diff options
Diffstat (limited to 'net/tftp.c')
| -rw-r--r-- | net/tftp.c | 28 |
1 files changed, 20 insertions, 8 deletions
@@ -106,6 +106,7 @@ TftpSend (void) volatile uchar * pkt; volatile uchar * xp; int len = 0; + volatile ushort *s; /* * We will always be sending some sort of packet, so @@ -117,7 +118,9 @@ TftpSend (void) case STATE_RRQ: xp = pkt; - *((ushort *)pkt)++ = htons(TFTP_RRQ); + s = (ushort *)pkt; + *s++ = htons(TFTP_RRQ); + pkt = (uchar *)s; strcpy ((char *)pkt, tftp_filename); pkt += strlen(tftp_filename) + 1; strcpy ((char *)pkt, "octet"); @@ -135,15 +138,19 @@ TftpSend (void) case STATE_DATA: case STATE_OACK: xp = pkt; - *((ushort *)pkt)++ = htons(TFTP_ACK); - *((ushort *)pkt)++ = htons(TftpBlock); + s = (ushort *)pkt; + *s++ = htons(TFTP_ACK); + *s++ = htons(TftpBlock); + pkt = (uchar *)s; len = pkt - xp; break; case STATE_TOO_LARGE: xp = pkt; - *((ushort *)pkt)++ = htons(TFTP_ERROR); - *((ushort *)pkt)++ = htons(3); + s = (ushort *)pkt; + *s++ = htons(TFTP_ERROR); + *s++ = htons(3); + pkt = (uchar *)s; strcpy ((char *)pkt, "File too large"); pkt += 14 /*strlen("File too large")*/ + 1; len = pkt - xp; @@ -151,8 +158,10 @@ TftpSend (void) case STATE_BAD_MAGIC: xp = pkt; - *((ushort *)pkt)++ = htons(TFTP_ERROR); - *((ushort *)pkt)++ = htons(2); + s = (ushort *)pkt; + *s++ = htons(TFTP_ERROR); + *s++ = htons(2); + pkt = (uchar *)s; strcpy ((char *)pkt, "File has bad magic"); pkt += 18 /*strlen("File has bad magic")*/ + 1; len = pkt - xp; @@ -167,6 +176,7 @@ static void TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) { ushort proto; + ushort *s; if (dest != TftpOurPort) { return; @@ -180,7 +190,9 @@ TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) } len -= 2; /* warning: don't use increment (++) in ntohs() macros!! */ - proto = *((ushort *)pkt)++; + s = (ushort *)pkt; + proto = *s++; + pkt = (uchar *)s; switch (ntohs(proto)) { case TFTP_RRQ: |