1 | /* |
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2 | * Oscar File transfer (OFT) and Oscar Direct Connect (ODC). |
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3 | * (ODC is also referred to as DirectIM and IM Image.) |
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4 | * |
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5 | * There are a few static helper functions at the top, then |
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6 | * ODC stuff, then ft stuff. |
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7 | * |
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8 | * I feel like this is a good place to explain OFT, so I'm going to |
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9 | * do just that. Each OFT packet has a header type. I guess this |
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10 | * is pretty similar to the subtype of a SNAC packet. The type |
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11 | * basically tells the other client the meaning of the OFT packet. |
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12 | * There are two distinct types of file transfer, which I usually |
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13 | * call "sendfile" and "getfile." Sendfile is when you send a file |
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14 | * to another AIM user. Getfile is when you share a group of files, |
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15 | * and other users request that you send them the files. |
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16 | * |
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17 | * A typical sendfile file transfer goes like this: |
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18 | * 1) Sender sends a channel 2 ICBM telling the other user that |
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19 | * we want to send them a file. At the same time, we open a |
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20 | * listener socket (this should be done before sending the |
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21 | * ICBM) on some port, and wait for them to connect to us. |
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22 | * The ICBM we sent should contain our IP address and the port |
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23 | * number that we're listening on. |
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24 | * 2) The receiver connects to the sender on the given IP address |
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25 | * and port. After the connection is established, the receiver |
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26 | * sends an ICBM signifying that we are ready and waiting. |
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27 | * 3) The sender sends an OFT PROMPT message over the OFT |
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28 | * connection. |
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29 | * 4) The receiver of the file sends back an exact copy of this |
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30 | * OFT packet, except the cookie is filled in with the cookie |
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31 | * from the ICBM. I think this might be an attempt to verify |
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32 | * that the user that is connected is actually the guy that |
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33 | * we sent the ICBM to. Oh, I've been calling this the ACK. |
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34 | * 5) The sender starts sending raw data across the connection |
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35 | * until the entire file has been sent. |
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36 | * 6) The receiver knows the file is finished because the sender |
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37 | * sent the file size in an earlier OFT packet. So then the |
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38 | * receiver sends the DONE thingy (after filling in the |
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39 | * "received" checksum and size) and closes the connection. |
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40 | */ |
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41 | |
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42 | #define FAIM_INTERNAL |
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43 | #ifdef HAVE_CONFIG_H |
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44 | #include <config.h> |
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45 | #endif |
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46 | |
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47 | #include <aim.h> |
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48 | |
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49 | #ifndef _WIN32 |
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50 | #include <stdio.h> |
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51 | #include <netdb.h> |
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52 | #include <sys/socket.h> |
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53 | #include <netinet/in.h> |
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54 | #include <sys/utsname.h> /* for aim_odc_initiate */ |
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55 | #include <arpa/inet.h> /* for inet_ntoa */ |
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56 | #define G_DIR_SEPARATOR '/' |
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57 | #endif |
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58 | |
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59 | #ifdef _WIN32 |
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60 | #include "win32dep.h" |
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61 | #endif |
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62 | |
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63 | struct aim_odc_intdata { |
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64 | fu8_t cookie[8]; |
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65 | char sn[MAXSNLEN+1]; |
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66 | char ip[22]; |
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67 | }; |
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68 | |
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69 | /** |
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70 | * Convert the directory separator from / (0x2f) to ^A (0x01) |
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71 | * |
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72 | * @param name The filename to convert. |
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73 | */ |
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74 | static void aim_oft_dirconvert_tostupid(char *name) |
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75 | { |
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76 | while (name[0]) { |
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77 | if (name[0] == 0x01) |
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78 | name[0] = G_DIR_SEPARATOR; |
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79 | name++; |
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80 | } |
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81 | } |
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82 | |
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83 | /** |
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84 | * Convert the directory separator from ^A (0x01) to / (0x2f) |
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85 | * |
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86 | * @param name The filename to convert. |
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87 | */ |
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88 | static void aim_oft_dirconvert_fromstupid(char *name) |
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89 | { |
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90 | while (name[0]) { |
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91 | if (name[0] == G_DIR_SEPARATOR) |
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92 | name[0] = 0x01; |
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93 | name++; |
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94 | } |
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95 | } |
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96 | |
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97 | /** |
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98 | * Calculate oft checksum of buffer |
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99 | * |
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100 | * Prevcheck should be 0xFFFF0000 when starting a checksum of a file. The |
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101 | * checksum is kind of a rolling checksum thing, so each time you get bytes |
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102 | * of a file you just call this puppy and it updates the checksum. You can |
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103 | * calculate the checksum of an entire file by calling this in a while or a |
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104 | * for loop, or something. |
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105 | * |
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106 | * Thanks to Graham Booker for providing this improved checksum routine, |
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107 | * which is simpler and should be more accurate than Josh Myer's original |
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108 | * code. -- wtm |
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109 | * |
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110 | * This algorithim works every time I have tried it. The other fails |
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111 | * sometimes. So, AOL who thought this up? It has got to be the weirdest |
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112 | * checksum I have ever seen. |
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113 | * |
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114 | * @param buffer Buffer of data to checksum. Man I'd like to buff her... |
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115 | * @param bufsize Size of buffer. |
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116 | * @param prevcheck Previous checksum. |
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117 | */ |
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118 | faim_export fu32_t aim_oft_checksum_chunk(const fu8_t *buffer, int bufferlen, fu32_t prevcheck) |
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119 | { |
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120 | fu32_t check = (prevcheck >> 16) & 0xffff, oldcheck; |
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121 | int i; |
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122 | unsigned short val; |
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123 | |
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124 | for (i=0; i<bufferlen; i++) { |
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125 | oldcheck = check; |
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126 | if (i&1) |
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127 | val = buffer[i]; |
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128 | else |
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129 | val = buffer[i] << 8; |
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130 | check -= val; |
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131 | /* |
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132 | * The following appears to be necessary.... It happens |
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133 | * every once in a while and the checksum doesn't fail. |
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134 | */ |
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135 | if (check > oldcheck) |
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136 | check--; |
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137 | } |
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138 | check = ((check & 0x0000ffff) + (check >> 16)); |
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139 | check = ((check & 0x0000ffff) + (check >> 16)); |
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140 | return check << 16; |
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141 | } |
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142 | |
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143 | faim_export fu32_t aim_oft_checksum_file(char *filename) { |
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144 | FILE *fd; |
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145 | fu32_t checksum = 0xffff0000; |
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146 | |
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147 | if ((fd = fopen(filename, "rb"))) { |
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148 | int bytes; |
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149 | fu8_t buffer[1024]; |
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150 | |
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151 | while ((bytes = fread(buffer, 1, 1024, fd))) |
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152 | checksum = aim_oft_checksum_chunk(buffer, bytes, checksum); |
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153 | fclose(fd); |
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154 | } |
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155 | |
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156 | return checksum; |
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157 | } |
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158 | |
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159 | /** |
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160 | * Create a listening socket on a given port. |
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161 | * |
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162 | * XXX - Give the client author the responsibility of setting up a |
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163 | * listener, then we no longer have a libfaim problem with broken |
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164 | * solaris *innocent smile* -- jbm |
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165 | * |
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166 | * @param portnum The port number to bind to. |
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167 | * @return The file descriptor of the listening socket. |
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168 | */ |
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169 | static int listenestablish(fu16_t portnum) |
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170 | { |
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171 | #if HAVE_GETADDRINFO |
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172 | int listenfd; |
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173 | const int on = 1; |
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174 | struct addrinfo hints, *res, *ressave; |
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175 | char serv[5]; |
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176 | |
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177 | snprintf(serv, sizeof(serv), "%d", portnum); |
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178 | memset(&hints, 0, sizeof(struct addrinfo)); |
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179 | hints.ai_flags = AI_PASSIVE; |
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180 | hints.ai_family = AF_UNSPEC; |
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181 | hints.ai_socktype = SOCK_STREAM; |
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182 | if (getaddrinfo(NULL /* any IP */, serv, &hints, &res) != 0) { |
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183 | perror("getaddrinfo"); |
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184 | return -1; |
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185 | } |
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186 | ressave = res; |
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187 | do { |
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188 | listenfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); |
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189 | if (listenfd < 0) |
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190 | continue; |
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191 | setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
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192 | if (bind(listenfd, res->ai_addr, res->ai_addrlen) == 0) |
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193 | break; /* success */ |
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194 | close(listenfd); |
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195 | } while ( (res = res->ai_next) ); |
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196 | |
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197 | if (!res) |
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198 | return -1; |
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199 | |
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200 | freeaddrinfo(ressave); |
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201 | #else |
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202 | int listenfd; |
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203 | const int on = 1; |
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204 | struct sockaddr_in sockin; |
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205 | |
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206 | if ((listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { |
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207 | perror("socket"); |
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208 | return -1; |
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209 | } |
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210 | |
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211 | if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) != 0) { |
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212 | perror("setsockopt"); |
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213 | close(listenfd); |
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214 | return -1; |
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215 | } |
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216 | |
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217 | memset(&sockin, 0, sizeof(struct sockaddr_in)); |
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218 | sockin.sin_family = AF_INET; |
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219 | sockin.sin_port = htons(portnum); |
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220 | |
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221 | if (bind(listenfd, (struct sockaddr *)&sockin, sizeof(struct sockaddr_in)) != 0) { |
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222 | perror("bind"); |
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223 | close(listenfd); |
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224 | return -1; |
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225 | } |
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226 | #endif |
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227 | |
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228 | if (listen(listenfd, 4) != 0) { |
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229 | perror("listen"); |
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230 | close(listenfd); |
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231 | return -1; |
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232 | } |
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233 | fcntl(listenfd, F_SETFL, O_NONBLOCK); |
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234 | |
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235 | return listenfd; |
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236 | } |
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237 | |
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238 | /** |
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239 | * After establishing a listening socket, this is called to accept a connection. It |
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240 | * clones the conn used by the listener, and passes both of these to a signal handler. |
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241 | * The signal handler should close the listener conn and keep track of the new conn, |
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242 | * since this is what is used for file transfers and what not. |
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243 | * |
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244 | * @param sess The session. |
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245 | * @param cur The conn the incoming connection is on. |
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246 | * @return Return 0 if no errors, otherwise return the error number. |
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247 | */ |
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248 | faim_export int aim_handlerendconnect(aim_session_t *sess, aim_conn_t *cur) |
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249 | { |
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250 | int acceptfd = 0; |
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251 | struct sockaddr addr; |
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252 | socklen_t addrlen = sizeof(addr); |
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253 | int ret = 0; |
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254 | aim_conn_t *newconn; |
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255 | char ip[20]; |
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256 | int port; |
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257 | |
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258 | if ((acceptfd = accept(cur->fd, &addr, &addrlen)) == -1) |
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259 | return 0; /* not an error */ |
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260 | |
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261 | if ((addr.sa_family != AF_INET) && (addr.sa_family != AF_INET6)) { /* just in case IPv6 really is happening */ |
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262 | close(acceptfd); |
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263 | aim_conn_close(cur); |
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264 | return -1; |
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265 | } |
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266 | |
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267 | strncpy(ip, inet_ntoa(((struct sockaddr_in *)&addr)->sin_addr), sizeof(ip)); |
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268 | port = ntohs(((struct sockaddr_in *)&addr)->sin_port); |
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269 | |
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270 | if (!(newconn = aim_cloneconn(sess, cur))) { |
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271 | close(acceptfd); |
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272 | aim_conn_close(cur); |
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273 | return -ENOMEM; |
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274 | } |
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275 | |
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276 | newconn->type = AIM_CONN_TYPE_RENDEZVOUS; |
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277 | newconn->fd = acceptfd; |
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278 | |
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279 | if (newconn->subtype == AIM_CONN_SUBTYPE_OFT_DIRECTIM) { |
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280 | aim_rxcallback_t userfunc; |
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281 | struct aim_odc_intdata *priv; |
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282 | |
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283 | priv = (struct aim_odc_intdata *)(newconn->internal = cur->internal); |
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284 | cur->internal = NULL; |
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285 | snprintf(priv->ip, sizeof(priv->ip), "%s:%u", ip, port); |
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286 | |
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287 | if ((userfunc = aim_callhandler(sess, newconn, AIM_CB_FAM_OFT, AIM_CB_OFT_DIRECTIM_ESTABLISHED))) |
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288 | ret = userfunc(sess, NULL, newconn, cur); |
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289 | |
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290 | } else if (newconn->subtype == AIM_CONN_SUBTYPE_OFT_GETFILE) { |
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291 | } else if (newconn->subtype == AIM_CONN_SUBTYPE_OFT_SENDFILE) { |
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292 | aim_rxcallback_t userfunc; |
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293 | |
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294 | if ((userfunc = aim_callhandler(sess, newconn, AIM_CB_FAM_OFT, AIM_CB_OFT_ESTABLISHED))) |
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295 | ret = userfunc(sess, NULL, newconn, cur); |
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296 | |
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297 | } else { |
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298 | faimdprintf(sess, 1,"Got a connection on a listener that's not rendezvous. Closing connection.\n"); |
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299 | aim_conn_close(newconn); |
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300 | ret = -1; |
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301 | } |
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302 | |
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303 | return ret; |
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304 | } |
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305 | |
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306 | /** |
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307 | * Send client-to-client typing notification over an established direct connection. |
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308 | * |
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309 | * @param sess The session. |
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310 | * @param conn The already-connected ODC connection. |
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311 | * @param typing If 0x0002, sends a "typing" message, 0x0001 sends "typed," and |
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312 | * 0x0000 sends "stopped." |
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313 | * @return Return 0 if no errors, otherwise return the error number. |
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314 | */ |
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315 | faim_export int aim_odc_send_typing(aim_session_t *sess, aim_conn_t *conn, int typing) |
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316 | { |
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317 | struct aim_odc_intdata *intdata = (struct aim_odc_intdata *)conn->internal; |
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318 | aim_frame_t *fr; |
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319 | aim_bstream_t *hdrbs; |
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320 | fu8_t *hdr; |
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321 | int hdrlen = 0x44; |
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322 | |
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323 | if (!sess || !conn || (conn->type != AIM_CONN_TYPE_RENDEZVOUS)) |
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324 | return -EINVAL; |
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325 | |
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326 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_OFT, 0x0001, 0))) |
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327 | return -ENOMEM; |
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328 | memcpy(fr->hdr.rend.magic, "ODC2", 4); |
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329 | fr->hdr.rend.hdrlen = hdrlen; |
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330 | |
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331 | if (!(hdr = calloc(1, hdrlen))) { |
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332 | aim_frame_destroy(fr); |
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333 | return -ENOMEM; |
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334 | } |
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335 | |
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336 | hdrbs = &(fr->data); |
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337 | aim_bstream_init(hdrbs, hdr, hdrlen); |
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338 | |
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339 | aimbs_put16(hdrbs, 0x0006); |
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340 | aimbs_put16(hdrbs, 0x0000); |
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341 | aimbs_putraw(hdrbs, intdata->cookie, 8); |
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342 | aimbs_put16(hdrbs, 0x0000); |
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343 | aimbs_put16(hdrbs, 0x0000); |
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344 | aimbs_put16(hdrbs, 0x0000); |
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345 | aimbs_put16(hdrbs, 0x0000); |
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346 | aimbs_put32(hdrbs, 0x00000000); |
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347 | aimbs_put16(hdrbs, 0x0000); |
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348 | aimbs_put16(hdrbs, 0x0000); |
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349 | aimbs_put16(hdrbs, 0x0000); |
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350 | |
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351 | if (typing == 0x0002) |
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352 | aimbs_put16(hdrbs, 0x0002 | 0x0008); |
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353 | else if (typing == 0x0001) |
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354 | aimbs_put16(hdrbs, 0x0002 | 0x0004); |
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355 | else |
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356 | aimbs_put16(hdrbs, 0x0002); |
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357 | |
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358 | aimbs_put16(hdrbs, 0x0000); |
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359 | aimbs_put16(hdrbs, 0x0000); |
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360 | aimbs_putraw(hdrbs, sess->sn, strlen(sess->sn)); |
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361 | |
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362 | aim_bstream_setpos(hdrbs, 52); /* bleeehh */ |
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363 | |
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364 | aimbs_put8(hdrbs, 0x00); |
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365 | aimbs_put16(hdrbs, 0x0000); |
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366 | aimbs_put16(hdrbs, 0x0000); |
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367 | aimbs_put16(hdrbs, 0x0000); |
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368 | aimbs_put16(hdrbs, 0x0000); |
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369 | aimbs_put16(hdrbs, 0x0000); |
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370 | aimbs_put16(hdrbs, 0x0000); |
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371 | aimbs_put16(hdrbs, 0x0000); |
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372 | aimbs_put8(hdrbs, 0x00); |
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373 | |
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374 | /* end of hdr */ |
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375 | |
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376 | aim_tx_enqueue(sess, fr); |
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377 | |
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378 | return 0; |
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379 | } |
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380 | |
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381 | /** |
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382 | * Send client-to-client IM over an established direct connection. |
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383 | * Call this just like you would aim_send_im, to send a directim. |
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384 | * |
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385 | * @param sess The session. |
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386 | * @param conn The already-connected ODC connection. |
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387 | * @param msg Null-terminated string to send. |
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388 | * @param len The length of the message to send, including binary data. |
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389 | * @param encoding 0 for ascii, 2 for Unicode, 3 for ISO 8859-1. |
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390 | * @param isawaymsg 0 if this is not an auto-response, 1 if it is. |
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391 | * @return Return 0 if no errors, otherwise return the error number. |
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392 | */ |
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393 | faim_export int aim_odc_send_im(aim_session_t *sess, aim_conn_t *conn, const char *msg, int len, int encoding, int isawaymsg) |
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394 | { |
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395 | aim_frame_t *fr; |
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396 | aim_bstream_t *hdrbs; |
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397 | struct aim_odc_intdata *intdata = (struct aim_odc_intdata *)conn->internal; |
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398 | int hdrlen = 0x44; |
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399 | fu8_t *hdr; |
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400 | |
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401 | if (!sess || !conn || (conn->type != AIM_CONN_TYPE_RENDEZVOUS) || !msg) |
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402 | return -EINVAL; |
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403 | |
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404 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_OFT, 0x01, 0))) |
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405 | return -ENOMEM; |
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406 | |
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407 | memcpy(fr->hdr.rend.magic, "ODC2", 4); |
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408 | fr->hdr.rend.hdrlen = hdrlen; |
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409 | |
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410 | if (!(hdr = calloc(1, hdrlen + len))) { |
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411 | aim_frame_destroy(fr); |
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412 | return -ENOMEM; |
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413 | } |
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414 | |
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415 | hdrbs = &(fr->data); |
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416 | aim_bstream_init(hdrbs, hdr, hdrlen + len); |
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417 | |
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418 | aimbs_put16(hdrbs, 0x0006); |
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419 | aimbs_put16(hdrbs, 0x0000); |
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420 | aimbs_putraw(hdrbs, intdata->cookie, 8); |
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421 | aimbs_put16(hdrbs, 0x0000); |
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422 | aimbs_put16(hdrbs, 0x0000); |
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423 | aimbs_put16(hdrbs, 0x0000); |
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424 | aimbs_put16(hdrbs, 0x0000); |
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425 | aimbs_put32(hdrbs, len); |
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426 | aimbs_put16(hdrbs, encoding); |
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427 | aimbs_put16(hdrbs, 0x0000); |
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428 | aimbs_put16(hdrbs, 0x0000); |
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429 | |
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430 | /* flags - used for typing notification and to mark if this is an away message */ |
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431 | aimbs_put16(hdrbs, 0x0000 | isawaymsg); |
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432 | |
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433 | aimbs_put16(hdrbs, 0x0000); |
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434 | aimbs_put16(hdrbs, 0x0000); |
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435 | aimbs_putraw(hdrbs, sess->sn, strlen(sess->sn)); |
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436 | |
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437 | aim_bstream_setpos(hdrbs, 52); /* bleeehh */ |
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438 | |
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439 | aimbs_put8(hdrbs, 0x00); |
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440 | aimbs_put16(hdrbs, 0x0000); |
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441 | aimbs_put16(hdrbs, 0x0000); |
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442 | aimbs_put16(hdrbs, 0x0000); |
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443 | aimbs_put16(hdrbs, 0x0000); |
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444 | aimbs_put16(hdrbs, 0x0000); |
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445 | aimbs_put16(hdrbs, 0x0000); |
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446 | aimbs_put16(hdrbs, 0x0000); |
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447 | aimbs_put8(hdrbs, 0x00); |
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448 | |
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449 | /* end of hdr2 */ |
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450 | |
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451 | #if 0 /* XXX - this is how you send buddy icon info... */ |
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452 | aimbs_put16(hdrbs, 0x0008); |
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453 | aimbs_put16(hdrbs, 0x000c); |
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454 | aimbs_put16(hdrbs, 0x0000); |
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455 | aimbs_put16(hdrbs, 0x1466); |
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456 | aimbs_put16(hdrbs, 0x0001); |
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457 | aimbs_put16(hdrbs, 0x2e0f); |
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458 | aimbs_put16(hdrbs, 0x393e); |
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459 | aimbs_put16(hdrbs, 0xcac8); |
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460 | #endif |
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461 | aimbs_putraw(hdrbs, msg, len); |
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462 | |
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463 | aim_tx_enqueue(sess, fr); |
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464 | |
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465 | return 0; |
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466 | } |
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467 | |
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468 | /** |
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469 | * Get the screen name of the peer of a direct connection. |
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470 | * |
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471 | * @param conn The ODC connection. |
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472 | * @return The screen name of the dude, or NULL if there was an anomaly. |
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473 | */ |
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474 | faim_export const char *aim_odc_getsn(aim_conn_t *conn) |
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475 | { |
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476 | struct aim_odc_intdata *intdata; |
---|
477 | |
---|
478 | if (!conn || !conn->internal) |
---|
479 | return NULL; |
---|
480 | |
---|
481 | if ((conn->type != AIM_CONN_TYPE_RENDEZVOUS) || |
---|
482 | (conn->subtype != AIM_CONN_SUBTYPE_OFT_DIRECTIM)) |
---|
483 | return NULL; |
---|
484 | |
---|
485 | intdata = (struct aim_odc_intdata *)conn->internal; |
---|
486 | |
---|
487 | return intdata->sn; |
---|
488 | } |
---|
489 | |
---|
490 | /** |
---|
491 | * Find the conn of a direct connection with the given buddy. |
---|
492 | * |
---|
493 | * @param sess The session. |
---|
494 | * @param sn The screen name of the buddy whose direct connection you want to find. |
---|
495 | * @return The conn for the direct connection with the given buddy, or NULL if no |
---|
496 | * connection was found. |
---|
497 | */ |
---|
498 | faim_export aim_conn_t *aim_odc_getconn(aim_session_t *sess, const char *sn) |
---|
499 | { |
---|
500 | aim_conn_t *cur; |
---|
501 | struct aim_odc_intdata *intdata; |
---|
502 | |
---|
503 | if (!sess || !sn || !strlen(sn)) |
---|
504 | return NULL; |
---|
505 | |
---|
506 | for (cur = sess->connlist; cur; cur = cur->next) { |
---|
507 | if ((cur->type == AIM_CONN_TYPE_RENDEZVOUS) && (cur->subtype == AIM_CONN_SUBTYPE_OFT_DIRECTIM)) { |
---|
508 | intdata = cur->internal; |
---|
509 | if (!aim_sncmp(intdata->sn, sn)) |
---|
510 | return cur; |
---|
511 | } |
---|
512 | } |
---|
513 | |
---|
514 | return NULL; |
---|
515 | } |
---|
516 | |
---|
517 | /** |
---|
518 | * For those times when we want to open up the direct connection channel ourselves. |
---|
519 | * |
---|
520 | * You'll want to set up some kind of watcher on this socket. |
---|
521 | * When the state changes, call aim_handlerendconnection with |
---|
522 | * the connection returned by this. aim_handlerendconnection |
---|
523 | * will accept the pending connection and stop listening. |
---|
524 | * |
---|
525 | * @param sess The session |
---|
526 | * @param sn The screen name to connect to. |
---|
527 | * @return The new connection. |
---|
528 | */ |
---|
529 | faim_export aim_conn_t *aim_odc_initiate(aim_session_t *sess, const char *sn) |
---|
530 | { |
---|
531 | aim_conn_t *newconn; |
---|
532 | aim_msgcookie_t *cookie; |
---|
533 | struct aim_odc_intdata *priv; |
---|
534 | int listenfd; |
---|
535 | fu16_t port = 4443; |
---|
536 | fu8_t localip[4]; |
---|
537 | fu8_t ck[8]; |
---|
538 | |
---|
539 | if (aim_util_getlocalip(localip) == -1) |
---|
540 | return NULL; |
---|
541 | |
---|
542 | if ((listenfd = listenestablish(port)) == -1) |
---|
543 | return NULL; |
---|
544 | |
---|
545 | aim_im_sendch2_odcrequest(sess, ck, sn, localip, port); |
---|
546 | |
---|
547 | cookie = (aim_msgcookie_t *)calloc(1, sizeof(aim_msgcookie_t)); |
---|
548 | memcpy(cookie->cookie, ck, 8); |
---|
549 | cookie->type = AIM_COOKIETYPE_OFTIM; |
---|
550 | |
---|
551 | /* this one is for the cookie */ |
---|
552 | priv = (struct aim_odc_intdata *)calloc(1, sizeof(struct aim_odc_intdata)); |
---|
553 | |
---|
554 | memcpy(priv->cookie, ck, 8); |
---|
555 | strncpy(priv->sn, sn, sizeof(priv->sn)); |
---|
556 | cookie->data = priv; |
---|
557 | aim_cachecookie(sess, cookie); |
---|
558 | |
---|
559 | /* XXX - switch to aim_cloneconn()? */ |
---|
560 | if (!(newconn = aim_newconn(sess, AIM_CONN_TYPE_LISTENER, NULL))) { |
---|
561 | close(listenfd); |
---|
562 | return NULL; |
---|
563 | } |
---|
564 | |
---|
565 | /* this one is for the conn */ |
---|
566 | priv = (struct aim_odc_intdata *)calloc(1, sizeof(struct aim_odc_intdata)); |
---|
567 | |
---|
568 | memcpy(priv->cookie, ck, 8); |
---|
569 | strncpy(priv->sn, sn, sizeof(priv->sn)); |
---|
570 | |
---|
571 | newconn->fd = listenfd; |
---|
572 | newconn->subtype = AIM_CONN_SUBTYPE_OFT_DIRECTIM; |
---|
573 | newconn->internal = priv; |
---|
574 | newconn->lastactivity = time(NULL); |
---|
575 | |
---|
576 | return newconn; |
---|
577 | } |
---|
578 | |
---|
579 | /** |
---|
580 | * Connect directly to the given buddy for directim. |
---|
581 | * |
---|
582 | * This is a wrapper for aim_newconn. |
---|
583 | * |
---|
584 | * If addr is NULL, the socket is not created, but the connection is |
---|
585 | * allocated and setup to connect. |
---|
586 | * |
---|
587 | * @param sess The Godly session. |
---|
588 | * @param sn The screen name we're connecting to. I hope it's a girl... |
---|
589 | * @param addr Address to connect to. |
---|
590 | * @return The new connection. |
---|
591 | */ |
---|
592 | faim_export aim_conn_t *aim_odc_connect(aim_session_t *sess, const char *sn, const char *addr, const fu8_t *cookie) |
---|
593 | { |
---|
594 | aim_conn_t *newconn; |
---|
595 | struct aim_odc_intdata *intdata; |
---|
596 | |
---|
597 | if (!sess || !sn) |
---|
598 | return NULL; |
---|
599 | |
---|
600 | if (!(intdata = calloc(1, sizeof(struct aim_odc_intdata)))) |
---|
601 | return NULL; |
---|
602 | memcpy(intdata->cookie, cookie, 8); |
---|
603 | strncpy(intdata->sn, sn, sizeof(intdata->sn)); |
---|
604 | if (addr) |
---|
605 | strncpy(intdata->ip, addr, sizeof(intdata->ip)); |
---|
606 | |
---|
607 | /* XXX - verify that non-blocking connects actually work */ |
---|
608 | if (!(newconn = aim_newconn(sess, AIM_CONN_TYPE_RENDEZVOUS, addr))) { |
---|
609 | free(intdata); |
---|
610 | return NULL; |
---|
611 | } |
---|
612 | |
---|
613 | newconn->internal = intdata; |
---|
614 | newconn->subtype = AIM_CONN_SUBTYPE_OFT_DIRECTIM; |
---|
615 | |
---|
616 | return newconn; |
---|
617 | } |
---|
618 | |
---|
619 | /** |
---|
620 | * Sometimes you just don't know with these kinds of people. |
---|
621 | * |
---|
622 | * @param sess The session. |
---|
623 | * @param conn The ODC connection of the incoming data. |
---|
624 | * @param frr The frame allocated for the incoming data. |
---|
625 | * @param bs It stands for "bologna sandwich." |
---|
626 | * @return Return 0 if no errors, otherwise return the error number. |
---|
627 | */ |
---|
628 | static int handlehdr_odc(aim_session_t *sess, aim_conn_t *conn, aim_frame_t *frr, aim_bstream_t *bs) |
---|
629 | { |
---|
630 | aim_frame_t fr; |
---|
631 | int ret = 0; |
---|
632 | aim_rxcallback_t userfunc; |
---|
633 | fu32_t payloadlength; |
---|
634 | fu16_t flags, encoding; |
---|
635 | char *snptr = NULL; |
---|
636 | |
---|
637 | fr.conn = conn; |
---|
638 | |
---|
639 | /* AAA - ugly */ |
---|
640 | aim_bstream_setpos(bs, 20); |
---|
641 | payloadlength = aimbs_get32(bs); |
---|
642 | |
---|
643 | aim_bstream_setpos(bs, 24); |
---|
644 | encoding = aimbs_get16(bs); |
---|
645 | |
---|
646 | aim_bstream_setpos(bs, 30); |
---|
647 | flags = aimbs_get16(bs); |
---|
648 | |
---|
649 | aim_bstream_setpos(bs, 36); |
---|
650 | /* XXX - create an aimbs_getnullstr function? */ |
---|
651 | snptr = aimbs_getstr(bs, 32); /* Next 32 bytes contain the sn, padded with null chars */ |
---|
652 | |
---|
653 | faimdprintf(sess, 2, "faim: OFT frame: handlehdr_odc: %04x / %04x / %s\n", payloadlength, flags, snptr); |
---|
654 | |
---|
655 | if (flags & 0x0008) { |
---|
656 | if ((userfunc = aim_callhandler(sess, conn, AIM_CB_FAM_OFT, AIM_CB_OFT_DIRECTIMTYPING))) |
---|
657 | ret = userfunc(sess, &fr, snptr, 2); |
---|
658 | } else if (flags & 0x0004) { |
---|
659 | if ((userfunc = aim_callhandler(sess, conn, AIM_CB_FAM_OFT, AIM_CB_OFT_DIRECTIMTYPING))) |
---|
660 | ret = userfunc(sess, &fr, snptr, 1); |
---|
661 | } else { |
---|
662 | if ((userfunc = aim_callhandler(sess, conn, AIM_CB_FAM_OFT, AIM_CB_OFT_DIRECTIMTYPING))) |
---|
663 | ret = userfunc(sess, &fr, snptr, 0); |
---|
664 | } |
---|
665 | |
---|
666 | if (payloadlength) { |
---|
667 | char *msg; |
---|
668 | int recvd = 0; |
---|
669 | int i, isawaymsg; |
---|
670 | |
---|
671 | isawaymsg = flags & 0x0001; |
---|
672 | |
---|
673 | if (!(msg = calloc(1, payloadlength+1))) { |
---|
674 | free(snptr); |
---|
675 | return -ENOMEM; |
---|
676 | } |
---|
677 | |
---|
678 | while (payloadlength - recvd) { |
---|
679 | if (payloadlength - recvd >= 1024) |
---|
680 | i = aim_recv(conn->fd, &msg[recvd], 1024); |
---|
681 | else |
---|
682 | i = aim_recv(conn->fd, &msg[recvd], payloadlength - recvd); |
---|
683 | if (i <= 0) { |
---|
684 | free(msg); |
---|
685 | free(snptr); |
---|
686 | return -1; |
---|
687 | } |
---|
688 | recvd = recvd + i; |
---|
689 | if ((userfunc = aim_callhandler(sess, conn, AIM_CB_FAM_SPECIAL, AIM_CB_SPECIAL_IMAGETRANSFER))) |
---|
690 | ret = userfunc(sess, &fr, snptr, (double)recvd / payloadlength); |
---|
691 | } |
---|
692 | |
---|
693 | if ((userfunc = aim_callhandler(sess, conn, AIM_CB_FAM_OFT, AIM_CB_OFT_DIRECTIMINCOMING))) |
---|
694 | ret = userfunc(sess, &fr, snptr, msg, payloadlength, encoding, isawaymsg); |
---|
695 | |
---|
696 | free(msg); |
---|
697 | } |
---|
698 | |
---|
699 | free(snptr); |
---|
700 | |
---|
701 | return ret; |
---|
702 | } |
---|
703 | |
---|
704 | faim_export struct aim_oft_info *aim_oft_createinfo(aim_session_t *sess, const fu8_t *cookie, const char *sn, const char *ip, fu16_t port, fu32_t size, fu32_t modtime, char *filename) |
---|
705 | { |
---|
706 | struct aim_oft_info *new; |
---|
707 | |
---|
708 | if (!sess) |
---|
709 | return NULL; |
---|
710 | |
---|
711 | if (!(new = (struct aim_oft_info *)calloc(1, sizeof(struct aim_oft_info)))) |
---|
712 | return NULL; |
---|
713 | |
---|
714 | new->sess = sess; |
---|
715 | if (cookie) |
---|
716 | memcpy(new->cookie, cookie, 8); |
---|
717 | if (ip) |
---|
718 | new->clientip = strdup(ip); |
---|
719 | if (sn) |
---|
720 | new->sn = strdup(sn); |
---|
721 | new->port = port; |
---|
722 | new->fh.totfiles = 1; |
---|
723 | new->fh.filesleft = 1; |
---|
724 | new->fh.totparts = 1; |
---|
725 | new->fh.partsleft = 1; |
---|
726 | new->fh.totsize = size; |
---|
727 | new->fh.size = size; |
---|
728 | new->fh.modtime = modtime; |
---|
729 | new->fh.checksum = 0xffff0000; |
---|
730 | new->fh.rfrcsum = 0xffff0000; |
---|
731 | new->fh.rfcsum = 0xffff0000; |
---|
732 | new->fh.recvcsum = 0xffff0000; |
---|
733 | strncpy(new->fh.idstring, "OFT_Windows ICBMFT V1.1 32", 31); |
---|
734 | if (filename) |
---|
735 | strncpy(new->fh.name, filename, 63); |
---|
736 | |
---|
737 | new->next = sess->oft_info; |
---|
738 | sess->oft_info = new; |
---|
739 | |
---|
740 | return new; |
---|
741 | } |
---|
742 | |
---|
743 | /** |
---|
744 | * Remove the given oft_info struct from the oft_info linked list, and |
---|
745 | * then free its memory. |
---|
746 | * |
---|
747 | * @param sess The session. |
---|
748 | * @param oft_info The aim_oft_info struct that we're destroying. |
---|
749 | * @return Return 0 if no errors, otherwise return the error number. |
---|
750 | */ |
---|
751 | faim_export int aim_oft_destroyinfo(struct aim_oft_info *oft_info) |
---|
752 | { |
---|
753 | aim_session_t *sess; |
---|
754 | |
---|
755 | if (!oft_info || !(sess = oft_info->sess)) |
---|
756 | return -EINVAL; |
---|
757 | |
---|
758 | if (sess->oft_info && (sess->oft_info == oft_info)) { |
---|
759 | sess->oft_info = sess->oft_info->next; |
---|
760 | } else { |
---|
761 | struct aim_oft_info *cur; |
---|
762 | for (cur=sess->oft_info; (cur->next && (cur->next!=oft_info)); cur=cur->next); |
---|
763 | if (cur->next) |
---|
764 | cur->next = cur->next->next; |
---|
765 | } |
---|
766 | |
---|
767 | free(oft_info->sn); |
---|
768 | free(oft_info->proxyip); |
---|
769 | free(oft_info->clientip); |
---|
770 | free(oft_info->verifiedip); |
---|
771 | free(oft_info); |
---|
772 | |
---|
773 | return 0; |
---|
774 | } |
---|
775 | |
---|
776 | /** |
---|
777 | * Creates a listener socket so the other dude can connect to us. |
---|
778 | * |
---|
779 | * You'll want to set up some kind of watcher on this socket. |
---|
780 | * When the state changes, call aim_handlerendconnection with |
---|
781 | * the connection returned by this. aim_handlerendconnection |
---|
782 | * will accept the pending connection and stop listening. |
---|
783 | * |
---|
784 | * @param sess The session. |
---|
785 | * @param oft_info File transfer information associated with this |
---|
786 | * connection. |
---|
787 | * @return Return 0 if no errors, otherwise return the error number. |
---|
788 | */ |
---|
789 | faim_export int aim_sendfile_listen(aim_session_t *sess, struct aim_oft_info *oft_info) |
---|
790 | { |
---|
791 | int listenfd; |
---|
792 | |
---|
793 | if (!oft_info) |
---|
794 | return -EINVAL; |
---|
795 | |
---|
796 | if ((listenfd = listenestablish(oft_info->port)) == -1) |
---|
797 | return 1; |
---|
798 | |
---|
799 | if (!(oft_info->conn = aim_newconn(sess, AIM_CONN_TYPE_LISTENER, NULL))) { |
---|
800 | close(listenfd); |
---|
801 | return -ENOMEM; |
---|
802 | } |
---|
803 | |
---|
804 | oft_info->conn->fd = listenfd; |
---|
805 | oft_info->conn->subtype = AIM_CONN_SUBTYPE_OFT_SENDFILE; |
---|
806 | oft_info->conn->lastactivity = time(NULL); |
---|
807 | |
---|
808 | return 0; |
---|
809 | } |
---|
810 | |
---|
811 | /** |
---|
812 | * Extract an &aim_fileheader_t from the given buffer. |
---|
813 | * |
---|
814 | * @param bs The should be from an incoming rendezvous packet. |
---|
815 | * @return A pointer to new struct on success, or NULL on error. |
---|
816 | */ |
---|
817 | static struct aim_fileheader_t *aim_oft_getheader(aim_bstream_t *bs) |
---|
818 | { |
---|
819 | struct aim_fileheader_t *fh; |
---|
820 | |
---|
821 | if (!(fh = calloc(1, sizeof(struct aim_fileheader_t)))) |
---|
822 | return NULL; |
---|
823 | |
---|
824 | /* The bstream should be positioned after the hdrtype. */ |
---|
825 | aimbs_getrawbuf(bs, fh->bcookie, 8); |
---|
826 | fh->encrypt = aimbs_get16(bs); |
---|
827 | fh->compress = aimbs_get16(bs); |
---|
828 | fh->totfiles = aimbs_get16(bs); |
---|
829 | fh->filesleft = aimbs_get16(bs); |
---|
830 | fh->totparts = aimbs_get16(bs); |
---|
831 | fh->partsleft = aimbs_get16(bs); |
---|
832 | fh->totsize = aimbs_get32(bs); |
---|
833 | fh->size = aimbs_get32(bs); |
---|
834 | fh->modtime = aimbs_get32(bs); |
---|
835 | fh->checksum = aimbs_get32(bs); |
---|
836 | fh->rfrcsum = aimbs_get32(bs); |
---|
837 | fh->rfsize = aimbs_get32(bs); |
---|
838 | fh->cretime = aimbs_get32(bs); |
---|
839 | fh->rfcsum = aimbs_get32(bs); |
---|
840 | fh->nrecvd = aimbs_get32(bs); |
---|
841 | fh->recvcsum = aimbs_get32(bs); |
---|
842 | aimbs_getrawbuf(bs, fh->idstring, 32); |
---|
843 | fh->flags = aimbs_get8(bs); |
---|
844 | fh->lnameoffset = aimbs_get8(bs); |
---|
845 | fh->lsizeoffset = aimbs_get8(bs); |
---|
846 | aimbs_getrawbuf(bs, fh->dummy, 69); |
---|
847 | aimbs_getrawbuf(bs, fh->macfileinfo, 16); |
---|
848 | fh->nencode = aimbs_get16(bs); |
---|
849 | fh->nlanguage = aimbs_get16(bs); |
---|
850 | aimbs_getrawbuf(bs, fh->name, 64); /* XXX - filenames longer than 64B */ |
---|
851 | |
---|
852 | return fh; |
---|
853 | } |
---|
854 | |
---|
855 | /** |
---|
856 | * Fills a buffer with network-order fh data |
---|
857 | * |
---|
858 | * @param bs A bstream to fill -- automatically initialized |
---|
859 | * @param fh A struct aim_fileheader_t to get data from. |
---|
860 | * @return Return non-zero on error. |
---|
861 | */ |
---|
862 | static int aim_oft_buildheader(aim_bstream_t *bs, struct aim_fileheader_t *fh) |
---|
863 | { |
---|
864 | fu8_t *hdr; |
---|
865 | |
---|
866 | if (!bs || !fh) |
---|
867 | return -EINVAL; |
---|
868 | |
---|
869 | if (!(hdr = (unsigned char *)calloc(1, 0x100 - 8))) |
---|
870 | return -ENOMEM; |
---|
871 | |
---|
872 | aim_bstream_init(bs, hdr, 0x100 - 8); |
---|
873 | aimbs_putraw(bs, fh->bcookie, 8); |
---|
874 | aimbs_put16(bs, fh->encrypt); |
---|
875 | aimbs_put16(bs, fh->compress); |
---|
876 | aimbs_put16(bs, fh->totfiles); |
---|
877 | aimbs_put16(bs, fh->filesleft); |
---|
878 | aimbs_put16(bs, fh->totparts); |
---|
879 | aimbs_put16(bs, fh->partsleft); |
---|
880 | aimbs_put32(bs, fh->totsize); |
---|
881 | aimbs_put32(bs, fh->size); |
---|
882 | aimbs_put32(bs, fh->modtime); |
---|
883 | aimbs_put32(bs, fh->checksum); |
---|
884 | aimbs_put32(bs, fh->rfrcsum); |
---|
885 | aimbs_put32(bs, fh->rfsize); |
---|
886 | aimbs_put32(bs, fh->cretime); |
---|
887 | aimbs_put32(bs, fh->rfcsum); |
---|
888 | aimbs_put32(bs, fh->nrecvd); |
---|
889 | aimbs_put32(bs, fh->recvcsum); |
---|
890 | aimbs_putraw(bs, fh->idstring, 32); |
---|
891 | aimbs_put8(bs, fh->flags); |
---|
892 | aimbs_put8(bs, fh->lnameoffset); |
---|
893 | aimbs_put8(bs, fh->lsizeoffset); |
---|
894 | aimbs_putraw(bs, fh->dummy, 69); |
---|
895 | aimbs_putraw(bs, fh->macfileinfo, 16); |
---|
896 | aimbs_put16(bs, fh->nencode); |
---|
897 | aimbs_put16(bs, fh->nlanguage); |
---|
898 | aimbs_putraw(bs, fh->name, 64); /* XXX - filenames longer than 64B */ |
---|
899 | |
---|
900 | return 0; |
---|
901 | } |
---|
902 | |
---|
903 | /** |
---|
904 | * Create an OFT packet based on the given information, and send it on its merry way. |
---|
905 | * |
---|
906 | * @param sess The session. |
---|
907 | * @param type The subtype of the OFT packet we're sending. |
---|
908 | * @param oft_info The aim_oft_info struct with the connection and OFT |
---|
909 | * info we're sending. |
---|
910 | * @return Return 0 if no errors, otherwise return the error number. |
---|
911 | */ |
---|
912 | faim_export int aim_oft_sendheader(aim_session_t *sess, fu16_t type, struct aim_oft_info *oft_info) |
---|
913 | { |
---|
914 | aim_frame_t *fr; |
---|
915 | |
---|
916 | if (!sess || !oft_info || !oft_info->conn || (oft_info->conn->type != AIM_CONN_TYPE_RENDEZVOUS)) |
---|
917 | return -EINVAL; |
---|
918 | |
---|
919 | #if 0 |
---|
920 | /* |
---|
921 | * If you are receiving a file, the cookie should be null, if you are sending a |
---|
922 | * file, the cookie should be the same as the one used in the ICBM negotiation |
---|
923 | * SNACs. |
---|
924 | */ |
---|
925 | fh->lnameoffset = 0x1a; |
---|
926 | fh->lsizeoffset = 0x10; |
---|
927 | |
---|
928 | /* apparently 0 is ASCII, 2 is UCS-2 */ |
---|
929 | /* it is likely that 3 is ISO 8859-1 */ |
---|
930 | /* I think "nlanguage" might be the same thing as "subenc" in im.c */ |
---|
931 | fh->nencode = 0x0000; |
---|
932 | fh->nlanguage = 0x0000; |
---|
933 | #endif |
---|
934 | |
---|
935 | aim_oft_dirconvert_tostupid(oft_info->fh.name); |
---|
936 | |
---|
937 | if (!(fr = aim_tx_new(sess, oft_info->conn, AIM_FRAMETYPE_OFT, type, 0))) |
---|
938 | return -ENOMEM; |
---|
939 | |
---|
940 | if (aim_oft_buildheader(&fr->data, &oft_info->fh) == -1) { |
---|
941 | aim_frame_destroy(fr); |
---|
942 | return -ENOMEM; |
---|
943 | } |
---|
944 | |
---|
945 | memcpy(fr->hdr.rend.magic, "OFT2", 4); |
---|
946 | fr->hdr.rend.hdrlen = aim_bstream_curpos(&fr->data); |
---|
947 | |
---|
948 | aim_tx_enqueue(sess, fr); |
---|
949 | |
---|
950 | return 0; |
---|
951 | } |
---|
952 | |
---|
953 | /** |
---|
954 | * Handle incoming data on a rendezvous connection. This is analogous to the |
---|
955 | * consumesnac function in rxhandlers.c, and I really think this should probably |
---|
956 | * be in rxhandlers.c as well, but I haven't finished cleaning everything up yet. |
---|
957 | * |
---|
958 | * @param sess The session. |
---|
959 | * @param fr The frame allocated for the incoming data. |
---|
960 | * @return Return 0 if the packet was handled correctly, otherwise return the |
---|
961 | * error number. |
---|
962 | */ |
---|
963 | faim_internal int aim_rxdispatch_rendezvous(aim_session_t *sess, aim_frame_t *fr) |
---|
964 | { |
---|
965 | aim_conn_t *conn = fr->conn; |
---|
966 | int ret = 1; |
---|
967 | |
---|
968 | if (conn->subtype == AIM_CONN_SUBTYPE_OFT_DIRECTIM) { |
---|
969 | if (fr->hdr.rend.type == 0x0001) |
---|
970 | ret = handlehdr_odc(sess, conn, fr, &fr->data); |
---|
971 | else |
---|
972 | faimdprintf(sess, 0, "faim: ODC directim frame unknown, type is %04x\n", fr->hdr.rend.type); |
---|
973 | |
---|
974 | } else { |
---|
975 | aim_rxcallback_t userfunc; |
---|
976 | struct aim_fileheader_t *header = aim_oft_getheader(&fr->data); |
---|
977 | aim_oft_dirconvert_fromstupid(header->name); /* XXX - This should be client-side */ |
---|
978 | |
---|
979 | if ((userfunc = aim_callhandler(sess, conn, AIM_CB_FAM_OFT, fr->hdr.rend.type))) |
---|
980 | ret = userfunc(sess, fr, conn, header->bcookie, header); |
---|
981 | |
---|
982 | free(header); |
---|
983 | } |
---|
984 | |
---|
985 | if (ret == -1) |
---|
986 | aim_conn_close(conn); |
---|
987 | |
---|
988 | return ret; |
---|
989 | } |
---|