Revision 5fafdf24 slirp/tftp.c
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/* |
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* tftp.c - a simple, read-only tftp server for qemu |
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*
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* |
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* Copyright (c) 2004 Magnus Damm <damm@opensource.se> |
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*
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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struct tftp_session {
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int in_use; |
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unsigned char filename[TFTP_FILENAME_MAX]; |
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struct in_addr client_ip; |
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u_int16_t client_port; |
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int timestamp; |
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}; |
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return bytes_read; |
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} |
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static int tftp_send_oack(struct tftp_session *spt,
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static int tftp_send_oack(struct tftp_session *spt, |
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const char *key, uint32_t value, |
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struct tftp_t *recv_tp) |
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{
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m->m_data += if_maxlinkhdr; |
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tp = (void *)m->m_data; |
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m->m_data += sizeof(struct udpiphdr); |
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tp->tp_op = htons(TFTP_OACK); |
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n += sprintf(tp->x.tp_buf + n, "%s", key) + 1; |
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n += sprintf(tp->x.tp_buf + n, "%u", value) + 1; |
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saddr.sin_addr = recv_tp->ip.ip_dst; |
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saddr.sin_port = recv_tp->udp.uh_dport; |
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daddr.sin_addr = spt->client_ip; |
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daddr.sin_port = spt->client_port; |
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m->m_len = sizeof(struct tftp_t) - 514 + n -
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m->m_len = sizeof(struct tftp_t) - 514 + n - |
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sizeof(struct ip) - sizeof(struct udphdr); |
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udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY); |
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static int tftp_send_error(struct tftp_session *spt,
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static int tftp_send_error(struct tftp_session *spt, |
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u_int16_t errorcode, const char *msg, |
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struct tftp_t *recv_tp) |
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{
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m->m_data += if_maxlinkhdr; |
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tp = (void *)m->m_data; |
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m->m_data += sizeof(struct udpiphdr); |
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tp->tp_op = htons(TFTP_ERROR); |
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tp->x.tp_error.tp_error_code = htons(errorcode); |
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strcpy(tp->x.tp_error.tp_msg, msg); |
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nobytes = 2; |
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m->m_len = sizeof(struct tftp_t) - 514 + 3 + strlen(msg) -
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m->m_len = sizeof(struct tftp_t) - 514 + 3 + strlen(msg) - |
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sizeof(struct ip) - sizeof(struct udphdr); |
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udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY); |
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return 0; |
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} |
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static int tftp_send_data(struct tftp_session *spt,
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static int tftp_send_data(struct tftp_session *spt, |
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u_int16_t block_nr, |
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struct tftp_t *recv_tp) |
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{
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m->m_data += if_maxlinkhdr; |
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tp = (void *)m->m_data; |
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m->m_data += sizeof(struct udpiphdr); |
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tp->tp_op = htons(TFTP_DATA); |
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tp->x.tp_data.tp_block_nr = htons(block_nr); |
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return -1; |
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} |
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m->m_len = sizeof(struct tftp_t) - (512 - nobytes) -
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m->m_len = sizeof(struct tftp_t) - (512 - nobytes) - |
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sizeof(struct ip) - sizeof(struct udphdr); |
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udp_output2(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY); |
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else {
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return; |
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} |
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if (src[k] == '\0') {
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break; |
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} |
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} |
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if (k >= n) {
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return; |
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} |
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k++; |
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/* check mode */ |
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if ((n - k) < 6) {
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return; |
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} |
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if (memcmp(&src[k], "octet\0", 6) != 0) {
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tftp_send_error(spt, 4, "Unsupported transfer mode", tp); |
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return; |
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} |
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/* check if the file exists */ |
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if (tftp_read_data(spt, 0, spt->filename, 0) < 0) {
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tftp_send_error(spt, 1, "File not found", tp); |
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return; |
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return; |
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} |
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if (tftp_send_data(&tftp_sessions[s],
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ntohs(tp->x.tp_data.tp_block_nr) + 1,
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if (tftp_send_data(&tftp_sessions[s], |
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ntohs(tp->x.tp_data.tp_block_nr) + 1, |
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tp) < 0) {
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return; |
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} |
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