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Added support to parse and encode AAAA RRs

This commit is contained in:
A Weinlein 2012-12-21 18:02:11 +01:00
parent 1fec5f7dac
commit 501803d9d3
2 changed files with 31 additions and 0 deletions
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24
mdns.c
View File

@ -378,6 +378,13 @@ struct rr_entry *rr_create_a(uint8_t *name, uint32_t addr) {
return rr;
}
struct rr_entry *rr_create_aaaa(uint8_t *name, struct in6_addr *addr) {
DECL_MALLOC_ZERO_STRUCT(rr, rr_entry);
FILL_RR_ENTRY(rr, name, RR_AAAA);
rr->data.AAAA.addr = addr;
return rr;
}
struct rr_entry *rr_create_srv(uint8_t *name, uint16_t port, uint8_t *target) {
DECL_MALLOC_ZERO_STRUCT(rr, rr_entry);
FILL_RR_ENTRY(rr, name, RR_SRV);
@ -649,6 +656,18 @@ static size_t mdns_parse_rr(uint8_t *pkt_buf, size_t pkt_len, size_t off,
p += sizeof(uint32_t);
break;
case RR_AAAA:
if (rr_data_len < sizeof(struct in6_addr)) {
DEBUG_PRINTF("invalid rr_data_len=%lu for AAAA record\n", rr_data_len);
parse_error = 1;
break;
}
rr->data.AAAA.addr = malloc(sizeof(struct in6_addr));
for (int i = 0; i < sizeof(struct in6_addr); i++)
rr->data.AAAA.addr->s6_addr[i] = p[i];
p += sizeof(struct in6_addr);
break;
case RR_PTR:
rr->data.PTR.name = uncompress_nlabel(pkt_buf, pkt_len, p - pkt_buf);
if (rr->data.PTR.name == NULL) {
@ -838,6 +857,11 @@ static size_t mdns_encode_rr(uint8_t *pkt_buf, size_t pkt_len, size_t off,
p = mdns_write_u32(p, htonl(rr->data.A.addr));
break;
case RR_AAAA:
for (i = 0; i < sizeof(struct in6_addr); i++)
*p++ = rr->data.AAAA.addr->s6_addr[i];
break;
case RR_PTR:
label = rr->data.PTR.name ?
rr->data.PTR.name :

7
mdns.h
View File

@ -32,6 +32,7 @@
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#define MALLOC_ZERO_STRUCT(x, type) \
x = malloc(sizeof(struct type)); \
@ -76,6 +77,10 @@ struct rr_data_a {
uint32_t addr;
};
struct rr_data_aaaa {
struct in6_addr *addr;
};
struct rr_entry {
uint8_t *name;
@ -106,6 +111,7 @@ struct rr_entry {
struct rr_data_txt TXT;
struct rr_data_ptr PTR;
struct rr_data_a A;
struct rr_data_aaaa AAAA;
} data;
};
@ -168,6 +174,7 @@ void rr_list_destroy(struct rr_list *rr, char destroy_items);
struct rr_entry *rr_create_ptr(uint8_t *name, struct rr_entry *d_rr);
struct rr_entry *rr_create_srv(uint8_t *name, uint16_t port, uint8_t *target);
struct rr_entry *rr_create_aaaa(uint8_t *name, struct in6_addr *addr);
struct rr_entry *rr_create_a(uint8_t *name, uint32_t addr);
struct rr_entry *rr_create(uint8_t *name, enum rr_type type);
void rr_set_nsec(struct rr_entry *rr_nsec, enum rr_type type);