├── LICENSE ├── Makefile ├── README └── src ├── client.c ├── client.h ├── main.c ├── server.c └── server.h /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | CC = clang 2 | CFLAGS = -Wall -g -O2 3 | LDFLAGS = -pthread 4 | 5 | SOURCES = $(wildcard src/*.c) 6 | OBJECTS = $(patsubst %.c,%.o,$(SOURCES)) 7 | 8 | TARGET = bin/transfer 9 | 10 | all: $(TARGET) 11 | 12 | $(TARGET): build $(OBJECTS) 13 | $(CC) $(CFLAGS) $(SOURCES) -o $(TARGET) $(LDFLAGS) 14 | 15 | clean: 16 | rm -rf bin 17 | rm src/*.o 18 | 19 | build: 20 | @mkdir -p bin 21 | -------------------------------------------------------------------------------- /README: -------------------------------------------------------------------------------- 1 | Simple file transfer program using C sockets 2 | WIP 3 | 4 | Usage: 5 | transfer -s "path/to/file" 6 | transfer -c "HOST IP" 7 | 8 | DPO Sun 22 Apr 2012 04:59:05 BST -------------------------------------------------------------------------------- /src/client.c: -------------------------------------------------------------------------------- 1 | /* 2 | client.c 3 | 4 | Copyright (C) 2012 Daniel O'Hanlon 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU General Public License as published by 8 | the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU General Public License for more details. 15 | 16 | You should have received a copy of the GNU General Public License 17 | along with this program. If not, see . 18 | 19 | */ 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | 31 | #include "client.h" 32 | 33 | const int port = 1234; 34 | const int kb_size = 1024; 35 | extern int errno; // Used for general error codes 36 | 37 | int client(char *host_ip) 38 | { 39 | struct addrinfo *servinfo = 0; 40 | int sockfd = 0; 41 | 42 | int connect_status = 0; 43 | 44 | servinfo = filladdrinfoc(host_ip, servinfo); 45 | /* 46 | Open socket (domain, type, protocol) 47 | */ 48 | if((sockfd = socket(servinfo->ai_family, servinfo->ai_socktype, servinfo->ai_protocol))==-1){ 49 | fprintf(stderr, "Socket error: %i\n", errno); 50 | exit(5); 51 | } 52 | 53 | if((connect_status = connect(sockfd, servinfo->ai_addr, servinfo->ai_addrlen))==0){ 54 | printf("Connected on port: %i \n",port); 55 | runclient(sockfd); 56 | } 57 | else{ 58 | fprintf(stderr, "%i, %i\n", connect_status, errno); 59 | } 60 | 61 | freeaddrinfo(servinfo); 62 | 63 | return 0; 64 | } 65 | 66 | void *filladdrinfoc(char *host_ip, struct addrinfo *servinfo) 67 | { 68 | int status = 0; 69 | struct addrinfo hints; 70 | char port_a[8] = {0}; 71 | 72 | snprintf(port_a, 8, "%d",port); 73 | /* 74 | Make sure hints is empty before we begin 75 | */ 76 | memset(&hints, 0, sizeof hints); 77 | /* 78 | Fill hints with some initial 'hint' info 79 | */ 80 | hints.ai_family = AF_INET; 81 | hints.ai_socktype = SOCK_STREAM; 82 | /* 83 | Make a call to getaddrinfo with partially filled struct hints, ip, port 84 | and struct to fill with addrinfo. 85 | */ 86 | if((status = getaddrinfo(host_ip, port_a, &hints, &servinfo))){ 87 | fprintf(stderr, "Addrinfo error: %s\n", gai_strerror(status)); 88 | } 89 | return servinfo; 90 | } 91 | 92 | long recvf(int sockfd, long filesize, char *rec_buffer, char *file_buffer) 93 | { 94 | long dreclentot = 0; 95 | int dreclen = 0; 96 | long remaining_bytes = 0; 97 | int packet = 0; 98 | int i = 0; 99 | 100 | while(dreclentot!=filesize){ 101 | // Write to rec buffer to account for TCP, then write all to file_buffer 102 | 103 | if((dreclen = recv(sockfd, rec_buffer, kb_size, 0))==-1){ 104 | fprintf(stderr, "Receive error: %i\n", errno); 105 | } 106 | else if (!dreclen){ 107 | fprintf(stderr, "Host closed the connection.\n"); 108 | exit(5); 109 | } 110 | 111 | dreclentot += dreclen; 112 | packet++; 113 | remaining_bytes = (filesize - dreclentot); 114 | printf("%g%%\n", ((float)dreclentot/(float)filesize) * 100); 115 | 116 | for (i = 0; i < dreclen; ++i){ 117 | file_buffer[(dreclentot-dreclen)+i] = rec_buffer[i]; // copy recieved this iteration to final file buffer 118 | } 119 | } 120 | printf("Received %i packets.\n", packet); 121 | 122 | printf("Received %li bytes, %g%%\n",dreclentot, ((float)dreclentot/(float)filesize)*100); 123 | 124 | return dreclentot; 125 | } 126 | 127 | int runclient(int sockfd) 128 | { 129 | long filesize = 0; 130 | char *filename; 131 | char reqmsg[100]; 132 | char response[2]; 133 | long dreclentot = 0; 134 | 135 | char *rec_buffer; 136 | char *file_buffer; 137 | 138 | FILE *file; 139 | 140 | recv(sockfd, reqmsg, sizeof(reqmsg), 0); 141 | 142 | filename = strtok(reqmsg, ":"); // Split on ":" 143 | filesize = atoi(strtok(NULL, ":")); 144 | 145 | printf("Accept file transfer request: '%s', (%li)? (Y/N)\n", filename, filesize); 146 | 147 | response[0] = (char)toupper(getchar()); 148 | 149 | if(send(sockfd, &response, sizeof response, 0)==-1){ 150 | fprintf(stderr, "Send error: %i\n", errno); 151 | } 152 | 153 | if (strncmp(&response[0], "Y", 1)==0){ 154 | if((file = fopen(filename, "wb"))==NULL){ 155 | fprintf(stderr, "File Opening Error.\n"); 156 | exit(2); 157 | } 158 | if((rec_buffer = malloc(kb_size))==NULL){ 159 | fprintf(stderr, "Receive buffer malloc failed.\n"); 160 | exit(3); 161 | } 162 | if((file_buffer = malloc(filesize))==NULL){ 163 | fprintf(stderr, "File buffer malloc failed.\n"); 164 | exit(4); 165 | } 166 | 167 | dreclentot = recvf(sockfd, filesize, rec_buffer, file_buffer); 168 | 169 | if (dreclentot!=filesize){ 170 | fprintf(stderr, "Warning: Not all bytes received.\n"); 171 | } 172 | else{ 173 | fwrite (file_buffer , 1 , filesize, file); // This MUST be the same size of the original file 174 | printf("File transfer completed, closing file....\n"); 175 | } 176 | 177 | free(rec_buffer); 178 | free(file_buffer); 179 | 180 | fclose(file); 181 | } 182 | else { 183 | printf("File transfer rejected.\n"); 184 | } 185 | 186 | close(sockfd); 187 | 188 | return 0; 189 | } 190 | -------------------------------------------------------------------------------- /src/client.h: -------------------------------------------------------------------------------- 1 | /* 2 | client.h 3 | 4 | Copyright (C) 2012 Daniel O'Hanlon 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU General Public License as published by 8 | the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU General Public License for more details. 15 | 16 | You should have received a copy of the GNU General Public License 17 | along with this program. If not, see . 18 | 19 | */ 20 | 21 | #ifndef _client_h 22 | #define _client_h 23 | 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | #include 31 | #include 32 | 33 | void *filladdrinfoc(char *, struct addrinfo *); 34 | 35 | long recvf(int, long, char *, char *); 36 | 37 | int runclient(int); 38 | 39 | int client(char *); 40 | 41 | #endif -------------------------------------------------------------------------------- /src/main.c: -------------------------------------------------------------------------------- 1 | /* 2 | main.c 3 | 4 | Copyright (C) 2012 Daniel O'Hanlon 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU General Public License as published by 8 | the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU General Public License for more details. 15 | 16 | You should have received a copy of the GNU General Public License 17 | along with this program. If not, see . 18 | 19 | */ 20 | 21 | /* 22 | Usage: 23 | transfer -s "path/to/file" 24 | transfer -c "HOST IP" 25 | */ 26 | 27 | #include 28 | #include 29 | #include 30 | #include "server.h" 31 | #include "client.h" 32 | 33 | #define USAGE "Usage is:\ntransfer -c 'HOST IP'\ntransfer -s 'path/to/file'\n" 34 | 35 | int main(int argc, char *argv[]) 36 | { 37 | if (argc != 3){ 38 | fprintf(stderr, USAGE); 39 | exit(1); 40 | } 41 | 42 | char *option = (argv[1]+1); 43 | char *str_arg = argv[2]; 44 | 45 | if (*option == 'c'){ 46 | printf("Client mode.\n"); 47 | client(str_arg); 48 | } 49 | else if (*option == 's'){ 50 | printf("Server mode.\n"); 51 | server(str_arg); 52 | } 53 | else{ 54 | printf(USAGE); 55 | exit(2); 56 | } 57 | 58 | return 0; 59 | } 60 | -------------------------------------------------------------------------------- /src/server.c: -------------------------------------------------------------------------------- 1 | /* 2 | server.c 3 | 4 | Copyright (C) 2012 Daniel O'Hanlon 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU General Public License as published by 8 | the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU General Public License for more details. 15 | 16 | You should have received a copy of the GNU General Public License 17 | along with this program. If not, see . 18 | 19 | */ 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | #include 31 | 32 | #include "server.h" 33 | 34 | const int backlog = 5; // Max 5 set by kernel ? 35 | const int opttrue = 1; 36 | const int nthreads = 5; 37 | 38 | extern int errno; 39 | extern int port; 40 | extern int kb_size; 41 | 42 | struct server_data 43 | { 44 | int clientfd; 45 | int client; 46 | struct sockaddr_storage client_addr; 47 | char *buffer; 48 | char *filename; 49 | long lSize; 50 | int thread_flag; 51 | }; 52 | 53 | int server(char *filename) 54 | { 55 | struct addrinfo *servinfo = 0; 56 | struct sockaddr_storage client_addr; 57 | struct server_data thread_arg[nthreads]; 58 | socklen_t addr_size = sizeof client_addr; 59 | 60 | int sockfd = 0; 61 | int clientfd[nthreads]; 62 | int client = 0; 63 | pthread_t thread[nthreads]; 64 | long lSize = 0; 65 | char * buffer; 66 | int i = 0; 67 | 68 | FILE *file; 69 | if((file = fopen(filename, "rb"))==NULL){ 70 | fprintf(stderr, "File Opening Error.\n"); 71 | exit(2); 72 | } 73 | 74 | fseek (file , 0 , SEEK_END); // Find EOF 75 | lSize = ftell (file); 76 | rewind (file); 77 | 78 | // allocate memory to contain the whole file: 79 | buffer = (char*) malloc (sizeof(char)*lSize); 80 | if (buffer == NULL) { 81 | fprintf(stderr, "Buffer Malloc Error\n"); 82 | exit (3); 83 | } 84 | 85 | // copy the file into the buffer: 86 | if (fread(buffer,1,lSize,file) != lSize) { 87 | fprintf(stderr, "Buffer Fill Error\n"); 88 | exit (4); 89 | } 90 | 91 | fclose(file); 92 | 93 | servinfo = filladdrinfos(servinfo); 94 | 95 | sockfd = makeserv(servinfo); 96 | 97 | /* 98 | Listen for incoming connections on 1234 99 | */ 100 | if(listen(sockfd, backlog)==-1){ 101 | fprintf(stderr, "Listen Error: %i\n", errno); 102 | } 103 | 104 | printf("Listening on port: %i \n",port); 105 | 106 | client = 0; 107 | /* 108 | Fill struct with thread arguments 109 | */ 110 | 111 | for (i = 0; i < nthreads; ++i){ 112 | memset(&thread_arg[i], 0, sizeof(thread_arg[i])); 113 | thread_arg[i].client_addr = client_addr; 114 | thread_arg[i].buffer = buffer; 115 | thread_arg[i].filename = filename; 116 | thread_arg[i].lSize = lSize; 117 | } 118 | 119 | /* 120 | Accept an incoming connection -> 5 in parallel 121 | */ 122 | while(1){ 123 | while(client < nthreads){ 124 | if ((clientfd[client] = accept(sockfd, (struct sockaddr *)&client_addr, &addr_size))){ 125 | 126 | thread_arg[client].clientfd = clientfd[client]; 127 | thread_arg[client].client = client; 128 | 129 | pthread_create(&thread[client], NULL, runserv, (void *)&thread_arg[client]); 130 | } 131 | client++; 132 | } 133 | 134 | for (i = 0; i < nthreads; ++i){ 135 | pthread_join(thread[i], NULL); 136 | } 137 | client = 0; 138 | for (i = 0; i < nthreads; ++i){ 139 | memset(&thread_arg[i], 0, sizeof(thread_arg[i])); 140 | thread_arg[i].client_addr = client_addr; 141 | thread_arg[i].buffer = buffer; 142 | thread_arg[i].filename = filename; 143 | thread_arg[i].lSize = lSize; 144 | } 145 | } 146 | /* 147 | Free our servinfo, and other assorted allocated goodies 148 | */ 149 | 150 | close(sockfd); 151 | freeaddrinfo(servinfo); 152 | free(buffer); 153 | 154 | return 0; 155 | } 156 | 157 | int sendf(int clientfd, char *buffer, int lSize) 158 | { 159 | int dsentlen = 0; 160 | int packet = 0; 161 | int remaining_bytes = 0; 162 | while(dsentlen!=lSize){ 163 | if((dsentlen += send(clientfd,&buffer[packet*kb_size], kb_size, 0))==-1){ 164 | fprintf(stderr, "Sending Error: %i\n", errno); 165 | } 166 | packet++; 167 | remaining_bytes = (lSize - packet*kb_size); 168 | if (remaining_bytes < kb_size){ 169 | /* send the last packet of < 1024 bytes, required */ 170 | if((dsentlen += send(clientfd,&buffer[packet*kb_size], remaining_bytes, 0))==-1){ 171 | fprintf(stderr, "Sending Error (last packet): %i\n", errno); 172 | } 173 | packet++; 174 | } 175 | } 176 | return dsentlen; 177 | } 178 | 179 | void *runserv(void *arg) 180 | { 181 | char peeripstr[INET_ADDRSTRLEN]; 182 | char reqmsg[100] = {0}; 183 | char lSizea[100] = {0}; 184 | char response[1] = {0}; 185 | int msentlen = 0; 186 | int dsentlen = 0; 187 | 188 | struct server_data *local_data; 189 | 190 | local_data = (struct server_data *)arg; 191 | 192 | int clientfd = (int)local_data->clientfd; 193 | int client = (int)local_data->client; 194 | struct sockaddr_storage client_addr = (struct sockaddr_storage)local_data->client_addr; 195 | char *buffer = (char *)local_data->buffer; 196 | char *filename = (char *)local_data->filename; 197 | long lSize = (long)local_data->lSize; 198 | int thread_flag = (int)local_data->thread_flag; 199 | 200 | struct sockaddr_in* pV4Addr = (struct sockaddr_in*)&client_addr; 201 | int ipAddr = pV4Addr->sin_addr.s_addr; 202 | inet_ntop(AF_INET, &ipAddr, peeripstr, sizeof peeripstr); 203 | 204 | printf("Client %i connected from %s.\n",client, peeripstr); 205 | 206 | snprintf(lSizea, 100, "%li",lSize); 207 | 208 | strncat(reqmsg, filename, strlen(filename)); 209 | strncat(reqmsg, ":", strlen(":")); 210 | strncat(reqmsg, lSizea, strlen(lSizea)); 211 | 212 | printf("Requesting to send file '%s' (%li) \n", filename, lSize); 213 | 214 | msentlen = send(clientfd, reqmsg, sizeof reqmsg, 0); 215 | printf("%s\n", reqmsg); 216 | recv(clientfd, response, 10, 0); 217 | 218 | if (strncmp(&response[0], "Y", 1) == 0){ 219 | printf("Request accepted. Sending file....\n"); 220 | 221 | dsentlen = sendf(clientfd, buffer, lSize); 222 | 223 | printf("Sent %i bytes, %g%%\n",dsentlen, ((float)dsentlen/(float)lSize)*100); 224 | 225 | thread_flag = 0; 226 | } 227 | 228 | thread_flag = 1; 229 | close(clientfd); 230 | 231 | return NULL; 232 | } 233 | 234 | void *filladdrinfos(struct addrinfo *servinfo) 235 | { 236 | int status = 0; 237 | struct addrinfo hints; 238 | char port_a[8] = {0}; 239 | 240 | snprintf(port_a, 8, "%d",port); 241 | /* 242 | Make sure hints is empty before we begin 243 | */ 244 | memset(&hints, 0, sizeof hints); 245 | /* 246 | Fill hints with some initial 'hint' info 247 | */ 248 | hints.ai_family = AF_INET; // ipv4 249 | hints.ai_socktype = SOCK_STREAM; // TCP 250 | hints.ai_flags = AI_PASSIVE; // use my IP 251 | /* 252 | Make a call to getaddrinfo with partially filled struct hints, ip, port 253 | and struct to fill with addrinfo. 254 | */ 255 | if((status = getaddrinfo(NULL, port_a, &hints, &servinfo))){ 256 | fprintf(stderr, "Addrinfo error: %s\n", gai_strerror(status)); 257 | } 258 | 259 | return servinfo; // Pointer, servinfo modified 260 | } 261 | 262 | int makeserv(struct addrinfo *servinfo) 263 | { 264 | int sockfd; 265 | if((sockfd = socket(servinfo->ai_family, servinfo->ai_socktype, servinfo->ai_protocol))==-1){ 266 | fprintf(stderr, "Socket error: %i\n", errno); 267 | exit(5); 268 | } 269 | 270 | if(setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &opttrue, sizeof(opttrue))==-1){ 271 | fprintf(stderr, "Socket Option Error: %i\n", errno); 272 | } 273 | 274 | if(bind(sockfd, servinfo->ai_addr, servinfo->ai_addrlen)==-1){ 275 | fprintf(stderr, "Bind Error: %i\n", errno); 276 | exit(6); 277 | } 278 | return sockfd; 279 | } 280 | -------------------------------------------------------------------------------- /src/server.h: -------------------------------------------------------------------------------- 1 | /* 2 | server.h 3 | 4 | Copyright (C) 2012 Daniel O'Hanlon 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU General Public License as published by 8 | the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU General Public License for more details. 15 | 16 | You should have received a copy of the GNU General Public License 17 | along with this program. If not, see . 18 | 19 | */ 20 | 21 | #ifndef _server_h 22 | #define _server_h 23 | 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | #include 31 | #include 32 | #include 33 | 34 | void *filladdrinfos(struct addrinfo *); 35 | 36 | int sendf(int, char *, int); // Already an implementation in socket.h 37 | 38 | void *runserv(void *arg); 39 | 40 | int makeserv(struct addrinfo *); 41 | 42 | int server(char *); 43 | 44 | #endif --------------------------------------------------------------------------------