Add OACK support to slirp TFTP server, by Anthony Liguori.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2440 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/slirp/tftp.c b/slirp/tftp.c
index c9946d6..b3947eb 100644
--- a/slirp/tftp.c
+++ b/slirp/tftp.c
@@ -120,6 +120,45 @@
return bytes_read;
}
+static int tftp_send_oack(struct tftp_session *spt,
+ const char *key, uint32_t value,
+ struct tftp_t *recv_tp)
+{
+ struct sockaddr_in saddr, daddr;
+ struct mbuf *m;
+ struct tftp_t *tp;
+ int n = 0;
+
+ m = m_get();
+
+ if (!m)
+ return -1;
+
+ memset(m->m_data, 0, m->m_size);
+
+ m->m_data += if_maxlinkhdr;
+ tp = (void *)m->m_data;
+ m->m_data += sizeof(struct udpiphdr);
+
+ tp->tp_op = htons(TFTP_OACK);
+ n += sprintf(tp->x.tp_buf + n, "%s", key) + 1;
+ n += sprintf(tp->x.tp_buf + n, "%u", value) + 1;
+
+ saddr.sin_addr = recv_tp->ip.ip_dst;
+ saddr.sin_port = recv_tp->udp.uh_dport;
+
+ daddr.sin_addr = spt->client_ip;
+ daddr.sin_port = spt->client_port;
+
+ m->m_len = sizeof(struct tftp_t) - 514 + n -
+ sizeof(struct ip) - sizeof(struct udphdr);
+ udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY);
+
+ return 0;
+}
+
+
+
static int tftp_send_error(struct tftp_session *spt,
u_int16_t errorcode, const char *msg,
struct tftp_t *recv_tp)
@@ -273,6 +312,8 @@
return;
}
+ k += 6; /* skipping octet */
+
/* do sanity checks on the filename */
if ((spt->filename[0] != '/')
@@ -297,6 +338,48 @@
return;
}
+ if (src[n - 1] != 0) {
+ tftp_send_error(spt, 2, "Access violation", tp);
+ return;
+ }
+
+ while (k < n) {
+ const char *key, *value;
+
+ key = src + k;
+ k += strlen(key) + 1;
+
+ if (k >= n) {
+ tftp_send_error(spt, 2, "Access violation", tp);
+ return;
+ }
+
+ value = src + k;
+ k += strlen(value) + 1;
+
+ if (strcmp(key, "tsize") == 0) {
+ int tsize = atoi(value);
+ struct stat stat_p;
+
+ if (tsize == 0 && tftp_prefix) {
+ char buffer[1024];
+ int len;
+
+ len = snprintf(buffer, sizeof(buffer), "%s/%s",
+ tftp_prefix, spt->filename);
+
+ if (stat(buffer, &stat_p) == 0)
+ tsize = stat_p.st_size;
+ else {
+ tftp_send_error(spt, 1, "File not found", tp);
+ return;
+ }
+ }
+
+ tftp_send_oack(spt, "tsize", tsize, tp);
+ }
+ }
+
tftp_send_data(spt, 1, tp);
}
