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https://github.com/yarrick/iodine.git
synced 2024-11-03 06:57:27 +00:00
moved method that encoded strings to dnsnames to read.c and renamed it to putname
This commit is contained in:
parent
c538bd0b6d
commit
16e9df4164
45
src/dns.c
45
src/dns.c
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@ -60,7 +60,9 @@ dns_encode(char *buf, size_t buflen, struct query *q, qr_t qr, char *data, size_
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header->qdcount = htons(1);
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name = 0xc000 | ((p - buf) & 0x3fff);
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p += dns_encode_hostname(q->name, p, strlen(q->name));
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putname(&p, 256, q->name);
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putshort(&p, q->type);
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putshort(&p, C_IN);
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@ -69,11 +71,6 @@ dns_encode(char *buf, size_t buflen, struct query *q, qr_t qr, char *data, size_
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putshort(&p, C_IN);
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putlong(&p, 0);
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/*
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* XXX: This is jidder! This is used to detect if there's packets to be sent.
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*/
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q->id = 0;
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putshort(&p, datalen);
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putdata(&p, data, datalen);
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break;
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@ -81,7 +78,7 @@ dns_encode(char *buf, size_t buflen, struct query *q, qr_t qr, char *data, size_
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header->qdcount = htons(1);
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header->arcount = htons(1);
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p += dns_encode_hostname(data, p, datalen);
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putname(&p, 256, data);
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putshort(&p, q->type);
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putshort(&p, C_IN);
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@ -215,37 +212,3 @@ dns_build_hostname(char *buf, size_t buflen,
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return written;
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}
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int
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dns_encode_hostname(const char *host, char *buffer, int size)
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{
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char *h;
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char *p;
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char *word;
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int left;
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h = strdup(host);
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memset(buffer, 0, size);
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p = buffer;
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left = size;
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word = strtok(h, ".");
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while(word) {
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if (strlen(word) > 63 || strlen(word) > left) {
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free(h);
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return -1;
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}
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left -= (strlen(word) + 1);
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*p++ = (char)strlen(word);
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memcpy(p, word, strlen(word));
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p += strlen(word);
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word = strtok(NULL, ".");
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}
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*p++ = 0;
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free(h);
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return p - buffer;
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}
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@ -25,7 +25,6 @@ typedef enum {
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} qr_t;
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int dns_build_hostname(char *, size_t, const char *, const size_t, const char *);
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int dns_encode_hostname(const char *, char *, int);
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int dns_encode(char *, size_t, struct query *, qr_t, char *, size_t);
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int dns_decode(char *, size_t, struct query *, qr_t, char *, size_t);
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36
src/read.c
36
src/read.c
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@ -16,6 +16,7 @@
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#include <string.h>
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#include <stdint.h>
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#include <stdlib.h>
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static int
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readname_loop(char *packet, int packetlen, char **src, char *dst, size_t length, size_t loop)
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@ -124,6 +125,41 @@ readdata(char *packet, char **src, char *dst, size_t len)
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return len;
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}
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int
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putname(char **buf, size_t buflen, const char *host)
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{
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char *word;
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int left;
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char *h;
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char *p;
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h = strdup(host);
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left = buflen;
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p = *buf;
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word = strtok(h, ".");
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while(word) {
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if (strlen(word) > 63 || strlen(word) > left) {
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free(h);
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return -1;
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}
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left -= (strlen(word) + 1);
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*p++ = (char)strlen(word);
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memcpy(p, word, strlen(word));
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p += strlen(word);
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word = strtok(NULL, ".");
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}
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*p++ = 0;
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free(h);
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*buf = p;
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return buflen - left;
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}
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int
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putbyte(char **dst, char value)
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{
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@ -22,6 +22,7 @@ int readshort(char *, char **, short *);
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int readlong(char *, char **, uint32_t *);
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int readdata(char *, char **, char *, size_t);
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int putname(char **, size_t, const char *);
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int putbyte(char **, char);
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int putshort(char **, short);
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int putlong(char **, uint32_t);
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