 'id' will be returned
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jlarmour
parents:
diff changeset
528 // which can later be used to destroy the server.
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jlarmour
parents:
diff changeset
529 //
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jlarmour
parents:
diff changeset
530 // Note: all [memory] resources for the server thread will be allocated
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jlarmour
parents:
diff changeset
531 // dynamically. If there are insufficient resources, an error will be
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jlarmour
parents:
diff changeset
532 // returned.
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jlarmour
parents:
diff changeset
533 //
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jlarmour
parents:
diff changeset
534 int
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jlarmour
parents:
diff changeset
535 tftpd_start(int port, struct tftpd_fileops *ops)
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jlarmour
parents:
diff changeset
536 {
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jlarmour
parents:
diff changeset
537 struct tftp_server *server;
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jlarmour
parents:
diff changeset
538 #ifdef CYGSEM_TFTP_SERVER_MULTITHREADED
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jlarmour
parents:
diff changeset
539 static char init = 0;
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jlarmour
parents:
diff changeset
540 if ( 0 == init ) {
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jlarmour
parents:
diff changeset
541 init++;
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jlarmour
parents:
diff changeset
542 cyg_semaphore_init( &tftp_server_sem, 0 );
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jlarmour
parents:
diff changeset
543 }
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jlarmour
parents:
diff changeset
544 #endif
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jlarmour
parents:
diff changeset
545
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jlarmour
parents:
diff changeset
546 if ((server = malloc(sizeof(struct tftp_server)))) {
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jlarmour
parents:
diff changeset
547 server->tag = TFTP_tag;
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jlarmour
parents:
diff changeset
548 server->port = port;
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jlarmour
parents:
diff changeset
549 server->ops = ops;
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jlarmour
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550 cyg_thread_create(CYGPKG_NET_TFTPD_THREAD_PRIORITY, // Priority
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551 tftpd_server, // entry
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552 (cyg_addrword_t)server, // entry parameter
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553 "TFTP server", // Name
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554 &server->stack[0], // Stack
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555 STACK_SIZE, // Size
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556 &server->thread_handle, // Handle
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557 &server->thread_data // Thread data structure
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558 );
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559 cyg_thread_resume(server->thread_handle); // Start it
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560
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561 }
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562 return (int)server;
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563 }
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564
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565 //
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566 // Destroy a TFTP server, using a previously created server 'id'.
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567 //
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568 int
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569 tftpd_stop(int p)
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570 {
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571 struct tftp_server *server = (struct tftp_server *)p;
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572 // Simple sanity check
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573 if (server->tag == TFTP_tag) {
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574 cyg_thread_kill(server->thread_handle);
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575 cyg_thread_set_priority(server->thread_handle, 0);
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576 cyg_thread_delay(1); // Make sure it gets to die...
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577 if (cyg_thread_delete(server->thread_handle)) {
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578 // Success shutting down the thread
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579 free(server); // Give up memory
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580 return 1;
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581 }
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582 }
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583 return 0;
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584 }
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585
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586 // EOF tftp_server.c