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compression in server response
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parent
d2f691a21b
commit
ae37edcb77
21
dns.c
21
dns.c
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@ -352,7 +352,6 @@ dns_read(int fd, char *buf, int buflen)
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return 0;
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}
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static int
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host2dns(const char *host, char *buffer, int size)
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{
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@ -386,6 +385,7 @@ dnsd_send(int fd, struct query *q, char *data, int datalen)
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int len;
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char *p;
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char buf[64*1024];
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short name;
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HEADER *header;
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memset(buf, 0, sizeof(buf));
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@ -406,24 +406,21 @@ dnsd_send(int fd, struct query *q, char *data, int datalen)
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p = buf + sizeof(HEADER);
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name = 0xc000 | ((p - buf) & 0x3fff);
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p += host2dns(q->name, p, strlen(q->name));
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PUTSHORT(q->type, p);
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PUTSHORT(C_IN, p);
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p += host2dns(q->name, p, strlen(q->name));
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PUTSHORT(name, p);
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PUTSHORT(q->type, p);
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PUTSHORT(C_IN, p);
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PUTLONG(0, p);
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q->id = 0;
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if(datalen > 0) {
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PUTSHORT(datalen, p);
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memcpy(p, data, datalen);
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p += datalen;
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} else {
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PUTSHORT(0, p);
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}
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PUTSHORT(datalen, p);
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memcpy(p, data, datalen);
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p += datalen;
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len = p - buf;
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sendto(fd, buf, len, 0, (struct sockaddr*)&q->from, q->fromlen);
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@ -481,9 +478,7 @@ dnsd_read(int fd, struct query *q, char *buf, int buflen)
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addrlen = sizeof(struct sockaddr);
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r = recvfrom(fd, packet, sizeof(packet), 0, (struct sockaddr*)&from, &addrlen);
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if(r == -1) {
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perror("recvfrom");
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} else {
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if (r >= sizeof(HEADER)) {
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header = (HEADER*)packet;
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id = ntohs(header->id);
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@ -508,6 +503,8 @@ dnsd_read(int fd, struct query *q, char *buf, int buflen)
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return decodepacket(name, buf, buflen);
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}
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}
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} else {
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perror("recvfrom");
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}
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return 0;
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