* This file is licenced under the 3-clause BSD Licence. See the file
* COPYING for full details.
*/
+#include <stdlib.h>
#include <stdio.h>
+#include <string.h>
+#include <ctype.h> // isspace
+#include <stdarg.h>
+#include <regex.h>
+#include <ncurses.h>
+
+#include <unistd.h> // close
+#include <netdb.h> // gethostbyname
+#include <pwd.h> // getpwuids
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <openssl/sha.h> // SHA1
+
+#define USE_NCURSES_INTERFACE 0
+
+// === TYPES ===
+typedef struct sItem {
+ char *Ident;
+ char *Desc;
+ int Price;
+} tItem;
+
+// === PROTOTYPES ===
+ int ShowNCursesUI(void);
+void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
+
+ int sendf(int Socket, const char *Format, ...);
+
+ int OpenConnection(const char *Host, int Port);
+ int Authenticate(int Socket);
+void PopulateItemList(int Socket);
+ int DispenseItem(int Socket, int ItemID);
+
+char *trim(char *string);
+ int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
+void CompileRegex(regex_t *regex, const char *pattern, int flags);
// === GLOBALS ===
-char *gsDispenseServer = "martello";
+char *gsDispenseServer = "localhost";
int giDispensePort = 11020;
+tItem *gaItems;
+ int giNumItems;
+regex_t gArrayRegex, gItemRegex, gSaltRegex;
+
+char *gsOverrideUser;
// === CODE ===
int main(int argc, char *argv[])
{
+ int sock;
+ int i;
+ char buffer[BUFSIZ];
+
+ // -- Create regular expressions
+ // > Code Type Count ...
+ CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED); //
+ // > Code Type Ident Price Desc
+ CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z0-9:]+?)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
+ // > Code 'SALT' salt
+ CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+(.+)\\s+(.+)$", REG_EXTENDED);
+
// Connect to server
+ sock = OpenConnection(gsDispenseServer, giDispensePort);
+ if( sock < 0 ) return -1;
+
+ // Authenticate
+ Authenticate(sock);
+
+ // Parse Arguments
+ for( i = 1; i < argc; i ++ )
+ {
+ char *arg = argv[i];
+
+ if( arg[0] == '-' ) {
+
+ switch(arg[1])
+ {
+ case 'u': // Override User
+ gsOverrideUser = argv[++i];
+ break;
+ }
+
+ continue;
+ }
+ if( strcmp(argv[1], "acct") == 0 ) {
+ // Alter account
+ // List accounts
+ return 0;
+ }
+ else {
+ // Item name / pattern
+ }
+ }
+
+ // Get items
+ PopulateItemList(sock);
+
+ #if USE_NCURSES_INTERFACE
+ i = ShowNCursesUI();
+ #else
+ for( i = 0; i < giNumItems; i ++ ) {
+ printf("%2i %s\t%3i %s\n", i, gaItems[i].Ident, gaItems[i].Price, gaItems[i].Desc);
+ }
+ printf(" q Quit\n");
+ for(;;)
+ {
+ char *buf;
+
+ i = -1;
+
+ fgets(buffer, BUFSIZ, stdin);
+
+ buf = trim(buffer);
+
+ if( buf[0] == 'q' ) break;
+
+ i = atoi(buf);
+
+ if( i != 0 || buf[0] == '0' )
+ {
+ if( i < 0 || i >= giNumItems ) {
+ printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
+ continue;
+ }
+ break;
+ }
+ }
+ #endif
+
+ // Check for a valid item ID
+ if( i >= 0 )
+ DispenseItem(sock, i);
+
+ close(sock);
+
+ return 0;
+}
+
+/**
+ * \brief Show item \a Index at (\a Col, \a Row)
+ * \note Part of the NCurses UI
+ */
+void ShowItemAt(int Row, int Col, int Width, int Index)
+{
+ int _x, _y, times;
+ move( Row, Col );
+
+ if( Index < 0 || Index >= giNumItems ) {
+ printw("%02i OOR", Index);
+ return ;
+ }
+ printw("%02i %s", Index, gaItems[Index].Desc);
+
+ getyx(stdscr, _y, _x);
+ // Assumes max 4 digit prices
+ times = Width - 4 - (_x - Col); // TODO: Better handling for large prices
+ while(times--) addch(' ');
+ printw("%4i", gaItems[Index].Price);
+}
- // Determine what to do
- if( argc > 1 )
+/**
+ * \brief Render the NCurses UI
+ */
+int ShowNCursesUI(void)
+{
+ // TODO: ncurses interface (with separation between item classes)
+ // - Hmm... that would require standardising the item ID to be <class>:<index>
+ // Oh, why not :)
+ int ch;
+ int i, times;
+ int xBase, yBase;
+ const int displayMinWidth = 40;
+ const int displayMinItems = 8;
+ char *titleString = "Dispense";
+ int itemCount = displayMinItems;
+ int itemBase = 0;
+
+ int height = itemCount + 3;
+ int width = displayMinWidth;
+
+ // Enter curses mode
+ initscr();
+ raw(); noecho();
+
+ xBase = COLS/2 - width/2;
+ yBase = LINES/2 - height/2;
+
+ for( ;; )
{
- if( strcmp(argv[1], "acct") == 0 )
+ // Header
+ PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
+
+ // Items
+ for( i = 0; i < itemCount; i ++ )
{
- return 0;
+ move( yBase + 1 + i, xBase );
+ addch('|');
+ addch(' ');
+
+ // Check for ... row
+ if( i == 0 && itemBase > 0 ) {
+ printw(" ...");
+ times = width - 1 - 8;
+ while(times--) addch(' ');
+ }
+ else if( i == itemCount - 1 && itemBase < giNumItems - itemCount ) {
+ printw(" ...");
+ times = width - 1 - 8;
+ while(times--) addch(' ');
+ }
+ // Show an item
+ else {
+ ShowItemAt( yBase + 1 + i, xBase + 2, width - 4, itemBase + i);
+ addch(' ');
+ }
+
+ // Scrollbar (if needed)
+ if( giNumItems > itemCount ) {
+ if( i == 0 ) {
+ addch('A');
+ }
+ else if( i == itemCount - 1 ) {
+ addch('V');
+ }
+ else {
+ int percentage = itemBase * 100 / (giNumItems-itemCount);
+ if( i-1 == percentage*(itemCount-3)/100 ) {
+ addch('#');
+ }
+ else {
+ addch('|');
+ }
+ }
+ }
+ else {
+ addch('|');
+ }
+ }
+
+ // Footer
+ PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
+
+ // Get input
+ ch = getch();
+
+ if( ch == '\x1B' ) {
+ ch = getch();
+ if( ch == '[' ) {
+ ch = getch();
+
+ switch(ch)
+ {
+ case 'B':
+ if( itemBase < giNumItems - (itemCount) )
+ itemBase ++;
+ break;
+ case 'A':
+ if( itemBase > 0 )
+ itemBase --;
+ break;
+ }
+ }
+ else {
+
+ }
+ }
+ else {
+ break;
+ }
+
+ }
+
+
+ // Leave
+ endwin();
+ return -1;
+}
+
+/**
+ * \brief Print a three-part string at the specified position (formatted)
+ * \note NCurses UI Helper
+ *
+ * Prints \a Left on the left of the area, \a Right on the righthand side
+ * and \a Mid in the middle of the area. These are padded with \a Pad1
+ * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
+ *
+ * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
+ * and the arguments to these are read in that order.
+ */
+void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
+ const char *Mid, char Pad2, const char *Right, ...)
+{
+ int lLen, mLen, rLen;
+ int times;
+
+ va_list args;
+
+ // Get the length of the strings
+ va_start(args, Right);
+ lLen = vsnprintf(NULL, 0, Left, args);
+ mLen = vsnprintf(NULL, 0, Mid, args);
+ rLen = vsnprintf(NULL, 0, Right, args);
+ va_end(args);
+
+ // Sanity check
+ if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
+ return ; // TODO: What to do?
+ }
+
+ move(Row, Col);
+
+ // Render strings
+ va_start(args, Right);
+ // - Left
+ {
+ char tmp[lLen+1];
+ vsnprintf(tmp, lLen+1, Left, args);
+ addstr(tmp);
+ }
+ // - Left padding
+ times = Width/2 - mLen/2 - lLen;
+ while(times--) addch(Pad1);
+ // - Middle
+ {
+ char tmp[mLen+1];
+ vsnprintf(tmp, mLen+1, Mid, args);
+ addstr(tmp);
+ }
+ // - Right Padding
+ times = Width/2 - mLen/2 - rLen;
+ while(times--) addch(Pad2);
+ // - Right
+ {
+ char tmp[rLen+1];
+ vsnprintf(tmp, rLen+1, Right, args);
+ addstr(tmp);
+ }
+}
+
+// === HELPERS ===
+int sendf(int Socket, const char *Format, ...)
+{
+ va_list args;
+ int len;
+
+ va_start(args, Format);
+ len = vsnprintf(NULL, 0, Format, args);
+ va_end(args);
+
+ {
+ char buf[len+1];
+ va_start(args, Format);
+ vsnprintf(buf, len+1, Format, args);
+ va_end(args);
+
+ return send(Socket, buf, len, 0);
+ }
+}
+
+int OpenConnection(const char *Host, int Port)
+{
+ struct hostent *host;
+ struct sockaddr_in serverAddr;
+ int sock;
+
+ host = gethostbyname(Host);
+ if( !host ) {
+ fprintf(stderr, "Unable to look up '%s'\n", Host);
+ return -1;
+ }
+
+ memset(&serverAddr, 0, sizeof(serverAddr));
+
+ serverAddr.sin_family = AF_INET; // IPv4
+ // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
+ serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
+ serverAddr.sin_port = htons(Port);
+
+ sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if( sock < 0 ) {
+ fprintf(stderr, "Failed to create socket\n");
+ return -1;
+ }
+
+ #if USE_AUTOAUTH
+ {
+ struct sockaddr_in localAddr;
+ memset(&localAddr, 0, sizeof(localAddr));
+ localAddr.sin_family = AF_INET; // IPv4
+ localAddr.sin_port = 1023; // IPv4
+ // Attempt to bind to low port for autoauth
+ bind(sock, &localAddr, sizeof(localAddr));
+ }
+ #endif
+
+ if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
+ fprintf(stderr, "Failed to connect to server\n");
+ return -1;
+ }
+
+ return sock;
+}
+
+/**
+ * \brief Authenticate with the server
+ * \return Boolean Failure
+ */
+int Authenticate(int Socket)
+{
+ struct passwd *pwd;
+ char buf[512];
+ int responseCode;
+ char salt[32];
+ int i;
+ regmatch_t matches[4];
+
+ // Get user name
+ pwd = getpwuid( getuid() );
+
+ // Attempt automatic authentication
+ sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
+
+ // Check if it worked
+ recv(Socket, buf, 511, 0);
+ trim(buf);
+
+ responseCode = atoi(buf);
+ switch( responseCode )
+ {
+ case 200: // Authenticated, return :)
+ return 0;
+ case 401: // Untrusted, attempt password authentication
+ sendf(Socket, "USER %s\n", pwd->pw_name);
+ printf("Using username %s\n", pwd->pw_name);
+
+ recv(Socket, buf, 511, 0);
+ trim(buf);
+ // TODO: Get Salt
+ // Expected format: 100 SALT <something> ...
+ // OR : 100 User Set
+ RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
+ responseCode = atoi(buf);
+ if( responseCode != 100 ) {
+ fprintf(stderr, "Unknown repsonse code %i from server\n", responseCode);
+ return -1; // ERROR
}
+
+ // Check for salt
+ if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
+ memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
+ salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
+ }
+
+ // Get password
+ fflush(stdout);
+
+ // Give three attempts
+ for( i = 0; i < 3; i ++ )
+ {
+ int ofs = strlen(pwd->pw_name)+strlen(salt);
+ char tmp[ofs+20];
+ char *pass = getpass("Password: ");
+ uint8_t h[20];
+
+ // Create hash string
+ // <username><salt><hash>
+ strcpy(tmp, pwd->pw_name);
+ strcat(tmp, salt);
+ SHA1( (unsigned char*)pass, strlen(pass), h );
+ memcpy(tmp+ofs, h, 20);
+
+ // Hash all that
+ SHA1( (unsigned char*)tmp, ofs+20, h );
+ sprintf(buf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
+ h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
+ h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
+ );
+ fflush(stdout); // Debug
+
+ // Send password
+ sendf(Socket, "PASS %s\n", buf);
+ recv(Socket, buf, 511, 0);
+
+ responseCode = atoi(buf);
+ // Auth OK?
+ if( responseCode == 200 ) break;
+ // Bad username/password
+ if( responseCode == 401 ) continue;
+
+ fprintf(stderr, "Unknown repsonse code %i from server\n", responseCode);
+ return -1;
+ }
+ return 2; // 2 = Bad Password
+
+ case 404: // Bad Username
+ fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
+ return 1;
+
+ default:
+ fprintf(stderr, "Unkown response code %i from server\n", responseCode);
+ printf("%s\n", buf);
+ return -1;
}
+
+ printf("%s\n", buf);
+ return 0; // Seems OK
+}
+void PopulateItemList(int Socket)
+{
+ char buffer[BUFSIZ];
+ int len;
+ int responseCode;
+
+ char *itemType, *itemStart;
+ int count, i;
+ regmatch_t matches[4];
+
// Ask server for stock list
+ send(Socket, "ENUM_ITEMS\n", 11, 0);
+ len = recv(Socket, buffer, BUFSIZ-1, 0);
+ buffer[len] = '\0';
+
+ trim(buffer);
- // Display the list for the user
- // and choose what to dispense
+ //printf("Output: %s\n", buffer);
+
+ responseCode = atoi(buffer);
+ if( responseCode != 201 ) {
+ fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
+ exit(-1);
+ }
+
+ // - Get item list -
+
+ // Expected format: 201 Items <count> <item1> <item2> ...
+ RunRegex(&gArrayRegex, buffer, 4, matches, "Malformed server response");
+
+ itemType = &buffer[ matches[2].rm_so ]; buffer[ matches[2].rm_eo ] = '\0';
+ count = atoi( &buffer[ matches[3].rm_so ] );
+
+ // Check array type
+ if( strcmp(itemType, "Items") != 0 ) {
+ // What the?!
+ fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
+ itemType);
+ exit(-1);
+ }
+
+ itemStart = &buffer[ matches[3].rm_eo ];
+
+ gaItems = malloc( count * sizeof(tItem) );
+
+ for( giNumItems = 0; giNumItems < count && itemStart; giNumItems ++ )
+ {
+ char *next = strchr( ++itemStart, ' ' );
+ if( next ) *next = '\0';
+ gaItems[giNumItems].Ident = strdup(itemStart);
+ itemStart = next;
+ }
+
+ // Fetch item information
+ for( i = 0; i < giNumItems; i ++ )
+ {
+ regmatch_t matches[6];
+
+ // Get item info
+ sendf(Socket, "ITEM_INFO %s\n", gaItems[i].Ident);
+ len = recv(Socket, buffer, BUFSIZ-1, 0);
+ buffer[len] = '\0';
+ trim(buffer);
+
+ responseCode = atoi(buffer);
+ if( responseCode != 202 ) {
+ fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
+ exit(-1);
+ }
+
+ RunRegex(&gItemRegex, buffer, 6, matches, "Malformed server response");
+
+ buffer[ matches[3].rm_eo ] = '\0';
+
+ gaItems[i].Price = atoi( buffer + matches[4].rm_so );
+ gaItems[i].Desc = strdup( buffer + matches[5].rm_so );
+ }
+}
- return 0;
+int DispenseItem(int Socket, int ItemID)
+{
+ int len, responseCode;
+ char buffer[BUFSIZ];
+
+ if( ItemID < 0 || ItemID > giNumItems ) return -1;
+
+ // Dispense!
+ sendf(Socket, "DISPENSE %s\n", gaItems[ItemID].Ident);
+ len = recv(Socket, buffer, BUFSIZ-1, 0);
+ buffer[len] = '\0';
+ trim(buffer);
+
+ responseCode = atoi(buffer);
+ switch( responseCode )
+ {
+ case 200:
+ printf("Dispense OK\n");
+ return 0;
+ case 401:
+ printf("Not authenticated\n");
+ return 1;
+ case 402:
+ printf("Insufficient balance\n");
+ return 1;
+ case 406:
+ printf("Bad item name, bug report\n");
+ return 1;
+ case 500:
+ printf("Item failed to dispense, is the slot empty?\n");
+ return 1;
+ case 501:
+ printf("Dispense not possible (slot empty/permissions)\n");
+ return 1;
+ default:
+ printf("Unknown response code %i ('%s')\n", responseCode, buffer);
+ return -2;
+ }
+}
+
+char *trim(char *string)
+{
+ int i;
+
+ while( isspace(*string) )
+ string ++;
+
+ for( i = strlen(string); i--; )
+ {
+ if( isspace(string[i]) )
+ string[i] = '\0';
+ else
+ break;
+ }
+
+ return string;
+}
+
+int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
+{
+ int ret;
+
+ ret = regexec(regex, string, nMatches, matches, 0);
+ if( ret ) {
+ size_t len = regerror(ret, regex, NULL, 0);
+ char errorStr[len];
+ regerror(ret, regex, errorStr, len);
+ printf("string = '%s'\n", string);
+ fprintf(stderr, "%s\n%s", errorMessage, errorStr);
+ exit(-1);
+ }
+
+ return ret;
+}
+
+void CompileRegex(regex_t *regex, const char *pattern, int flags)
+{
+ int ret = regcomp(regex, pattern, flags);
+ if( ret ) {
+ size_t len = regerror(ret, regex, NULL, 0);
+ char errorStr[len];
+ regerror(ret, regex, errorStr, len);
+ fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
+ exit(-1);
+ }
}
git.ucc.asn.au / tpg / opendispense2.git / blobdiff
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