diff options
Diffstat (limited to 'resolv/res_send.c')
| -rw-r--r-- | resolv/res_send.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/resolv/res_send.c b/resolv/res_send.c index 5a10faa393..d2c97d0cd4 100644 --- a/resolv/res_send.c +++ b/resolv/res_send.c @@ -409,6 +409,7 @@ res_send(buf, buflen, ans, anssiz) /* * Receive length & response */ +read_len: cp = ans; len = INT16SZ; while ((n = read(s, (char *)cp, (int)len)) > 0) { @@ -477,6 +478,20 @@ res_send(buf, buflen, ans, anssiz) break; } } + /* + * The calling applicating has bailed out of + * a previous call and failed to arrange to have + * the circuit closed or the server has got + * itself confused. Anyway drop the packet and + * wait for the correct one. + */ + if (hp->id != anhp->id) { + DprintQ((_res.options & RES_DEBUG) || + (_res.pfcode & RES_PRF_REPLY), + (stdout, ";; old answer (unexpected):\n"), + ans, (resplen>anssiz)?anssiz:resplen); + goto read_len; + } } else { /* * Use datagrams. @@ -593,6 +608,8 @@ res_send(buf, buflen, ans, anssiz) n = select(s+1, &dsmask, (fd_set *)NULL, (fd_set *)NULL, &timeout); if (n < 0) { + if (errno == EINTR) + goto wait; Perror(stderr, "select", errno); _res_close(); goto next_ns; @@ -626,7 +643,7 @@ res_send(buf, buflen, ans, anssiz) DprintQ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_REPLY), (stdout, ";; old answer:\n"), - ans, resplen); + ans, (resplen>anssiz)?anssiz:resplen); goto wait; } #if CHECK_SRVR_ADDR @@ -640,7 +657,7 @@ res_send(buf, buflen, ans, anssiz) DprintQ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_REPLY), (stdout, ";; not our server:\n"), - ans, resplen); + ans, (resplen>anssiz)?anssiz:resplen); goto wait; } #endif @@ -655,7 +672,7 @@ res_send(buf, buflen, ans, anssiz) DprintQ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_REPLY), (stdout, ";; wrong query name:\n"), - ans, resplen); + ans, (resplen>anssiz)?anssiz:resplen); goto wait; } if (anhp->rcode == SERVFAIL || @@ -663,7 +680,7 @@ res_send(buf, buflen, ans, anssiz) anhp->rcode == REFUSED) { DprintQ(_res.options & RES_DEBUG, (stdout, "server rejected query:\n"), - ans, resplen); + ans, (resplen>anssiz)?anssiz:resplen); badns |= (1 << ns); _res_close(); /* don't retry if called from dig */ @@ -689,7 +706,7 @@ res_send(buf, buflen, ans, anssiz) DprintQ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_REPLY), (stdout, ""), - ans, resplen); + ans, (resplen>anssiz)?anssiz:resplen); /* * If using virtual circuits, we assume that the first server * is preferred over the rest (i.e. it is on the local |