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Add OACK support to slirp TFTP server, by Anthony Liguori.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2440 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-02-20 00:07:50 +00:00
parent 47d5d01a45
commit 1f697db9c3
2 changed files with 84 additions and 0 deletions
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83
slirp/tftp.c
View File

@ -120,6 +120,45 @@ static int tftp_read_data(struct tftp_session *spt, u_int16_t block_nr,
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 @@ static void tftp_handle_rrq(struct tftp_t *tp, int pktlen)
return;
}
k += 6; /* skipping octet */
/* do sanity checks on the filename */
if ((spt->filename[0] != '/')
@ -297,6 +338,48 @@ static void tftp_handle_rrq(struct tftp_t *tp, int pktlen)
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);
}

1
slirp/tftp.h
View File

@ -9,6 +9,7 @@
#define TFTP_DATA 3
#define TFTP_ACK 4
#define TFTP_ERROR 5
#define TFTP_OACK 6
#define TFTP_FILENAME_MAX 512