xan/patty
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Ensure socket TX buf size is separate from RX size

Browse source 
After performing XID parameter negotiation, do not simply use the
negotiated TX buffer size when allocating the RX buffer; this resolves
an issue wherein read()s into the RX buffer (allocated with a size equal
to the TX buffer, which may be smaller) would cause memory errors
This commit is contained in:
XANTRONIX 2020-07-26 01:55:21 -04:00 • committed by XANTRONIX Industrial
parent 1ba57a8df2
commit 3ef0da27b5
1 changed files with 8 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
src/sock.c
View file

@ -54,10 +54,14 @@ error_open:
return -1; return -1;
} }
static inline size_t bufsz(patty_ax25_sock *sock) { static inline size_t tx_bufsz(patty_ax25_sock *sock) {
return PATTY_AX25_FRAME_OVERHEAD + sock->n_maxlen_tx; return PATTY_AX25_FRAME_OVERHEAD + sock->n_maxlen_tx;
} }
static inline size_t rx_bufsz(patty_ax25_sock *sock) {
return PATTY_AX25_FRAME_OVERHEAD + sock->n_maxlen_rx;
}
static inline size_t tx_slot_size(patty_ax25_sock *sock) { static inline size_t tx_slot_size(patty_ax25_sock *sock) {
return sizeof(size_t) + PATTY_AX25_FRAME_OVERHEAD + sock->n_maxlen_tx; return sizeof(size_t) + PATTY_AX25_FRAME_OVERHEAD + sock->n_maxlen_tx;
} }
@ -74,11 +78,11 @@ static inline void *tx_slot(patty_ax25_sock *sock, size_t seq) {
} }
static int init_bufs(patty_ax25_sock *sock) { static int init_bufs(patty_ax25_sock *sock) {
if ((sock->tx_buf = realloc(sock->tx_buf, bufsz(sock))) == NULL) { if ((sock->tx_buf = realloc(sock->tx_buf, tx_bufsz(sock))) == NULL) {
goto error_realloc_tx_buf; goto error_realloc_tx_buf;
} }
if ((sock->rx_buf = realloc(sock->rx_buf, bufsz(sock))) == NULL) { if ((sock->rx_buf = realloc(sock->rx_buf, rx_bufsz(sock))) == NULL) {
goto error_realloc_rx_buf; goto error_realloc_rx_buf;
} }
@ -398,7 +402,7 @@ ssize_t patty_ax25_sock_send(patty_ax25_sock *sock,
goto error_toobig; goto error_toobig;
} }
if ((encoded = encode_address(sock, cr, buf, bufsz(sock))) < 0) { if ((encoded = encode_address(sock, cr, buf, tx_bufsz(sock))) < 0) {
goto error_encode_address; goto error_encode_address;
} else { } else {
offset += encoded; offset += encoded;