forked from osmocom/wireshark
When we get an EOF, only return WTAP_ERR_SHORT_READ as the error if we
were in the middle of processing a record. If we got one at the *beginning* of the record, that just means we've come to a clean end-of-file. svn path=/trunk/; revision=13064
This commit is contained in:
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d1ae7c688f
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714ca234a6
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@ -88,8 +88,9 @@ Daniel Thompson (STMicroelectronics) <daniel.thompson@st.com>
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#define PPPD_TIME_STEP_SHORT 0x06
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#define PPPD_RESET_TIME 0x07
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/* this buffer must be at least (2*PPPD_MTU) + sizeof(ppp_header) + sizeof(lcp_header) +
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* sizeof(ipcp_header). PPPD_MTU is *very* rarely larger than 1500 so this value is fine
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/* this buffer must be at least (2*PPPD_MTU) + sizeof(ppp_header) +
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* sizeof(lcp_header) + sizeof(ipcp_header). PPPD_MTU is *very* rarely
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* larger than 1500 so this value is fine.
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*/
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#define PPPD_BUF_SIZE 8192
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@ -365,8 +366,8 @@ pppdump_read(wtap *wth, int *err, gchar **err_info, long *data_offset)
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/* Returns number of bytes copied for record, -1 if failure.
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*
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* This is modeled after pppdump.c, the utility to parse pppd log files; it comes with the ppp
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* distribution.
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* This is modeled after pppdump.c, the utility to parse pppd log files; it
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* comes with the ppp distribution.
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*/
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static int
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process_data(pppdump_t *state, FILE_T fh, pkt_t *pkt, int n, guint8 *pd,
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@ -378,16 +379,15 @@ process_data(pppdump_t *state, FILE_T fh, pkt_t *pkt, int n, guint8 *pd,
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for (; num_bytes > 0; --num_bytes) {
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c = file_getc(fh);
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if (c == EOF) {
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*err = file_error(fh);
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if (*err == 0) {
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*err = WTAP_ERR_SHORT_READ;
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}
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return -1;
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}
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state->offset++;
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switch (c) {
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case EOF:
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*err = file_error(fh);
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if (*err == 0) {
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*err = WTAP_ERR_SHORT_READ;
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}
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return -1;
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break;
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case 0x7e:
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/*
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* Flag Sequence for RFC 1662 HDLC-like
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@ -534,6 +534,7 @@ collate(pppdump_t* state, FILE_T fh, int *err, gchar **err_info, guint8 *pd,
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pkt_t *pkt = NULL;
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int byte0, byte1;
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int n, num_written = 0;
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long start_offset;
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guint32 time_long;
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guint8 time_short;
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@ -569,6 +570,7 @@ collate(pppdump_t* state, FILE_T fh, int *err, gchar **err_info, guint8 *pd,
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* That didn't get all the data for this packet, so process
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* subsequent records.
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*/
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start_offset = state->offset;
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while ((id = file_getc(fh)) != EOF) {
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state->offset++;
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switch (id) {
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@ -586,21 +588,14 @@ collate(pppdump_t* state, FILE_T fh, int *err, gchar **err_info, guint8 *pd,
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* Get the length of the record.
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*/
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byte0 = file_getc(fh);
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if (byte0 == EOF) {
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*err = file_error(fh);
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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if (byte0 == EOF)
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goto done;
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state->offset++;
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byte1 = file_getc(fh);
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if (byte1 == EOF) {
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*err = file_error(fh);
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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if (byte1 == EOF)
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goto done;
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state->offset++;
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n = (byte0 << 8) | byte1;
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state->offset += 2;
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if (pkt->id_offset == 0) {
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/*
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@ -621,12 +616,8 @@ collate(pppdump_t* state, FILE_T fh, int *err, gchar **err_info, guint8 *pd,
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g_assert(num_bytes_to_skip < n);
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while (num_bytes_to_skip) {
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if (file_getc(fh) == EOF) {
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*err = file_error(fh);
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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if (file_getc(fh) == EOF)
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goto done;
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state->offset++;
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num_bytes_to_skip--;
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n--;
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@ -643,7 +634,6 @@ collate(pppdump_t* state, FILE_T fh, int *err, gchar **err_info, guint8 *pd,
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return TRUE;
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}
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/* if 0 bytes written, keep looping */
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break;
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case PPPD_SEND_DELIM:
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@ -691,9 +681,18 @@ collate(pppdump_t* state, FILE_T fh, int *err, gchar **err_info, guint8 *pd,
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}
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done:
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*err = file_error(fh);
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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if (*err == 0) {
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if (state->offset != start_offset) {
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/*
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* We read at least one byte, so we were working
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* on a record; an EOF means that record was
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* cut short.
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*/
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*err = WTAP_ERR_SHORT_READ;
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}
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}
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return FALSE;
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}
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