cadcdev-svn-commits Mailing List for Cryptic Allusion DCDev (Page 37)

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- Log -----------------------------------------------------------------
commit 359c57ef6fba746c744f0dc0e770f7f88b48f486
Author: Lawrence Sebald <ljs...@us...>
Date:   Sat Jun 7 21:56:01 2014 -0400

    Fix formatting on getaddrinfo.c and update the CHANGELOG.

-----------------------------------------------------------------------

Summary of changes:
 doc/CHANGELOG                    |    2 +
 kernel/libc/koslib/getaddrinfo.c | 1072 +++++++++++++++++++-------------------
 2 files changed, 542 insertions(+), 532 deletions(-)

diff --git a/doc/CHANGELOG b/doc/CHANGELOG
index cc449f3..c2348d1 100644
--- a/doc/CHANGELOG
+++ b/doc/CHANGELOG
@@ -40,6 +40,8 @@ KallistiOS version 2.0.1 -----------------------------------------------
 - DC  Fixed full sector reading of non-data CDs (thanks to SWAT for pointing out
       that it needed fixing) [LS]
 - DC  Added many new matrix/vector math-related macros [Josh Pearson = JP]
+- *** Added libppp for dialup internet access to the addons tree [LS]
+- *** Added DNS resolver functions getaddrinfo() and gethostbyname() [LS]
 
 KallistiOS version 2.0.0 -----------------------------------------------
 - DC  Broadband Adapter driver fixes [Dan Potter == DP]
diff --git a/kernel/libc/koslib/getaddrinfo.c b/kernel/libc/koslib/getaddrinfo.c
index d3ff836..7f52e8b 100644
--- a/kernel/libc/koslib/getaddrinfo.c
+++ b/kernel/libc/koslib/getaddrinfo.c
@@ -59,10 +59,10 @@
 
 // These structs were all taken from RFC1035, page 26.
 typedef struct dnsmsg {
-	uint16_t id;         // Can be anything
-	uint16_t flags;      // Should have 0x0100 set for query, 0x8000 for response
-	uint16_t qdcount, ancount, nscount, arcount;
-	uint8_t data[];      // Payload
+    uint16_t id;         // Can be anything
+    uint16_t flags;      // Should have 0x0100 set for query, 0x8000 for response
+    uint16_t qdcount, ancount, nscount, arcount;
+    uint8_t data[];      // Payload
 } dnsmsg_t;
 
 static uint16_t qnum = 0;
@@ -106,77 +106,77 @@ static uint16_t qnum = 0;
      PTR    12
      MX     15
      TXT    16
-	 AAAA   28
+     AAAA   28
  */
 
 // Construct a DNS query for an A record by host name. "buf" should
 // be at least 1500 bytes, to make sure there's room.
 static size_t dns_make_query(const char *host, dnsmsg_t *buf, int ip4,
- 							int ip6) {
-	int i, o = 0, ls, t;
-
-	// Build up the header.
-	buf->id = htons(qnum++);
-	buf->flags = htons(0x0100);
-	buf->qdcount = htons(ip4 + ip6);
-	buf->ancount = htons(0);
-	buf->nscount = htons(0);
-	buf->arcount = htons(0);
-
-	/* Fill in the question section(s). */
-	ls = 0;
-
-	if(ip4) {
-		o = ls + 1;
-		t = strlen(host);
-
-		for(i = 0; i <= t; i++) {
-			if(host[i] == '.' || i == t) {
-				buf->data[ls] = (o - ls) - 1;
-				ls = o;
-				o++;
-			}
-			else {
-				buf->data[o++] = host[i];
-			}
-		}
-
-		buf->data[ls] = 0;
-
-		// Might be unaligned now... so just build it by hand.
-		buf->data[o++] = (uint8_t)(QTYPE_A >> 8);
-		buf->data[o++] = (uint8_t)QTYPE_A;
-		buf->data[o++] = 0x00;
-		buf->data[o++] = 0x01;
-		ls = o;
-	}
-
-	if(ip6) {
-		o = ls + 1;
-		t = strlen(host);
-
-		for(i = 0; i <= t; i++) {
-			if(host[i] == '.' || i == t) {
-				buf->data[ls] = (o - ls) - 1;
-				ls = o;
-				o++;
-			}
-			else {
-				buf->data[o++] = host[i];
-			}
-		}
-
-		buf->data[ls] = 0;
-
-		// Might be unaligned now... so just build it by hand.
-		buf->data[o++] = (uint8_t)(QTYPE_AAAA >> 8);
-		buf->data[o++] = (uint8_t)QTYPE_AAAA;
-		buf->data[o++] = 0x00;
-		buf->data[o++] = 0x01;
-	}
-
-	// Return the full message size.
-	return (size_t)(o + sizeof(dnsmsg_t));
+                             int ip6) {
+    int i, o = 0, ls, t;
+
+    // Build up the header.
+    buf->id = htons(qnum++);
+    buf->flags = htons(0x0100);
+    buf->qdcount = htons(ip4 + ip6);
+    buf->ancount = htons(0);
+    buf->nscount = htons(0);
+    buf->arcount = htons(0);
+
+    /* Fill in the question section(s). */
+    ls = 0;
+
+    if(ip4) {
+        o = ls + 1;
+        t = strlen(host);
+
+        for(i = 0; i <= t; i++) {
+            if(host[i] == '.' || i == t) {
+                buf->data[ls] = (o - ls) - 1;
+                ls = o;
+                o++;
+            }
+            else {
+                buf->data[o++] = host[i];
+            }
+        }
+
+        buf->data[ls] = 0;
+
+        // Might be unaligned now... so just build it by hand.
+        buf->data[o++] = (uint8_t)(QTYPE_A >> 8);
+        buf->data[o++] = (uint8_t)QTYPE_A;
+        buf->data[o++] = 0x00;
+        buf->data[o++] = 0x01;
+        ls = o;
+    }
+
+    if(ip6) {
+        o = ls + 1;
+        t = strlen(host);
+
+        for(i = 0; i <= t; i++) {
+            if(host[i] == '.' || i == t) {
+                buf->data[ls] = (o - ls) - 1;
+                ls = o;
+                o++;
+            }
+            else {
+                buf->data[o++] = host[i];
+            }
+        }
+
+        buf->data[ls] = 0;
+
+        // Might be unaligned now... so just build it by hand.
+        buf->data[o++] = (uint8_t)(QTYPE_AAAA >> 8);
+        buf->data[o++] = (uint8_t)QTYPE_AAAA;
+        buf->data[o++] = 0x00;
+        buf->data[o++] = 0x01;
+    }
+
+    // Return the full message size.
+    return (size_t)(o + sizeof(dnsmsg_t));
 }
 
 /* Resource records. A standard DNS response will have one query
@@ -210,507 +210,515 @@ static size_t dns_make_query(const char *host, dnsmsg_t *buf, int ip4,
 // at the given offset. The new offset (after the label) will be
 // returned.
 static int dns_skip_label(dnsmsg_t *resp, int o) {
-	int cnt;
+    int cnt;
 
-	// End of the label?
-	while(resp->data[o] != 0) {
-		// Is it a pointer?
-		if((resp->data[o] & 0xc0) == 0xc0)
-			return o + 2;
+    // End of the label?
+    while(resp->data[o] != 0) {
+        // Is it a pointer?
+        if((resp->data[o] & 0xc0) == 0xc0)
+            return o + 2;
 
-		// Skip this part.
-		cnt = resp->data[o++];
-		o += cnt;
-	}
+        // Skip this part.
+        cnt = resp->data[o++];
+        o += cnt;
+    }
 
-	// Skip the terminator
-	o++;
+    // Skip the terminator
+    o++;
 
-	return o;
+    return o;
 }
 
 // Scans through and copies out a label in the data payload,
 // starting at the given offset. The new offset (after the label)
 // will be returned as well as the label string.
 static int dns_copy_label(dnsmsg_t *resp, int o, char *outbuf) {
-	int cnt;
-	int rv = -1;
-
-	// Do each part.
-	outbuf[0] = 0;
-
-	for(;;) {
-		// Is it a pointer?
-		if((resp->data[o] & 0xc0) == 0xc0) {
-			int offs = ((resp->data[o] & ~0xc0) << 8) | resp->data[o + 1];
-			if (rv < 0)
-				rv = o + 2;
-			o = offs - sizeof(dnsmsg_t);
-		}
-		else {
-			cnt = resp->data[o++];
-			if(cnt) {
-				if(outbuf[0] != 0)
-					strcat(outbuf, ".");
-				strncat(outbuf, (char *)(resp->data + o), cnt);
-				o += cnt;
-			}
-			else {
-				break;
-			}
-		}
-	}
-
-	if(rv < 0)
-		return o;
-	else
-		return rv;
+    int cnt;
+    int rv = -1;
+
+    // Do each part.
+    outbuf[0] = 0;
+
+    for(;;) {
+        // Is it a pointer?
+        if((resp->data[o] & 0xc0) == 0xc0) {
+            int offs = ((resp->data[o] & ~0xc0) << 8) | resp->data[o + 1];
+
+            if(rv < 0)
+                rv = o + 2;
+
+            o = offs - sizeof(dnsmsg_t);
+        }
+        else {
+            cnt = resp->data[o++];
+
+            if(cnt) {
+                if(outbuf[0] != 0)
+                    strcat(outbuf, ".");
+
+                strncat(outbuf, (char *)(resp->data + o), cnt);
+                o += cnt;
+            }
+            else {
+                break;
+            }
+        }
+    }
+
+    if(rv < 0)
+        return o;
+    else
+        return rv;
 }
 
 /* Forward declaration... */
 static struct addrinfo *add_ipv4_ai(uint32_t ip, uint16_t port,
-									struct addrinfo *h, struct addrinfo *tail);
+                                    struct addrinfo *h, struct addrinfo *tail);
 static struct addrinfo *add_ipv6_ai(const struct in6_addr *ip, uint16_t port,
-									struct addrinfo *h, struct addrinfo *tail);
+                                    struct addrinfo *h, struct addrinfo *tail);
 
 // Parse a response packet from the DNS server. The IP address
 // will be filled in upon a successful return, otherwise the
 // return value will be <0.
 static int dns_parse_response(dnsmsg_t *resp, struct addrinfo *hints,
- 							 uint16_t port, struct addrinfo **res) {
-	int i, o, arecs;
-	uint16_t flags;
-	char tmp[64];
-	uint16_t ancnt, len;
-	struct addrinfo *ptr = NULL;
-
-	/* Check the flags first to see if it was successful. */
-	flags = ntohs(resp->flags);
-	if(!(flags & 0x8000)) {
-		/* Not our response! */
-		return EAI_AGAIN;
-	}
-
-	/* Did the server report an error? */
-	switch(flags & 0x000f) {
-		case 0:   /* No error */
-			break;
-
-		case 1:   /* Format error */
-		case 4:   /* Not implemented */
-		case 5:   /* Refused */
-		default:
-			return EAI_FAIL;
-
-		case 3:   /* Name error */
-			return EAI_NONAME;
-
-		case 2:   /* Server failure */
-			return EAI_AGAIN;
-	}
-
-	/* Getting zero answers is also a failure. */
-	ancnt = ntohs(resp->ancount);
-	if(ancnt < 1)
-		return EAI_NONAME;
-
-	/* If we have any query sections (should have at least one), skip 'em. */
-	o = 0;
-	len = ntohs(resp->qdcount);
-	for(i = 0; i < len; i++) {
-		/* Skip the label. */
-		o = dns_skip_label(resp, o);
-
-		/* And the two type fields. */
-		o += 4;
-	}
-
-	/* Ok, now the answer section (what we're interested in). */
-	arecs = 0;
-	for(i = 0; i < ancnt; i++) {
-		/* Copy out the label, in case we need it. */
-		o = dns_copy_label(resp, o, tmp);
-
-		/* Get the type code. If it's not A or AAAA, skip it. */
-		if(resp->data[o] == 0 && resp->data[o + 1] == 1 &&
-		   (hints->ai_family == AF_INET || hints->ai_family == AF_UNSPEC)) {
-			uint32_t addr;
-
-			o += 8;
-			len = (resp->data[o] << 8) | resp->data[o + 1];
-			o += 2;
-
-			/* Grab the address from the response. */
-			addr = htonl((resp->data[o] << 24) | (resp->data[o + 1] << 16) |
-			    	     (resp->data[o + 2] << 8) | resp->data[o + 3]);
-
-			/* Add this address to the chain. */
-			if(!(ptr = add_ipv4_ai(addr, port, hints, ptr)))
-				/* If something goes wrong in here, it's in calling malloc, so
-				   it is definitely a system error. */
-				return EAI_SYSTEM;
-
-			if(!*res)
-				*res = ptr;
-
-			o += len;
-			arecs++;
-		}
-		else if(resp->data[o] == 0 && resp->data[o + 1] == 28 &&
-		(hints->ai_family == AF_INET6 || hints->ai_family == AF_UNSPEC)) {
-			struct in6_addr addr;
-
-			o += 8;
-			len = (resp->data[o] << 8) | resp->data[o + 1];
-			o += 2;
-
-			/* Grab the address from the response. */
-			memcpy(addr.s6_addr, &resp->data[o], 16);
-
-			/* Add this address to the chain. */
-			if(!(ptr = add_ipv6_ai(&addr, port, hints, ptr)))
-				/* If something goes wrong in here, it's in calling malloc, so
-				   it is definitely a system error. */
-				return EAI_SYSTEM;
-
-			if(!*res)
-				*res = ptr;
-
-			o += len;
-			arecs++;
-		}
-		else if(resp->data[o] == 0 && resp->data[o + 1] == 5) {
-			char tmp2[64];
-
-			o += 8;
-			len = (resp->data[o] << 8) | resp->data[o + 1];
-			o += 2;
-			o = dns_copy_label(resp, o, tmp2);
-		}
-		else {
-			o += 8;
-			len = (resp->data[o] << 8) | resp->data[o + 1];
-			o += 2 + len;
-		}
-	}
-
-	/* Did we find something? */
-	return arecs > 0 ? 0 : EAI_NONAME;
+                              uint16_t port, struct addrinfo **res) {
+    int i, o, arecs;
+    uint16_t flags;
+    char tmp[64];
+    uint16_t ancnt, len;
+    struct addrinfo *ptr = NULL;
+
+    /* Check the flags first to see if it was successful. */
+    flags = ntohs(resp->flags);
+
+    if(!(flags & 0x8000)) {
+        /* Not our response! */
+        return EAI_AGAIN;
+    }
+
+    /* Did the server report an error? */
+    switch(flags & 0x000f) {
+        case 0:   /* No error */
+            break;
+
+        case 1:   /* Format error */
+        case 4:   /* Not implemented */
+        case 5:   /* Refused */
+        default:
+            return EAI_FAIL;
+
+        case 3:   /* Name error */
+            return EAI_NONAME;
+
+        case 2:   /* Server failure */
+            return EAI_AGAIN;
+    }
+
+    /* Getting zero answers is also a failure. */
+    ancnt = ntohs(resp->ancount);
+
+    if(ancnt < 1)
+        return EAI_NONAME;
+
+    /* If we have any query sections (should have at least one), skip 'em. */
+    o = 0;
+    len = ntohs(resp->qdcount);
+
+    for(i = 0; i < len; i++) {
+        /* Skip the label. */
+        o = dns_skip_label(resp, o);
+
+        /* And the two type fields. */
+        o += 4;
+    }
+
+    /* Ok, now the answer section (what we're interested in). */
+    arecs = 0;
+
+    for(i = 0; i < ancnt; i++) {
+        /* Copy out the label, in case we need it. */
+        o = dns_copy_label(resp, o, tmp);
+
+        /* Get the type code. If it's not A or AAAA, skip it. */
+        if(resp->data[o] == 0 && resp->data[o + 1] == 1 &&
+           (hints->ai_family == AF_INET || hints->ai_family == AF_UNSPEC)) {
+            uint32_t addr;
+
+            o += 8;
+            len = (resp->data[o] << 8) | resp->data[o + 1];
+            o += 2;
+
+            /* Grab the address from the response. */
+            addr = htonl((resp->data[o] << 24) | (resp->data[o + 1] << 16) |
+                         (resp->data[o + 2] << 8) | resp->data[o + 3]);
+
+            /* Add this address to the chain. */
+            if(!(ptr = add_ipv4_ai(addr, port, hints, ptr)))
+                /* If something goes wrong in here, it's in calling malloc, so
+                   it is definitely a system error. */
+                return EAI_SYSTEM;
+
+            if(!*res)
+                *res = ptr;
+
+            o += len;
+            arecs++;
+        }
+        else if(resp->data[o] == 0 && resp->data[o + 1] == 28 &&
+                (hints->ai_family == AF_INET6 || hints->ai_family == AF_UNSPEC)) {
+            struct in6_addr addr;
+
+            o += 8;
+            len = (resp->data[o] << 8) | resp->data[o + 1];
+            o += 2;
+
...<truncated>...


hooks/post-receive
-- 
A pseudo Operating System for the Dreamcast.




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