[sr-dev] git:5.1:a874ac69: core: more checks when printing udp recv debug message

Module: kamailio Branch: 5.1 Commit: a874ac693bdeaaf913f3a260f0ed0294ea3668f2 URL: https://github.com/kamailio/kamailio/commit/a874ac693bdeaaf913f3a260f0ed029… Author: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Committer: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Date: 2017-12-01T14:25:40+01:00 core: more checks when printing udp recv debug message (cherry picked from commit 0e0cd2be0c77f84575526a39c6e3baa199e18d02) --- Modified: src/core/udp_server.c --- Diff: https://github.com/kamailio/kamailio/commit/a874ac693bdeaaf913f3a260f0ed029… Patch: https://github.com/kamailio/kamailio/commit/a874ac693bdeaaf913f3a260f0ed029… --- diff --git a/src/core/udp_server.c b/src/core/udp_server.c index 0392136385..b88d3d8f51 100644 --- a/src/core/udp_server.c +++ b/src/core/udp_server.c @@ -425,7 +425,9 @@ int udp_rcv_loop() unsigned int fromlen; struct receive_info ri; sr_event_param_t evp = {0}; - char printbuf[512]; +#define UDP_RCV_PRINTBUF_SIZE 512 +#define UDP_RCV_PRINT_LEN 100 + char printbuf[UDP_RCV_PRINTBUF_SIZE]; int i; int j; int l; @@ -472,20 +474,22 @@ int udp_rcv_loop() if(is_printable(L_DBG) && len>10) { j = 0; - for(i=0; i<len && i<100; i++) { + for(i=0; i<len && i<UDP_RCV_PRINT_LEN + && j+8<UDP_RCV_PRINTBUF_SIZE; i++) { if(isprint(buf[i])) { printbuf[j++] = buf[i]; } else { l = snprintf(printbuf+j, 6, " %02X ", buf[i]); if(l<0 || l>=6) { - LM_ERR("print buffer building failed\n"); + LM_ERR("print buffer building failed (%d/%d/%d)\n", + l, j, i); goto error; } j += l; } } - LM_DBG("received on udp socket: (%d/%d) [[%.*s]]\n", - j, len, len, printbuf); + LM_DBG("received on udp socket: (%d/%d/%d) [[%.*s]]\n", + j, i, len, j, printbuf); } ri.src_su=*from; su2ip_addr(&ri.src_ip, from);