Merge branch 'master' of https://github.com/kenCode-de/c-ipfs

include/ipfs/namesys/namesys.h

@@ -82,6 +82,10 @@
     int IsTLD (char *s);
     int IsDomain (char *s);
 
+    typedef struct s_DNSResolver {
+        // TODO
+    } DNSResolver;
+
     int DNSResolverResolveOnce (DNSResolver *r, char **path, char *name);
     int workDomain (int output, DNSResolver *r, char *name);
     int parseEntry (char **Path, char *txt);

include/ipfs/path/path.h

@@ -1,16 +1,20 @@
 #ifndef IPFS_PATH_H
    #define IPFS_PATH_H
 
-   char *ErrPath[] = {
+   #ifdef IPFS_PATH_C
-       NULL,
+      char *ErrPath[] = {
-       // ErrBadPath is returned when a given path is incorrectly formatted
+         NULL,
-       "invalid 'ipfs ref' path",
+         // ErrBadPath is returned when a given path is incorrectly formatted
-       // Paths after a protocol must contain at least one component
+         "invalid 'ipfs ref' path",
-       "path must contain at least one component",
+         // Paths after a protocol must contain at least one component
-       "TODO: ErrCidDecode",
+         "path must contain at least one component",
-       NULL,
+         "TODO: ErrCidDecode",
-       "no link named %s under %s"
+         NULL,
-   };
+         "no link named %s under %s"
+      };
+   #else
+      extern char **ErrPath;
+   #endif // IPFS_PATH_C
 
    enum {
        ErrBadPath = 1,

namesys/dns.c

@@ -68,13 +68,6 @@ int DNSResolverResolveOnce (char **path, char *name)
         return ErrPipe;
     }
 
-    dnslink = malloc(strlen(domain) + sizeof(dlprefix));
-    if (!dnslink) {
-        return ErrAllocFailed;
-    }
-    strcpy (dnslink, dlprefix);
-    strcat (dnslink, domain);
-
     r = fork();
     switch(r) {
         case -1:
@@ -90,6 +83,14 @@ int DNSResolverResolveOnce (char **path, char *name)
             return ErrPipe;
         case 0: // child
             close(p2[STDIN_FILENO]); // we don't need to read at child process.
+
+            dnslink = malloc(strlen(domain) + sizeof(dlprefix));
+            if (!dnslink) {
+                return ErrAllocFailed;
+            }
+            strcpy (dnslink, dlprefix);
+            strcat (dnslink, domain);
+
             return workDomain (p2[STDOUT_FILENO], r, dnslink);
     }
     close(p2[STDOUT_FILENO]); // we don't need to write at main process.

namesys/proquint.c

@@ -1,18 +1,175 @@
 #include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
 #include "ipfs/namesys/namesys.h"
 #include "ipfs/cid/cid.h"
 #include "ipfs/path/path.h"
 
+const uint8_t  conse[] = {'b', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'r', 's', 't', 'v', 'z'};
+const uint8_t  vowse[] = {'a', 'i', 'o', 'u'};
+
+// Find decoded number from the encoded consonant.
+static inline int consd(char c)
+{
+    int i;
+
+    for (i = 0 ; i < sizeof(conse) ; i++) {
+        if (c == conse[i]) {
+            return i;
+        }
+    }
+
+    return 0;
+}
+
+// Find decoded number of encoded vowel.
+static inline int vowsd(char c)
+{
+    int i;
+
+    for (i = 0 ; i < sizeof(vowse) ; i++) {
+        if (c == vowse[i]) {
+            return i;
+        }
+    }
+
+    return 0;
+}
+
+/**
+* Tests if a given string is a Proquint identifier
+*
+* @param {string} str The candidate string.
+*
+* @return {bool} Whether or not it qualifies.
+* @return {error} Error
+*/
+int ProquintIsProquint(char *str)
+{
+    int i, c;
+
+    // if str is null, or length isn't 11 or don't have - at middle
+    if (!str || strlen(str) != 11 || str[5] != '-') {
+        return 0; // it's not a proquint
+    }
+
+    // run every position
+    for (i = 0 ; i < 11 ; i++) {
+        if (i == 5) i++; // skip -, already tested.
+        switch (i) {
+            case 1:
+            case 3:
+            case 7:
+            case 9:
+                // compare with vowse array
+                c = vowsd(str[i]);
+                if (str[i] != vowse[c]) {
+                    return 0; // it's not a proquint
+                }
+                break;
+            default: // 0,2,4,6,8,10
+                // compare with conse array
+                c = consd(str[i]);
+                if (str[i] != conse[c]) {
+                    return 0; // it's not a proquint
+                }
+        }
+    }
+
+    return 1; // passed on every value.
+}
+
+/**
+* Encodes an arbitrary byte slice into an identifier.
+*
+* @param {[]byte} buf Slice of bytes to encode.
+*
+* @return {string} The given byte slice as an identifier.
+*/
+char *ProquintEncode(char *buf)
+{
+    char *ret;
+    int i, c;
+    uint16_t n;
+
+    if (!buf) {
+        return NULL;
+    }
+
+    ret = malloc(12);
+    if (!ret) {
+        return NULL;
+    }
+
+    for (i = 0, c = 0; i < 4; i += 2) {
+        n = ((buf[i] & 0xff) << 8) | (buf[i + 1] & 0xff);
+
+        ret[c++] = conse[(n >> 12) & 0x0f];
+        ret[c++] = vowse[(n >> 10) & 0x03];
+        ret[c++] = conse[(n >> 6)  & 0x0f];
+        ret[c++] = vowse[(n >> 4)  & 0x03];
+        ret[c++] = conse[n         & 0x0f];
+        ret[c++] = '-';
+    }
+    ret[--c] = '\0';
+
+    return ret;
+}
+
+/**
+* Decodes an identifier into its corresponding byte slice.
+*
+* @param {string} str Identifier to convert.
+*
+* @return {[]byte} The identifier as a byte slice.
+*/
+char *ProquintDecode(char *str)
+{
+    char *ret;
+    int i, c;
+    uint16_t x;
+
+    // make sure its a valid Proquint string.
+    if (!ProquintIsProquint(str)) {
+        return NULL;
+    }
+
+    ret = malloc(4);
+    if (!ret) {
+        return NULL;
+    }
+
+    for (i = 0, c = 0 ; i < 11 ; i += 6) {
+        x =(consd(str[i + 0]) << 12) | \
+           (vowsd(str[i + 1]) << 10) | \
+           (consd(str[i + 2]) <<  6) | \
+           (vowsd(str[i + 3]) <<  4) | \
+           (consd(str[i + 4]) <<  0);
+
+        ret[c++] = x >> 8;
+        ret[c++] = x & 0xff;
+    }
+
+    return ret;
+}
+
 // resolveOnce implements resolver. Decodes the proquint string.
 int ProquintResolveOnce (char **p, char *name)
 {
-    int err = proquintIsProquint(name);
+    int err = ProquintIsProquint(name);
+    char buf[500];
 
     if (err) {
         *p = NULL;
         err = ErrInvalidProquint;
     } else {
-        err = pathFromString(p, proquintDecode(name));
+        err = ParsePath(buf, ProquintDecode(name));
+        if (!err) {
+            *p = malloc (strlen(buf) + 1);
+            if (p) {
+                strcpy(*p, buf);
+            }
+        }
     }
     return err;
 }

namesys/proquint_test.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+int ProquintIsProquint(char *str);
+char *ProquintEncode(char *buf);
+char *ProquintDecode(char *str);
+
+int main(void) {
+    char *r, *s;
+    int i;
+    char *p[] = {"lusab-babad", "gutih-tugad", "gutuk-bisog", "mudof-sakat",
+                 "haguz-biram", "mabiv-gibot", "natag-lisaf", "tibup-zujah",
+                 "tobog-higil", "todah-vobij", "sinid-makam", "budov-kuras",
+                 NULL};
+
+    for (i = 0 ; p[i] ; i++) {
+        r = ProquintDecode (p[i]);
+        if (r) {
+            struct in_addr ip_addr;
+            memcpy (&(ip_addr.s_addr), r, sizeof(ip_addr.s_addr));
+            printf ("%s\t%s", p[i], inet_ntoa(ip_addr));
+            s = ProquintEncode(r);
+            free (r);
+            if (s) {
+                printf ("\t%s", s);
+                free (s);
+            }
+            printf("\n");
+        }
+    }
+    return 0;
+}

path/path.c

@@ -1,6 +1,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <ipfs/cid/cid.h>
+#define IPFS_PATH_C
 #include <ipfs/path/path.h>
 
 // FromCid safely converts a cid.Cid type to a Path type
@@ -43,7 +44,7 @@ char** SplitN (char *p, char *delim, int n)
 
    r = calloc(sizeof(char*), n + 1); // splits plus NULL pointer termination
    if (!r) {
-      free(r);
+      free(rbuf);
       return NULL;
    }