ubus: constify name argument to mdns_add_records

[project/mdnsd.git] / dns.c

diff --git a/dns.c b/dns.c
index 517825b..5390fe6 100644 (file)
--- a/dns.c
+++ b/dns.c
@@ -100,7 +100,7 @@ dns_send_packet(int fd, struct iovec *iov, int iov_len)
 }
 
 void
-dns_send_question(struct uloop_fd *u, char *question, int type)
+dns_send_question(struct uloop_fd *u, const char *question, int type)
 {
        static struct dns_header h = {
                .questions = cpu_to_be16(1),
@@ -157,7 +157,7 @@ dns_init_answer(void)
 }
 
 void
-dns_add_answer(int type, uint8_t *rdata, uint16_t rdlength)
+dns_add_answer(int type, const uint8_t *rdata, uint16_t rdlength)
 {
        struct dns_reply *a = &dns_reply[dns_answer_cnt];
        if (dns_answer_cnt == MAX_ANSWER)
@@ -169,7 +169,7 @@ dns_add_answer(int type, uint8_t *rdata, uint16_t rdlength)
 }
 
 void
-dns_send_answer(struct uloop_fd *u, char *answer)
+dns_send_answer(struct uloop_fd *u, const char *answer)
 {
        uint8_t buffer[256];
        struct dns_header h = { 0 };
@@ -182,10 +182,7 @@ dns_send_answer(struct uloop_fd *u, char *answer)
        h.answers = __cpu_to_be16(dns_answer_cnt);
        h.flags = __cpu_to_be16(0x8400);
 
-       iov = malloc(sizeof(struct iovec) * ((dns_answer_cnt * 3) + 1));
-       if (!iov)
-               return;
-
+       iov = alloca(sizeof(struct iovec) * ((dns_answer_cnt * 3) + 1));
        iov[0].iov_base = &h;
        iov[0].iov_len = sizeof(struct dns_header);
 
@@ -226,7 +223,7 @@ dns_send_answer(struct uloop_fd *u, char *answer)
 }
 
 static int
-scan_name(uint8_t *buffer, int len)
+scan_name(const uint8_t *buffer, int len)
 {
        int offset = 0;
 
@@ -309,7 +306,7 @@ dns_consume_answer(uint8_t **data, int *len)
 }
 
 char*
-dns_consume_name(uint8_t *base, int blen, uint8_t **data, int *len)
+dns_consume_name(const uint8_t *base, int blen, uint8_t **data, int *len)
 {
        int nlen = scan_name(*data, *len);