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m---------slirp0
-rw-r--r--slirp/src/tftp.c463
2 files changed, 0 insertions, 463 deletions
diff --git a/slirp b/slirp
new file mode 160000
+Subproject 59a1b1f165458c2acb7ff0525b543945f741622
diff --git a/slirp/src/tftp.c b/slirp/src/tftp.c
deleted file mode 100644
index 2071dca2a6..0000000000
--- a/slirp/src/tftp.c
+++ /dev/null
@@ -1,463 +0,0 @@
-/* SPDX-License-Identifier: MIT */
-/*
- * tftp.c - a simple, read-only tftp server for qemu
- *
- * Copyright (c) 2004 Magnus Damm <damm@opensource.se>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "slirp.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-static inline int tftp_session_in_use(struct tftp_session *spt)
-{
- return (spt->slirp != NULL);
-}
-
-static inline void tftp_session_update(struct tftp_session *spt)
-{
- spt->timestamp = curtime;
-}
-
-static void tftp_session_terminate(struct tftp_session *spt)
-{
- if (spt->fd >= 0) {
- close(spt->fd);
- spt->fd = -1;
- }
- g_free(spt->filename);
- spt->slirp = NULL;
-}
-
-static int tftp_session_allocate(Slirp *slirp, struct sockaddr_storage *srcsas,
- struct tftp_t *tp)
-{
- struct tftp_session *spt;
- int k;
-
- for (k = 0; k < TFTP_SESSIONS_MAX; k++) {
- spt = &slirp->tftp_sessions[k];
-
- if (!tftp_session_in_use(spt))
- goto found;
-
- /* sessions time out after 5 inactive seconds */
- if ((int)(curtime - spt->timestamp) > 5000) {
- tftp_session_terminate(spt);
- goto found;
- }
- }
-
- return -1;
-
- found:
- memset(spt, 0, sizeof(*spt));
- memcpy(&spt->client_addr, srcsas, sockaddr_size(srcsas));
- spt->fd = -1;
- spt->block_size = 512;
- spt->client_port = tp->udp.uh_sport;
- spt->slirp = slirp;
-
- tftp_session_update(spt);
-
- return k;
-}
-
-static int tftp_session_find(Slirp *slirp, struct sockaddr_storage *srcsas,
- struct tftp_t *tp)
-{
- struct tftp_session *spt;
- int k;
-
- for (k = 0; k < TFTP_SESSIONS_MAX; k++) {
- spt = &slirp->tftp_sessions[k];
-
- if (tftp_session_in_use(spt)) {
- if (sockaddr_equal(&spt->client_addr, srcsas)) {
- if (spt->client_port == tp->udp.uh_sport) {
- return k;
- }
- }
- }
- }
-
- return -1;
-}
-
-static int tftp_read_data(struct tftp_session *spt, uint32_t block_nr,
- uint8_t *buf, int len)
-{
- int bytes_read = 0;
-
- if (spt->fd < 0) {
- spt->fd = open(spt->filename, O_RDONLY | O_BINARY);
- }
-
- if (spt->fd < 0) {
- return -1;
- }
-
- if (len) {
- lseek(spt->fd, block_nr * spt->block_size, SEEK_SET);
-
- bytes_read = read(spt->fd, buf, len);
- }
-
- return bytes_read;
-}
-
-static struct tftp_t *tftp_prep_mbuf_data(struct tftp_session *spt,
- struct mbuf *m)
-{
- struct tftp_t *tp;
-
- memset(m->m_data, 0, m->m_size);
-
- m->m_data += IF_MAXLINKHDR;
- if (spt->client_addr.ss_family == AF_INET6) {
- m->m_data += sizeof(struct ip6);
- } else {
- m->m_data += sizeof(struct ip);
- }
- tp = (void *)m->m_data;
- m->m_data += sizeof(struct udphdr);
-
- return tp;
-}
-
-static void tftp_udp_output(struct tftp_session *spt, struct mbuf *m,
- struct tftp_t *recv_tp)
-{
- if (spt->client_addr.ss_family == AF_INET6) {
- struct sockaddr_in6 sa6, da6;
-
- sa6.sin6_addr = spt->slirp->vhost_addr6;
- sa6.sin6_port = recv_tp->udp.uh_dport;
- da6.sin6_addr = ((struct sockaddr_in6 *)&spt->client_addr)->sin6_addr;
- da6.sin6_port = spt->client_port;
-
- udp6_output(NULL, m, &sa6, &da6);
- } else {
- struct sockaddr_in sa4, da4;
-
- sa4.sin_addr = spt->slirp->vhost_addr;
- sa4.sin_port = recv_tp->udp.uh_dport;
- da4.sin_addr = ((struct sockaddr_in *)&spt->client_addr)->sin_addr;
- da4.sin_port = spt->client_port;
-
- udp_output(NULL, m, &sa4, &da4, IPTOS_LOWDELAY);
- }
-}
-
-static int tftp_send_oack(struct tftp_session *spt,
- const char *keys[], uint32_t values[], int nb,
- struct tftp_t *recv_tp)
-{
- struct mbuf *m;
- struct tftp_t *tp;
- int i, n = 0;
-
- m = m_get(spt->slirp);
-
- if (!m)
- return -1;
-
- tp = tftp_prep_mbuf_data(spt, m);
-
- tp->tp_op = htons(TFTP_OACK);
- for (i = 0; i < nb; i++) {
- n += snprintf(tp->x.tp_buf + n, sizeof(tp->x.tp_buf) - n, "%s",
- keys[i]) + 1;
- n += snprintf(tp->x.tp_buf + n, sizeof(tp->x.tp_buf) - n, "%u",
- values[i]) + 1;
- }
-
- m->m_len = sizeof(struct tftp_t) - (TFTP_BLOCKSIZE_MAX + 2) + n
- - sizeof(struct udphdr);
- tftp_udp_output(spt, m, recv_tp);
-
- return 0;
-}
-
-static void tftp_send_error(struct tftp_session *spt,
- uint16_t errorcode, const char *msg,
- struct tftp_t *recv_tp)
-{
- struct mbuf *m;
- struct tftp_t *tp;
-
- DEBUG_TFTP("tftp error msg: %s", msg);
-
- m = m_get(spt->slirp);
-
- if (!m) {
- goto out;
- }
-
- tp = tftp_prep_mbuf_data(spt, m);
-
- tp->tp_op = htons(TFTP_ERROR);
- tp->x.tp_error.tp_error_code = htons(errorcode);
- slirp_pstrcpy((char *)tp->x.tp_error.tp_msg, sizeof(tp->x.tp_error.tp_msg), msg);
-
- m->m_len = sizeof(struct tftp_t) - (TFTP_BLOCKSIZE_MAX + 2) + 3 + strlen(msg)
- - sizeof(struct udphdr);
- tftp_udp_output(spt, m, recv_tp);
-
-out:
- tftp_session_terminate(spt);
-}
-
-static void tftp_send_next_block(struct tftp_session *spt,
- struct tftp_t *recv_tp)
-{
- struct mbuf *m;
- struct tftp_t *tp;
- int nobytes;
-
- m = m_get(spt->slirp);
-
- if (!m) {
- return;
- }
-
- tp = tftp_prep_mbuf_data(spt, m);
-
- tp->tp_op = htons(TFTP_DATA);
- tp->x.tp_data.tp_block_nr = htons((spt->block_nr + 1) & 0xffff);
-
- nobytes = tftp_read_data(spt, spt->block_nr, tp->x.tp_data.tp_buf,
- spt->block_size);
-
- if (nobytes < 0) {
- m_free(m);
-
- /* send "file not found" error back */
-
- tftp_send_error(spt, 1, "File not found", tp);
-
- return;
- }
-
- m->m_len = sizeof(struct tftp_t) - (TFTP_BLOCKSIZE_MAX - nobytes)
- - sizeof(struct udphdr);
- tftp_udp_output(spt, m, recv_tp);
-
- if (nobytes == spt->block_size) {
- tftp_session_update(spt);
- }
- else {
- tftp_session_terminate(spt);
- }
-
- spt->block_nr++;
-}
-
-static void tftp_handle_rrq(Slirp *slirp, struct sockaddr_storage *srcsas,
- struct tftp_t *tp, int pktlen)
-{
- struct tftp_session *spt;
- int s, k;
- size_t prefix_len;
- char *req_fname;
- const char *option_name[2];
- uint32_t option_value[2];
- int nb_options = 0;
-
- /* check if a session already exists and if so terminate it */
- s = tftp_session_find(slirp, srcsas, tp);
- if (s >= 0) {
- tftp_session_terminate(&slirp->tftp_sessions[s]);
- }
-
- s = tftp_session_allocate(slirp, srcsas, tp);
-
- if (s < 0) {
- return;
- }
-
- spt = &slirp->tftp_sessions[s];
-
- /* unspecified prefix means service disabled */
- if (!slirp->tftp_prefix) {
- tftp_send_error(spt, 2, "Access violation", tp);
- return;
- }
-
- /* skip header fields */
- k = 0;
- pktlen -= offsetof(struct tftp_t, x.tp_buf);
-
- /* prepend tftp_prefix */
- prefix_len = strlen(slirp->tftp_prefix);
- spt->filename = g_malloc(prefix_len + TFTP_FILENAME_MAX + 2);
- memcpy(spt->filename, slirp->tftp_prefix, prefix_len);
- spt->filename[prefix_len] = '/';
-
- /* get name */
- req_fname = spt->filename + prefix_len + 1;
-
- while (1) {
- if (k >= TFTP_FILENAME_MAX || k >= pktlen) {
- tftp_send_error(spt, 2, "Access violation", tp);
- return;
- }
- req_fname[k] = tp->x.tp_buf[k];
- if (req_fname[k++] == '\0') {
- break;
- }
- }
-
- DEBUG_TFTP("tftp rrq file: %s", req_fname);
-
- /* check mode */
- if ((pktlen - k) < 6) {
- tftp_send_error(spt, 2, "Access violation", tp);
- return;
- }
-
- if (strcasecmp(&tp->x.tp_buf[k], "octet") != 0) {
- tftp_send_error(spt, 4, "Unsupported transfer mode", tp);
- return;
- }
-
- k += 6; /* skipping octet */
-
- /* do sanity checks on the filename */
- if (!strncmp(req_fname, "../", 3) ||
- req_fname[strlen(req_fname) - 1] == '/' ||
- strstr(req_fname, "/../")) {
- tftp_send_error(spt, 2, "Access violation", tp);
- return;
- }
-
- /* check if the file exists */
- if (tftp_read_data(spt, 0, NULL, 0) < 0) {
- tftp_send_error(spt, 1, "File not found", tp);
- return;
- }
-
- if (tp->x.tp_buf[pktlen - 1] != 0) {
- tftp_send_error(spt, 2, "Access violation", tp);
- return;
- }
-
- while (k < pktlen && nb_options < G_N_ELEMENTS(option_name)) {
- const char *key, *value;
-
- key = &tp->x.tp_buf[k];
- k += strlen(key) + 1;
-
- if (k >= pktlen) {
- tftp_send_error(spt, 2, "Access violation", tp);
- return;
- }
-
- value = &tp->x.tp_buf[k];
- k += strlen(value) + 1;
-
- if (strcasecmp(key, "tsize") == 0) {
- int tsize = atoi(value);
- struct stat stat_p;
-
- if (tsize == 0) {
- if (stat(spt->filename, &stat_p) == 0)
- tsize = stat_p.st_size;
- else {
- tftp_send_error(spt, 1, "File not found", tp);
- return;
- }
- }
-
- option_name[nb_options] = "tsize";
- option_value[nb_options] = tsize;
- nb_options++;
- } else if (strcasecmp(key, "blksize") == 0) {
- int blksize = atoi(value);
-
- /* Accept blksize up to our maximum size */
- if (blksize > 0) {
- spt->block_size = MIN(blksize, TFTP_BLOCKSIZE_MAX);
- option_name[nb_options] = "blksize";
- option_value[nb_options] = spt->block_size;
- nb_options++;
- }
- }
- }
-
- if (nb_options > 0) {
- assert(nb_options <= G_N_ELEMENTS(option_name));
- tftp_send_oack(spt, option_name, option_value, nb_options, tp);
- return;
- }
-
- spt->block_nr = 0;
- tftp_send_next_block(spt, tp);
-}
-
-static void tftp_handle_ack(Slirp *slirp, struct sockaddr_storage *srcsas,
- struct tftp_t *tp, int pktlen)
-{
- int s;
-
- s = tftp_session_find(slirp, srcsas, tp);
-
- if (s < 0) {
- return;
- }
-
- tftp_send_next_block(&slirp->tftp_sessions[s], tp);
-}
-
-static void tftp_handle_error(Slirp *slirp, struct sockaddr_storage *srcsas,
- struct tftp_t *tp, int pktlen)
-{
- int s;
-
- s = tftp_session_find(slirp, srcsas, tp);
-
- if (s < 0) {
- return;
- }
-
- tftp_session_terminate(&slirp->tftp_sessions[s]);
-}
-
-void tftp_input(struct sockaddr_storage *srcsas, struct mbuf *m)
-{
- struct tftp_t *tp = (struct tftp_t *)m->m_data;
-
- switch(ntohs(tp->tp_op)) {
- case TFTP_RRQ:
- tftp_handle_rrq(m->slirp, srcsas, tp, m->m_len);
- break;
-
- case TFTP_ACK:
- tftp_handle_ack(m->slirp, srcsas, tp, m->m_len);
- break;
-
- case TFTP_ERROR:
- tftp_handle_error(m->slirp, srcsas, tp, m->m_len);
- break;
- }
-}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-25 13:18:21 +0000